Analysis
-
max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
13-06-2024 02:52
Behavioral task
behavioral1
Sample
2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe
Resource
win10v2004-20240508-en
General
-
Target
2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe
-
Size
39KB
-
MD5
66eba98bbcb56bb7b5ca84bf44768da8
-
SHA1
27ecf956d75561aef3ad83435c10913801d0bdb0
-
SHA256
4c5992f4dd6efd13a97340ba09cc04d5443c8ab6f47f5d3f7f1ddd62c7f4709d
-
SHA512
b2a9abbe2da045806e18cda0c25f2ad2a5470305d6c7b135ad0add33799edc23e8cfd02136edc23dfcc344457f432e9a443c08016ef3d47909515ddc242d4cf2
-
SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan/Mk:qDdFJy3QMOtEvwDpjjWMl7Tdn/t
Malware Config
Signatures
-
Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00070000000232a4-13.dat CryptoLocker_rule2 behavioral2/memory/1180-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4156-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4156-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00070000000232a4-13.dat CryptoLocker_set1 behavioral2/memory/1180-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4156-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4156-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x00070000000232a4-13.dat UPX behavioral2/memory/1180-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4156-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4156-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation 2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4156 asih.exe -
resource yara_rule behavioral2/memory/1180-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x00070000000232a4-13.dat upx behavioral2/memory/1180-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4156-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4156-27-0x0000000000500000-0x0000000000510000-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 1180 wrote to memory of 4156 1180 2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe 81 PID 1180 wrote to memory of 4156 1180 2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe 81 PID 1180 wrote to memory of 4156 1180 2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe 81
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_66eba98bbcb56bb7b5ca84bf44768da8_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1180 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4156
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
39KB
MD57fd1c8e0b135ef4fa6a2a2004715af9c
SHA1f629bafd640fd8c56dce10eaa3b5266c021f857a
SHA2560385c43de34c02df12e4c8b10489ac61a3877b7c1e4f317499df674a2bdf8ae4
SHA5127d5ae13febb618d41a093ac03c2d4e18a21e464d0d541fd8c75ae0c33c8e3ed7276c3085c26eaa07f0deb63edd255846a30778afbcbaacc37167f090023edc0a