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Analysis
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max time kernel
146s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
11/04/2024, 07:53
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe
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Size
73KB
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MD5
dfc2e19058f25f970d2c02084e14e5fc
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SHA1
cea4909c114cffe8afd49508407077c5bf4896ca
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SHA256
a084c3bd9d7f6446e818a79880ac6dbdc7aad3675df2422fb7f9bddfe4c58c7a
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SHA512
6b6f6945c4a02739f0c38acd7dabfee417c52b26c90fc6893be903a72b3cbc1a898ac12ff9971471c8b3d231e6c62f79b4a17b8b9ea01d8f93ef38d417037c07
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SSDEEP
1536:X6QFElP6n+gJQMOtEvwDpjBZYTjipvF2bx1rHsu:X6a+SOtEvwDpjBZYvQd2F
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000002321b-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000700000002321b-12.dat 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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation 2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2204 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 3200 wrote to memory of 2204 3200 2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe 84 PID 3200 wrote to memory of 2204 3200 2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe 84 PID 3200 wrote to memory of 2204 3200 2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-11_dfc2e19058f25f970d2c02084e14e5fc_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3200 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2204
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
73KB
MD5262322ea7e9f7435840474f6d938b921
SHA1f1973f3e953a26c63032026528605b72ccab5bfb
SHA2566d2390b504c5bed0f51cb27dd53c6177f82a4633a42a53f91a4370d6169c9dbb
SHA5123912cb522c991aa0f30c9f138fc73bdb1794c856990f05fd8e7d3a8b23246fc075d7cc45cc5ea9dc50e1e0bb8faad19eb6598558d000e92cf8dd909f0822ed54