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Analysis
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max time kernel
120s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
25/04/2024, 04:20
Static task
static1
Behavioral task
behavioral1
Sample
2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
Resource
win10v2004-20240412-en
General
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Target
2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe
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Size
71KB
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MD5
86a2089f6fe1947051453c55fdc3e99c
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SHA1
129ffd88c09da22faf46e572936e402f9c7ee22c
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SHA256
fcdee2cf79eaf19e606c077ea5f5b3244976f8d595a5650da18448fa05a78e02
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SHA512
9fefdea9157186d25315ea0a2f22c7ef691bddf3a04b6e71102c07175e82f4d0436c848e98d03eb77002a2c72d1a026306fbb62aaa80db60a23b3820f1b4a0cb
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SSDEEP
1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTp:ZhpAyazIlyazTp
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 1272 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" 2024-04-25_86a2089f6fe1947051453c55fdc3e99c_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 2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2040 2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe Token: SeDebugPrivilege 1272 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 2040 wrote to memory of 1272 2040 2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe 28 PID 2040 wrote to memory of 1272 2040 2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe 28 PID 2040 wrote to memory of 1272 2040 2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe 28 PID 2040 wrote to memory of 1272 2040 2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-04-25_86a2089f6fe1947051453c55fdc3e99c_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2040 -
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:1272
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD52825207d82127e51e54a20d7830c6eaa
SHA14c4dddf67fce2cf273eb2b27f0e84f8f093494c3
SHA256ad04b3df2e988b353db3e059598a25806e03c414c6ff7a0b597c82e7ed6c69d6
SHA512e87cbabaab1111199557118619e01a97310f217806c74556cb958efc4a8afba1dee951316285d13009282fd35d6646d8b6319d556fc1e07a990ff923379923ec
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Filesize
71KB
MD566df4ffab62e674af2e75b163563fc0b
SHA1dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA256075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
SHA5121588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25