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Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
19/02/2024, 15:55
Behavioral task
behavioral1
Sample
2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe
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Size
93KB
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MD5
bde4c220ef924e3755ffe1d9281cd31a
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SHA1
76c90546bb64cd9010014a6ce2e8a56e35ba6d53
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SHA256
009218b51dfc7cc3235c3f8a10cb74e2e29a2b134db83ab76fca109421fbf658
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SHA512
349f19fd49011f37768d6457319e79fe516cd34d6ef9097f7b07507ea2bc6fbcb94a10ed325dbdf06617a9a46246c8e6b703cb5691c28a5124d09849eb7f7776
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SSDEEP
1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpYM:AnBdOOtEvwDpj6ze
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4892-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000900000002321f-13.dat CryptoLocker_rule2 behavioral2/memory/3748-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4892-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3748-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4892-0-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000900000002321f-13.dat CryptoLocker_set1 behavioral2/memory/3748-18-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/4892-17-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 behavioral2/memory/3748-27-0x0000000000500000-0x000000000050F000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4892-0-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/files/0x000900000002321f-13.dat UPX behavioral2/memory/3748-18-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/4892-17-0x0000000000500000-0x000000000050F000-memory.dmp UPX behavioral2/memory/3748-27-0x0000000000500000-0x000000000050F000-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-1-5-21-1232405761-1209240240-3206092754-1000\Control Panel\International\Geo\Nation 2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3748 asih.exe -
resource yara_rule behavioral2/memory/4892-0-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/files/0x000900000002321f-13.dat upx behavioral2/memory/3748-18-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/4892-17-0x0000000000500000-0x000000000050F000-memory.dmp upx behavioral2/memory/3748-27-0x0000000000500000-0x000000000050F000-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 4892 wrote to memory of 3748 4892 2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe 86 PID 4892 wrote to memory of 3748 4892 2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe 86 PID 4892 wrote to memory of 3748 4892 2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-19_bde4c220ef924e3755ffe1d9281cd31a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4892 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3748
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
93KB
MD5ee06d11a9e11420f467c02b7f9ad7784
SHA1014e1339b5cc5405ca5e643863484e6824acc3cf
SHA256675098a01bee4d62beca2d41a48aea519f7327e354c036b9578244c636a8f118
SHA512c8cc6b6e285273ad9b09a298269a3cf5a8da6e4fd9be8dc934d26d90a1270d66e23e32cad62de56f6145525d44f8ab5d0b3a816a22ce39228c81cf6827d2871c