Analysis
-
max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 21:45
Behavioral task
behavioral1
Sample
2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe
Resource
win10v2004-20240508-en
General
-
Target
2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe
-
Size
54KB
-
MD5
fa380a76cceb9950a6d99b32c43a8ef0
-
SHA1
c4f042e606704e4adfae54ab0e5dd59c59613a94
-
SHA256
79b5755194e74f9ab5d0ced5faf07fe921f565ebcb8723c7557568e176772b0d
-
SHA512
ff6108a9d9738c2c6ff50fb0cdecf569acd984543b735af451acccf8b9128ce4f0ffac1dbfa9391821a234b6b1fd2d2670af716118582b0fc204b5ff2475f4ac
-
SSDEEP
768:bODOw9UiamWUB2preAr+OfjH/0S16avdrQFiLjJvtOXS:bODOw9acifAoc+v9
Malware Config
Signatures
-
Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4412-0-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000233d3-13.dat CryptoLocker_rule2 behavioral2/memory/4412-17-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1936-16-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1936-27-0x0000000008000000-0x000000000800F000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4412-0-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/files/0x00090000000233d3-13.dat UPX behavioral2/memory/4412-17-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/1936-16-0x0000000008000000-0x000000000800F000-memory.dmp UPX behavioral2/memory/1936-27-0x0000000008000000-0x000000000800F000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1936 lossy.exe -
resource yara_rule behavioral2/memory/4412-0-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/files/0x00090000000233d3-13.dat upx behavioral2/memory/4412-17-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/1936-16-0x0000000008000000-0x000000000800F000-memory.dmp upx behavioral2/memory/1936-27-0x0000000008000000-0x000000000800F000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4412 wrote to memory of 1936 4412 2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe 81 PID 4412 wrote to memory of 1936 4412 2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe 81 PID 4412 wrote to memory of 1936 4412 2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe 81
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_fa380a76cceb9950a6d99b32c43a8ef0_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4412 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:1936
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
54KB
MD52dd375eeb03202c8bcf947ffa8ba88c9
SHA15472e469a5835f4ba9f2ee8d92899687a57be5c0
SHA2564aee567c994c8ef96cd87ced07245c85e5d8da4e8833a4989a016d2f9e3392cb
SHA5120994d8cda11384498a85eadcdd09591043ae567105a49a3a694ce49db890ae8cfa6d3c4d87beafbe88122422faf6ee17b3aff78577b44b52076808bd2dca9469