Analysis
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max time kernel
120s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
08/06/2024, 20:30
Static task
static1
Behavioral task
behavioral1
Sample
2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe
Resource
win10v2004-20240426-en
General
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Target
2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe
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Size
71KB
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MD5
2815684073507e15c829f28b4a99e23a
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SHA1
3c161d220465e31364f586d96195ba25fba43901
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SHA256
08564def6f60d4abf5c52eb0c6136edc989d23d315dedea2fba9592fce938daa
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SHA512
23233f205ddba5af4fc6c382540851b5fbbcc9a29f3792707a1fea99b5ae7a017027b66a5fc40561c110b4cd8a80a86f322d2bb85c7ec62efbde39e862d1f4ca
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SSDEEP
1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTS:ZRpAyazIliazTS
Malware Config
Signatures
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Executes dropped EXE 1 IoCs
pid Process 2332 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" 2024-06-08_2815684073507e15c829f28b4a99e23a_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 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe File created C:\Windows\CTS.exe CTS.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 868 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe Token: SeDebugPrivilege 2332 CTS.exe -
Suspicious use of WriteProcessMemory 4 IoCs
description pid Process procid_target PID 868 wrote to memory of 2332 868 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe 28 PID 868 wrote to memory of 2332 868 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe 28 PID 868 wrote to memory of 2332 868 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe 28 PID 868 wrote to memory of 2332 868 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe 28
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe"1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:868 -
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:2332
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
71KB
MD54dcec04d36da5973be17e02d6ce316d1
SHA11f304d17190623073d3b9b866a6787a29d0bed56
SHA256b90c66895aae4d0dfd775c0e41d2f29668b140d776c30dc4803169d337819c5a
SHA512936c57af8e54a2c30cf8a357d70823f0ab1605ad7c16b4017be79384c892406c25b272718afd46a81783d27df9584dc16e0879bdede1a4d457189cc7141f848c
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432