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Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
28/02/2024, 17:23
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe
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Size
49KB
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MD5
6cfaf40a23ca9e43230efce139a13772
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SHA1
b69fbba2c49b876a81741e43126a723db37b73e7
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SHA256
1159c8afdc59951ac15c79c4784d270cab54af563aebb9eeaf5e12915c76d0db
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SHA512
c3ab1d74830e8a9cf1df9473ad2e07a5adff3c6810cc21dd21b7458ba373af2481a282fa8937e79a824505d2f0bb94b1a1d25cb02cbcbf858807e68c9f838fb9
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SSDEEP
768:XS5nQJ24LR1bytOOtEvwDpjNbP/0GeUMxI:i5nkFGMOtEvwDpjNbXdeUd
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/376-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023222-13.dat CryptoLocker_rule2 behavioral2/memory/376-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3160-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3160-53-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/376-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3160-53-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 5 IoCs
resource yara_rule behavioral2/memory/376-0-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x0007000000023222-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/376-18-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3160-17-0x0000000000500000-0x000000000050F000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3160-53-0x0000000000500000-0x000000000050F000-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-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation 2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe Key value queried \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\Control Panel\International\Geo\Nation misid.exe -
Executes dropped EXE 1 IoCs
pid Process 3160 misid.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 376 wrote to memory of 3160 376 2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe 90 PID 376 wrote to memory of 3160 376 2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe 90 PID 376 wrote to memory of 3160 376 2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-28_6cfaf40a23ca9e43230efce139a13772_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:376 -
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:3160
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
49KB
MD5581a2994d6898b133c2ca7b0339f7ac5
SHA185c9ea27e8f51e4687d04a4875d1e628d82b2b66
SHA256d29cb5c2728bc3bec6b9a927e950578c994ae9a071ce574c6e8e44128c09090e
SHA512c5936fbb80d0ef9231a89e828b37189ffe3a81f7a18891a8e931cdcf918df83abb16cbdfd2c58dcf6898224e3e2a3dac5deacbcf03e44b28071ed068ed7610c4