Analysis
- max time kernel
145s - max time network
182s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
05/12/2022, 14:32
General
- Target 6474c38705ed24203c4f2c1386465b97.exe
- Size 1.2MB
- Sample221205-rwallshd33
- SHA256 538f828e062bb8200c9947698aa8d57281fb41df64e29bae5d148fc3b2983c36
Malware Config
Extracted
-
asyncrat
-
VenomRAT+HVNC+Stealer Version:5.0.8
-
Venom Clients
-
79.137.207.151:4449
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Venom_RAT_HVNC_Mutex_Venom RAT066840
-
delay
1
-
install
false
-
install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
- Async RAT payload 1 IoCs
- Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
- Looks for VMWare Tools registry key 2 TTPs 1 IoCs
- Checks BIOS information in registry 2 TTPs 2 IoCs
BIOS information is often read in order to detect sandboxing environments.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Maps connected drives based on registry 3 TTPs 2 IoCs
Disk information is often read in order to detect sandboxing environments.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\6474c38705ed24203c4f2c1386465b97.exe"C:\Users\Admin\AppData\Local\Temp\6474c38705ed24203c4f2c1386465b97.exe"1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sZXlqqpkmCl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp71DF.tmp"2⤵
- Creates scheduled task(s)
-
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"{path}"2⤵
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
tmp71DF.tmp
memory/2996-132-0x0000000000A60000-0x0000000000B9C000-memory.dmp
memory/2996-133-0x0000000005A60000-0x0000000006004000-memory.dmp
memory/2996-134-0x0000000005550000-0x00000000055E2000-memory.dmp
memory/2996-135-0x0000000005690000-0x000000000572C000-memory.dmp
memory/2996-136-0x00000000055F0000-0x00000000055FA000-memory.dmp
memory/2996-137-0x00000000010D0000-0x0000000001136000-memory.dmp
memory/4300-141-0x0000000000400000-0x0000000000416000-memory.dmp