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Analysis
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max time kernel
148s -
max time network
148s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
18/02/2024, 14:47
Behavioral task
behavioral1
Sample
2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe
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Size
125KB
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MD5
cdfb7ef0c116dd9ec2409b337b56cee0
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SHA1
3946ab6c3169406bc7efa2e255c562bc125ce360
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SHA256
889abd290b440b07d6fbda9603893f221a04dbab168314f1a0798a3b63cfc934
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SHA512
bbdcdf65f0ce7dacb2e14bf1f9a0b33da8428eaeed37ad389341d438c104c4c20aefd8e2af60e55fd500ce560743ce71c662ac165de92bdfaabab930d87d453a
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp699GNtL1eU:AnBdOOtEvwDpj6za
Malware Config
Signatures
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Detection of CryptoLocker Variants 6 IoCs
resource yara_rule behavioral1/memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000d0000000122fa-11.dat CryptoLocker_rule2 behavioral1/memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1948-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 6 IoCs
resource yara_rule behavioral1/memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000d0000000122fa-11.dat CryptoLocker_set1 behavioral1/memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral1/memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp CryptoLocker_set1 behavioral1/memory/1948-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 6 IoCs
resource yara_rule behavioral1/memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/files/0x000d0000000122fa-11.dat UPX behavioral1/memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral1/memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp UPX behavioral1/memory/1948-27-0x0000000000500000-0x000000000050F000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 1948 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2316 2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe -
resource yara_rule behavioral1/memory/2316-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/files/0x000d0000000122fa-11.dat upx behavioral1/memory/2316-15-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/1948-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral1/memory/2316-12-0x00000000022E0000-0x00000000022EF000-memory.dmp upx behavioral1/memory/1948-27-0x0000000000500000-0x000000000050F000-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 2316 wrote to memory of 1948 2316 2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe 28 PID 2316 wrote to memory of 1948 2316 2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe 28 PID 2316 wrote to memory of 1948 2316 2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe 28 PID 2316 wrote to memory of 1948 2316 2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-18_cdfb7ef0c116dd9ec2409b337b56cee0_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2316 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1948
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
126KB
MD54397bb2d1f5dc633010daef9ce5e1edc
SHA1ce1ad5053d7325b49a7a67f385404c658d81cfb4
SHA256f91892f625deebacf6f97962397bd41bfc88015cc3e13d8bdf450b24246a995a
SHA5128cfb436a3caea64c4599742b585d8f4f6165a570f802724c1209cf917c5d4bfc06803568c77647cd2e35946867879d2fa3d166c27e82962d6daa17e58a03bb65