Analysis
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max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
24-05-2024 04:13
Behavioral task
behavioral1
Sample
2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe
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Size
53KB
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MD5
f6d28fb77cccde9d5cc9a2dbb5cd805a
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SHA1
b234b36f27dc46c04b6587bfa50a797a13d7f08e
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SHA256
57f258d6f8f5c3f709d996701d34826a59b319e2791196ca9427bdf5a0e31730
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SHA512
1e78ac926161702af517dd41e95bd808eacffc2d7af1e75578c6fdf7ef47e5fb00ca5955e94424a513216155ca7f77d9e4199bebbc501a3f1baa91c030fb3f08
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SSDEEP
768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YY1J+OTOs:z6QFElP6n+gKmddpMOtEvwDpj31is
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1040-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/1040-14-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_rule2 behavioral1/memory/2476-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 behavioral1/memory/2476-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_rule2 -
Detection of Cryptolocker Samples 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1040-0-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/1040-14-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 \Users\Admin\AppData\Local\Temp\asih.exe CryptoLocker_set1 behavioral1/memory/2476-16-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 behavioral1/memory/2476-26-0x0000000000500000-0x0000000000510000-memory.dmp CryptoLocker_set1 -
UPX dump on OEP (original entry point) 5 IoCs
Processes:
resource yara_rule behavioral1/memory/1040-0-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/1040-14-0x0000000000500000-0x0000000000510000-memory.dmp UPX \Users\Admin\AppData\Local\Temp\asih.exe UPX behavioral1/memory/2476-16-0x0000000000500000-0x0000000000510000-memory.dmp UPX behavioral1/memory/2476-26-0x0000000000500000-0x0000000000510000-memory.dmp UPX -
Executes dropped EXE 1 IoCs
Processes:
asih.exepid process 2476 asih.exe -
Loads dropped DLL 1 IoCs
Processes:
2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exepid process 1040 2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe -
Processes:
resource yara_rule behavioral1/memory/1040-0-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/1040-14-0x0000000000500000-0x0000000000510000-memory.dmp upx \Users\Admin\AppData\Local\Temp\asih.exe upx behavioral1/memory/2476-16-0x0000000000500000-0x0000000000510000-memory.dmp upx behavioral1/memory/2476-26-0x0000000000500000-0x0000000000510000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 4 IoCs
Processes:
2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exedescription pid process target process PID 1040 wrote to memory of 2476 1040 2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe asih.exe PID 1040 wrote to memory of 2476 1040 2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe asih.exe PID 1040 wrote to memory of 2476 1040 2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe asih.exe PID 1040 wrote to memory of 2476 1040 2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe asih.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-24_f6d28fb77cccde9d5cc9a2dbb5cd805a_cryptolocker.exe"1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1040 -
C:\Users\Admin\AppData\Local\Temp\asih.exe"C:\Users\Admin\AppData\Local\Temp\asih.exe"2⤵
- Executes dropped EXE
PID:2476
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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\Users\Admin\AppData\Local\Temp\asih.exeFilesize
53KB
MD5fb61c1b31206b5b2ddc0a19a796b05f6
SHA1e6e754a3c8efd223fd896e49854a05019d899875
SHA256d9b70fb567221ab700cda1035f8e838181fff837405e82c555d300210ad2528d
SHA512401e417c56486adf885b5aa1e2398eee9e81dc013dc8b5965ec79b8b6f62afa3d6d03a71d1577faa659e09fcdd11b2ba415588965c1f53a913f648ea721f8f76
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memory/1040-0-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/1040-1-0x0000000000420000-0x0000000000426000-memory.dmpFilesize
24KB
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memory/1040-2-0x0000000000470000-0x0000000000476000-memory.dmpFilesize
24KB
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memory/1040-9-0x0000000000420000-0x0000000000426000-memory.dmpFilesize
24KB
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memory/1040-14-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2476-16-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB
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memory/2476-18-0x0000000001CA0000-0x0000000001CA6000-memory.dmpFilesize
24KB
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memory/2476-25-0x00000000004D0000-0x00000000004D6000-memory.dmpFilesize
24KB
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memory/2476-26-0x0000000000500000-0x0000000000510000-memory.dmpFilesize
64KB