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Analysis
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max time kernel
149s -
max time network
154s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
23/02/2024, 15:05
Behavioral task
behavioral1
Sample
2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe
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Size
71KB
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MD5
e4efb5b6b4049f7d7ae2aa05c3ed4046
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SHA1
02a8edc5ed2c90cab9114bf0c1552d6087e1b80a
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SHA256
bc044f4e17474b1cb0b282df07be31878bb4e0a2ce578210fc7edc222834253a
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SHA512
36dd4b5ab8e765485fc73653fc8e6a303ca1b07bcf8bf6a096ee7fd0943e593f75e4b7f39aeeee3bf2650278031e3265b1c45fec6399b8c313c3f8bb7095a192
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal3SQ:1nK6a+qdOOtEvwDpj8B
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/1280-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000b000000012241-11.dat CryptoLocker_rule2 behavioral1/memory/1280-15-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral1/memory/3040-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral1/memory/3040-28-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/1280-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral1/files/0x000b000000012241-11.dat CryptoLocker_set1 behavioral1/memory/1280-15-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral1/memory/3040-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral1/memory/3040-28-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/1280-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral1/files/0x000b000000012241-11.dat UPX behavioral1/memory/1280-15-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral1/memory/3040-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral1/memory/3040-28-0x0000000000500000-0x000000000050F311-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 3040 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 1280 2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe -
resource yara_rule behavioral1/memory/1280-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral1/files/0x000b000000012241-11.dat upx behavioral1/memory/1280-15-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral1/memory/3040-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral1/memory/3040-28-0x0000000000500000-0x000000000050F311-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 1280 wrote to memory of 3040 1280 2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe 28 PID 1280 wrote to memory of 3040 1280 2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe 28 PID 1280 wrote to memory of 3040 1280 2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe 28 PID 1280 wrote to memory of 3040 1280 2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_e4efb5b6b4049f7d7ae2aa05c3ed4046_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1280 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3040
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5c65640dfcafc5cba6d0f122774f81e81
SHA1b9f5036da54be9b81a0cfe999a1de5c755e6009d
SHA256c0de2096706c3cb9459a77db65ecef6b64c27db948c3971a489093139d4b8215
SHA5123e28aad7f565011cfc286fc560945baab04e56da1c8723a3373d87650a96b39f21020cde333676215c681d369979e084cd5473ba30da563d8b8f6003973419b6