af417c8f31915861bef22cda49e494868effcbe67d61db9bdef712062f4085f7

Analysis

max time kernel
55s
max time network
54s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 10:28

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe
Size

131KB
MD5

fc6c4588ecc06408ab687289414bf36f
SHA1

1ca5c6417a53ac51185d3ba96ebe47400b12cab9
SHA256

af417c8f31915861bef22cda49e494868effcbe67d61db9bdef712062f4085f7
SHA512

24e9c7f95357d40c9be81d9ff5253e8042c79e1f96d677ff6ff5a7d79e5b77c9ad464fa199c7e5286717b64aba1ae93ad0af13a7481d6f2e3bfd53d497ff4805
SSDEEP

3072:ZhpAyazIlyazTPRcZ3V4o+t5q5hwXI9H9JNBZ:hZMazr8eo+tE7wXIhlX

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

Processes:

Xxn2DiwnlpWXNix.exeCTS.exe

pid process

384 Xxn2DiwnlpWXNix.exe
1244 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
384	Xxn2DiwnlpWXNix.exe
1244	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.exe2024-04-28_fc6c4588ecc06408ab687289414bf36f_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"	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe

Drops file in Windows directory 2 IoCs

Processes:

2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 880 2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe
Token: SeDebugPrivilege 1244 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	880	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe
Token: SeDebugPrivilege	1244	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe

description	pid	process	target process
PID 880 wrote to memory of 384	880	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe	Xxn2DiwnlpWXNix.exe
PID 880 wrote to memory of 384	880	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe	Xxn2DiwnlpWXNix.exe
PID 880 wrote to memory of 384	880	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe	Xxn2DiwnlpWXNix.exe
PID 880 wrote to memory of 1244	880	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe	CTS.exe
PID 880 wrote to memory of 1244	880	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe	CTS.exe
PID 880 wrote to memory of 1244	880	2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_fc6c4588ecc06408ab687289414bf36f_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:880

C:\Users\Admin\AppData\Local\Temp\Xxn2DiwnlpWXNix.exe
C:\Users\Admin\AppData\Local\Temp\Xxn2DiwnlpWXNix.exe
2⤵
- Executes dropped EXE
PID:384

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:1244

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
7280cb47bba499ccfea3e5e8a8cf821d

SHA1
4f4fbf5448cdec7bbeb31860cea06bfc56a8e4f5

SHA256
8a09bd1345c816fb81b25a3ba2c7fe9c579f956f25480971c618c54928abc6d8

SHA512
3a9dcc94bf140e2f81ee57186874674754ae4bd2b3326873b9970554afa2517ec213ef5fd3d5754ab84fd0e2bddd1306206ccd5e46e3baa1e18a6960783ec540

Download Submit
C:\Users\Admin\AppData\Local\Temp\Xxn2DiwnlpWXNix.exe
Filesize
60KB

MD5
ed0fde686788caec4f2cb1ec9c31680c

SHA1
81ae63b87eaa9fa5637835d2122c50953ae19d34

SHA256
e362670f93cdd952335b1a41e5529f184f2022ea4d41817a9781b150b062511c

SHA512
d90d5e74a9be23816a93490ed30c0aae9f7f038a42bd14aa2ce78e95967b4aabd848f006f00ade619c9976755658d45aa0f5b6d5babbbb2d59a6ed3a3a12ac6b

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads