Analysis
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max time kernel
149s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
29-01-2024 04:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe
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Size
45KB
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MD5
b4d14620986d630461c64baec6f3406d
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SHA1
46d0b7bb9b33db4bde8552751c4c5fcea7127725
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SHA256
df210f8284a2f7d460c1c5f396b38eb4b8200b1271d3b74a7b072cea8f546974
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SHA512
af3e6958c66de788b69399a0e74cceeb952f91de1abbc79a911d5e0f91debfe085675a75bf29193e1be82aba4c64c87751a044a676af0a472861307c6c030bef
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SSDEEP
768:X6LsoEEeegiZPvEhHSG+gp/QtOOtEvwDpjBaaEqbIu556yPR/W:X6QFElP6n+gJQMOtEvwDpjB0GIWvPRe
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023207-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023207-12.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-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation 2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3280 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 2556 wrote to memory of 3280 2556 2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe 84 PID 2556 wrote to memory of 3280 2556 2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe 84 PID 2556 wrote to memory of 3280 2556 2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-01-29_b4d14620986d630461c64baec6f3406d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2556 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3280
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
45KB
MD552bd3270638356d548855919fc470a51
SHA1fdc3b6369c0d227d984c9752d46a01f0ce3c5c01
SHA256e5a7ea415b075bd28e36da4fc21a99c3f795b962d941b8124d52a347b55aa5d2
SHA512a8b121dfc4ed74ca3a1dabac9b5a8a4008efbfc3b588b837b222052be99a64bcd95d89a056e61e95fa54e3a38d420b127ccd7b30450611facf405680edaf00c8