Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
26-05-2024 04:26
Behavioral task
behavioral1
Sample
2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe
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Size
90KB
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MD5
6bb2c0e8946fb6a65e72b25049ce1497
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SHA1
95cbb72cb3f45c4d7f1ddf5779de82c966d3d4a5
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SHA256
ae5b6978ad96f502a04ea64f94e228f0607955670733f9e9794d1e0eec1b03b3
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SHA512
8f426f668937f367c88cd228b0ee49c86ff82f96e8c7d31bf14eab6214e73df12c6d7493fbac7d28d395754ccb738cc15fda20af9485981115dfdeb199db85e4
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SSDEEP
1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAyJ:n6a+1SEOtEvwDpjYYvQd2Pg
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3924-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000600000002326f-13.dat CryptoLocker_rule2 behavioral2/memory/824-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3924-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/824-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/3924-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000600000002326f-13.dat CryptoLocker_set1 behavioral2/memory/824-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3924-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/824-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3924-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000600000002326f-13.dat UPX behavioral2/memory/824-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3924-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/824-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation 2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 824 asih.exe -
resource yara_rule behavioral2/memory/3924-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000600000002326f-13.dat upx behavioral2/memory/824-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3924-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/824-27-0x0000000000500000-0x0000000000510000-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 3924 wrote to memory of 824 3924 2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe 81 PID 3924 wrote to memory of 824 3924 2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe 81 PID 3924 wrote to memory of 824 3924 2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-26_6bb2c0e8946fb6a65e72b25049ce1497_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3924 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:824
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
90KB
MD56682adce728a988fb6f324532b300b4c
SHA1da222e8ed4ad99a36ca1d84ddaf9ea19e1f37614
SHA256105d1f619d01223cfa7d9c8350ef431196e986e5b8208fd2cbc122cdbb4ba516
SHA5129e4b71418f5a9af73761f148f18d68188dd9d729bd17f1ab641a86cc210910937200731b6d164d4192e36e999f7c578118d33561bb9487ba397474e272dde429