Analysis
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max time kernel
23s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
10/06/2024, 06:29
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe
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Size
44KB
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MD5
cd67531cb1e6243c47259271d3ba3b7c
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SHA1
802aab317ce9c1b53fcffd0eca77f3813087df49
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SHA256
f5cc4a283c19383da15c1a5a43c45d7b715394b56e54454cd12befce707e4d42
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SHA512
376f1d5f52065a1919e43e90f7988312a2f5af92ca9882a6bbc88a03629f4b232f78f04248810b6897233021ed1f76c976345652ec81be7063ed5aa94d2cf74b
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SSDEEP
768:bCDOw9UiaKHfjnD0S16avdrQFiLjJvtAHLT:bCDOw9aMDooc+vArT
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/848-0-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3932-18-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/memory/848-17-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00080000000233ce-16.dat CryptoLocker_rule2 behavioral2/memory/3932-27-0x0000000008000000-0x000000000800A000-memory.dmp CryptoLocker_rule2 -
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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation 2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3932 lossy.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 848 wrote to memory of 3932 848 2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe 82 PID 848 wrote to memory of 3932 848 2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe 82 PID 848 wrote to memory of 3932 848 2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-10_cd67531cb1e6243c47259271d3ba3b7c_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:848 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:3932
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
44KB
MD59f401f7505a756fa839a34ab484bdc38
SHA1e0143ab34c918f9c6a7b8defeec3d75c403d01bd
SHA2564a4e45c1de9c7725a25e5d76531cab26d850fb40936a786d574d82fd62e55d20
SHA512ed274148d18309e4e60310b9d9d887662db9bee2d66e76c0cd092710b4a9ae9a89d5b0d0e45d7cb0c50ccf51c83e5650413567d007ffaac412357e59ecf73fa8