Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
03-02-2024 03:37
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe
Resource
win10v2004-20231222-en
General
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Target
2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe
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Size
30KB
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MD5
6790a68c24de34392fe62919e92bfbf3
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SHA1
96fe87e7fb281c6f4dd089e235faa5e1ce075f7a
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SHA256
e252982aca933956cae6ba82b1cd1462bf7de0292eef778c75baeac3833ff824
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SHA512
7a4fb7dc8f5a062448f379bdf5b9c2f0bb6b8d764dd86df8df67c5b50be03a80e1b5e7124b09db3647aa57e331c54b40025c77bdd6007d0413be18fbcb4f06ac
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SSDEEP
768:q0ZziOWwULueOSdE8tOOtEvwDpjeWaJIOc+jHR:q0zizzOSxMOtEvwDpj/ar1R
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4580-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023217-13.dat CryptoLocker_rule2 behavioral2/memory/4860-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4580-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4860-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4860-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4580-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4860-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4580-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0007000000023217-13.dat UPX behavioral2/memory/4860-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4580-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4860-27-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3803511929-1339359695-2191195476-1000\Control Panel\International\Geo\Nation 2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4860 asih.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4580 wrote to memory of 4860 4580 2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe 85 PID 4580 wrote to memory of 4860 4580 2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe 85 PID 4580 wrote to memory of 4860 4580 2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-03_6790a68c24de34392fe62919e92bfbf3_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4580 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4860
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
30KB
MD5acdc82d8393448e8675fa6cf00388452
SHA1ced6b6b2fdc15d7a5646075a66c6fefc090bb698
SHA256491403e37370a4c52bf8598c2575562961d613b29197f611a762a8f0e72fdb4a
SHA51282235cda2ff9e4e445286d9dd55ece1a15bc6d280e76a11d561a53d41e141ba85786ed98c90f7d2a4ecbeabff8cef20ddb087c968aa881af1eb539b1dc0cffc0