Analysis
- max time kernel
142s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system - submitted
25/01/2024, 15:42
Static task
static1
2 signatures
Behavioral task
behavioral1
Sample
2024-01-25_8d40ba89b33e329fb0ae3e9bbe3b00c3_cryptolocker.exe
Resource
win7-20231215-en
6 signatures
150 seconds
General
- Target 2024-01-25_8d40ba89b33e329fb0ae3e9bbe3b00c3_cryptolocker.exe
- Size 35KB
- Sample240125-s5cm1aahaj
- SHA256 2ebcf4f6960e5e8186c7310d9617a304dd67aa1e7d2fe022e14f81a8bf322889
- MD5 8d40ba89b33e329fb0ae3e9bbe3b00c3
- SHA1 61f3cec5cf20adc1d74d76767cd2813c300978ab
- SHA512 621935ca08f7ef95b24e2e005e977e4018a98e3a4b8d8d140789eb5e4f995e5eb3d989ded04e276ce3297681e527a7d5e3338781cb643945cca5e1d167f24944
- SSDEEP 384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiJXxXun19:btB9g/WItCSsAGjX7e9N0hunv
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00060000000231fa-12.dat CryptoLocker_rule2 - Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation 2024-01-25_8d40ba89b33e329fb0ae3e9bbe3b00c3_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation gewos.exe - Executes dropped EXE 1 IoCs
pid Process 4012 gewos.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 2004 wrote to memory of 4012 2004 2024-01-25_8d40ba89b33e329fb0ae3e9bbe3b00c3_cryptolocker.exe 88 PID 2004 wrote to memory of 4012 2004 2024-01-25_8d40ba89b33e329fb0ae3e9bbe3b00c3_cryptolocker.exe 88 PID 2004 wrote to memory of 4012 2004 2024-01-25_8d40ba89b33e329fb0ae3e9bbe3b00c3_cryptolocker.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-01-25_8d40ba89b33e329fb0ae3e9bbe3b00c3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_8d40ba89b33e329fb0ae3e9bbe3b00c3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2004 -
C:\Users\Admin\AppData\Local\Temp\gewos.exe"C:\Users\Admin\AppData\Local\Temp\gewos.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:4012
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\gewos.exe
- Size 35KB
- SHA256 821bf1101bb8f3e8ba67137be02a98a4d86460e54363fc650a42db588cebfc5a
- MD5 196f12a243a9d38b806db1d4b91aaab3
- SHA1 29972ec9a9e1f367441f0bd65ff4ceb4f82495be
- SHA512 713d32ced02248e56c92deca8f52d69b8e4cf64c039c36c77f768cc5b606466d475d349273154224da0e828f0ffc25307fda2e6806d1276ba640ba7af60eece5
- SSDEEP 384:btBYQg/WIEhUCSNyepEjYnDOAlzVol6U/zzo+tkq4XDIwNiJXxXun1i:btB9g/WItCSsAGjX7e9N0hunU
- MD5 SHA1 SHA512 SSDEEP