08a2ddf71430191b7926a496d7e331bb5f33567d9ab8224e8fa4e8501946e039

Analysis

max time kernel
145s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
26/04/2024, 03:42

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General

Target

2024-04-26_0e9d546c6c4174e232194144d5defc6a_bkransomware.exe
Size

71KB
MD5

0e9d546c6c4174e232194144d5defc6a
SHA1

66994a793dbb15d4d71ed11c2d912b94565d5894
SHA256

08a2ddf71430191b7926a496d7e331bb5f33567d9ab8224e8fa4e8501946e039
SHA512

4d4e7d4ca9e8e3d231595d2a4c8829a4c6e2ba755e7945b7b5de454a78f5fd4e5c9542b3e101af894c50cb76feea69d7b93ee68bfb724d562247e2bc9ebfe88f
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTR:ZhpAyazIlyazTR

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3380	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"	2024-04-26_0e9d546c6c4174e232194144d5defc6a_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	2024-04-26_0e9d546c6c4174e232194144d5defc6a_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3500	2024-04-26_0e9d546c6c4174e232194144d5defc6a_bkransomware.exe
Token: SeDebugPrivilege	3380	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3500 wrote to memory of 3380	3500	2024-04-26_0e9d546c6c4174e232194144d5defc6a_bkransomware.exe	85
PID 3500 wrote to memory of 3380	3500	2024-04-26_0e9d546c6c4174e232194144d5defc6a_bkransomware.exe	85
PID 3500 wrote to memory of 3380	3500	2024-04-26_0e9d546c6c4174e232194144d5defc6a_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-26_0e9d546c6c4174e232194144d5defc6a_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-26_0e9d546c6c4174e232194144d5defc6a_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3500
- 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:3380

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

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

Filesize
395KB

MD5
7ec071072d5d7c6754cbb25fbf8454d7

SHA1
d33dd96c63310bdabdbf32ef546a873fcf2244d8

SHA256
3fcea272491aae999301668031239861a5cfb5ad363bec06e5ac6cc9733367ac

SHA512
34374c35865ec1006250ecafcda02707f443fce17e5e03fdfdbecfdd13b87c4de7414182f720667a6d82d211514583206bb21433aba462fe336578bc11467fae

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C:\Users\Admin\AppData\Local\Temp\cm8YjqPWqj6ZLXQ.exe

Filesize
71KB

MD5
03c22e3e4905a1f069fc35c65a601063

SHA1
372991b8d70baab5ad821e27ff059269c5d0b38a

SHA256
6fa80a15b9d0fc2ceb084e55faeafba30cd2f970e1713b08333182d1973812e5

SHA512
76213d934cbdaf634bb8a2570b863987f92f16e3059937b83316475430f012b58f6aa554596d051d2efd4d325e27e67fe7853df6b5215f65e30184d0be4d0d9c

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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