a7e584ccf13f597301dfbbb7c3c592c94d1fb1b607e1907771b4592eb5dfe5b6

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
23-05-2024 03:27

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General

Target

2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe
Size

71KB
MD5

1f38c1928312b4aa7900fdf58e75c41b
SHA1

c3dac5f45a882b3e81e01bf94c3a2dd47ff75585
SHA256

a7e584ccf13f597301dfbbb7c3c592c94d1fb1b607e1907771b4592eb5dfe5b6
SHA512

e5fb4d641b116e387b51fcd6119ee455b111ff06681ee669556e6536267174e368a016499b2d13170ecabdc56b59bd824ed95375476b75532f205ddf2619421f
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazT8:ZRpAyazIliazT8

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2188 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
2188	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_1f38c1928312b4aa7900fdf58e75c41b_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_1f38c1928312b4aa7900fdf58e75c41b_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_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2212 2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe
Token: SeDebugPrivilege 2188 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2212	2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe
Token: SeDebugPrivilege	2188	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe

description	pid	process	target process
PID 2212 wrote to memory of 2188	2212	2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe	CTS.exe
PID 2212 wrote to memory of 2188	2212	2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe	CTS.exe
PID 2212 wrote to memory of 2188	2212	2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe	CTS.exe
PID 2212 wrote to memory of 2188	2212	2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_1f38c1928312b4aa7900fdf58e75c41b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2212

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:2188

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\OYgT7xQJ9S6iF20.exe

Filesize
71KB

MD5
4daacccaaadd753f9c8d494540ee81df

SHA1
bfa2e6e20676c9812116ffe34fe495a4f9793c7d

SHA256
9f86ca3ba642e3edd0b21df27d7fe33efd5f045f899eadd24399ff25b3e7f1f2

SHA512
70018915d4fc7ee752b3db1559d03751d15272be1ae89833e1d60eea207d8b04d0816d096ff0882fcabf67b463952398473bbff641ce52cbad7708f5936d6f8e

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit