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Analysis
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max time kernel
150s -
max time network
146s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
17/05/2024, 01:25
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe
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Size
37KB
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MD5
7f028eaf61b90fa0fd23c0f5a7459f30
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SHA1
b63a13a8ff9f967d6adbbc278a73a7ca6394b34e
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SHA256
8ca79af7a5e61a7a72cd473ce3d77476214bf100b340b58cb0145a4191217e1e
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SHA512
aae32340c630f764a7df2e76f14eecce9f48d09850e68d978da7b0d816a7842abc589d6959dd655adcd4655cb96e3e5523c8c7aa2a8f66c9bfe0d36bceb8b7cd
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zzzcYgUPSznHzl6A0X/EIjxua6sY:b/yC4GyNM01GuQMNXw2PSjH+PPxAsY
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x00080000000233e9-12.dat 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-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4572 retln.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 4276 wrote to memory of 4572 4276 2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe 82 PID 4276 wrote to memory of 4572 4276 2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe 82 PID 4276 wrote to memory of 4572 4276 2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe 82
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-17_7f028eaf61b90fa0fd23c0f5a7459f30_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4276 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:4572
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
37KB
MD578dbdbf9f3f4fb9dbddf367475c56bff
SHA170475eb35ffc13341dc43d4aac2de734d84c87c5
SHA25665d3624b9fb02eb5f934f9e9e12baed8a5b722f7f5da09b00079bbb6435260a8
SHA512a58c15d2b8d9f89b25c0eddebc7acb5f622830ed684c5431ff62cb019c7a52e68b1602de780bfff035d2f6349e8b901a1e9a436854e8b82b787237edfdb2ab44