Analysis
- max time kernel
150s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
05/02/2026, 04:44
General
- Target 2026-02-05_08b661718f9d5ab2b040afc88edd473d_akira_cobalt-strike_quasar-rat.exe
- Size 4.2MB
- Sample260205-fdaccaft4a
- SHA256 4d84747ecc98fc8af895f41443745fd80260d49b22cea30980e166b8501ab7cb
Malware Config
Extracted
-
valleyrat_s2
-
1.0
-
47.84.16.249:6688
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127.0.0.1:80
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campaign_date
2026. 1.30
Signatures
- ValleyRat
ValleyRat stage2 is a backdoor written in C++.
- Valleyrat_s2 family
- Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Using powershell.exe command.
- Executes dropped EXE 2 IoCs
- Loads dropped DLL 1 IoCs
- Drops file in Windows directory 11 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 3 IoCs
- Modifies registry class 1 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of AdjustPrivilegeToken 64 IoCs
- Suspicious use of SetWindowsHookEx 5 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\2026-02-05_08b661718f9d5ab2b040afc88edd473d_akira_cobalt-strike_quasar-rat.exe"C:\Users\Admin\AppData\Local\Temp\2026-02-05_08b661718f9d5ab2b040afc88edd473d_akira_cobalt-strike_quasar-rat.exe"1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exe"cmd" /C start "" "C:\Windows\en-US\Tony_ US_500k_Diversified_Portfolio(2) (1).pptx"2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE"C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE" "C:\Windows\en-US\Tony_ US_500k_Diversified_Portfolio(2) (1).pptx" /ou ""3⤵
- Drops file in Windows directory
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
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-
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C:\Windows\en-US\WUDFHost.exe"C:\Windows\en-US\WUDFHost.exe"2⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\en-US\app-3.16.5\WUDFHost.exe"C:\Windows\en-US\app-3.16.5\WUDFHost.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\POWersHElL.exePOWersHElL.exe -ComMand "Add-MpPreference -ExclusionPath 'C:\Windows\en-US'"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\System32\WindowsPowerShell\v1.0\POWersHElL.exePOWersHElL.exe -NoProfile -Command "$taskName = 'MicrosoftEdgeUpdateHelpUpdates'; $programPath = 'C:\Windows\en-US\WUDFHost.exe'; $description = 'MicrosoftEdgeUpdateHelpUpdates'; $action = New-ScheduledTaskAction -Execute $programPath; $trigger = New-ScheduledTaskTrigger -AtLogOn; $currentUserName = [Environment]::UserName; $principal = New-ScheduledTaskPrincipal -UserId $currentUserName -LogonType Interactive -RunLevel Highest; $settings = New-ScheduledTaskSettingsSet; Register-ScheduledTask -TaskName $taskName -Action $action -Trigger $trigger -Principal $principal -Settings $settings -Description $description"4⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
POWersHElL.exe.log
StartupProfileData-NonInteractive
__PSScriptPolicyTest_wvw5cn3v.rjv.ps1
index.dat
d00655d2aa12ff6d.customDestinations-ms
d00655d2aa12ff6d.customDestinations-ms
Tony_ US_500k_Diversified_Portfolio(2) (1).pptx
WUDFHost.exe
WUDFHost.exe
service.exe.mui
memory/2220-54-0x0000026EDB400000-0x0000026EDB4B3000-memory.dmp
memory/2220-58-0x0000026EDB990000-0x0000026EDB9AA000-memory.dmp
memory/2220-61-0x0000026EDB980000-0x0000026EDB98A000-memory.dmp
memory/2220-60-0x0000026EDB970000-0x0000026EDB976000-memory.dmp
memory/2220-45-0x0000026EDB330000-0x0000026EDB352000-memory.dmp
memory/2220-53-0x0000026EDB3E0000-0x0000026EDB3FC000-memory.dmp
memory/2220-59-0x0000026EDB4E0000-0x0000026EDB4E8000-memory.dmp
memory/2220-55-0x0000026EDB4C0000-0x0000026EDB4CA000-memory.dmp
memory/2220-56-0x0000026EDB950000-0x0000026EDB96C000-memory.dmp
memory/2220-57-0x0000026EDB4D0000-0x0000026EDB4DA000-memory.dmp
memory/3688-16-0x00007FFA86E10000-0x00007FFA86E20000-memory.dmp
memory/3688-14-0x00007FFA86E10000-0x00007FFA86E20000-memory.dmp
memory/3688-23-0x00007FFA84BF0000-0x00007FFA84C00000-memory.dmp
memory/3688-20-0x00007FFA86E10000-0x00007FFA86E20000-memory.dmp
memory/3688-17-0x00007FFA86E10000-0x00007FFA86E20000-memory.dmp
memory/3688-15-0x00007FFA86E10000-0x00007FFA86E20000-memory.dmp
memory/3688-24-0x00007FFA84BF0000-0x00007FFA84C00000-memory.dmp
memory/4884-13-0x00007FF740D00000-0x00007FF741146000-memory.dmp
memory/4988-90-0x0000000180000000-0x0000000180038000-memory.dmp
memory/4988-87-0x0000000180000000-0x0000000180038000-memory.dmp
memory/4988-86-0x0000000180000000-0x0000000180038000-memory.dmp
memory/4988-89-0x0000000180000000-0x0000000180038000-memory.dmp
memory/4988-88-0x0000000180000000-0x0000000180038000-memory.dmp
memory/4988-79-0x0000000180000000-0x0000000180038000-memory.dmp