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Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
24/04/2024, 04:44
Behavioral task
behavioral1
Sample
2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe
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Size
38KB
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MD5
d3ff08fd192e342ee350bfd8d8da5270
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SHA1
3a1dd5019eb77d4bbd94d7657bdaead74ae4e56b
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SHA256
a8af1ab2c8b1f438ccbfff89f08860f4f705da36cc247fb9eb1b5bccf4c1c2fc
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SHA512
b2b5b8c5f5e6d8086e0b28ffe54439dfb0cfac89dead72c82a83a3e42da020c0483bb64c26a596120972a0ee1eeab95fa19605484987039a1ab99f29be30cff4
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY91:qDdFJy3QMOtEvwDpjjWMl7T+
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral1/memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000c00000001225d-11.dat CryptoLocker_rule2 behavioral1/memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2716-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral1/memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000c00000001225d-11.dat CryptoLocker_set1 behavioral1/memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2716-25-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral1/memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000c00000001225d-11.dat UPX behavioral1/memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2716-25-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2716 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 1740 2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe -
resource yara_rule behavioral1/memory/1740-2-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000c00000001225d-11.dat upx behavioral1/memory/2716-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2716-25-0x0000000000500000-0x0000000000510000-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 1740 wrote to memory of 2716 1740 2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe 28 PID 1740 wrote to memory of 2716 1740 2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe 28 PID 1740 wrote to memory of 2716 1740 2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe 28 PID 1740 wrote to memory of 2716 1740 2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-24_d3ff08fd192e342ee350bfd8d8da5270_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1740 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2716
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD5d43d526dc5e173e5d68cf47899a2bcf4
SHA16b75c9482214c90a708b3ccb43c52c48156ff18d
SHA25604aa43222e0cf0cff720810ea103f16e5e9a800021da506729ff347a8c418fac
SHA51266ae15859bbd248a2ad85c0a4aed8b6ab619f3ce14e9e59369f138845bc0d0a62d200ba3778d40bed38e288a07528abe165a951b912cba751c0369c98b658b45