Analysis
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max time kernel
121s -
max time network
121s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
28/04/2024, 03:55
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe
Resource
win7-20240215-en
Behavioral task
behavioral2
Sample
2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe
Resource
win10v2004-20240226-en
General
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Target
2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe
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Size
71KB
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MD5
d69d82d641b9fb248b9dd467b36810b1
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SHA1
120e4fb566137de4b0354f0cef7ad100218506f2
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SHA256
be6ff88b166ad01b22f39f36a65b40314bc64c8389e01d60cb196f5618398ebb
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SHA512
74be47b6de5e08ebebcb58751d349e939a66424d3a9ba9057492f45a76d93a693a20953d84fee42b7949c5d61715bcc2f9674889d34d9feef789f6502251f80f
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTA:ZhpAyazIlyazTA
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2796 CTS.exe -
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" 2024-04-28_d69d82d641b9fb248b9dd467b36810b1_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 2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2132 2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe Token: SeDebugPrivilege 2796 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2132 wrote to memory of 2796 2132 2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe 28 PID 2132 wrote to memory of 2796 2132 2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe 28 PID 2132 wrote to memory of 2796 2132 2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe 28 PID 2132 wrote to memory of 2796 2132 2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-28_d69d82d641b9fb248b9dd467b36810b1_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2132 -
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:2796
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD59f146db79908ce514538a02241f22c53
SHA18f8923ff52dd950124df1d774354ec84f8711c86
SHA25639e0994dde584edb97fc2c1812974df5a415ec8d51e19afd22c73eb5283b2199
SHA51291d0049e055c1212b01105eb1252138569b4d7c2297ad62fbdf62bf54e790452a6ef7860768d54782ab1cb3a3136d636f20d9da5ab3c659daaa7b4f2ffc7614f
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25