Analysis
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max time kernel
147s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
19-02-2024 07:47
Behavioral task
behavioral1
Sample
2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe
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Size
62KB
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MD5
66d88d5004e13543b96ecf092b1022ab
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SHA1
0f255c3274ead41d281748f2c541e211349e5dc6
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SHA256
f8b0c76dbe5c6db978f9ce6d772f74dad39a4a6e70a9b9319448cb1d3e5e365e
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SHA512
cc16f099575734336f1259ea6bde0119542733b2873c81afb5cda33a2a1f677982efce08185d8471f21f34cae6accfcbe54fb22e70a3b690098f30aec8bffc6b
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SSDEEP
768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mnVPr:zj+soPSMOtEvwDpj4kpmeLmn5
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000023155-13.dat CryptoLocker_rule2 behavioral2/memory/4276-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4276-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000023155-13.dat CryptoLocker_set1 behavioral2/memory/4276-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4276-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000023155-13.dat UPX behavioral2/memory/4276-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4276-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation 2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4276 misid.exe -
resource yara_rule behavioral2/memory/4728-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000023155-13.dat upx behavioral2/memory/4276-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4728-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4276-27-0x0000000000500000-0x0000000000510000-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 4728 wrote to memory of 4276 4728 2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe 86 PID 4728 wrote to memory of 4276 4728 2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe 86 PID 4728 wrote to memory of 4276 4728 2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-19_66d88d5004e13543b96ecf092b1022ab_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4728 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:4276
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
62KB
MD56161ee973365e16923668487a5771540
SHA1a71b765b7523c09adcbf67d57bfbbf7f1282cdf5
SHA256c8f87583cd2f410664b8f3ce7090d43caa574db6453ca7692538cb2de37050b8
SHA512467f122dbe20c53fa22881726849dbba923701054c3612d4530c0755b42116e27323536a6bd6e82b3ef5e03af742132f1e8447568300c5b2420f3c129255a876