Analysis
-
max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
23-05-2024 02:30
Behavioral task
behavioral1
Sample
2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe
Resource
win10v2004-20240426-en
General
-
Target
2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe
-
Size
39KB
-
MD5
597c68fe4ed9e4eb7051ef7454c0c89f
-
SHA1
5d2d84f50f6ee0384ab3c4477fb5588e767e15f0
-
SHA256
8a00bf228cb70de90eb382a239c24968e497cf79e6d965882ba9638ce87939fb
-
SHA512
17e631fbb58a81467c437e28d8dc2516782cec6b0448eeeb849f582c13b26f42a2045fb4a2734c4cd083ebde266b1329e5c98f0a1a0a018bd873d871868e784f
-
SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY/:qDdFJy3QMOtEvwDpjjWMl7T+
Malware Config
Signatures
-
Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral2/memory/3312-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5060-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/5060-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 C:\Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral2/memory/3312-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5060-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/5060-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral2/memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX C:\Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral2/memory/3312-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5060-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/5060-28-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation 2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 5060 asih.exe -
Processes:
resource yara_rule behavioral2/memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmp upx C:\Users\Admin\AppData\Local\Temp\asih.exe upx behavioral2/memory/3312-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5060-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/5060-28-0x0000000000500000-0x0000000000510000-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:
2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exedescription pid process target process PID 3312 wrote to memory of 5060 3312 2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe asih.exe PID 3312 wrote to memory of 5060 3312 2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe asih.exe PID 3312 wrote to memory of 5060 3312 2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe asih.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-23_597c68fe4ed9e4eb7051ef7454c0c89f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\asih.exeFilesize
39KB
MD5500ea9fa67d0101207fb51682328cf45
SHA1e3fbdba41f7c4aa2a2eaa2d4d9de9823e16fae6d
SHA2560fe738aca1f5f8434eae17521a19002f5bd9a02123666e5a6c15b1719433936d
SHA5120f822df0fcd3e0901d51348df2ba242b630e02a270083ce41bd4738705e5251926a47fac3e9a9b5685ffec847b37849811169b0b24838a2a45766e6ddf88e7ca
-
memory/3312-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
-
memory/3312-1-0x00000000006A0000-0x00000000006A6000-memory.dmpFilesize
24KB
-
memory/3312-2-0x0000000000750000-0x0000000000756000-memory.dmpFilesize
24KB
-
memory/3312-9-0x00000000006A0000-0x00000000006A6000-memory.dmpFilesize
24KB
-
memory/3312-18-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
-
memory/5060-19-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
-
memory/5060-21-0x00000000004F0000-0x00000000004F6000-memory.dmpFilesize
24KB
-
memory/5060-27-0x00000000004D0000-0x00000000004D6000-memory.dmpFilesize
24KB
-
memory/5060-28-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB