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Analysis
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max time kernel
14s -
max time network
19s -
platform
windows7_x64 -
resource
win7-20240704-en -
resource tags
arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system -
submitted
22/07/2024, 15:53
Static task
static1
Behavioral task
behavioral1
Sample
2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe
Resource
win10v2004-20240709-en
General
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Target
2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe
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Size
172KB
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MD5
cbc833251bc03a569b83b78e268acd97
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SHA1
3e140a2f507bd8609fdd576075e29de792114ee4
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SHA256
7f781b930315bdfcbd1832feec7e2896fb1986498157d253895e5bd285d87373
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SHA512
319e733aa718bcf46cb59e85a46d318a596b3763dcaf7c32581acfe8c513a2451fb579edb9c55474a9bad3d09c8c8a22f2e919dcc1135c288cd7299dace71b56
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SSDEEP
3072:ZhpAyazIlyazTCKncoIhVA9xce4CLJaPQal7tn3P+Za4:hZMazbnhw+9xj1aYmWd
Malware Config
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1760 BlQXP4Z2bQM0uYe.exe 2444 CTS.exe 1352 Process not Found -
Loads dropped DLL 2 IoCs
pid Process 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 2704 Process not Found -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" CTS.exe -
Drops file in Windows directory 2 IoCs
description ioc Process File created C:\Windows\CTS.exe 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe Token: SeDebugPrivilege 2444 CTS.exe -
Suspicious use of WriteProcessMemory 8 IoCs
description pid Process procid_target PID 1972 wrote to memory of 1760 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 29 PID 1972 wrote to memory of 1760 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 29 PID 1972 wrote to memory of 1760 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 29 PID 1972 wrote to memory of 1760 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 29 PID 1972 wrote to memory of 2444 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 31 PID 1972 wrote to memory of 2444 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 31 PID 1972 wrote to memory of 2444 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 31 PID 1972 wrote to memory of 2444 1972 2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe 31
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-07-22_cbc833251bc03a569b83b78e268acd97_bkransomware.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1972 -
C:\Users\Admin\AppData\Local\Temp\BlQXP4Z2bQM0uYe.exeC:\Users\Admin\AppData\Local\Temp\BlQXP4Z2bQM0uYe.exe2⤵
- Executes dropped EXE
PID:1760
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C:\Windows\CTS.exe"C:\Windows\CTS.exe"2⤵
- Executes dropped EXE
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:2444
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
172KB
MD5b25d8a851e60950fdf945f3ce6dc4fdf
SHA1c62172f40dbf3cc9cff45cbd9a8f7df4fe66c4a0
SHA256758d866d297cd8c5e0975b6da78777ae620d9432aca291b5c78793bc1748e1cc
SHA512c66bf9d75b0e7d6fea7c267aa5f09884e7b4746bc2704b8ff476f349f54d51ad51c4e4efb49e4d3c168caee108c6d4bb871aef3d35287595c6235def563b730d
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
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Filesize
100KB
MD5db697c943fcb215f757f9c22c907c568
SHA1c57d891472f5ede8b1ee5d9bd6f5ad8fc8e9e5d7
SHA25607c96337729e3c4c986e8f5660a97cb475c4c04842606be2654b37892af57de9
SHA512bfa5c34d8c78015ccf96a2ef1c6d8f82157eb88680139bdbb51c55e3cd2a7c41bf364a364fd62b180b202cdf4f3d7d31c3710b8709c1d25a639bb00dfc97b646