c8f63c2be5f421a49ea2b72d43a842874529b25508c5f72c06f04177fd3f71f8

Analysis

max time kernel
148s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 03:48

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General

Target

2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe
Size

71KB
MD5

9e9a9a2045cb2407c74c1d49ec012e32
SHA1

d49e431544938f738f168776deff2bcfa9f496a5
SHA256

c8f63c2be5f421a49ea2b72d43a842874529b25508c5f72c06f04177fd3f71f8
SHA512

295cf62000fbfabeb278709d7100ff6bdf7147d6edeb7ebc0817c6c5c592df7306c49a98c464936b9e1ad2f837587c09e921c2bf64375832912294d66db467c9
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTC:ZRpAyazIliazTC

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3004 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
3004	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_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:

2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1284 2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe
Token: SeDebugPrivilege 3004 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1284	2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe
Token: SeDebugPrivilege	3004	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe

description	pid	process	target process
PID 1284 wrote to memory of 3004	1284	2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe	CTS.exe
PID 1284 wrote to memory of 3004	1284	2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe	CTS.exe
PID 1284 wrote to memory of 3004	1284	2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_9e9a9a2045cb2407c74c1d49ec012e32_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1284

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:3004

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
394KB

MD5
0648b77ecfcc80c4a9d4ca625ef02866

SHA1
285d6105ae6fd4ecec131512f3069453652b19d0

SHA256
6f43c5e70f6c592155fe7ea2bd073f0b03681f6fa74f99c876fb8e22c21bd1a8

SHA512
a9a4f458c82fae8c0c4d833ac9b512f8248c4c8631dc02db8d1b72bf499c17d4c715b28f855f0331af6fb3d17f3e494737486081a6157846329f444a984795df

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C:\Users\Admin\AppData\Local\Temp\F3UfSATcZJ4O5tE.exe
Filesize
71KB

MD5
8a6993456dc9deeeba18ec3171ce52b5

SHA1
e7ae043ce5d5fc78dfe84e30fd0f4e874d144a47

SHA256
dbd0030a0048f727c32784cf7d6eebdc5e127009e2d0b15a47fd60499a57ebb9

SHA512
be7deaaca952b68f75a239fc61cd6a8b32e7b7a2179ec01032e623178a0b56587b0bb60b095ee6a5651da5ad6d38bf27295c66e5635a2fe1ebaf39af75243982

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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