3e1051c6eeee66669ed24d3aca17cef75a35db341f58fc4dff8f494bcb6bb7a0

Analysis

max time kernel
141s
max time network
124s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
03/05/2024, 02:26

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General

Target

2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe
Size

135KB
MD5

64f9a461d8163d3c64bd96fe4348dbf1
SHA1

0f80ea089415e628c10cad653e8cc2359aa914ea
SHA256

3e1051c6eeee66669ed24d3aca17cef75a35db341f58fc4dff8f494bcb6bb7a0
SHA512

7b7876f33bb3e403989faf6c87e710b163443c028d6950c82df3e1cb4110ec7411579f94e292a082f214b9f0942b7e20145fead8aae654a83f31efbf06304484
SSDEEP

3072:ZhpAyazIlyazTOIN7enFdWTa3xu1mBv12vFytEhi2:hZMazFNIWTa3VxWhi2

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
4908	9A5ObYwlmUPx6Is.exe
3500	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

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_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

description	ioc	Process
File created	C:\Windows\CTS.exe	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	864	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe
Token: SeDebugPrivilege	3500	CTS.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 864 wrote to memory of 4908	864	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe	84
PID 864 wrote to memory of 4908	864	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe	84
PID 864 wrote to memory of 4908	864	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe	84
PID 864 wrote to memory of 3500	864	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe	85
PID 864 wrote to memory of 3500	864	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe	85
PID 864 wrote to memory of 3500	864	2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-03_64f9a461d8163d3c64bd96fe4348dbf1_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:864
- C:\Users\Admin\AppData\Local\Temp\9A5ObYwlmUPx6Is.exe
  C:\Users\Admin\AppData\Local\Temp\9A5ObYwlmUPx6Is.exe
  2⤵
  - Executes dropped EXE
  PID:4908
- 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:3500

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

Filesize
394KB

MD5
8485cbd30303e372fbec5b12f2e25b9d

SHA1
d1617d34a756e1a0247a50909be04814b35d3744

SHA256
27cb5364ff9a08496e2d16db92f2035cc3489c90fcbba0cc02789a1230515cb5

SHA512
93abdc7202a1eb7504689065e0cfc8daf0788523260559110dc3dba8e94ff5b5b04325b1ce2b3fc33a2f3b8fe722726ef7bb984aeff332c7785abc5ce7cda558

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C:\Users\Admin\AppData\Local\Temp\9A5ObYwlmUPx6Is.exe

Filesize
64KB

MD5
e97c622b03fb2a2598bf019fbbe29f2c

SHA1
32698bd1d3a0ff6cf441770d1b2b816285068d19

SHA256
5c1af46c7300e87a73dacf6cf41ce397e3f05df6bd9c7e227b4ac59f85769160

SHA512
db70c62fb35a8e5b005f13b57c1ebbf6c465f6ff0524422294c43e27fb4aa79379dc1e300ad11dc2354405c43b192ae06b91c0f525a1f2617e4d14673651a87d

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads