Analysis
- max time kernel
143s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
22/04/2024, 18:36
General
- Target df1ecb1fc2d0480ef5a0e569543d14e9.exe
- Size 414KB
- Sample240422-w8wrtsef9v
- SHA256 136aff853514ca7aba662cc26bc54cfb92d58e6477752ce3a8948ff9f1117499
Malware Config
Signatures
- Stealc
Stealc is an infostealer written in C++.
- 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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\df1ecb1fc2d0480ef5a0e569543d14e9.exe"C:\Users\Admin\AppData\Local\Temp\df1ecb1fc2d0480ef5a0e569543d14e9.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\u2io.0.exe"C:\Users\Admin\AppData\Local\Temp\u2io.0.exe"2⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1892 -s 10643⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1892 -ip 18921⤵
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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=4160 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
u2io.0.exe
memory/1892-14-0x0000000002ED0000-0x0000000002FD0000-memory.dmp
memory/1892-15-0x0000000002EA0000-0x0000000002EC7000-memory.dmp
memory/1892-16-0x0000000000400000-0x0000000002C26000-memory.dmp
memory/1892-17-0x0000000000400000-0x0000000002C26000-memory.dmp
memory/3264-1-0x0000000002EE0000-0x0000000002FE0000-memory.dmp
memory/3264-2-0x00000000030E0000-0x000000000314E000-memory.dmp
memory/3264-3-0x0000000000400000-0x0000000002C4A000-memory.dmp
memory/3264-13-0x0000000000400000-0x0000000002C4A000-memory.dmp
memory/3264-20-0x0000000002EE0000-0x0000000002FE0000-memory.dmp
memory/3264-21-0x00000000030E0000-0x000000000314E000-memory.dmp