Analysis
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max time kernel
150s -
max time network
159s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
02/06/2024, 00:52
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe
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Size
43KB
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MD5
d5e694be19a9867676f26bf6a91c9385
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SHA1
d51f83208da881a3e83930af0c9e5c1d1b745d6b
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SHA256
38b6fd3c07d124506524e2a885baf8cbd8f625e0e37267a7e4fa30b132d38cda
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SHA512
14f0bfca93da249d7886d59a272029be12b33e38e9fd75bae6bacf13821a3a584f661b38d2d14b2994defb2d5058c1c51bed3bf069ed2679b604313936676c2c
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SSDEEP
768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAI:bCDOw9aMDooc+vAI
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3076-0-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c0000000233be-13.dat CryptoLocker_rule2 behavioral2/memory/860-17-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3076-18-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/860-27-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 -
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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 860 lossy.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 3076 wrote to memory of 860 3076 2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe 82 PID 3076 wrote to memory of 860 3076 2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe 82 PID 3076 wrote to memory of 860 3076 2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_d5e694be19a9867676f26bf6a91c9385_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3076 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:860
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
43KB
MD5b928327676574ade9802e08310744208
SHA1c51bf7259d5f7a1fe25f22acdd40af8554b668af
SHA2566ba95cc793c681a4ef51f5e2d2ab101031dd896ef9f3065f8e8c2b203846fb30
SHA51282b82a6ec4205f72813e24482bb724f8a56bea5e84452eb0b33569203f5c113741f647f86226704dd205dbe7c7a881934cc309f2048094dfe2a581469b142fdc