Analysis
- max time kernel
143s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system - submitted
25/01/2024, 17:34
Static task
static1
4 signatures
Behavioral task
behavioral1
Sample
2024-01-25_a9d2346b879000d8683da1102604210e_cryptolocker.exe
Resource
win7-20231215-en
8 signatures
150 seconds
General
- Target 2024-01-25_a9d2346b879000d8683da1102604210e_cryptolocker.exe
- Size 40KB
- Sample240125-v5gcascffn
- SHA256 9428e9731d6599a663b3e02e4baa2ad00d2f764653bb39abbd40fc486bbbbfb5
- MD5 a9d2346b879000d8683da1102604210e
- SHA1 ce453f13f3568629cf2463a9e97bde3c7f109021
- SHA512 4fc97eeb25fa32dc9cd8e84fbf699f34459cf5543cff117486b6fe75925eda1d9c4790bec28073045e0c57fc66da03d578161d9fb20100083dec113b97fcfcc0
- SSDEEP 384:60VkMq01bJ3wtEwPS8HLEh+Jagz+3be+26aIIcVRYpetOOtEvwDpjqIGRmdHzOOo:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/G
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4896-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023135-13.dat CryptoLocker_rule2 behavioral2/memory/3836-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4896-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3836-53-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 - Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4896-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023135-13.dat CryptoLocker_set1 behavioral2/memory/3836-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/4896-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3836-53-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 - Detects executables built or packed with MPress PE compressor 5 IoCs
resource yara_rule behavioral2/memory/4896-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0008000000023135-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/3836-17-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/4896-18-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3836-53-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress - Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation 2024-01-25_a9d2346b879000d8683da1102604210e_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation misid.exe - Executes dropped EXE 1 IoCs
pid Process 3836 misid.exe - 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 4896 wrote to memory of 3836 4896 2024-01-25_a9d2346b879000d8683da1102604210e_cryptolocker.exe 88 PID 4896 wrote to memory of 3836 4896 2024-01-25_a9d2346b879000d8683da1102604210e_cryptolocker.exe 88 PID 4896 wrote to memory of 3836 4896 2024-01-25_a9d2346b879000d8683da1102604210e_cryptolocker.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-01-25_a9d2346b879000d8683da1102604210e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_a9d2346b879000d8683da1102604210e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4896 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
PID:3836
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\misid.exe
- Size 40KB
- SHA256 c015aba637a09e4c1c583ab410e6a5e42d9c9c88966bd1cff8189a6ec793ca2d
- MD5 8c27883a8a53828cedef515cb55d6299
- SHA1 9eaae0d5d5f3cc1ea4cdb4976ae44766f7656591
- SHA512 3346eeaab6c029e120c3b35399e89c781090b9f201fd6758cb49b9ac9607e747705365e6445a5bd1ef35ac2722a9400b7a01cd66d6e1feb5a0af40add3b3f4b7
- SSDEEP 384:60VkMq01bJ3wtEwPS8HLEh+Jagz+3be+26aIIcVRYpetOOtEvwDpjqIGRmdHzOO6:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqh6/s
- MD5 SHA1 SHA512 SSDEEP