Analysis
- max time kernel
150s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system - submitted
25/01/2024, 17:33
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2024-01-25_9b5c4613dc241dfa68ecfa73cc7cf1d3_cryptolocker.exe
Resource
win7-20231215-en
5 signatures
150 seconds
General
- Target 2024-01-25_9b5c4613dc241dfa68ecfa73cc7cf1d3_cryptolocker.exe
- Size 46KB
- Sample240125-v47svscffj
- SHA256 e6d3aed6a3736cae8fc9dcf0840027917dadd03af9d53c32b0e3db7c023b9871
- MD5 9b5c4613dc241dfa68ecfa73cc7cf1d3
- SHA1 451cdcdf6cc49c744aca1e9ec85838fe08ec606f
- SHA512 399f1db43a91e46d878c1cb3b8586ec55d6b4a4eeadfeae6680c57070c147a092ee85c1568a32a40380b5c5c2cc9226b5d3f47efd0ca79223909f30c764e69d8
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDlC6JFbK37YbDu5z/hDJ:bgGYcA/53GAA6y37nbN
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00070000000231fa-12.dat CryptoLocker_rule2 - 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-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 2024-01-25_9b5c4613dc241dfa68ecfa73cc7cf1d3_cryptolocker.exe - Executes dropped EXE 1 IoCs
pid Process 3312 hasfj.exe - 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 4712 wrote to memory of 3312 4712 2024-01-25_9b5c4613dc241dfa68ecfa73cc7cf1d3_cryptolocker.exe 88 PID 4712 wrote to memory of 3312 4712 2024-01-25_9b5c4613dc241dfa68ecfa73cc7cf1d3_cryptolocker.exe 88 PID 4712 wrote to memory of 3312 4712 2024-01-25_9b5c4613dc241dfa68ecfa73cc7cf1d3_cryptolocker.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-01-25_9b5c4613dc241dfa68ecfa73cc7cf1d3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_9b5c4613dc241dfa68ecfa73cc7cf1d3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4712 -
C:\Users\Admin\AppData\Local\Temp\hasfj.exe"C:\Users\Admin\AppData\Local\Temp\hasfj.exe"2⤵
- Executes dropped EXE
PID:3312
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\hasfj.exe
- Size 46KB
- SHA256 760459c5a2a4f7ec497e6cfda15136d811a66104672690fd0d67f346dcbed6cf
- MD5 585ecf172e8b9efac582e4732d0911da
- SHA1 b3db62eecb985b0af6e5250dbf8e0d61e8e1cfdb
- SHA512 1fd88708884dff26982516c608555f316d8ec47320e00905e8a1b2b7458b62c679b1f334601aec5f256ba05dcc7fca03c75921fa23811047b911ff1386a938bc
- SSDEEP 768:bgX4zYcgTEu6QOaryfjqDlC6JFbK37YbDu5z/hD3:bgGYcA/53GAA6y37nbT
- MD5 SHA1 SHA512 SSDEEP