Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
25-02-2024 06:40
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe
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Size
40KB
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MD5
c4d95b2dad5e054e8792667f8a0a29dd
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SHA1
d9a535b56d154f7556c82fec7a14ef70ad863258
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SHA256
4c9631ac3b186024f44e8a66bd46409b044bdb8ac650e2f3619dd0b04abeec97
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SHA512
f7aa1d5587111c83f7314f474513fe474c99d062df4a3357bdc93caab7d330d1be9d9b89d93997f20adbd61c4f7e969315518b4061e802711b4bc21440f6d230
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SSDEEP
768:TS5nQJ24LR7tOOtEvwDpjGqPhqlcnvhx5/xFRY/31:m5nkFNMOtEvwDpjG8hhXy/l
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1844-0-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00c300000001e848-13.dat CryptoLocker_rule2 behavioral2/memory/1844-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3444-26-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 2 IoCs
resource yara_rule behavioral2/memory/1844-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/memory/3444-26-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 -
Detects executables built or packed with MPress PE compressor 4 IoCs
resource yara_rule behavioral2/memory/1844-0-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/files/0x00c300000001e848-13.dat INDICATOR_EXE_Packed_MPress behavioral2/memory/1844-17-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress behavioral2/memory/3444-26-0x0000000000500000-0x000000000050E000-memory.dmp INDICATOR_EXE_Packed_MPress -
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-1-5-21-2132103209-3755304320-2959162027-1000\Control Panel\International\Geo\Nation 2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3444 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 1844 wrote to memory of 3444 1844 2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe 89 PID 1844 wrote to memory of 3444 1844 2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe 89 PID 1844 wrote to memory of 3444 1844 2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-25_c4d95b2dad5e054e8792667f8a0a29dd_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1844 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:3444
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD5e3ea87b4039663bc31863e40b5d46c4f
SHA1e4aa32c167249333a0e80c44370d7602ec510568
SHA2567a9dc1b11dbaf979d20886310f44c8ba32a1177862817ad649fc4ad6fac299a4
SHA512f0f2b3863dd03008726742a6f6307d65b13d6fe94c50e32be241a943a2a0b4e47ce60dd3b1a864f53b1b0ccaec570734a3f6761627c8688233a15ad463fe9f39