Analysis
- max time kernel
147s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
03/04/2024, 17:45
General
- Target e477e93ca61273c874dfa631dd02bd08317b2b214472c7fcaedf5fccc1bf6cfa.exe
- Size 289KB
- Sample240403-wbr3dagb5x
- SHA256 e477e93ca61273c874dfa631dd02bd08317b2b214472c7fcaedf5fccc1bf6cfa
Malware Config
Extracted
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stealc
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http://185.172.128.209
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url_path
/3cd2b41cbde8fc9c.php
Signatures
- Stealc
Stealc is an infostealer written in C++.
- Downloads MZ/PE file
- Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 2 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.
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Runs ping.exe 1 TTPs 1 IoCs
- Suspicious behavior: EnumeratesProcesses 16 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\e477e93ca61273c874dfa631dd02bd08317b2b214472c7fcaedf5fccc1bf6cfa.exe"C:\Users\Admin\AppData\Local\Temp\e477e93ca61273c874dfa631dd02bd08317b2b214472c7fcaedf5fccc1bf6cfa.exe"1⤵
- Checks computer location settings
- Loads dropped DLL
- 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 start "" "C:\Users\Admin\AppData\Local\Temp\JJKEBGHJKF.exe"2⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\JJKEBGHJKF.exe"C:\Users\Admin\AppData\Local\Temp\JJKEBGHJKF.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /C ping 2.2.2.2 -n 1 -w 3000 > Nul & Del C:\Users\Admin\AppData\Local\Temp\JJKEBGHJKF.exe4⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 2.2.2.2 -n 1 -w 30005⤵
- Runs ping.exe
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2056 -s 25762⤵
- Program crash
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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=3252 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:31⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2056 -ip 20561⤵
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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=1404 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Are.docx
mozglue.dll
nss3.dll
Network Persistent State
SCT Auditing Pending Reports
Sdch Dictionaries
JJKEBGHJKF.exe
memory/2056-101-0x0000000000400000-0x0000000000866000-memory.dmp
memory/2056-3-0x0000000000400000-0x0000000000866000-memory.dmp
memory/2056-4-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/2056-93-0x0000000000990000-0x0000000000A90000-memory.dmp
memory/2056-1-0x0000000000990000-0x0000000000A90000-memory.dmp
memory/2056-61-0x0000000000400000-0x0000000000866000-memory.dmp
memory/2056-102-0x00000000025B0000-0x00000000025D7000-memory.dmp
memory/2056-2-0x00000000025B0000-0x00000000025D7000-memory.dmp
memory/2844-94-0x0000000072210000-0x00000000729C0000-memory.dmp
memory/2844-100-0x00000000002B0000-0x00000000002D0000-memory.dmp
memory/2844-104-0x0000000004E70000-0x0000000004E80000-memory.dmp
memory/2844-107-0x0000000072210000-0x00000000729C0000-memory.dmp