Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
17-04-2024 03:44
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe
Resource
win7-20240319-en
Behavioral task
behavioral2
Sample
2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe
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Size
38KB
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MD5
599c093fc60f8ebfb2c83d2a8572ceeb
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SHA1
4273eab410a394ad051fdb4e159b151d4e64b008
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SHA256
7be442b58f7e3a44a8b40709e9cd8ee1f2ea55e1f6b2e4676baa157bdff38b66
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SHA512
25646caa75af4d9cd1bafec9b03e98a0a37f1e96f4ade96ef25116078146ba1c93278b5c8d4187f8b11181fc182841f4a048a09e9f90ecaee5b72f02c5090dbb
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SSDEEP
768:wHGGaSawqnwjRQ6ESlmFOsPoOdQtOOtEvwDpjm6WaJIOc+UPPEkLpz:YGzl5wjRQBBOsP1QMOtEvwDpjgarrkLN
Malware Config
Signatures
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Detection of CryptoLocker Variants 4 IoCs
resource yara_rule behavioral2/memory/4928-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x00090000000233fb-13.dat CryptoLocker_rule2 behavioral2/memory/4928-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 behavioral2/memory/2368-17-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 4 IoCs
resource yara_rule behavioral2/memory/4928-0-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/files/0x00090000000233fb-13.dat CryptoLocker_set1 behavioral2/memory/4928-18-0x0000000000500000-0x000000000050B000-memory.dmp CryptoLocker_set1 behavioral2/memory/2368-17-0x0000000000500000-0x000000000050B000-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-1-5-21-355664440-2199602304-1223909400-1000\Control Panel\International\Geo\Nation 2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 2368 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 4928 wrote to memory of 2368 4928 2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe 85 PID 4928 wrote to memory of 2368 4928 2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe 85 PID 4928 wrote to memory of 2368 4928 2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-17_599c093fc60f8ebfb2c83d2a8572ceeb_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4928 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2368
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
38KB
MD5f43e47cb24c5a6a2373498fd4b5029c4
SHA1207363e6fb45fea404ab860ec6db6cb46f29c0fb
SHA25639ef5b8db196b34b60f6e8dbef084d3e49b2202bbed6a36dd23f695da2181df7
SHA5129a2d727b3107c11aa5c90679e84fa490e0abe23d7fa4496d794c986a61a5bfb806e907c4a3ef8e2ac9fc96c6d35f71a183a47e83b5a5a73566d0728308782d98