3f9cc9bc080d785152e11a1c2131b04cc5cc0c6b44779356078ccf74086568af

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
28/06/2024, 22:22

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General

Target

2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe
Size

108KB
MD5

3b34fa05b27eae70b72e1c7d15f93853
SHA1

20ef9c6c219873d74489927fac7ac9b80d4889ee
SHA256

3f9cc9bc080d785152e11a1c2131b04cc5cc0c6b44779356078ccf74086568af
SHA512

506bd620257904e7da99851a3706b463001f963567c3609facb0ebc05465b20479704d33a427d83b0f8b9078bc04dbb36a08e8d09804a66459d06d2f39aced7a
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTbOlPNA8hdN9T4NAOGq5Sy:ZhpAyazIlyazTCPNA8vN9T4CeH

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2560	FY7yyAStdp6tL46.exe
2596	CTS.exe

Loads dropped DLL 1 IoCs

pid	Process
2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.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"	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_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	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe
Token: SeDebugPrivilege	2596	CTS.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2652 wrote to memory of 2560	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe	28
PID 2652 wrote to memory of 2560	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe	28
PID 2652 wrote to memory of 2560	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe	28
PID 2652 wrote to memory of 2560	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe	28
PID 2652 wrote to memory of 2596	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe	30
PID 2652 wrote to memory of 2596	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe	30
PID 2652 wrote to memory of 2596	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe	30
PID 2652 wrote to memory of 2596	2652	2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe	30

C:\Users\Admin\AppData\Local\Temp\2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-28_3b34fa05b27eae70b72e1c7d15f93853_bkransomware.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2652
- C:\Users\Admin\AppData\Local\Temp\FY7yyAStdp6tL46.exe
  C:\Users\Admin\AppData\Local\Temp\FY7yyAStdp6tL46.exe
  2⤵
  - Executes dropped EXE
  PID:2560
- 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:2596

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:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit
\Users\Admin\AppData\Local\Temp\FY7yyAStdp6tL46.exe

Filesize
37KB

MD5
371627fd939bb54ed26f473ca54e718f

SHA1
3a6910295ae9d1fe388b7572736b8bdfc6e0d111

SHA256
b5481e424246a174456add0132427df3a7cd4105f5769835cdf597966c7c0b61

SHA512
ff7ea5ae445089ffa808c97e23c620313dd267994b343176c0cb9f8098aace1d12d9212b96611fdf97c974ef94f866b817aed9c0e5f4f195234e7d8d4ec3f8cd

Download Submit
memory/2560-12-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/2560-14-0x00000000011A0000-0x00000000011AE000-memory.dmp

Filesize
56KB

Download
memory/2560-15-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads