Analysis
-
max time kernel
150s -
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
10/06/2024, 21:36
Behavioral task
behavioral1
Sample
2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe
Resource
win10v2004-20240426-en
General
-
Target
2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe
-
Size
41KB
-
MD5
98768e8703a5b946d5548b8321c988fa
-
SHA1
ccd62b6ed2800c10dcb7eccf02e211bbdf8e0552
-
SHA256
451a4d4b2fa6f735b20ae8c90402b6b75446480756204509bb8e9d2456de3ae3
-
SHA512
2264fcd842e70c413a55a0cc8e4b28d82f9202828757e34aad223762d019ee869032d526a91d9dbff5f6d4bd4b980984faab121686a1f15cd93f174f50d8bdab
-
SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYljy:qDdFJy3QMOtEvwDpjjWMl7T6+
Malware Config
Signatures
-
Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0006000000023288-13.dat CryptoLocker_rule2 behavioral2/memory/4100-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1196-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1196-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0006000000023288-13.dat CryptoLocker_set1 behavioral2/memory/4100-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1196-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1196-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0006000000023288-13.dat UPX behavioral2/memory/4100-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1196-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1196-28-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation 2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1196 asih.exe -
resource yara_rule behavioral2/memory/4100-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0006000000023288-13.dat upx behavioral2/memory/4100-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1196-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1196-28-0x0000000000500000-0x0000000000510000-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 4100 wrote to memory of 1196 4100 2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe 80 PID 4100 wrote to memory of 1196 4100 2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe 80 PID 4100 wrote to memory of 1196 4100 2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe 80
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_98768e8703a5b946d5548b8321c988fa_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4100 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1196
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
42KB
MD5a9e9539b5dd5a344e4b7cee1819b7cc0
SHA142bf68294ee851bba68055db91e423e53c0f968a
SHA2562b43a49987b48a0fe7eb874ef5e59ab1c2645cfbcb9a83a4d4f1119ac1b8ad88
SHA512a101caeac621e7a50e2b636996e0ca148ff679d592fd102cc7c834057ab3ba6a995ebd8a1a8b9086ae566c68391086e516aa5987f656e414ffb31531f0766f59