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Analysis
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max time kernel
148s -
max time network
155s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
10/04/2024, 22:33
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe
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Size
99KB
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MD5
c2ecd339d6dfdfebce9117cf2ccb76b4
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SHA1
08c88307ecc5c82a8b6bb0b1d21aa7f72f7b26f7
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SHA256
43fff992c887b335fa45223ea47aa37d58acb0314ff1ffa2586c21989cbbdfe8
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SHA512
8d6b77a4225532afeec60e467be14605b5586eba54d18fed227bf7484da0a7021c071bf5ebb2b7e328ebf5a6a6f5b62eee549746c6f0486fe125560b5b07f491
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SSDEEP
1536:26QFElP6n+gBQMOtEvwDpjQGYQbN/PKwNCWwh:26a+2OtEvwDpjtzm
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00080000000231f7-12.dat CryptoLocker_rule2 -
Detection of Cryptolocker Samples 1 IoCs
resource yara_rule behavioral2/files/0x00080000000231f7-12.dat 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-1-5-21-3045580317-3728985860-206385570-1000\Control Panel\International\Geo\Nation 2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 636 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 3788 wrote to memory of 636 3788 2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe 83 PID 3788 wrote to memory of 636 3788 2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe 83 PID 3788 wrote to memory of 636 3788 2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-10_c2ecd339d6dfdfebce9117cf2ccb76b4_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3788 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:636
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
100KB
MD563e90af4a8dca401fa876eb88dc6271a
SHA1e02079130cd6e52b535ca3c7d0414e2675666ca5
SHA2564a85b4e1fa2a7a82ce4ed0bab1dce512bd723d66234cde7320c5383ab13f24c1
SHA512724f8e34ad1bdcf2dcf941d00257869affbf5ad3d5f2b0cfd9e69e23ebf63b65469f8024c564abb5403c0ea046d56d2a52723d1a5d75c1b67fcff6fcd5446e4b