42efa447d805b5ab033f854624919d9b57ae8144582bf71880c2a5b4f9e91823

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
21-05-2024 19:30

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General

Target

2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
Size

72KB
MD5

5d9d10899433b972058fa26c98e4a872
SHA1

85a81505fa79499dc9dc451b98d9c89e9b94c008
SHA256

42efa447d805b5ab033f854624919d9b57ae8144582bf71880c2a5b4f9e91823
SHA512

e9ea7b384acb1967fdb8363dc48ccf08df7a13bb587d8ebbe5f2ae9b3deba8f13fe246c30918e687fb92cf7028b81270cd3bb0db4a880fd4cc7ec168579152aa
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTS:ZRpAyazIliazTS

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:

CTS.exe2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	CTS.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

CTS.exe2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe

description ioc process

File created C:\Windows\CTS.exe CTS.exe
File created C:\Windows\CTS.exe 2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1924 2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
Token: SeDebugPrivilege 1708 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	CTS.exe
File created	C:\Windows\CTS.exe	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe

description	pid	process
Token: SeDebugPrivilege	1924	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
Token: SeDebugPrivilege	1708	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe

description	pid	process	target process
PID 1924 wrote to memory of 1708	1924	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe	CTS.exe
PID 1924 wrote to memory of 1708	1924	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe	CTS.exe
PID 1924 wrote to memory of 1708	1924	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe	CTS.exe
PID 1924 wrote to memory of 1708	1924	2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_5d9d10899433b972058fa26c98e4a872_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1924

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\5N921UCMZdPL3BJ.exe

Filesize
72KB

MD5
42514a85887e1f02d0e6f62787cf36bc

SHA1
6bb1268897c5ab7f4e1b38232f5b2f3448ce732d

SHA256
7bca23f2abbfe069a91630f1dcaf1bcd0f7dafe89801bf68f66b8fc62a042c12

SHA512
a0c4ddd219cac0d2924e4d6e18ccfb529ed16494d43a8f0c387b0d97cf0ba305d7e0e6a0e7942a2e9a5fc0b1962e3cc24f5c716c97614029f10ae2735a5d47af

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit