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Analysis
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max time kernel
148s -
max time network
154s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
20/04/2024, 15:47
Behavioral task
behavioral1
Sample
2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe
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Size
59KB
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MD5
d78a75df911cedf45c9b11d98bb0308f
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SHA1
74f2c8d1e1d23a3534c5a644c0fb0eb2cd20c8ee
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SHA256
2880853b3ea42a329d0beda269bfee3b5426d735a1566ad377c5cda5ddf22d3c
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SHA512
ce2d47a61a1c85a9844d096473c8adafb4b9f81d6819a330db62515efb4618c2fdcb7864083812ea784621c67e656784f4d522994e1c7334ae4bc5c311be3e95
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SSDEEP
768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5app1J7A:z6QFElP6n+gKmddpMOtEvwDpj9aYaz7A
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000300000001e97a-13.dat CryptoLocker_rule2 behavioral2/memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2680-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000300000001e97a-13.dat CryptoLocker_set1 behavioral2/memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/2680-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000300000001e97a-13.dat UPX behavioral2/memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/2680-27-0x0000000000500000-0x0000000000510000-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-1-5-21-2288054676-1871194608-3559553667-1000\Control Panel\International\Geo\Nation 2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2680 asih.exe -
resource yara_rule behavioral2/memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x000300000001e97a-13.dat upx behavioral2/memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/2680-27-0x0000000000500000-0x0000000000510000-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 384 wrote to memory of 2680 384 2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe 86 PID 384 wrote to memory of 2680 384 2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe 86 PID 384 wrote to memory of 2680 384 2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:384 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2680
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
59KB
MD5aa05f1d2bc2c874bf5e3f82bf3e43e82
SHA18ac825bc85a87d6e5ed3643ea840395b54ad08dd
SHA25678201df18644b3d9cdd0cf8cc1321aa409d65d26f16bd79bd98d991552097835
SHA512412242beb64a40c76a1f40cc39061f452457eaab734a9fdc32127642e0ff380007fd4d8b3aab2a0fbe2c91cb7a3d6fa73993e30aa347d439cecd29109884ace0