Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
01/06/2024, 01:54
General
- Target da70adbf37b061fe069a137212e43767c78eb542b3f88e8c4489a3e0ced7c4db.exe
- Size 2.0MB
- Sample240601-cb2f9sdg6t
- SHA256 da70adbf37b061fe069a137212e43767c78eb542b3f88e8c4489a3e0ced7c4db
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/ta904ek
-
https://steamcommunity.com/profiles/76561199695752269
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 9 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Detect binaries embedding considerable number of MFA browser extension IDs. 4 IoCs
- Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 4 IoCs
- Detects Windows executables referencing non-Windows User-Agents 8 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 5 IoCs
- Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 8 IoCs
- Detects executables containing potential Windows Defender anti-emulation checks 8 IoCs
- 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\da70adbf37b061fe069a137212e43767c78eb542b3f88e8c4489a3e0ced7c4db.exe"C:\Users\Admin\AppData\Local\Temp\da70adbf37b061fe069a137212e43767c78eb542b3f88e8c4489a3e0ced7c4db.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat3C0F.tmpC:\Users\Admin\AppData\Local\Temp\kat3C0F.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat3C0F.tmp
memory/1296-7-0x0000000000400000-0x0000000000614000-memory.dmp
memory/1296-2-0x00000000041E0000-0x000000000432C000-memory.dmp
memory/1296-0-0x00000000023B0000-0x00000000023B1000-memory.dmp
memory/4572-10-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4572-9-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4572-4-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4572-24-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4572-25-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4572-26-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4572-28-0x0000000026020000-0x000000002627F000-memory.dmp
memory/4572-43-0x0000000000400000-0x0000000000649000-memory.dmp
memory/4572-44-0x0000000000400000-0x0000000000649000-memory.dmp