Analysis
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max time kernel
152s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20240221-en -
resource tags
arch:x64arch:x86image:win10v2004-20240221-enlocale:en-usos:windows10-2004-x64system -
submitted
23/02/2024, 12:50
Static task
static1
Behavioral task
behavioral1
Sample
2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe
Resource
win10v2004-20240221-en
General
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Target
2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe
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Size
28KB
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MD5
92aa3dfa8691f919541fd84daea2717a
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SHA1
6fc306fbb727b0dca9690704586dd4e332fa2f94
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SHA256
4fc821f8e0fab3f4f3c9698a75cd2e92a098c1a8552e52297d7e4a5d32d6a8a4
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SHA512
2de4cc3f8f448fec138f84e5d9b23fded8a44c28bfed0d01b76155ca5cff4eae2f6f0482f82c57fb4ae9777bc82744b050f7143ba3c55650cd436bc2c2fb1658
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SSDEEP
384:bM7Q0pjC4GybxMv01d3AcASBQMf6i/zznum+UUA3:b/yC4GyNM01GuQMNXum+3A3
Malware Config
Signatures
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Detection of CryptoLocker Variants 1 IoCs
resource yara_rule behavioral2/files/0x000700000002310b-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-1-5-21-3844919115-497234255-166257750-1000\Control Panel\International\Geo\Nation 2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 3576 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 632 wrote to memory of 3576 632 2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe 86 PID 632 wrote to memory of 3576 632 2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe 86 PID 632 wrote to memory of 3576 632 2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-02-23_92aa3dfa8691f919541fd84daea2717a_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:632 -
C:\Users\Admin\AppData\Local\Temp\retln.exe"C:\Users\Admin\AppData\Local\Temp\retln.exe"2⤵
- Executes dropped EXE
PID:3576
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
28KB
MD5485c41fa1d2f63d1421170405104642b
SHA1c521545aa3b4aaffe42d499dbffc3b21760e966c
SHA256d982d00f1d89802c5bfe978550ccae63afff54faea5d4222ccd53d9171f6e8e9
SHA512a2caede05142b57b86cdf9ee54e6f660401b592729efaccba76085b090905035be8d9dd8bd33bdc795b7033d014f4199c0534844931ca185f63e0976d5cc25ba