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Analysis
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max time kernel
119s -
max time network
119s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
30/04/2024, 14:57
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe
Resource
win10v2004-20240419-en
General
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Target
2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe
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Size
71KB
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MD5
bdfe14e3540a1a5ee06ffcc28dc03b0c
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SHA1
2b66441e1b8993e79895f38aaf5f976047abf294
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SHA256
3abd39167a931d8abe0b77d73161a4b53407f183fcd0b94ac4cf0823e398b91c
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SHA512
ad58c503b7c342aa0df1224b84e275f8efbbeb0d9c09cfd87758a48b70a93f31044e44132411e9a9ef7f607456bef1382aaa3d171bbffc8c8248c8f2e61f4765
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT9:ZRpAyazIliazT9
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2184 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" 2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_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 2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1312 2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe Token: SeDebugPrivilege 2184 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 1312 wrote to memory of 2184 1312 2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe 28 PID 1312 wrote to memory of 2184 1312 2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe 28 PID 1312 wrote to memory of 2184 1312 2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe 28 PID 1312 wrote to memory of 2184 1312 2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-30_bdfe14e3540a1a5ee06ffcc28dc03b0c_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1312 -
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:2184
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD505b8c1ecfe5a116e29813d7cf5d1dea9
SHA11df59027e7826fed686f688219021f3d652fd154
SHA25647209fec98e1b896751e0d94fb402318371743a1340129fdb75082ad91aaa09a
SHA512d8b7f6e25be52d42e9b426961b1d6b7c4df58cf6d12495043cbd26f77f538f62987939bb0936906d4bb4f7fb85ccc9c776666e213ee3ba85d4153a4aaa447825
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432