Malware Analysis Report

2024-11-30 06:11

Sample ID 240612-sftj8azana
Target 2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware
SHA256 f79146d5e2876038b5f45b119a28499b99a58ea26d45b3da22aaf1ee478e1d4f
Tags
persistence spyware stealer
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

f79146d5e2876038b5f45b119a28499b99a58ea26d45b3da22aaf1ee478e1d4f

Threat Level: Shows suspicious behavior

The file 2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence spyware stealer

Executes dropped EXE

Reads user/profile data of web browsers

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-12 15:04

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-12 15:04

Reported

2024-06-12 15:07

Platform

win7-20240220-en

Max time kernel

120s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\CTS.exe N/A

Reads user/profile data of web browsers

spyware stealer

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

N/A

Files

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

C:\Users\Admin\AppData\Local\Temp\OBiW1AL8U3fvcrh.exe

MD5 c403016603297083f92f853a2606b663
SHA1 f1f3c1e84f860ab88243c5a835ab2f517f343787
SHA256 8aed4ec6cc18db0b8c32199c9f0ab1ae9cb9801acf287da3cb6a77bd54c5c78e
SHA512 6848925e410b80b24c9111c0564a8d09752bd3f26a81095b474add1afc7b82b4586f90c73b34da3e34830ef8569093b9baaa9b3b3f9d15459f2514ff047b4858

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-12 15:04

Reported

2024-06-12 15:07

Platform

win10v2004-20240508-en

Max time kernel

51s

Max time network

51s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe"

Signatures

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\CTS.exe N/A

Reads user/profile data of web browsers

spyware stealer

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Windows\CTS.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe" C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\CTS.exe C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe N/A
File created C:\Windows\CTS.exe C:\Windows\CTS.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\CTS.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe

"C:\Users\Admin\AppData\Local\Temp\2024-06-12_6d7bc49156d75d35e900af55c2327bf0_bkransomware.exe"

C:\Windows\CTS.exe

"C:\Windows\CTS.exe"

Network

Files

C:\Windows\CTS.exe

MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml

MD5 c1f64945288c13d5100748b72d31b351
SHA1 e57ed2526e02160fc4e557f12b7cde2e21dc578b
SHA256 1c2b6c239b4fe6291d20579c0d6878c792783b2390fe1718e4183cae26e2bbcd
SHA512 74eb69a27b373c6a55a22e70a332bc84fb6936621142dbfdeeafe5d5c96f455385ddc36dd51ddc49772faba6b6aeccd3d91dc66c90aa6be1736c6a1f9e00b6cf

C:\Users\Admin\AppData\Local\Temp\TFnV2JBDk3F8OUA.exe

MD5 6a8d3fe46f19295aeed44cd64b9565aa
SHA1 6e0fc6de2d7f026375022f36e8064ca869931d7e
SHA256 8ac0d2fa03bcecdd976c9d8cacd171eba2952d4f2ffd70b28425d6f6a97a335d
SHA512 dd2aaed4af14ec72c895e807d892a14a6258241400b50994021a127b0ca28b05ebeaedf226b4e44eb476969ad89682426c077a41e085c216546ae44eff87da7b