Analysis
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max time kernel
94s -
max time network
96s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-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 3248 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 2972 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe Token: SeDebugPrivilege 3248 CTS.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2972 wrote to memory of 3248 2972 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe 82 PID 2972 wrote to memory of 3248 2972 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe 82 PID 2972 wrote to memory of 3248 2972 2024-06-08_2815684073507e15c829f28b4a99e23a_bkransomware.exe 82
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:2972 -
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:3248
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
394KB
MD554be80e502b47ad9464dbcca4e55248a
SHA12c21601f1ad47c5ad8b1fb7632e7b4c8f884b3b1
SHA25602e16e50aea04b40707c691c4de9836b0bbdf94aba1ca44ad0ef296dfd0f5f6b
SHA51275830f991b4e2cab8acb8f57472e86e117cae57425b6eed3fdb54e331621c9e3b0615be6fb2be8a49a7d92e0ab6ac0db2db74ab8fd91d43e3cebd3601dc49693
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Filesize
71KB
MD526c0e40729470bafbf964bdbcae1137a
SHA11f371ad7fdc4b81aab41c82d70e95255aaa8f365
SHA256dc309532082bf4376c10e22634f764187fdd7634cdced5720e6dcb4f3f1f4bbd
SHA512ff889d57e2ada8ea80d642edca3bc72b13f361db82619d8ea932a4acd57555e53e0fe6afdaf36319b5a2f015133fc90bb945562814f3324414beaf92d9351970
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Filesize
71KB
MD5f9d4ab0a726adc9b5e4b7d7b724912f1
SHA13d42ca2098475924f70ee4a831c4f003b4682328
SHA256b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA51222a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432