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
10/06/2024, 21:37
Behavioral task
behavioral1
Sample
2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe
Resource
win10v2004-20240426-en
General
-
Target
2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe
-
Size
80KB
-
MD5
a21c08c3ea498909e478defc9461c09d
-
SHA1
e2b80962de7e62689402c5fdb18dc82e4213856d
-
SHA256
cf7267048f58fa1be4bdcd8524efb028a1d5bf8cb85a311d553544a212b7de8c
-
SHA512
1de7472874b843cdf4ffba91a1bfb34e2c7177f1a4410769774bdb7f894720ed2f7aa59fb0ddb5e14d7947cdda3f42c0a2632f8c4c37b366f489fee97c434e0f
-
SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdJcRhD:T6a+rdOOtEvwDpjNtQ
Malware Config
Signatures
-
Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000600000002327c-13.dat CryptoLocker_rule2 behavioral2/memory/2844-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2344-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000600000002327c-13.dat CryptoLocker_set1 behavioral2/memory/2844-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2344-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000600000002327c-13.dat UPX behavioral2/memory/2844-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2344-26-0x0000000000500000-0x0000000000510000-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 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2344 asih.exe -
resource yara_rule behavioral2/memory/2844-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000600000002327c-13.dat upx behavioral2/memory/2844-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2344-26-0x0000000000500000-0x0000000000510000-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 2844 wrote to memory of 2344 2844 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe 81 PID 2844 wrote to memory of 2344 2844 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe 81 PID 2844 wrote to memory of 2344 2844 2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe 81
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_a21c08c3ea498909e478defc9461c09d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2844 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2344
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
80KB
MD5655e29d5362a718e0eaa02a2a6fec858
SHA1f0b089eb05447160f662afe3e50d1a0f0869f3f4
SHA256dda0ccf9063b5984ca800c0e6b412e40710dbe3a57c0a2a2e2a7a0cb9d9880e5
SHA51261515707ac70050b803d79585c69e4b085237f3bb7dff1725d80659d349ca43b9c49661b77700d490f02d498a15c20ba472f985b6249465ad791b4abd1fc73fa