69cfbf42e40623d002a35df52bc24faa492ee4606803eb0da1101af87a4ec272

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
28-04-2024 07:24

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General

Target

2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe
Size

233KB
MD5

84ecba26cb8061c7ce5061ee8a4d3501
SHA1

13a261a537f605ac7ebfd331a7e99d295a420027
SHA256

69cfbf42e40623d002a35df52bc24faa492ee4606803eb0da1101af87a4ec272
SHA512

9136bc64dc4f8e57de737aa03ef1e3f478bf3ab715fb4d89c6547a34d214360a980b889d0b6c77848b6fd3243608c21a74e95bd1cd990b4f35954689afe05a7d
SSDEEP

3072:ZhpAyazIlyazThrEplvaq8a532I1yY5EJ0IUh64jBdFLy3dJJwwZkFMwuhdd6:hZMaztAppaFa5GemlUhDjBvIJLZ3wmi

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

2488 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
2488	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_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:

2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1640 2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe
Token: SeDebugPrivilege 2488 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1640	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe
Token: SeDebugPrivilege	2488	CTS.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe

description	pid	process	target process
PID 1640 wrote to memory of 2488	1640	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe	CTS.exe
PID 1640 wrote to memory of 2488	1640	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe	CTS.exe
PID 1640 wrote to memory of 2488	1640	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe	CTS.exe
PID 1640 wrote to memory of 2488	1640	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1640
- 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:2488

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\uNprLX6zX4mxht1.exe

Filesize
233KB

MD5
f78f9662b0d5c028e27434cf17a7e08e

SHA1
9a46eefba824ffdf2cc51de4c90a7e797b51679c

SHA256
3800c0ec2bca92afa30dbfc155dcafa64e4bd81e03f7107da5546fcafb0ba208

SHA512
93a064f324a44258a81c3719c9f99fd73af73f376c58b3156efc26bc1c125f6379afb28d663887e56be645452e4bc9848064624639a0e9559e1cf4704bd969a3

Download Submit
C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit