Analysis
- max time kernel
195s - max time network
298s - platform
windows10-1703_x64 - resource
win10-20240404-en - resource tags
- submitted
06/06/2024, 22:40
General
- Target 10ff1a950dbed879d1f0e421bd788ec51039dd530cb4a47e428e61c6ee791d93.exe
- Size 1.8MB
- Sample240606-2lpb5aeb52
- SHA256 10ff1a950dbed879d1f0e421bd788ec51039dd530cb4a47e428e61c6ee791d93
Malware Config
Extracted
-
stealc
Extracted
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vidar
-
https://t.me/r8z0l
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https://steamcommunity.com/profiles/76561199698764354
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0
Signatures
- Detect Vidar Stealer 11 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 1 IoCs
Processor information is often read in order to detect sandboxing environments.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\10ff1a950dbed879d1f0e421bd788ec51039dd530cb4a47e428e61c6ee791d93.exe"C:\Users\Admin\AppData\Local\Temp\10ff1a950dbed879d1f0e421bd788ec51039dd530cb4a47e428e61c6ee791d93.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat8C52.tmpC:\Users\Admin\AppData\Local\Temp\kat8C52.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\kat8C52.tmp" & rd /s /q "C:\ProgramData\AEBKECFCFBGC" & 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
kat8C52.tmp
memory/396-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-35-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-51-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-10-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-48-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-47-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-16-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-17-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-19-0x000000001B710000-0x000000001B96F000-memory.dmp
memory/396-34-0x0000000000400000-0x0000000000648000-memory.dmp
memory/396-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/4520-2-0x0000000003E60000-0x0000000003FAB000-memory.dmp
memory/4520-9-0x0000000000400000-0x00000000005C8000-memory.dmp
memory/4520-0-0x0000000000610000-0x0000000000611000-memory.dmp