Analysis
- max time kernel
142s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
25/05/2024, 22:52
General
- Target 6ebf361a51b9dd9db3b3bc71a1f1891748f6f3b89f1991ef06bc9a7a587c4ef9.exe
- Size 2.0MB
- Sample240525-2tlwzaeb35
- SHA256 6ebf361a51b9dd9db3b3bc71a1f1891748f6f3b89f1991ef06bc9a7a587c4ef9
Malware Config
Extracted
-
stealc
Extracted
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vidar
-
https://steamcommunity.com/profiles/76561199689717899
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https://t.me/copterwin
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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 15 IoCs
- Stealc
Stealc is an infostealer written in C++.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
- 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 12 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\6ebf361a51b9dd9db3b3bc71a1f1891748f6f3b89f1991ef06bc9a7a587c4ef9.exe"C:\Users\Admin\AppData\Local\Temp\6ebf361a51b9dd9db3b3bc71a1f1891748f6f3b89f1991ef06bc9a7a587c4ef9.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\kat2229.tmpC:\Users\Admin\AppData\Local\Temp\kat2229.tmp2⤵
- Checks computer location settings
- 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\kat2229.tmp" & rd /s /q "C:\ProgramData\AFBAKKFCBFHI" & 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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-
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --mojo-platform-channel-handle=3560 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:31⤵
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4220 --field-trial-handle=2264,i,15001568551143786084,90255922961447677,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
SCT Auditing Pending Reports
Sdch Dictionaries
kat2229.tmp
memory/2108-60-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-44-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-79-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-10-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-17-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-18-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-19-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-21-0x000000001DBF0000-0x000000001DE4F000-memory.dmp
memory/2108-36-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-9-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-53-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-4-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-73-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-71-0x0000000000400000-0x0000000000646000-memory.dmp
memory/2108-72-0x0000000000400000-0x0000000000646000-memory.dmp
memory/3868-0-0x0000000000730000-0x0000000000731000-memory.dmp
memory/3868-1-0x0000000004190000-0x00000000042D9000-memory.dmp
memory/3868-8-0x0000000000400000-0x000000000060C000-memory.dmp