Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 21:41
Behavioral task
behavioral1
Sample
2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe
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Size
40KB
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MD5
e0f17ee4360c34ee7c7bafd8080d956e
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SHA1
d2249578c4bacb7676bfe45160714e2e1d44ed28
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SHA256
f784f269cfc66250dce1ce50fc804144861151b2fbf9c260351b4841f42ae6de
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SHA512
9f1dcbae9068b94685fb41a33be79c423bbfc657e07f5f0a9f8798ba7ecf523354f878f722b56d831b7cf7b6a00fea5a25e15fda83a067aeb890f816154810c9
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYabDbX:qDdFJy3QMOtEvwDpjjWMl7Tdr
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1328-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_rule2 behavioral2/memory/1328-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4600-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1328-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_set1 behavioral2/memory/1328-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4600-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1328-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000022f51-13.dat UPX behavioral2/memory/1328-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4600-27-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4600 asih.exe -
resource yara_rule behavioral2/memory/1328-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000022f51-13.dat upx behavioral2/memory/1328-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4600-27-0x0000000000500000-0x0000000000510000-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 3 IoCs
description pid Process procid_target PID 1328 wrote to memory of 4600 1328 2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe 82 PID 1328 wrote to memory of 4600 1328 2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe 82 PID 1328 wrote to memory of 4600 1328 2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_e0f17ee4360c34ee7c7bafd8080d956e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1328 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4600
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD575aa511b8642ae23bff1fc3a22deac6e
SHA1a65c73a943296aa81b103f29093c3a81bed6a10d
SHA256e112fe4bae004918faf0efb5ae338aeaa536a8c5f358d857915d3ee1ed11559b
SHA512adfdf748beddb136d7007b453384eda1029f471b672ce75839c5b8b97859f7efa0be6679f4a58656606ea915a2b2c8784f0d1f6ed8184c6a2b7959aeeeb64c31