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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
15/04/2024, 10:04
Behavioral task
behavioral1
Sample
2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe
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Size
78KB
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MD5
a49070c3b9de1c3bbc010535e195647e
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SHA1
c0e03b55072b1100b5aff63059e492a0f18b2fac
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SHA256
99b47830c57faa42e3b0bd98db002b0d4765ca5a74652d4290990bf6a16d20aa
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SHA512
e2bb4e416f3a89e3d9322aedd3b8d668a3b7bac4b65670226114aeba2276ad35b4c6d6af8efad672e6dab64d8bd2dcf88251a1ddb7f1461c2d76b5d5eec7daba
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOA+YSafiPuqI:T6a+rdOOtEvwDpjNcT
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x001c00000001e97e-13.dat CryptoLocker_rule2 behavioral2/memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2412-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x001c00000001e97e-13.dat CryptoLocker_set1 behavioral2/memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2412-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 4 IoCs
resource yara_rule behavioral2/memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x001c00000001e97e-13.dat UPX behavioral2/memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2412-26-0x0000000000500000-0x0000000000510000-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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation 2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2412 asih.exe -
resource yara_rule behavioral2/memory/4032-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x001c00000001e97e-13.dat upx behavioral2/memory/4032-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2412-26-0x0000000000500000-0x0000000000510000-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 4032 wrote to memory of 2412 4032 2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe 91 PID 4032 wrote to memory of 2412 4032 2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe 91 PID 4032 wrote to memory of 2412 4032 2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe 91
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-15_a49070c3b9de1c3bbc010535e195647e_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4032 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2412
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
78KB
MD50ed5022821ee282ceb88088af843e5f5
SHA19054edd017d4f17e50f53f22e9639e5c99f65690
SHA256c0c6d6820899b1969f497697af9d5668fef7977e175109aaeb818c95f87a23f3
SHA512ff53115454489cc0803c1ed209891749521a925a07fdc79c29359642dc1d2d47bd34de49075f763d6b401625dfd74ba10d7aa563c4c51e12447cc94a205907ef