Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
13-06-2024 03:31
Behavioral task
behavioral1
Sample
2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe
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Size
40KB
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MD5
4716da0e36dd7220ba15f19456245e4d
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SHA1
6d22fb23b4dd24a6243d9c980b940988ac5c73b5
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SHA256
c1ee36d6bcdb22b7bdd3bc7aefba9d2bdf94cebe0b12f06e27e78a0ee9cd2134
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SHA512
d54ec1f175378b8e0d033a274290dcc4ffacff92134d1e6fd327870408044cd184a256c2278e63c2a10c6fa009b6ffa9962929b174214384e6a6a6a70abeb88d
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SSDEEP
768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYabDb20:qDdFJy3QMOtEvwDpjjWMl7TdV
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4720-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_rule2 behavioral2/memory/4720-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3228-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3228-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4720-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/files/0x0008000000022f51-13.dat CryptoLocker_set1 behavioral2/memory/4720-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3228-19-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3228-28-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4720-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x0008000000022f51-13.dat UPX behavioral2/memory/4720-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3228-19-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3228-28-0x0000000000500000-0x0000000000510000-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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3228 asih.exe -
resource yara_rule behavioral2/memory/4720-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/files/0x0008000000022f51-13.dat upx behavioral2/memory/4720-18-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3228-19-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral2/memory/3228-28-0x0000000000500000-0x0000000000510000-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 4720 wrote to memory of 3228 4720 2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe 82 PID 4720 wrote to memory of 3228 4720 2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe 82 PID 4720 wrote to memory of 3228 4720 2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-13_4716da0e36dd7220ba15f19456245e4d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4720 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3228
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
40KB
MD53b3859ae61535127d864a25dbcb849d1
SHA126b57962685e271d9d9747ffe581d0a4ea243a46
SHA25605c15cc886efa5f3a61f45742e53fe4c35948d1c3d58cadf54ecd68a4e31f16d
SHA512d580ec2f0783dd40dd74e4edb6e0681c60ec3855208c36c69cdb1c921759b0e471a61b604e925768dcdb68233e58d91d05a8e4679bc2b7802762d9587d4d8f91