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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
28/05/2024, 15:36
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe
Resource
win10v2004-20240426-en
General
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Target
2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe
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Size
54KB
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MD5
81d81899174c5e9e5ff959ac5fbc1006
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SHA1
27a02e9db7d794948a893dea3a9b6e4d8be49d2a
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SHA256
3130faef8b360eb2f7a387465f8038cc30eaefbd0a868e654b2900b1b61e39af
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SHA512
27327b7cd6988f12b7c64606806de39846864d5630feee70074b3afcca398aa4e3a8f2b9c74202ca418ce6c13be0b99484debd309f87f0ac450c030a4ae29041
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SSDEEP
768:X6LsoEEeegiZPvEhHSG+gp/BtOOtEvwDpjBVaD3E09vxmlcaTI4:X6QFElP6n+gJBMOtEvwDpjBtExmlT
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023289-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x0007000000023289-12.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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation 2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4664 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 1688 wrote to memory of 4664 1688 2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe 84 PID 1688 wrote to memory of 4664 1688 2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe 84 PID 1688 wrote to memory of 4664 1688 2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-28_81d81899174c5e9e5ff959ac5fbc1006_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1688 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4664
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
54KB
MD5f261000c9cf3c6d5d459dc26ad5af4ce
SHA1592af5491de7b576a57e22e782410fa9234949dc
SHA2566977735ee979fdc0c211e33735a11a5a8fc109aefaf144cfee57421061cd847c
SHA5128f6edb202fbfbb81747a7a217eb27e498609a3e1fe4a328f1af0b3b41494bb0f382d08c136038f1830502e64b7916eb721991c3f65408738e269837157bccb1c