Analysis
- max time kernel
93s - max time network
95s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
09/06/2024, 01:50
General
- Target d8b8d67e1e1701215bc6f7136a16fcf48ad210303dbf8ad5bd4b5bb24ecace52.exe
- Size 2.5MB
- Sample240609-b9d8ysbh2v
- SHA256 d8b8d67e1e1701215bc6f7136a16fcf48ad210303dbf8ad5bd4b5bb24ecace52
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\d8b8d67e1e1701215bc6f7136a16fcf48ad210303dbf8ad5bd4b5bb24ecace52.exe"C:\Users\Admin\AppData\Local\Temp\d8b8d67e1e1701215bc6f7136a16fcf48ad210303dbf8ad5bd4b5bb24ecace52.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\kat8B96.tmpC:\Users\Admin\AppData\Local\Temp\kat8B96.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
kat8B96.tmp
memory/1876-0-0x00000000023E0000-0x00000000023E1000-memory.dmp
memory/1876-2-0x00000000029E0000-0x0000000002B43000-memory.dmp
memory/1876-10-0x0000000000400000-0x000000000067A000-memory.dmp
memory/2356-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2356-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2356-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2356-13-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2356-14-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2356-17-0x000000001B7A0000-0x000000001B9FF000-memory.dmp
memory/2356-31-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2356-32-0x0000000000400000-0x0000000000648000-memory.dmp