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Analysis
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max time kernel
148s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
18/02/2024, 03:40
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe
Resource
win10v2004-20231215-en
General
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Target
2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe
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Size
56KB
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MD5
78c64c066f6fd9970e621fcd711fb14d
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SHA1
052a31768a32577598bfd40613b3babb50dfbcaf
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SHA256
4313bc195f4be8fe182eac6d101ba3befc66c2ee41aff0026c7e79e69004c66a
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SHA512
2df7cac6f4f2f80f55266b35b73ce8040fcaa44c1364a30357a5d3d32d0e2b1887071a5d17cb512402e2115cfe453a22eb9aeaef70b06f01cf0bd60ebd3a4d20
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SSDEEP
1536:qmbhXDmjr5MOtEvwDpj5cDtKkQZQRKb6105:BbdDmjr+OtEvwDpjMa
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4932-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002320d-13.dat CryptoLocker_rule2 behavioral2/memory/4932-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3508-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3508-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 3 IoCs
resource yara_rule behavioral2/memory/4932-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3508-18-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral2/memory/3508-27-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/4932-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/files/0x000700000002320d-13.dat UPX behavioral2/memory/4932-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3508-18-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral2/memory/3508-27-0x0000000000500000-0x0000000000510000-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-1-5-21-768304381-2824894965-3840216961-1000\Control Panel\International\Geo\Nation 2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3508 asih.exe -
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 4932 wrote to memory of 3508 4932 2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe 84 PID 4932 wrote to memory of 3508 4932 2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe 84 PID 4932 wrote to memory of 3508 4932 2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe 84
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-18_78c64c066f6fd9970e621fcd711fb14d_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4932 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:3508
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
56KB
MD5216cfcd08045565291082a79f59e1231
SHA15c01c0acce78adaafe2d6105abd6d02fee0bae80
SHA25624e5503868806616c778390569d86bd222b990b5ce7b78d680cb603013c07441
SHA51280989635c46886db90c24516950653cb78d20b74f9eebe27528a8a15f6a5a74c6bbef9599fbe453107eeb3fc8239881d467d5f1db8acf838e66ff794234c7cb4