Analysis
- max time kernel
159s - max time network
174s - platform
windows10-2004_x64 - resource
win10v2004-20220331-en - submitted
08/04/2022, 08:54
General
- Target ac8be183acf3079cd5475f8c170a98ae.exe
- Size 2.9MB
- Sample220408-ktwbzabaf2
- SHA256 c7ad74775251731d6ffc24878658341b5a3b3398a5480ab113f80af42eda32c3
Malware Config
Extracted
-
orcus
-
old
-
tools.3utilities.com:17650
-
3e72d23ec7f64b6aab470ad129f9a745
-
autostart_method
TaskScheduler
-
enable_keylogger
false
-
install_path
%programfiles%\vcredist\vcredistapp.exe
-
reconnect_delay
10000
-
registry_keyname
vcredistappreg
-
taskscheduler_taskname
vcredistappsch
-
watchdog_path
Temp\vcredistapp.exe
Extracted
-
44caliber
-
https://discord.com/api/webhooks/959366883545579581/Z1Be8qUrtXUbCZydkDEnV1VMcMYEDqpAE1fFmNhN26L5vd4nrcJOGi-iQnD-msZc-BJX
Signatures
- 44Caliber
An open source infostealer written in C#.
- Orcus
Orcus is a Remote Access Trojan that is being sold on underground forums.
- Orcurs Rat Executable 1 IoCs
- Executes dropped EXE 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ac8be183acf3079cd5475f8c170a98ae.exe"C:\Users\Admin\AppData\Local\Temp\ac8be183acf3079cd5475f8c170a98ae.exe"1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\libchrome.exe"C:\Users\Admin\AppData\Local\Temp\libchrome.exe"2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
libchrome.exe
libchrome.exe
memory/4216-139-0x00007FFDDB810000-0x00007FFDDC2D1000-memory.dmp
memory/4216-140-0x000000001BF90000-0x000000001BF92000-memory.dmp
memory/4216-138-0x0000000000620000-0x000000000066A000-memory.dmp
memory/4284-128-0x00000000072F0000-0x0000000007356000-memory.dmp
memory/4284-131-0x0000000007520000-0x000000000755C000-memory.dmp
memory/4284-132-0x0000000007700000-0x000000000780A000-memory.dmp
memory/4284-133-0x00000000080E0000-0x00000000082A2000-memory.dmp
memory/4284-134-0x00000000086B0000-0x0000000008700000-memory.dmp
memory/4284-130-0x00000000074C0000-0x00000000074D2000-memory.dmp
memory/4284-129-0x0000000007AC0000-0x00000000080D8000-memory.dmp
memory/4284-124-0x0000000000D10000-0x0000000001004000-memory.dmp
memory/4284-127-0x0000000006B60000-0x0000000006B6A000-memory.dmp
memory/4284-126-0x0000000005C30000-0x0000000005CC2000-memory.dmp
memory/4284-125-0x0000000006140000-0x00000000066E4000-memory.dmp