24cf61fc1f05c71abba8bba768cd57e1923aa612c787c9b7b7525158473b1c25

Analysis

max time kernel
131s
max time network
103s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
04/06/2024, 00:24

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General

Target
2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe
Size 71KB
Sample240604-aqhllaef2w
SHA256 24cf61fc1f05c71abba8bba768cd57e1923aa612c787c9b7b7525158473b1c25
MD5 5fff1872ff95d09e59f17f44020f88e7
SHA1 721f3517a4826dd530d28e1ddcf718383ecb4197
SHA512 d1fc066814e1c45572803141eeb385a16dd30b643a6bf139fcf221193c833d4b085a3c63e212d7e374de17c1c18a49cc01005b00e0218ec9dd6b3f641f7c0dc9
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTK:ZhpAyazIlyazTK
MD5 SHA1 SHA512 SSDEEP

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
4136	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"	2024-06-04_5fff1872ff95d09e59f17f44020f88e7_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	2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	848	2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe
Token: SeDebugPrivilege	4136	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 848 wrote to memory of 4136	848	2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe	83
PID 848 wrote to memory of 4136	848	2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe	83
PID 848 wrote to memory of 4136	848	2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe	83

C:\Users\Admin\AppData\Local\Temp\2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-04_5fff1872ff95d09e59f17f44020f88e7_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:848
- 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:4136

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 33b6781e804a30216d6155b2c6cbfb0bc538cd14adc548e0e95ef4a178ce52ec
MD5 d60f11cfc6761bdc3db0b904ede8c3e2
SHA1 e11b7e723cf63d2475131bfcbf46a177e0c4728c
SHA512 6c89a7c29b1d25f7f55d92af0e819365d153b74803c89c7cbba0248956a10e6da9c94b64b21215a8efb5dee3e7b953d1fb90a4cca66d3e5eaf85cf299cfb2965
SSDEEP 6144:hZMazHvF9KUsiqblL/G7YLEdk0J1ZcCGl5foHgjyxVWGn1VcwWo8pkSxpZu:hS0PLKdioLO7YLyhFGnagxiVc3o8pZu
MD5 SHA1 SHA512 SSDEEP

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MQBbJsBwdwRItrJ.exe

Path C:\Users\Admin\AppData\Local\Temp\MQBbJsBwdwRItrJ.exe
Size 71KB
SHA256 9cec0460de8127b6b7e6c687b9bf3f53d61a6bb52e740f01e7e3c2c8998369eb
MD5 eda76a744b262248ac7bf5b070c949b8
SHA1 d7b68794dc1c353919cad40f2138252ab3d81e53
SHA512 c2c893717fc5cd9d1c822e381ab9bf080506920b109f6e252d950ac07303de3107d671528d133ade7330db0bb90c75e99b08fb238a460d59d96b4b5e24640106
SSDEEP 1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT+:ZhpAyazIlyazT+
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