Analysis
-
max time kernel
145s -
max time network
147s -
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 17:32
Behavioral task
behavioral1
Sample
2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe
Resource
win7-20231215-en
General
-
Target
2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe
-
Size
77KB
-
MD5
862fb7858e5217ad87827bb6960c81e2
-
SHA1
923405e570b8fa5c84ea79a3b118bd3e2d53cce0
-
SHA256
e2090f410d4cca626001c53199a367bb00d12fcfbcd48722f806f5cdd5f62255
-
SHA512
3bcb49fe3bfc547d7f7f0fa65c866e83b0d44ebabead165a13ac339b29af7e5441189878debdc23b96d27043c132296d79ed44cd189dd4b387270ef8f272d674
-
SSDEEP
1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Q5:zCsanOtEvwDpjd
Malware Config
Signatures
-
Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/4148-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\misid.exe CryptoLocker_rule2 behavioral2/memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4148-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3484-55-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral2/memory/4148-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\misid.exe CryptoLocker_set1 behavioral2/memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4148-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3484-55-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/4148-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\misid.exe UPX behavioral2/memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4148-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3484-55-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exemisid.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation 2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-1168293393-3419776239-306423207-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
Processes:
misid.exepid process 3484 misid.exe -
Processes:
resource yara_rule behavioral2/memory/4148-0-0x0000000000500000-0x0000000000510000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\misid.exe upx behavioral2/memory/3484-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4148-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3484-55-0x0000000000500000-0x0000000000510000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious use of WriteProcessMemory 3 IoCs
Processes:
2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exedescription pid process target process PID 4148 wrote to memory of 3484 4148 2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe misid.exe PID 4148 wrote to memory of 3484 4148 2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe misid.exe PID 4148 wrote to memory of 3484 4148 2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe misid.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_862fb7858e5217ad87827bb6960c81e2_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4148 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:3484
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
77KB
MD56401654b2b89b9be078e81f70a936c57
SHA138c12f94305530d1b2b6dcbac48256758b11af3a
SHA2569616e2cf396283d3d3877c2f28489fcbf5df3685ac906d862c643e37d9e0e1d4
SHA512b138bfa3815705f064e051f8e006b54be4e213e2917a315ac71253bfe7d5cef4d88bbbbc1f894c6bc76667fed9587dd1f63db8f747da3caa4dc2d43871cd1a52