Analysis
- max time kernel
138s - max time network
146s - 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, 17:26
Static task
static1
3 signatures
Behavioral task
behavioral1
Sample
2024-01-25_3988b5e4f2fb15c93546addf5cd1b27c_cryptolocker.exe
Resource
win7-20231215-en
8 signatures
150 seconds
General
- Target 2024-01-25_3988b5e4f2fb15c93546addf5cd1b27c_cryptolocker.exe
- Size 47KB
- Sample240125-vzvbzabfa9
- SHA256 6e0d7d203cc3c2bcc882d65f9d4f2ba2fc8f8f6d834df5a04de014e8aa5103bf
- MD5 3988b5e4f2fb15c93546addf5cd1b27c
- SHA1 b0f3daf940f160b7a9e15f19f3bfd58bf1b80dba
- SHA512 5b637f75c19726bc149e1bda825d1c32d4e619d0e7df628bba1b07093e66ec840204c928e753142cf5ba68be4f11e27cd43fbf71d1a30a409394444fe2742ef4
- SSDEEP 384:icX+ni9VCr5nQI021q4VQBqURYp055TOtOOtEvwDpjqIGR/hHi7/OlI0G/3lQIqK:XS5nQJ24LR1bytOOtEvwDpjNbP/3lL
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Signatures
- Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4980-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0009000000022480-13.dat CryptoLocker_rule2 behavioral2/memory/4980-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3328-54-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 - Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/4980-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3328-54-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 - Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/4980-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0009000000022480-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/4980-17-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3328-54-0x0000000000500000-0x000000000050F000-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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 2024-01-25_3988b5e4f2fb15c93546addf5cd1b27c_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation misid.exe - Executes dropped EXE 1 IoCs
pid Process 3328 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 4980 wrote to memory of 3328 4980 2024-01-25_3988b5e4f2fb15c93546addf5cd1b27c_cryptolocker.exe 89 PID 4980 wrote to memory of 3328 4980 2024-01-25_3988b5e4f2fb15c93546addf5cd1b27c_cryptolocker.exe 89 PID 4980 wrote to memory of 3328 4980 2024-01-25_3988b5e4f2fb15c93546addf5cd1b27c_cryptolocker.exe 89
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-01-25_3988b5e4f2fb15c93546addf5cd1b27c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_3988b5e4f2fb15c93546addf5cd1b27c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4980 -
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:3328
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
- Path C:\Users\Admin\AppData\Local\Temp\misid.exe
- Size 47KB
- SHA256 a9a7ea91b5fbaeead4609bed6cf11c451099cb6d9e39662f3da647afa364e33e
- MD5 26004cbd7dd6505b08353f2252ae1258
- SHA1 1691237f5c737700cca8988ada84f3f007a574a1
- SHA512 0d3f288a96e4f2b896b52ee3a92d1955e2eecc1b5f638d23fd8ae3bc88232a2ef3ecade30fb7f07b687f7a17ac1b4871c40f150370a758f19b9f3fb6069b84b5
- SSDEEP 384:icX+ni9VCr5nQI021q4VQBqURYp055TOtOOtEvwDpjqIGR/hHi7/OlI0G/3lQIqd:XS5nQJ24LR1bytOOtEvwDpjNbP/3lI
- MD5 SHA1 SHA512 SSDEEP