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Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
29/02/2024, 01:57
Behavioral task
behavioral1
Sample
2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe
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Size
108KB
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MD5
eca5a409a32cafed02b31a86dfcfcb28
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SHA1
6efc91b5e76d82c2b23a3541f515e6d4c623077f
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SHA256
76079ed8cd2d845810cdbd37d0db94c54fd876ad35d32409449ca281c174712a
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SHA512
6d5421c4c9e853b9d649784623e203be5ac3c4cd5edf2f3ad2566600d79d371ee9564d491af3359363074573582de882c38336a1c929e5b62c7a8df97d4951bf
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsalRn5iF1j6GksgEneo:1nK6a+qdOOtEvwDpjD
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000400000001e980-13.dat CryptoLocker_rule2 behavioral2/memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/456-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x000400000001e980-13.dat CryptoLocker_set1 behavioral2/memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/456-27-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x000400000001e980-13.dat UPX behavioral2/memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/456-27-0x0000000000500000-0x000000000050F311-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-1-5-21-3270530367-132075249-2153716227-1000\Control Panel\International\Geo\Nation 2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 456 asih.exe -
resource yara_rule behavioral2/memory/884-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x000400000001e980-13.dat upx behavioral2/memory/884-17-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/456-18-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/456-27-0x0000000000500000-0x000000000050F311-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 3 IoCs
description pid Process procid_target PID 884 wrote to memory of 456 884 2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe 90 PID 884 wrote to memory of 456 884 2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe 90 PID 884 wrote to memory of 456 884 2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe 90
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-29_eca5a409a32cafed02b31a86dfcfcb28_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:884 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:456
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
109KB
MD51742905f22f91f34cde14f497d3e7978
SHA1f86e9b0fe758963e578c0028ff5677fdc6bb0896
SHA2568624ff6d7475152890f9a51a30387f598ca6962eb671c8caee9cefe3f31e5b50
SHA5124068440e6817d0f192a382ffae4d44a465a527408f06ea324d659a5a608420a6badf4bbb80fb89e414fb4c332d0644a9bf47d18348f136459e850097b28e381d