Analysis
- max time kernel
137s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
11/05/2024, 01:32
General
- Target 320c9b7f61e1a20f89d2b4514d1545f0_JaffaCakes118.exe
- Size 485KB
- Sample240511-bx71hadf81
- SHA256 735cbb15792d8be93c653fd2febafc249e57b29faa25aaafb99b42b310bca104
Malware Config
Extracted
-
quasar
-
2.1.0.0
-
Office04
-
myconect.ddns.net:6606
-
VNM_MUTEX_8vaggmzqQMqTBMXSZ7
-
encryption_key
qRvtw4YHx2BDHavO4SeK
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Venom Client Startup
-
subdirectory
SubDir
Signatures
- Contains code to disable Windows Defender 2 IoCs
A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Drops desktop.ini file(s) 2 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Drops file in Windows directory 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 2 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\320c9b7f61e1a20f89d2b4514d1545f0_JaffaCakes118.exe"C:\Users\Admin\AppData\Local\Temp\320c9b7f61e1a20f89d2b4514d1545f0_JaffaCakes118.exe"1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\$77-Venom.exe"C:\Users\Admin\AppData\Roaming\$77-Venom.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exedw20.exe -x -s 11522⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
$77-Venom.exe
memory/320-25-0x0000000072420000-0x0000000072BD0000-memory.dmp
memory/320-30-0x00000000057E0000-0x00000000057F2000-memory.dmp
memory/320-34-0x0000000072420000-0x0000000072BD0000-memory.dmp
memory/320-17-0x000000007242E000-0x000000007242F000-memory.dmp
memory/320-18-0x0000000000B80000-0x0000000000C0C000-memory.dmp
memory/320-19-0x0000000005C30000-0x00000000061D4000-memory.dmp
memory/320-33-0x000000007242E000-0x000000007242F000-memory.dmp
memory/320-32-0x0000000006B60000-0x0000000006B6A000-memory.dmp
memory/320-22-0x00000000055D0000-0x0000000005662000-memory.dmp
memory/320-29-0x00000000056F0000-0x0000000005756000-memory.dmp
memory/320-31-0x0000000006880000-0x00000000068BC000-memory.dmp
memory/4056-0-0x00000000753A2000-0x00000000753A3000-memory.dmp
memory/4056-28-0x00000000753A0000-0x0000000075951000-memory.dmp
memory/4056-2-0x00000000753A0000-0x0000000075951000-memory.dmp
memory/4056-1-0x00000000753A0000-0x0000000075951000-memory.dmp