Analysis
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max time kernel
92s -
max time network
93s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
09/06/2024, 07:34
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe
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Size
71KB
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MD5
cf39085b9da0db42e767436878da1cf6
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SHA1
e04ad1d12a3bd14bb1d5c9ab1bc2b751cfaad55a
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SHA256
04c56b9ff809aaef4afafe40c233fa1f9264b9783216e76c1311528651f706af
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SHA512
cbc42bba577dcf6034dce05d7c76efa1e7e0fc885f8047c1edf8e0683fd2c4b3e2fa5d266edd8ea9c2bdaeba59c0236142630ca4416037039cf9fbb9be06d972
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT8:ZRpAyazIliazT8
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 1860 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" 2024-06-09_cf39085b9da0db42e767436878da1cf6_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 CTS.exe File created C:\Windows\CTS.exe 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 1192 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe Token: SeDebugPrivilege 1860 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1192 wrote to memory of 1860 1192 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe 83 PID 1192 wrote to memory of 1860 1192 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe 83 PID 1192 wrote to memory of 1860 1192 2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe 83
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-09_cf39085b9da0db42e767436878da1cf6_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1192 -
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:1860
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD5a2cb39f7f05c0026c5c15c557b542510
SHA10f2363a80ccaab74676b1e2a02fda906775c62ab
SHA25611b0fd4c1d5914b8f8a6b89150d4c2a88290d10a592ae36cceae54038fa0fb33
SHA512a19d99a48b8b11cbdb6cd4cc1a9a5435c2dd9907e124e61cc07b590c001d0d1247089fc928323d5e02ff62eb10fd06edafa99cdb624c0d6e042b252a2b33841f
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Filesize
71KB
MD53afc8ad34d6422a1a987e76a11ba47f0
SHA11bbbe728f732da1021ee798d3a2184ca8e408f45
SHA25693a5921ad895900c1fe8c386d5e4fc6cc1fcf34a0046d08c689ebcde32c854df
SHA51293cc41fac320c160678656ad0a544bf1df7153fee8fc43afce64826ffe48c7141e7b4d338440fb0a527adef9855fee8308ed073d5640b51bb3b553c13094ff8d
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432