05af5ab136d221df70703f51d22ab98c718d744a2646cfcfb9ef3a5c90c53fbc

Analysis

max time kernel
92s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 06:44

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General

Target

2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe
Size

71KB
MD5

3409e55371d9bc80ce9ec8ea57aeef09
SHA1

46dc6be8e234c16999351af7e73f6625d8638d40
SHA256

05af5ab136d221df70703f51d22ab98c718d744a2646cfcfb9ef3a5c90c53fbc
SHA512

d27d5db4638dfd96e6c8d9b0fcad59d456bde60c323a9cc7ab44cf42b1820794e3db75449692bb0857cd0841e0bcbb74f1d1b01fdf9e7c7fdb17e6b3b339d1d1
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTk:ZhpAyazIlyazTk

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1300 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
1300	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_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:

2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 5076 2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe
Token: SeDebugPrivilege 1300 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	5076	2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe
Token: SeDebugPrivilege	1300	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe

description	pid	process	target process
PID 5076 wrote to memory of 1300	5076	2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe	CTS.exe
PID 5076 wrote to memory of 1300	5076	2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe	CTS.exe
PID 5076 wrote to memory of 1300	5076	2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_3409e55371d9bc80ce9ec8ea57aeef09_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5076

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:1300

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\Microsoft\Office\16.0\excel.exe_Rules.xml

Filesize
392KB

MD5
a2620b4e5fef70eedc377e5e9dd5245e

SHA1
2f153f8cf5675e32680876037d820a818a4d7ceb

SHA256
d0c43e9e59655ded2a3aba694ab00f05285a669f00ba4dcd56cf4b2378ba25ba

SHA512
6f27ebddc61573cb0fcab01fe8f9b8d9bde68ba4eb1b58fd62ab53ae5c0d332ead5c8c32ebb400a90963a32c94fb250611233875a5c78ecca3ee8b01a8b981a1

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C:\Users\Admin\AppData\Local\Temp\D91zKwyuuyE7Nqy.exe

Filesize
71KB

MD5
fb12be6271233eee98bbd49fb185b460

SHA1
bfad9997c20a5678a6e6016dcbe3f2d27096cca3

SHA256
682bf8a8bbacfbc1c04a8bc399aa531e01cc9fe72369c874c38b2340ecaecdd6

SHA512
c175baf41d62df07afcdc5ba728b336a09f57bd449113f98dc765741be7099ac73259a8f20964bd0febe4cf787a2f0c7a81fc95f3d05359a5cbf11ac9d1a9710

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit