Analysis
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max time kernel
148s -
max time network
152s -
platform
windows7_x64 -
resource
win7-20231215-en -
resource tags
arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system -
submitted
25/01/2024, 10:28
Behavioral task
behavioral1
Sample
2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe
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Size
94KB
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MD5
b77b86f42ded510b3bb1d6d366408e33
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SHA1
1f5ab3788fee763b216a5ec70df96d139992011a
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SHA256
dd00866608d3473ef19cb3ca94908773cfced474ca7c4016e4ed688653ca845d
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SHA512
46547bd6e3461cdc0ba8b364d6dcc4cf067b70b0d0e01198110884f5e8051c5981008da0b9473f16a72dde9cfc276dc541a93e0376f3981e12c93715d91461b3
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01hT:AnBdOOtEvwDpj6z3
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2484-1-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2484-14-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x0009000000012258-11.dat CryptoLocker_rule2 behavioral1/memory/2752-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2752-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2484-1-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2484-14-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/files/0x0009000000012258-11.dat CryptoLocker_set1 behavioral1/memory/2752-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2752-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2484-1-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2484-14-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/files/0x0009000000012258-11.dat UPX behavioral1/memory/2752-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2752-27-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2752 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2484 2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe -
resource yara_rule behavioral1/memory/2484-1-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2484-14-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/files/0x0009000000012258-11.dat upx behavioral1/memory/2752-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2752-27-0x0000000000500000-0x000000000050F000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2484 wrote to memory of 2752 2484 2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe 28 PID 2484 wrote to memory of 2752 2484 2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe 28 PID 2484 wrote to memory of 2752 2484 2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe 28 PID 2484 wrote to memory of 2752 2484 2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2484 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2752
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
95KB
MD58f078c484cb52f485be68d8f4a6a7933
SHA18775b1aef6e0cfda5f1eb3173347ce73c3a27826
SHA2566e46dd835f9ba3d9ac97a59534d124443c77ffcc499d2c6f39c373af02d5a095
SHA5123954809303ddefed7d334f1fc517b65b883be3643bf39301d858bab51af2efc3364d9dc35eb35a9ed4599b03677133c6a4fd7eb60c94b56ef68641d94c1cd23e