Analysis
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max time kernel
150s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
12/06/2024, 17:12
Behavioral task
behavioral1
Sample
2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe
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Size
75KB
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MD5
8bcfade2d2d3208d3984e37bc9c9be41
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SHA1
d9baf4173bcba92c1c37be1ce459c30940efa6fc
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SHA256
5e635268296ac6a3b03e3b1d5997a6bd0fb30ccd6234c3cd9a0b19dc6fee0b99
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SHA512
6d23f9d99d52c1d90f4a7349f03f1259aa75c0892c7e90b0288f8a3c88b388298f5508f921e092f5729ee531a4ddbcbe10ea75eaefae0d1d6f2c26d969e120cc
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SSDEEP
1536:P8mnK6QFElP6n+gymddpMOtEvwDpjIHsal81Gcm:1nK6a+qdOOtEvwDpjc
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_rule2 behavioral2/memory/1076-16-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 behavioral2/memory/1464-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_set1 behavioral2/memory/1076-16-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 behavioral2/memory/1464-26-0x0000000000500000-0x000000000050F311-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/files/0x0008000000022f51-13.dat UPX behavioral2/memory/1076-16-0x0000000000500000-0x000000000050F311-memory.dmp UPX behavioral2/memory/1464-26-0x0000000000500000-0x000000000050F311-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 1464 asih.exe -
resource yara_rule behavioral2/memory/1076-0-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/files/0x0008000000022f51-13.dat upx behavioral2/memory/1076-16-0x0000000000500000-0x000000000050F311-memory.dmp upx behavioral2/memory/1464-26-0x0000000000500000-0x000000000050F311-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 1076 wrote to memory of 1464 1076 2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe 81 PID 1076 wrote to memory of 1464 1076 2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe 81 PID 1076 wrote to memory of 1464 1076 2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-12_8bcfade2d2d3208d3984e37bc9c9be41_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1076 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:1464
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
76KB
MD52b051555cfb66eb220d983685155453e
SHA19f1c9157314b9b5ead0fd7d9997f1d90f18741d0
SHA256342bcea57e9e918ad1b4a236e8b4b36020484b1fe47465c8651f33fb91eab150
SHA5123a3f1175a62e6ed45f9f9ca85cfce4a377d98cd997022ce324a0e9eb5356137ecfeef45bcd53de0c1d2321e54f4295782c0b5df035b746669c38fd6ba51f89d6