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
11/06/2024, 02:31
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe
Resource
win7-20240508-en
Behavioral task
behavioral2
Sample
2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe
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Size
86KB
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MD5
79eee3cf77bb96d9f8e4105834b46f0c
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SHA1
a8857dec46fcd2e9c30f5a906159b1c468f42954
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SHA256
638edf8d1b0defd4f6b53d71c4e4c8b53c605d988a2c810c87298a59bf3e659b
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SHA512
e887cc31fbcf04b4640639ccc20943beea926130ac9fd7d4f79d57085d9c1a69afbc962877029443859346ccf58b919ab06f01cc64151c95c896b461c9c22640
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SSDEEP
1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMrC+4:TCjsIOtEvwDpj5HE/OUHnSMa
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/4120-0-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000700000002328e-13.dat CryptoLocker_rule2 behavioral2/memory/4120-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2440-18-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2440-27-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
resource yara_rule behavioral2/memory/4120-0-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/files/0x000700000002328e-13.dat CryptoLocker_set1 behavioral2/memory/4120-17-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/memory/2440-18-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 behavioral2/memory/2440-27-0x0000000000500000-0x000000000050E000-memory.dmp CryptoLocker_set1 -
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-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation 2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2440 misid.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 4120 wrote to memory of 2440 4120 2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe 81 PID 4120 wrote to memory of 2440 4120 2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe 81 PID 4120 wrote to memory of 2440 4120 2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-11_79eee3cf77bb96d9f8e4105834b46f0c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4120 -
C:\Users\Admin\AppData\Local\Temp\misid.exe"C:\Users\Admin\AppData\Local\Temp\misid.exe"2⤵
- Executes dropped EXE
PID:2440
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
86KB
MD523425bbea873cfff0cc134c11c546966
SHA164b80127a205d333f6ac5703b95e8a57875a350f
SHA2560415aa0d9229d90b7ee5b6d5b75eea57a51dfdc4a8d0177099351a8487ad1895
SHA5128d051905e8021fc866405aafa23db5deb4f9a12d6cf6cdddb8fd91ec28d105130f2cacf2e4737c7ca79e45af9a4e4e69cf5f586ce1523792e86cf2e205b4b1a6