Akira

Detection prerequisites: Log source: antivirus

False positives: Unlikely

title: Antivirus - Exploitation Framework Signature
id: 238527ad-3c2c-4e4f-a1f6-92fd63adb864
status: stable
description: |
    Detects a highly relevant Antivirus alert that reports an exploitation framework.
    This event must not be ignored just because the AV has blocked the malware but investigate, how it came there in the first place.
references:
    - https://www.nextron-systems.com/?s=antivirus
    - https://www.virustotal.com/gui/file/925b0b28472d4d79b4bf92050e38cc2b8f722691c713fc28743ac38551bc3797
    - https://www.virustotal.com/gui/file/8f8daabe1c8ceb5710949283818e16c4aa8059bf2ce345e2f2c90b8692978424
    - https://www.virustotal.com/gui/file/d9669f7e3eb3a9cdf6a750eeb2ba303b5ae148a43e36546896f1d1801e912466
author: Florian Roth (Nextron Systems), Arnim Rupp
date: 2018-09-09
modified: 2026-06-15
tags:
    - attack.execution
    - attack.t1203
    - attack.command-and-control
    - attack.t1219.002
logsource:
    category: antivirus
detection:
    selection:
        Signature|contains:
            - 'ATK/Cobalt'
            - 'Backdoor.Cobalt'
            - 'Beacon'
            - 'Brutel'
            - 'BruteR'
            - 'CbltStr'
            - 'CobaltStr'
            - 'COBALT.SMD'
            - 'COBEACON'
            - 'Cometer'
            - 'Exploit.Script.CVE'
            - 'IISExchgSpawnCMD'
            - 'Metasploit'
            - 'Meterpreter'
            - 'MeteTool'
            - 'Mpreter'
            - 'MsfShell'
            - 'PowerSploit'
            - 'Razy'
            - 'Rozena'
            - 'Sbelt'
            - 'Seatbelt'
            - 'Sliver'
            - 'Swrort'
    condition: selection
falsepositives:
    - Unlikely
level: critical

Detection prerequisites: Log source: antivirus

False positives: Unlikely

title: Antivirus - Password Dumper Signature
id: 78cc2dd2-7d20-4d32-93ff-057084c38b93
status: stable
description: |
    Detects a highly relevant Antivirus alert that reports password dumpers and stealers.
    This event must not be ignored just because the AV has blocked the malware but investigate, how it came there in the first place and check if passwords need to be reset.
references:
    - https://www.nextron-systems.com/?s=antivirus
    - https://www.virustotal.com/gui/file/5fcda49ee7f202559a6cbbb34edb65c33c9a1e0bde9fa2af06a6f11b55ded619
    - https://www.virustotal.com/gui/file/a4edfbd42595d5bddb442c82a02cf0aaa10893c1bf79ea08b9ce576f82749448
author: Florian Roth (Nextron Systems), Arnim Rupp
date: 2018-09-09
modified: 2026-06-15
tags:
    - attack.credential-access
    - attack.t1003
    - attack.t1558
    - attack.t1003.001
    - attack.t1003.002
logsource:
    category: antivirus
detection:
    selection:
        - Signature|startswith: 'PWS'
        - Signature|contains:
              - 'Certify'
              - 'DCSync'
              - 'Creddump'
              - 'DumpCreds'
              - 'DumpLsass'
              - 'DumpPert'
              - 'FormBook'
              - 'HTool/WCE'
              - 'Kekeo'
              - 'Lazagne'
              - 'LsassDump'
              - 'Lummast'
              - 'Mimikatz'
              - 'MultiDump'
              - 'Multiverze'
              - 'Nanodump'
              - 'NativeDump'
              - 'Outflank'
              - 'PShlSpy'
              - 'PSWTool'
              - 'PWCrack'
              - 'PWDump'
              - 'PWS.'
              - 'PWSX'
              - 'pypykatz'
              - 'Rubeus'
              - 'SafetyKatz'
              - 'SecurityTool'
              - 'SharpChrome'
              - 'SharpDPAPI'
              - 'SharpDump'
              - 'SharpKatz'
              - 'SharpS.' # Sharpsploit, e.g. 530ea2ff9049f5dfdfa0a2e9c27c2e3c0685eb6cbdf85370c20a7bfae49f592d
              - 'ShpKatz'
              - 'Steal'
              - 'TrickDump'
              - 'wsass'
    condition: selection
falsepositives:
    - Unlikely
level: critical

Detection prerequisites: Platform: windows · Log source: process_creation

False positives: Unknown

title: Exploit for CVE-2015-1641
id: 7993792c-5ce2-4475-a3db-a3a5539827ef
status: stable
description: Detects Winword starting uncommon sub process MicroScMgmt.exe as used in exploits for CVE-2015-1641
references:
    - https://www.virustotal.com/en/file/5567408950b744c4e846ba8ae726883cb15268a539f3bb21758a466e47021ae8/analysis/
    - https://www.hybrid-analysis.com/sample/5567408950b744c4e846ba8ae726883cb15268a539f3bb21758a466e47021ae8?environmentId=100
author: Florian Roth (Nextron Systems)
date: 2018-02-22
modified: 2021-11-27
tags:
    - attack.stealth
    - attack.t1036.005
    - cve.2015-1641
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\WINWORD.EXE'
        Image|endswith: '\MicroScMgmt.exe'
    condition: selection
falsepositives:
    - Unknown
level: critical

Detection prerequisites: Platform: windows · Log source: process_creation

False positives: Unlikely

title: HackTool - Rubeus Execution
id: 7ec2c172-dceb-4c10-92c9-87c1881b7e18
related:
    - id: 7ec2c172-dceb-4c10-92c9-87c1881b7e18
      type: similar
status: stable
description: Detects the execution of the hacktool Rubeus via PE information of command line parameters
references:
    - https://blog.harmj0y.net/redteaming/from-kekeo-to-rubeus
    - https://m0chan.github.io/2019/07/31/How-To-Attack-Kerberos-101.html
    - https://github.com/GhostPack/Rubeus
author: Florian Roth (Nextron Systems)
date: 2018-12-19
modified: 2023-04-20
tags:
    - attack.credential-access
    - attack.t1003
    - attack.t1558.003
    - attack.lateral-movement
    - attack.t1550.003
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        - Image|endswith: '\Rubeus.exe'
        - OriginalFileName: 'Rubeus.exe'
        - Description: 'Rubeus'
        - CommandLine|contains:
              - 'asreproast '
              - 'dump /service:krbtgt '
              - 'dump /luid:0x'
              - 'kerberoast '
              - 'createnetonly /program:'
              - 'ptt /ticket:'
              - '/impersonateuser:'
              - 'renew /ticket:'
              - 'asktgt /user:'
              - 'harvest /interval:'
              - 's4u /user:'
              - 's4u /ticket:'
              - 'hash /password:'
              - 'golden /aes256:'
              - 'silver /user:'
    condition: selection
falsepositives:
    - Unlikely
level: critical

Detection prerequisites: Platform: windows · Log source: process_creation

False positives: Unlikely

title: LockerGoga Ransomware Activity
id: 74db3488-fd28-480a-95aa-b7af626de068
status: stable
description: Detects LockerGoga ransomware activity via specific command line.
references:
    - https://medium.com/@malwaredancer/lockergoga-input-arguments-ipc-communication-and-others-bd4e5a7ba80a
    - https://blog.f-secure.com/analysis-of-lockergoga-ransomware/
    - https://www.carbonblack.com/blog/tau-threat-intelligence-notification-lockergoga-ransomware/
author: Vasiliy Burov, oscd.community
date: 2020-10-18
modified: 2023-02-03
tags:
    - attack.impact
    - attack.t1486
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains: '-i SM-tgytutrc -s'
    condition: selection
falsepositives:
    - Unlikely
level: critical

Detection prerequisites: Platform: aws · Service: cloudtrail

False positives: System or Network administrator behaviors; DEV, UAT, SAT environment. You should apply this rule with PROD environment only.

title: AWS SecurityHub Findings Evasion
id: a607e1fe-74bf-4440-a3ec-b059b9103157
status: stable
description: Detects the modification of the findings on SecurityHub.
references:
    - https://docs.aws.amazon.com/cli/latest/reference/securityhub/
author: Sittikorn S
date: 2021-06-28
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: aws
    service: cloudtrail
detection:
    selection:
        eventSource: securityhub.amazonaws.com
        eventName:
            - 'BatchUpdateFindings'
            - 'DeleteInsight'
            - 'UpdateFindings'
            - 'UpdateInsight'
    condition: selection
falsepositives:
    - System or Network administrator behaviors
    - DEV, UAT, SAT environment. You should apply this rule with PROD environment only.
level: high

Detection prerequisites: Platform: windows · Log source: process_creation

False positives: Unknown

title: HackTool - CrackMapExec Execution Patterns
id: 058f4380-962d-40a5-afce-50207d36d7e2
status: stable
description: Detects various execution patterns of the CrackMapExec pentesting framework
references:
    - https://github.com/byt3bl33d3r/CrackMapExec
author: Thomas Patzke
date: 2020-05-22
modified: 2023-11-06
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.execution
    - attack.t1047
    - attack.t1053
    - attack.t1059.003
    - attack.t1059.001
    - attack.s0106
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains:
            # cme/protocols/smb/wmiexec.py (generalized execute_remote and execute_fileless)
            - 'cmd.exe /Q /c * 1> \\\\*\\*\\* 2>&1'
            # cme/protocols/smb/atexec.py:109 (fileless output via share)
            - 'cmd.exe /C * > \\\\*\\*\\* 2>&1'
            # cme/protocols/smb/atexec.py:111 (fileless output via share)
            - 'cmd.exe /C * > *\\Temp\\* 2>&1'
            # https://github.com/byt3bl33d3r/CrackMapExec/blob/d8c50c8cbaf36c29329078662473f75e440978d2/cme/helpers/powershell.py#L136 (PowerShell execution with obfuscation)
            - 'powershell.exe -exec bypass -noni -nop -w 1 -C "'
            # https://github.com/byt3bl33d3r/CrackMapExec/blob/d8c50c8cbaf36c29329078662473f75e440978d2/cme/helpers/powershell.py#L160 (PowerShell execution without obfuscation)
            - 'powershell.exe -noni -nop -w 1 -enc '
    condition: selection
falsepositives:
    - Unknown
level: high

Detection prerequisites: Platform: windows · Service: windefend

False positives: Administrator might try to disable defender features during testing (must be investigated)

title: Microsoft Defender Tamper Protection Trigger
id: 49e5bc24-8b86-49f1-b743-535f332c2856
status: stable
description: Detects blocked attempts to change any of Defender's settings such as "Real Time Monitoring" and "Behavior Monitoring"
references:
    - https://bhabeshraj.com/post/tampering-with-microsoft-defenders-tamper-protection
    - https://learn.microsoft.com/en-us/defender-endpoint/troubleshoot-microsoft-defender-antivirus?view=o365-worldwide
author: Bhabesh Raj, Nasreddine Bencherchali
date: 2021-07-05
modified: 2022-12-06
tags:
    - attack.defense-impairment
    - attack.t1685
logsource:
    product: windows
    service: windefend
detection:
    selection:
        EventID: 5013 # Tamper protection blocked a change to Microsoft Defender Antivirus. If Tamper protection is enabled then, any attempt to change any of Defender's settings is blocked. Event ID 5013 is generated and states which setting change was blocked.
        Value|endswith:
            - '\Windows Defender\DisableAntiSpyware'
            - '\Windows Defender\DisableAntiVirus'
            - '\Windows Defender\Scan\DisableArchiveScanning'
            - '\Windows Defender\Scan\DisableScanningNetworkFiles'
            - '\Real-Time Protection\DisableRealtimeMonitoring'
            - '\Real-Time Protection\DisableBehaviorMonitoring'
            - '\Real-Time Protection\DisableIOAVProtection'
            - '\Real-Time Protection\DisableScriptScanning'
    condition: selection
falsepositives:
    - Administrator might try to disable defender features during testing (must be investigated)
level: high