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Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
27/04/2024, 18:36
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe
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Size
85KB
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MD5
9ffa57fbb694f5a349108b914fa1dd31
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SHA1
a8934880729f30d774e4f0dbd22f1a12c69310f2
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SHA256
76887f812a06d66c103943b730ebc16d39f672071a1ecfaa573a01bdffef1935
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SHA512
4f9388477d4f043d17b6669962106351dd8ce8f9a26ec8e1d5f2d6fabdeb7df015d4a737a010cc5c6803d95e6b0dba3ea3179020d3de9bc217c30bc6f770fb43
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SSDEEP
1536:V6QFElP6n+gMQMOtEvwDpjyaLccVNl6aE:V6a+pOtEvwDpjvpw
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000d000000023b24-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x000d000000023b24-12.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-1-5-21-2860750803-256193626-1801997576-1000\Control Panel\International\Geo\Nation 2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2696 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 1348 wrote to memory of 2696 1348 2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe 83 PID 1348 wrote to memory of 2696 1348 2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe 83 PID 1348 wrote to memory of 2696 1348 2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-27_9ffa57fbb694f5a349108b914fa1dd31_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1348 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2696
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
85KB
MD510774d591b13fcec35d50f796e690369
SHA136fa7ab428242d7c3c8d2f38acf1c6fb240a7bb3
SHA256e970a821730fda84d0baa81b193df390ca48524d84ff64198028b955bd3ef7f2
SHA5127d1902aa5fbc7ac48e2006ae8ab490b415bbe0fd7937bb6cf37dd7941668d6f074bf6d80f76b553aff79042143af7a35b7fcc46e46f8ed33c1e3b0878379ff19