Analysis
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max time kernel
141s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
20/02/2024, 01:28
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe
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Size
41KB
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MD5
27f1144b13052c411fb61cc970376c3b
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SHA1
cd54c365c4c15a7caeb47bff8b020beea1729d4c
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SHA256
7f26de07176f6ab04a45252cc78849ed641dc15c91078fda7b00768b701262d8
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SHA512
bd961db74afce5e7adf07584c845b1f0aa772a84d7b6370fed96306f969985739efff65e6d37d789d9977488854c791004e1578848d8690a85075e8e7079c7cd
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SSDEEP
384:e/4wODQkzonAYsju5N/surDQtOOtEvwDpjqIGROqS/Wcz0BVFHxzV:79inqyNR/QtOOtEvwDpjBKcmfxB
Malware Config
Signatures
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Detection of CryptoLocker Variants 3 IoCs
resource yara_rule behavioral2/memory/2968-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0006000000023228-13.dat CryptoLocker_rule2 behavioral2/memory/2968-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/2968-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0006000000023228-13.dat CryptoLocker_set1 behavioral2/memory/2968-17-0x0000000000500000-0x000000000050F000-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-1-5-21-2398549320-3657759451-817663969-1000\Control Panel\International\Geo\Nation 2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1824 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 2968 wrote to memory of 1824 2968 2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe 82 PID 2968 wrote to memory of 1824 2968 2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe 82 PID 2968 wrote to memory of 1824 2968 2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-20_27f1144b13052c411fb61cc970376c3b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2968 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1824
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
41KB
MD58151b3e3a1c9c1918e54d17b02081fa7
SHA1e8bcb25f41f3ddbec64db7f9c5e0400cd5e58840
SHA2565e9d87fb6f259f0a8469130c7cdd7648c33ef4810f5fbfde1c47092ad4ae9ee0
SHA51264b0c46faad794ac434737fb66f7304f632c73ba4fc7ec42c2803c632d20a18276d0bee2cfc950f51ac7a5e4a61bdc9398efbb35c452c90534b65b5aaa9a05da