Analysis
-
max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
31/05/2024, 15:53
Behavioral task
behavioral1
Sample
2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe
Resource
win10v2004-20240426-en
General
-
Target
2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe
-
Size
40KB
-
MD5
8a9f60e10293364644e5540dd74eb404
-
SHA1
f5fc87574e40a95b1f67ca7c2e22a8a295b24d32
-
SHA256
2610f1bcc56f972a6bd51658ce834900cb35ec468939b4ebc8c89acafb0ee825
-
SHA512
4c74b4607485695d6e5d3d451cd586be7295e63329eb649f458fbf626134ef78be19f18abeffa3af32914b4f772396214ce5c92c026beebb944db1d384f05547
-
SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan8Z1EC:qDdFJy3QMOtEvwDpjjWMl7Tdn8ZOC
Malware Config
Signatures
-
Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002329a-13.dat CryptoLocker_rule2 behavioral2/memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/940-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/940-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002329a-13.dat CryptoLocker_set1 behavioral2/memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/940-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/940-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000700000002329a-13.dat UPX behavioral2/memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/940-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/940-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation 2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 940 asih.exe -
resource yara_rule behavioral2/memory/3448-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000700000002329a-13.dat upx behavioral2/memory/3448-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/940-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/940-27-0x0000000000500000-0x0000000000510000-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 3448 wrote to memory of 940 3448 2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe 81 PID 3448 wrote to memory of 940 3448 2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe 81 PID 3448 wrote to memory of 940 3448 2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe 81
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-31_8a9f60e10293364644e5540dd74eb404_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3448 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:940
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
40KB
MD541bea78bdaad6da26c632d3303d4b97a
SHA174b15ba3388a60e8c44da12c59e8b45e303cf921
SHA2564124c4a289f21bce7e7d666307aee3846b83dbd3533d35288b1f016010d5f78e
SHA512d90f34412ff55ad13a8ee2ef4eee35af2c84490b37bc8b38e9232bb58505430daf39d642b87d1283704ed80de614c53477c06575306c1a61cc2266163f978dbe