Analysis
- max time kernel
91s - max time network
99s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
26/05/2024, 14:57
General
- Target cf286f641da0451afc6ebb7a5d48f79f5bd72e716381a3f593b021237e19eea7.exe
- Size 2.0MB
- Sample240526-sb2d9sbb35
- SHA256 cf286f641da0451afc6ebb7a5d48f79f5bd72e716381a3f593b021237e19eea7
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://steamcommunity.com/profiles/76561199689717899
-
https://t.me/copterwin
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 8 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Suspicious use of SetThreadContext 1 IoCs
- Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\cf286f641da0451afc6ebb7a5d48f79f5bd72e716381a3f593b021237e19eea7.exe"C:\Users\Admin\AppData\Local\Temp\cf286f641da0451afc6ebb7a5d48f79f5bd72e716381a3f593b021237e19eea7.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat43B0.tmpC:\Users\Admin\AppData\Local\Temp\kat43B0.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
kat43B0.tmp
memory/3300-9-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3300-4-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3300-8-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3300-16-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3300-17-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3300-19-0x00000000193C0000-0x000000001961F000-memory.dmp
memory/3300-34-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3300-35-0x0000000000400000-0x0000000000646000-memory.dmp
memory/4720-0-0x00000000025B0000-0x00000000025B1000-memory.dmp
memory/4720-3-0x0000000004220000-0x0000000004369000-memory.dmp
memory/4720-10-0x0000000000400000-0x0000000000612000-memory.dmp