Analysis
- max time kernel
147s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20240611-en - resource tags
- submitted
29/06/2024, 02:11
General
- Target 98496aa5cf6b6ecc3f5f858e236eb15fdc029114f04c389c6bf601f962c8c9ae.exe
- Size 2.2MB
- Sample240629-cma4fsyejb
- SHA256 98496aa5cf6b6ecc3f5f858e236eb15fdc029114f04c389c6bf601f962c8c9ae
Malware Config
Extracted
-
vidar
-
https://t.me/g067n
-
https://steamcommunity.com/profiles/76561199707802586
-
user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0
Signatures
- Detect Vidar Stealer 16 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 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
- 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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 8 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\98496aa5cf6b6ecc3f5f858e236eb15fdc029114f04c389c6bf601f962c8c9ae.exe"C:\Users\Admin\AppData\Local\Temp\98496aa5cf6b6ecc3f5f858e236eb15fdc029114f04c389c6bf601f962c8c9ae.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat38E2.tmpC:\Users\Admin\AppData\Local\Temp\kat38E2.tmp2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat38E2.tmp" & rd /s /q "C:\ProgramData\BAKFBKEHDBGH" & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 104⤵
- Delays execution with timeout.exe
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
kat38E2.tmp
memory/3700-10-0x0000000000400000-0x0000000000635000-memory.dmp
memory/3700-2-0x0000000002BC0000-0x0000000002CD0000-memory.dmp
memory/3700-0-0x0000000002390000-0x0000000002391000-memory.dmp
memory/4960-35-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-36-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-27-0x0000000022760000-0x00000000229BF000-memory.dmp
memory/4960-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-44-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-45-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-61-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-62-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-73-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-74-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-75-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4960-78-0x0000000000400000-0x0000000000648000-memory.dmp