Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 21:54
Behavioral task
behavioral1
Sample
4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe
Resource
win10v2004-20240426-en
General
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Target
4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe
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Size
80KB
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MD5
1b8540e5d69cd58496f21b6235cb5c4a
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SHA1
b5990def936d927b6b60fd41abe00e1d18729001
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SHA256
4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6
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SHA512
af80f33f4b97660f6dbc900696a8c4e739c3d6f66922a0dcdbe2e6db0beb313a3d4099759183a2978488eeafd68a405dc3cff4a2ea22347d3bc7f7ac1af18df6
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SSDEEP
1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBdxPUxB1yO:T6a+rdOOtEvwDpjNtHPg
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0007000000023288-13.dat CryptoLocker_rule2 behavioral2/memory/4908-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4908-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0007000000023288-13.dat CryptoLocker_set1 behavioral2/memory/4908-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/4908-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0007000000023288-13.dat UPX behavioral2/memory/4908-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/4908-27-0x0000000000500000-0x0000000000510000-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-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\International\Geo\Nation 4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe -
Executes dropped EXE 1 IoCs
pid Process 4908 asih.exe -
resource yara_rule behavioral2/memory/1960-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0007000000023288-13.dat upx behavioral2/memory/4908-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/1960-17-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/4908-27-0x0000000000500000-0x0000000000510000-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 1960 wrote to memory of 4908 1960 4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe 82 PID 1960 wrote to memory of 4908 1960 4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe 82 PID 1960 wrote to memory of 4908 1960 4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe"C:\Users\Admin\AppData\Local\Temp\4e56cf37c86eda556aa260fd11f073eadc9d13ced210d647700be5c6b7cfb6f6.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1960 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:4908
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
80KB
MD5dfd0660b9991935fd37380c38bb10067
SHA14704f02344aeb8ae9c88b30e5d1a25625d0c24f3
SHA256e3e8a3c5f99fbe95e93f1fbd2eb69e4100659393b5033ae2b332ace67f9ec934
SHA512640e29f74ce0514342a3a09180961c238764750e8b8530bac93f62ee38ce3c1311c0dbe474210fce842c6bc02c4394717e963f6eb7de1c509944cd2b8c136343