Analysis
- max time kernel
90s - max time network
92s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
09/06/2024, 01:56
General
- Target 7156eced6e11b462d4f1a3d6a55be4d68905c388d6be870c8e174b61ff30cdf1.exe
- Size 2.9MB
- Sample240609-ccw8yacf25
- SHA256 7156eced6e11b462d4f1a3d6a55be4d68905c388d6be870c8e174b61ff30cdf1
Malware Config
Extracted
-
stealc
Extracted
-
vidar
-
https://t.me/r8z0l
-
https://steamcommunity.com/profiles/76561199698764354
-
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.
- 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 7 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 4 IoCs
- Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 7 IoCs
- Detects executables containing potential Windows Defender anti-emulation checks 7 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\7156eced6e11b462d4f1a3d6a55be4d68905c388d6be870c8e174b61ff30cdf1.exe"C:\Users\Admin\AppData\Local\Temp\7156eced6e11b462d4f1a3d6a55be4d68905c388d6be870c8e174b61ff30cdf1.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat499C.tmpC:\Users\Admin\AppData\Local\Temp\kat499C.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
kat499C.tmp
memory/2572-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2572-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2572-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2572-13-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2572-14-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2572-16-0x000000001B7C0000-0x000000001BA1F000-memory.dmp
memory/2572-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2572-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4244-0-0x0000000002340000-0x0000000002341000-memory.dmp
memory/4244-1-0x0000000004170000-0x00000000042D6000-memory.dmp
memory/4244-10-0x0000000000400000-0x00000000006EF000-memory.dmp