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Analysis
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max time kernel
121s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20231129-en -
resource tags
arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system -
submitted
08/05/2024, 03:42
Static task
static1
Behavioral task
behavioral1
Sample
2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe
Resource
win7-20231129-en
Behavioral task
behavioral2
Sample
2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe
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Size
71KB
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MD5
04b8127757b255a0ddd8c439136249e2
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SHA1
f55213963df1a849291d52767a652148a6f07e0b
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SHA256
299169bc7a4687aa3fd1f1fbaa951b8a75229840ce61a06677234b5bda46817a
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SHA512
ac162a538746d479bf6e35e682ce2eb51ec57e529329ddf23ac4a67fbffd81f715d73c954577ccf480f1a1db14da84cd95999c6a0d8a31d1570d8131221db496
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT3m:ZRpAyazIliazT2
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2872 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" 2024-05-08_04b8127757b255a0ddd8c439136249e2_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 2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 3000 2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe Token: SeDebugPrivilege 2872 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 3000 wrote to memory of 2872 3000 2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe 28 PID 3000 wrote to memory of 2872 3000 2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe 28 PID 3000 wrote to memory of 2872 3000 2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe 28 PID 3000 wrote to memory of 2872 3000 2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-08_04b8127757b255a0ddd8c439136249e2_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3000 -
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:2872
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD5345cb786daa30cff1aaa27e650ddb7ec
SHA14522deb2f5e8a11468c26f9f55b1fe2b12bc414e
SHA256a6d06fb020f5d33c7a99d8bb8e56467659cd143b4ca93d3157495d07bd150bcb
SHA512b671e8afc21e8c444620079c09d951ad74bf4ed670e00f449111d7c1494a14445ed14beb6164f3c1a5080591b4d9fceff040f188050f26f7307074b7fd1e74a7
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432