Analysis
- max time kernel
133s - max time network
128s - platform
windows10-2004_x64 - resource
win10v2004-20240611-en - resource tags
- submitted
14/06/2024, 02:05
General
- Target df5fe65af1f6f93e6fa38aa46f53d3f6a17942cad637c450a61380d3024504db.exe
- Size 453KB
- Sample240614-chvmas1fjf
- SHA256 df5fe65af1f6f93e6fa38aa46f53d3f6a17942cad637c450a61380d3024504db
Malware Config
Extracted
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stealc
Extracted
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vidar
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https://t.me/memve4erin
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https://steamcommunity.com/profiles/76561199699680841
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user_agent
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0
Signatures
- Detect Vidar Stealer 13 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. 10 IoCs
- Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 10 IoCs
- Detects Windows executables referencing non-Windows User-Agents 13 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 10 IoCs
- Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 13 IoCs
- Detects executables containing potential Windows Defender anti-emulation checks 13 IoCs
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- 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 16 IoCs
- Suspicious use of WriteProcessMemory 21 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\df5fe65af1f6f93e6fa38aa46f53d3f6a17942cad637c450a61380d3024504db.exe"C:\Users\Admin\AppData\Local\Temp\df5fe65af1f6f93e6fa38aa46f53d3f6a17942cad637c450a61380d3024504db.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"2⤵
- Checks computer location settings
- 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 & rd /s /q "C:\ProgramData\FHCBGDAAFBKE" & 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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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 --field-trial-handle=1028,i,4778049104057176787,6631751660692402210,262144 --variations-seed-version --mojo-platform-channel-handle=3980 /prefetch:81⤵
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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 --field-trial-handle=3124,i,4778049104057176787,6631751660692402210,262144 --variations-seed-version --mojo-platform-channel-handle=4312 /prefetch:31⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
SCT Auditing Pending Reports
Sdch Dictionaries
memory/2188-0-0x0000000003220000-0x0000000003221000-memory.dmp
memory/3164-17-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-38-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-18-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-20-0x000000001B950000-0x000000001BBAF000-memory.dmp
memory/3164-28-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-29-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-37-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-5-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-54-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-3-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-61-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-75-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-76-0x0000000000400000-0x0000000000648000-memory.dmp
memory/3164-1-0x0000000000400000-0x0000000000648000-memory.dmp