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Analysis
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max time kernel
149s -
max time network
152s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
20/03/2024, 02:54
Behavioral task
behavioral1
Sample
2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe
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Size
71KB
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MD5
97df09a134118f1371d9dc274f84bdfc
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SHA1
7dfdca384e32b0d5d0e77cb75648c2416da1578e
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SHA256
8f4d7e7d41ebb684db02fc3feb0403566a810136d97bb17bb87ca037464b1126
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SHA512
aeefbf93c3d61fe89eb41229494debd514caa46587031fc0398b4d9ebead915ef9be1751ba3348dc18a85ab3b042b76915d225b878af5e3a41ac3283e25c0461
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SSDEEP
1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBt:z6a+CdOOtEvwDpjQP
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral1/memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/files/0x000800000001222d-11.dat CryptoLocker_rule2 behavioral1/memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2540-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral1/memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/files/0x000800000001222d-11.dat CryptoLocker_set1 behavioral1/memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2540-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral1/memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/files/0x000800000001222d-11.dat UPX behavioral1/memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2540-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
pid Process 2540 asih.exe -
Loads dropped DLL 1 IoCs
pid Process 2484 2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe -
resource yara_rule behavioral1/memory/2484-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/files/0x000800000001222d-11.dat upx behavioral1/memory/2484-15-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2540-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2540-27-0x0000000000500000-0x0000000000510000-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 2484 wrote to memory of 2540 2484 2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe 28 PID 2484 wrote to memory of 2540 2484 2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe 28 PID 2484 wrote to memory of 2540 2484 2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe 28 PID 2484 wrote to memory of 2540 2484 2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-03-20_97df09a134118f1371d9dc274f84bdfc_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-03-20_97df09a134118f1371d9dc274f84bdfc_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:2540
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5b19374e363b2a0352eccaae740d4a88d
SHA1b84b4a9a02ecf57df374dbd5687cdfba17cc0c61
SHA2561ed4e2d055dcb5c7d881804af21bd819db1bd5dd6b8400e002bcd163305e2767
SHA512aaf7b6dd274e710afdb071d7715b7963502b4d4e51e50434697fe3763dad50d1775f1acf12a2bea18edaa48983649dadef55e3510782ea2cf70c2a336d3c4a07