99ce65e5e69ec06250642c8f7631189a26934d1e620ada792e245464db16f190

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
12/06/2024, 19:42

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General

Target
2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe
Size 174KB
Sample240612-ye23vs1eqq
SHA256 99ce65e5e69ec06250642c8f7631189a26934d1e620ada792e245464db16f190
MD5 65739e0fd69f124b43a55d4410da690b
SHA1 4c2e24134c30d489a4b0d12f8ae9e6758b00f7de
SHA512 19e526887958a418c51ac062ce0adf47c0eccbac4e6ea9f3f3937269a3370ed145751f89cea5e5b7dd2a453aef75e3fff1fbb4ec88e9c1990d1ba7080c15100b
SSDEEP 3072:ZhpAyazIlyazTmpGcUM6PY7nzc8HtAwCgF3i0Kde506C1yC4rGgnNnEdo3wSU:hZMazkGNM6PY7zfHtA9gFS0Kdee6ntr4
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
812	QBO5XVbxENRsqtm.exe
4020	CTS.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-06-12_65739e0fd69f124b43a55d4410da690b_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	2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5084	2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe
Token: SeDebugPrivilege	4020	CTS.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 5084 wrote to memory of 812	5084	2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe	82
PID 5084 wrote to memory of 812	5084	2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe	82
PID 5084 wrote to memory of 4020	5084	2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe	84
PID 5084 wrote to memory of 4020	5084	2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe	84
PID 5084 wrote to memory of 4020	5084	2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-12_65739e0fd69f124b43a55d4410da690b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5084
- C:\Users\Admin\AppData\Local\Temp\QBO5XVbxENRsqtm.exe
  C:\Users\Admin\AppData\Local\Temp\QBO5XVbxENRsqtm.exe
  2⤵
  - Executes dropped EXE
  PID:812
- 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:4020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

excel.exe_Rules.xml

Path C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Size 392KB
SHA256 168fe0b8c5cb3e0ced2650a41767a5583c5ab2ed45b4b566694d4fc2a9eabcd3
MD5 c4d7f8313da43e5ef8f1d626ba120371
SHA1 8689e0980d0ddd718f629073699f6aff0e92aa96
SHA512 ab8e6f9191f422f9a3daa425c0a06829e4795694e68ae6cb87f191dc2410b2878b84ebf2a605bcf65d1b303e0bd723a588dabcd1a82311f0dc9af0777091e230
SSDEEP 12288:hS0XC+4tXvWJs1RYqMqvHsErx2hnZo96FXy7zW8rMmZ4MV:DSt51RYQUEVmnZ2SXyW8rHeMV
MD5 SHA1 SHA512 SSDEEP

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QBO5XVbxENRsqtm.exe

Path C:\Users\Admin\AppData\Local\Temp\QBO5XVbxENRsqtm.exe
Size 103KB
SHA256 b33db48ce11539130b143caa2eec3a38c439de13a2aeffed07cb9b89bcc82fd4
MD5 40e6081a84568a750c469df520dd0ae1
SHA1 fcc160e9f213a7ce674861c9f4efab2b9f0b13d5
SHA512 91feb528a2c033d0f5261a6c244b640a988d1a42caf0b8bd144a458555a1172e9ac7b23d2ff9304366559008cf3f92445ce59398a3756c0ed3ef343b824f82a2
SSDEEP 1536:Oq9wlfW9aTR7gyTdneTaef5g9aJxgdS64Cdk+uJE4F4k1hEZqm6iM1FfHYTopp9:n9sfQvTbuaJG4vlP6k4qmKjfHYTo/9
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163
MD5 66df4ffab62e674af2e75b163563fc0b
SHA1 dec8a197312e41eeb3cfef01cb2a443f0205cd6e
SHA512 1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT:ZhpAyazIlyazT
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads