Analysis
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max time kernel
118s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
27/05/2024, 14:39
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe
Resource
win10v2004-20240508-en
General
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Target
2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe
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Size
71KB
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MD5
ebb6b5964e08f55110d0af5306743b2b
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SHA1
d58928af79ee0562c30b80265921b768cb46d81f
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SHA256
7fea5bb76f83869740578da6b5c5e7255884e061c7a0a6279ee6c8abebf729e9
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SHA512
44de38a82d50d7cc0a938a826ae7d47b8ecf629542313bf63d599a399615daa56f12b3684bdf40737d8ba84a622aa6f56e86ff36704f34805a7b39c4d6566601
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT/:ZRpAyazIliazT/
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 1676 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" 2024-05-27_ebb6b5964e08f55110d0af5306743b2b_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 2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2332 2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe Token: SeDebugPrivilege 1676 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2332 wrote to memory of 1676 2332 2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe 28 PID 2332 wrote to memory of 1676 2332 2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe 28 PID 2332 wrote to memory of 1676 2332 2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe 28 PID 2332 wrote to memory of 1676 2332 2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-27_ebb6b5964e08f55110d0af5306743b2b_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2332 -
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:1676
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5dc7a5183a53f21a8fc2170c70c2b3dda
SHA1b7fd818e91336bf604c2fd40926d2a6fbf99c1d1
SHA256f5a76464983618eb675aed0018208ad1553728e67e8577c2d18959665b26df41
SHA512c95ff0590708d6d18d8e5873c64ebaa11a262aa5f0f6a44929d366a8005d980ceba4a33bfbdeca7ee04db8952bc3733085bd8d4e8c82a0d06fe0f7745c5052d6
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432