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Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
28/02/2024, 20:54
Behavioral task
behavioral1
Sample
2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe
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Size
72KB
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MD5
d9c5b06f4dcdc6fe536c383353d5e6ea
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SHA1
4f277fcc2abfe74d4060acdf8e6904ab75f9abd0
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SHA256
2f5c6938420563035036cab78fcf84985caaec087418f1e7fb58ec2b799ee08c
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SHA512
51e6e26e80a0ad558bcdf808edc77ff4dd63b4e93b641c607825b4f530981427d9c12209a8daa8b4c920579fe62562722b3e6d7a4048782aa6846c568b4acd64
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal8t:1nK6a+qdOOtEvwDpjn
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000001ebc7-13.dat CryptoLocker_rule2 behavioral2/memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000001ebc7-13.dat CryptoLocker_set1 behavioral2/memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x000700000001ebc7-13.dat UPX behavioral2/memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp UPX -
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-1-5-21-566096764-1992588923-1249862864-1000\Control Panel\International\Geo\Nation 2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2460 asih.exe -
resource yara_rule behavioral2/memory/952-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x000700000001ebc7-13.dat upx behavioral2/memory/952-18-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/2460-26-0x0000000000500000-0x000000000050F311-memory.dmp upx -
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 952 wrote to memory of 2460 952 2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe 89 PID 952 wrote to memory of 2460 952 2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe 89 PID 952 wrote to memory of 2460 952 2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe 89
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-28_d9c5b06f4dcdc6fe536c383353d5e6ea_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:952 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2460
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
72KB
MD5ea4ae3fd97b89a1229079e1fcd200853
SHA10676bdf7b126633b33abea48867cf9957a0cf618
SHA2561b22837dc434179c20d1d9ab9c6e878adf4a7ed8671cac605d119a114a3153b8
SHA512cc9b4c39708efd8fd17367b46e39d18470217085dc420aad389868060910398ba721851fff9081489844219286d61e988b9b00ef5e11378e4d193e7c90a542e6