Analysis
- max time kernel
143s - max time network
155s - 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, 17:24
Static task
static1
3 signatures
Behavioral task
behavioral1
Sample
2024-01-25_23c9a9b3341332f20424508270cfeb91_cryptolocker.exe
Resource
win7-20231215-en
8 signatures
150 seconds
General
- Target 2024-01-25_23c9a9b3341332f20424508270cfeb91_cryptolocker.exe
- Size 100KB
- Sample240125-vytn2sbeh4
- SHA256 911fbfd9379eab63dacabff197e62febdc37f6f0878d42dd8070e9b64fe3c20f
- MD5 23c9a9b3341332f20424508270cfeb91
- SHA1 342ecdf4b09abf2ab701a4ec46c1789fdcf6c302
- SHA512 26c8595131406152f88893908b5e5a244787ef456345fa08799e536c3b8716177cdf7e9f4f3bef13f262a7d0b3a05a276614381180e358ad6cad8b6bbf370437
- SSDEEP 768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRiWjzUNojlEQ:i5nkFGMOtEvwDpjNbwQEIikgNyEQ
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1096-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023225-13.dat CryptoLocker_rule2 behavioral2/memory/1096-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1168-54-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 - Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/1096-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/1168-54-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 - Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/1096-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0007000000023225-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/1096-17-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/1168-54-0x0000000000500000-0x000000000050F000-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_23c9a9b3341332f20424508270cfeb91_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 1168 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 1096 wrote to memory of 1168 1096 2024-01-25_23c9a9b3341332f20424508270cfeb91_cryptolocker.exe 88 PID 1096 wrote to memory of 1168 1096 2024-01-25_23c9a9b3341332f20424508270cfeb91_cryptolocker.exe 88 PID 1096 wrote to memory of 1168 1096 2024-01-25_23c9a9b3341332f20424508270cfeb91_cryptolocker.exe 88
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-01-25_23c9a9b3341332f20424508270cfeb91_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_23c9a9b3341332f20424508270cfeb91_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1096 -
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:1168
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\misid.exe
- Size 100KB
- SHA256 b90b2c146129de55dcfcd6035f13aa0fbd1e30483409c5b7dc2473e91bba72d6
- MD5 235b7573d6b87e63a5c13fc02c92c9e2
- SHA1 a5eb7e601dc1b0acb0bca9a6eeb1146926e5fd2a
- SHA512 8e0b897bd256cdc94a3e5c9d48d6e05c8d4efcbee8a601ae06b93091f6e3791ea6aae819b4d7aa9b441542d0cc34263fb3abcbfe43a423342b099f61057a5371
- SSDEEP 768:XS5nQJ24LR1bytOOtEvwDpjNbZ7uyA36S7MpxRiWjzUNojlEP:i5nkFGMOtEvwDpjNbwQEIikgNyEP
- MD5 SHA1 SHA512 SSDEEP