806c14c42c59c7758edaedba1677631eb532ec18b4dd0fcd5f99d2d9eaa365ae

Analysis

max time kernel
134s
max time network
103s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
29/08/2024, 06:51

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General

Target

2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe
Size

262KB
MD5

9860f37092189c6bc58d555dfe306ce9
SHA1

cf194da9c6a20ae6dbfc795884be249670dc58f0
SHA256

806c14c42c59c7758edaedba1677631eb532ec18b4dd0fcd5f99d2d9eaa365ae
SHA512

29207c4b9ebdf023d555fbb10d4b7142b7cdf25c5ddfaf0865452752bfe40213825d8380d1426fb8d721739e9f50364163ac23a539f39299a21e9b809016714d
SSDEEP

6144:hZMazWIGm3eA0qh1pMjkr9Kiwsb0eb3UPW2pE5:hS0WIGeeAvnpdr9tZbkeQE5

Score

7^/10

discovery persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3328	mOLZZhq4l7UAcoi.exe
3836	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"	2024-08-29_9860f37092189c6bc58d555dfe306ce9_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	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CTS.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	mOLZZhq4l7UAcoi.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3736	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe
Token: SeDebugPrivilege	3836	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3736 wrote to memory of 3328	3736	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe	83
PID 3736 wrote to memory of 3328	3736	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe	83
PID 3736 wrote to memory of 3328	3736	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe	83
PID 3736 wrote to memory of 3836	3736	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe	84
PID 3736 wrote to memory of 3836	3736	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe	84
PID 3736 wrote to memory of 3836	3736	2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-08-29_9860f37092189c6bc58d555dfe306ce9_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3736
- C:\Users\Admin\AppData\Local\Temp\mOLZZhq4l7UAcoi.exe
  C:\Users\Admin\AppData\Local\Temp\mOLZZhq4l7UAcoi.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:3328
- C:\Windows\CTS.exe
  "C:\Windows\CTS.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:3836

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
392KB

MD5
ee48d8456179bd453985411c6098ba99

SHA1
8d02251fe304a3aae9e3ee2dee72daed829fc534

SHA256
1f53a865be3958ac7c2875a476254f5b1c6a1b97066729aae8b7914b4925fc18

SHA512
a2f8c681fd7e90cf538ad58a1a8afb8c5f6ade4613fb1dc18ebee0235fc5732d2d6094b5202aee1ed12a48fe4d7796504e9bf92925efb9006334a41a19b5a97f

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C:\Users\Admin\AppData\Local\Temp\mOLZZhq4l7UAcoi.exe

Filesize
191KB

MD5
94a363cd532d88ac33997c25657a19b5

SHA1
a98f1a8361d0183651c0ef457b9ac4339e429bea

SHA256
13b98844b2fa4a39a4d8ebb414fc79450d5ab4f0c8f5141ac06d40b2a0431ea4

SHA512
3b1c87a67f63e4276453ec1e322f0c13896dd0524ef35f4e4037a481ce354feaa98440f85b784c0b90a900c59ef115654f687457180ea433ea0100427f5c26f5

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads