Query: write Sigma for Detects the load of RstrtMgr DLL (Restart Manager) by an uncommon process. This library has been used during ransomware
Matching passage: Sigma rule: Detects the load of RstrtMgr DLL (Restart Manager) by an uncommon process. This library has been used during ransomware. Logsource: windows / image_load. Rule: title: Load Of RstrtMgr.DLL By An Uncommon Process id: 3669afd2-9891-4534-a626-e5cf03810a61 related: - id: b48492dc-c5ef-4572-8dff-32bc241c15c8 type: derived status: test description: 'Detects the load of RstrtMgr DLL (Restart Manager) by an uncommon process. This library has been used during ransomware campaigns to kill processes that would prevent file encryption by locking them (e.g. Conti ransomware, Cactus ransomware). It has also recently been seen used by the BiBi wiper for Windows. It could also be used for anti-analysis purposes by shut downing specific processes. ' references: - https://www.crowdstrike.com/blog/windows-restart-manager-part-1/ - https://www.crowdstrike.com/blog/windows-restart-manager-part-2/ - https://web.archive.org/web/20231221193106/https://www.swascan.com/cactus-ransomware-malware-analysis/ - https://taiwan.postsen.com/business/88601/Hamas-hackers-use-data-destruction-software-BiBi-which-consumes-a-lot-of-processor-resources-to-wipe-Windows-computer-data--iThome.html author: Luc Génaux date: 2023-11-28 modified: 2026-07-28 tags: - attack.impact - attack.defense-impairment - attack.t1486 - attack.t1685 logsource: category: image_load product: windows detection: selection: - ImageLoaded|endswith: \RstrtMgr.dll - OriginalFileName: RstrtMgr.dll filter_main_generic: Image|startswith: - C:\$WINDOWS.~BT\ - C:\$WinREAgent\ - C:\Program Files (x86)\ - C:\Program Files\ - C:\ProgramData\ - C:\Windows\explorer.exe - C:\Windows\SoftwareDistribution\ - C:\Windows\SysNative\ - C:\Windows\System32\ - C:\Windows\SysWOW64\ - C:\Windows\WinSxS\ - C:\WUDownloadCache\ filter_main_user_software_installations: Image|startswith: C:\Users\ Image|contains|all: - \AppData\Local\Temp\is- - .tmp\ Image|endswith: .tmp filter_main_admin_software_installations: Image|startswith: C:\Windows\Temp\ filter_optional_onedrive_1: Image|startswith: C:\Users\ Image|endswith: - \AppData\Local\Microsoft\OneDrive\OneDrive.exe - \AppData\Local\Microsoft\OneDrive\OneDriveStandaloneUpdater.exe filter_optional_onedrive_2: Image|startswith: C:\Users\ Image|contains: \AppData\Local\Microsoft\OneDrive\ Image|endswith: \OneDrive.Sync.Service.exe condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Other legitimate Windows processes not currently listed - Processes related to software installation level: low
Near-miss passage: Sigma rule: Detects weak passwords or often abused passwords (seen used by threat actors) via the CLI. An example would be a threat. Logsource: windows / process_creation. Rule: title: Weak or Abused Passwords In CLI id: 91edcfb1-2529-4ac2-9ecc-7617f895c7e4 status: test description: 'Detects weak passwords or often abused passwords (seen used by threat actors) via the CLI. An example would be a threat actor creating a new user via the net command and providing the password inline ' references: - https://symantec-enterprise-blogs.security.com/blogs/threat-intelligence/espionage-asia-governments - https://thedfirreport.com/2022/09/26/bumblebee-round-two/ - https://www.microsoft.com/en-us/security/blog/2022/10/25/dev-0832-vice-society-opportunistic-ransomware-campaigns-impacting-us-education-sector/ - https://www.huntress.com/blog/slashandgrab-screen-connect-post-exploitation-in-the-wild-cve-2024-1709-cve-2024-1708 author: Nasreddine Bencherchali (Nextron Systems) date: 2022-09-14 modified: 2024-02-23 tags: - attack.execution - attack.stealth logsource: category: process_creation product: windows detection: selection: CommandLine|contains: - '123456789' - 123123qwE - Asd123.aaaa - Decryptme - P@ssw0rd! - Pass8080 - password123 - test@202 condition: selection falsepositives: - Legitimate usage of the passwords by users via commandline (should be discouraged) - Other currently unknown false positives level: medium