Analysis
- max time kernel
147s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
09/06/2024, 21:49
General
- Target a42e422e7751974e0839622c1ee46d08d777e892703252dee93ef11deb51ad7d.exe
- Size 2.4MB
- Sample240609-1pbd1aga63
- SHA256 a42e422e7751974e0839622c1ee46d08d777e892703252dee93ef11deb51ad7d
Malware Config
Extracted
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stealc
Extracted
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vidar
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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 13 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\a42e422e7751974e0839622c1ee46d08d777e892703252dee93ef11deb51ad7d.exe"C:\Users\Admin\AppData\Local\Temp\a42e422e7751974e0839622c1ee46d08d777e892703252dee93ef11deb51ad7d.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat5285.tmpC:\Users\Admin\AppData\Local\Temp\kat5285.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\kat5285.tmp" & rd /s /q "C:\ProgramData\GIEBGIIJDGHC" & 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
kat5285.tmp
memory/1476-25-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-43-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-4-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-8-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-73-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-9-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-72-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-42-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-28-0x00000000260A0000-0x00000000262FF000-memory.dmp
memory/1476-71-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-24-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-59-0x0000000000400000-0x0000000000648000-memory.dmp
memory/1476-60-0x0000000000400000-0x0000000000648000-memory.dmp
memory/2460-0-0x0000000000920000-0x0000000000921000-memory.dmp
memory/2460-1-0x00000000040F0000-0x0000000004253000-memory.dmp
memory/2460-10-0x0000000000400000-0x0000000000663000-memory.dmp