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
03/05/2024, 11:38
Behavioral task
behavioral1
Sample
2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe
Resource
win10v2004-20240426-en
General
-
Target
2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe
-
Size
38KB
-
MD5
b101b6f3541cc5cc4db53e1b27f094fd
-
SHA1
d0df3dfc75f5af36dde98229c163a072f28e4850
-
SHA256
36e41a9cfebdae8b8ba11002e09bc298010b6513bb95ba67f4ea52386c10000a
-
SHA512
7e79b6d44a8151d8dcc1abd67208a862390d7f9901ebf97471364f4beecec7f9e2ff474e8729da2f05924faa73719765f080c47e5bd582b4a02fc4c88e957808
-
SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8T:qDdFJy3QMOtEvwDpjjWMl7Tdn8T
Malware Config
Signatures
-
Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1060-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000233ce-13.dat CryptoLocker_rule2 behavioral2/memory/1060-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1756-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1060-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00090000000233ce-13.dat CryptoLocker_set1 behavioral2/memory/1060-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1756-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1060-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00090000000233ce-13.dat UPX behavioral2/memory/1060-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1756-28-0x0000000000500000-0x0000000000510000-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-1-5-21-540404634-651139247-2967210625-1000\Control Panel\International\Geo\Nation 2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1756 asih.exe -
resource yara_rule behavioral2/memory/1060-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00090000000233ce-13.dat upx behavioral2/memory/1060-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1756-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1756-28-0x0000000000500000-0x0000000000510000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1060 wrote to memory of 1756 1060 2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe 82 PID 1060 wrote to memory of 1756 1060 2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe 82 PID 1060 wrote to memory of 1756 1060 2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe 82
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-03_b101b6f3541cc5cc4db53e1b27f094fd_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1060 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1756
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
39KB
MD5ac146ef11919004852e0ad0288067a8a
SHA133e8319dddcf21b1db80edcda6dbe4ce55f72d15
SHA2565a10e50fba5fb39485e40ebdf1263843045e1c05cecfaae341cef98e15e46308
SHA5120c65b4496639b486b00326a2553512a189c3c21a5343285fa59059cece8ca4af01560271ea209d32e5230d816fb4053b0544111bc4c6270ecb5e61ded33db6d2