Emerging Threatcriticaltest
Qakbot Rundll32 Exports Execution
Detects specific process tree behavior of a "rundll32" execution with exports linked with Qakbot activity.
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X__Junior (Nextron Systems)Created Wed May 24Updated Tue May 30339ed3d6-5490-46d0-96a7-8abe33078f582023
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic2 selectors
detection:
selection_paths:
ParentImage|endswith:
# Note: Only add processes seen used by Qakbot to avoid collision with other strains of malware
- '\cmd.exe'
- '\cscript.exe'
- '\curl.exe'
- '\mshta.exe'
- '\powershell.exe'
- '\pwsh.exe'
- '\wscript.exe'
Image|endswith: '\rundll32.exe'
CommandLine|contains:
# Note: Only add paths seen used by Qakbot to avoid collision with other strains of malware
- ':\ProgramData\'
- ':\Users\Public\'
- '\AppData\Local\Temp\'
- '\AppData\Roaming\'
selection_exports:
CommandLine|endswith:
# Note: Only add additional exports seen used by Qakbot
- 'aslr' # https://tria.ge/230524-scgq9add9v/behavioral1#report
- 'bind'
- 'DrawThemeIcon'
- 'GG10'
- 'GL70'
- 'jhbvygftr'
- 'kjhbhkjvydrt'
- 'LS88'
- 'Motd'
- 'N115'
- 'next' # https://tria.ge/230530-n3rxpahf9w/behavioral2
- 'Nikn'
- 'print'
- 'qqqb'
- 'qqqq'
- 'RS32'
- 'Test'
- 'Time'
- 'Updt'
- 'vips'
- 'Wind'
- 'WW50'
- 'X555'
- 'XL55'
- 'xlAutoOpen'
- 'XS88'
condition: all of selection_*False Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
References
MITRE ATT&CK
Other
detection.emerging-threats
Rule Metadata
Rule ID
339ed3d6-5490-46d0-96a7-8abe33078f58
Status
test
Level
critical
Type
Emerging Threat
Created
Wed May 24
Modified
Tue May 30
Path
rules-emerging-threats/2023/Malware/Qakbot/proc_creation_win_malware_qakbot_rundll32_exports.yml
Raw Tags
attack.defense-evasionattack.executiondetection.emerging-threats