b2eab17f344b03ce85f297fa8151dec55059f7ad2037cb0926e21f5385505850

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 07:51

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General

Target

2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe
Size

71KB
MD5

41252a92e912a48a04cee3a55e501e90
SHA1

2b2b3a8ffdb9fcf638281b12db8248b24c0179bf
SHA256

b2eab17f344b03ce85f297fa8151dec55059f7ad2037cb0926e21f5385505850
SHA512

1bd30e5fa0e5a1e9b9f4d0d0e886d35da030710725154fe262c8bc904915280a8233e15f9b158bdb80d3269a8992ed00adb0ce31343d7bb1ce5e6c9ad1956afb
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTC:ZhpAyazIlyazTC

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1708 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

pid	process
1708	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-23_41252a92e912a48a04cee3a55e501e90_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

Processes:

2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2348 2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe
Token: SeDebugPrivilege 1708 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2348	2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe
Token: SeDebugPrivilege	1708	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe

description	pid	process	target process
PID 2348 wrote to memory of 1708	2348	2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe	CTS.exe
PID 2348 wrote to memory of 1708	2348	2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe	CTS.exe
PID 2348 wrote to memory of 1708	2348	2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe	CTS.exe
PID 2348 wrote to memory of 1708	2348	2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_41252a92e912a48a04cee3a55e501e90_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2348
- 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:1708

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\Temp\n1tJdkByvTZhtp4.exe

Filesize
71KB

MD5
4ddcd71c956753fa02539f926a63b365

SHA1
18c0a748710e916aec889751ffd9e4ea9c8b2d8b

SHA256
62b22aee7e6df35b5a85f546f2ccb565521e3c8b6d0aff0a76b51bbab2ef632a

SHA512
138ed586b7c8f6bb04911ffbb265825a1d7946e7e53d9040deb4f47a28f9b699983439073853cee9dfd85437cb2e706a8e4fdce8dcc5cd0b9e1972a50d35ca0f

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit