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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
18/04/2024, 12:34
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe
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Size
60KB
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MD5
4ffdc9736ffaf21fae185069ae22f840
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SHA1
eb4a42df98c41f41601ce00e43c1e31db749f472
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SHA256
ff6c3ba44a85536e14d9a528421d2e512cb159c0102a2d84ad662c063128e678
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SHA512
bba849777abe4e85128e3f833528c783c1ae128bfffa98fa0ceb435957647dc2f489ee0c9893daa95f3a2473a73e64a1902adaabdec4818d020b49932ed4d3f1
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SSDEEP
768:3Uz7yVEhs9+Hs1SQtOOtEvwDpjO9+4hdCY8EQMjpi/Wpi3B3URiLqCyLuAx8XGP:3P+HsMQMOtEvwDpjoHy7B3g9CWuAxWM
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1228-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x001c00000001e97e-13.dat CryptoLocker_rule2 behavioral2/memory/1228-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2520-26-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1228-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x001c00000001e97e-13.dat CryptoLocker_set1 behavioral2/memory/1228-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/2520-26-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 -
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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation 2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2520 misid.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 1228 wrote to memory of 2520 1228 2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe 85 PID 1228 wrote to memory of 2520 1228 2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe 85 PID 1228 wrote to memory of 2520 1228 2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-18_4ffdc9736ffaf21fae185069ae22f840_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1228 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:2520
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
60KB
MD54a3956c5924c8f72ba1ad89d11a5e7f4
SHA188317e4d2fc98e6c3ef14b9813a82b81985b4dac
SHA2569ad3225827ccc4c858d97fb73cbfea0776e26a6fbdc028627e3500003aa33c24
SHA5127577126290717b1a0b072aeef0311ec7a3aa5acf354fa8fbd93dd2d46f73d910340adad8b67d1bbb28866a1cc76618c421517a4264882a743d013752b74f562f