3ea03e1f81a16637c79386378cff7adb9e66f7b13f9cc30b6b7a96dda648b5d6

Analysis

max time kernel
132s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
02/06/2024, 22:27

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General

Target
2024-06-02_c5b2b97714777f9f8d9992e8795a4946_bkransomware.exe
Size 71KB
Sample240602-2c66ksad44
SHA256 3ea03e1f81a16637c79386378cff7adb9e66f7b13f9cc30b6b7a96dda648b5d6
MD5 c5b2b97714777f9f8d9992e8795a4946
SHA1 9e193fe7f67ea2beb2036c28a145eea93699169c
SHA512 60d00a5b6bf46778f1a8f75ecb11982cece9212c584ff4472f18b8cb1bb86fcc8693484f247de96d4c46e8881ccc19efc3e91f3704da42889f52235f2b2d0ebf
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTs:ZRpAyazIliazTs
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1408	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"	2024-06-02_c5b2b97714777f9f8d9992e8795a4946_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	2024-06-02_c5b2b97714777f9f8d9992e8795a4946_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3460	2024-06-02_c5b2b97714777f9f8d9992e8795a4946_bkransomware.exe
Token: SeDebugPrivilege	1408	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3460 wrote to memory of 1408	3460	2024-06-02_c5b2b97714777f9f8d9992e8795a4946_bkransomware.exe	83
PID 3460 wrote to memory of 1408	3460	2024-06-02_c5b2b97714777f9f8d9992e8795a4946_bkransomware.exe	83
PID 3460 wrote to memory of 1408	3460	2024-06-02_c5b2b97714777f9f8d9992e8795a4946_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-02_c5b2b97714777f9f8d9992e8795a4946_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-02_c5b2b97714777f9f8d9992e8795a4946_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3460
- 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:1408

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

Replay Monitor

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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 966ed28ed6cfe3349b5bbf5757e776cb4bd3fc2de08c4a476aa8087a042e10e3
MD5 9abf5876333eb546bf3e1a9c3472c0ae
SHA1 18323019de6c2081280d0f9d7f581b385806bfb6
SHA512 e01c8e0e3d2f932962c061c89f5ed0cde3641526feb52130a6ba8882a995fb6fd2391550b6344ef77727998b8fd56bf0086a249a851d3c8f5a2e3ee030095166
SSDEEP 12288:xC0f5Q77uyHaewIZ+3WDE8O2GHDn1gCOI:Dfk7uCwIR0V3
MD5 SHA1 SHA512 SSDEEP

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2yPe5d1StbxnkeA.exe

Path C:\Users\Admin\AppData\Local\Temp\2yPe5d1StbxnkeA.exe
Size 71KB
SHA256 c6f4a4092e5fa77f4bcc3b22173084bf186b875a853af50e7269aec13867f086
MD5 fa013084675cb86601db69b5846268ee
SHA1 ad527777b1fff029603311fff99031c1bc782b7b
SHA512 d6f936527c122f7a9dea1ceb63b102d239db4f31e6f57eb33b579298fcb6aa81229a2aedd5e667dbb55cbe92976aeee1800752e7299c026b3e7d66c776a14df5
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTO:ZRpAyazIliazTO
MD5 SHA1 SHA512 SSDEEP

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CTS.exe

Path C:\Windows\CTS.exe
Size 71KB
SHA256 b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc
MD5 f9d4ab0a726adc9b5e4b7d7b724912f1
SHA1 3d42ca2098475924f70ee4a831c4f003b4682328
SHA512 22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432
SSDEEP 1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT:ZRpAyazIliazT
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