69cfbf42e40623d002a35df52bc24faa492ee4606803eb0da1101af87a4ec272

Analysis

max time kernel
67s
max time network
49s
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 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

5080 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
5080	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 4700 2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe
Token: SeDebugPrivilege 5080 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	4700	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe
Token: SeDebugPrivilege	5080	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe

description	pid	process	target process
PID 4700 wrote to memory of 5080	4700	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe	CTS.exe
PID 4700 wrote to memory of 5080	4700	2024-04-28_84ecba26cb8061c7ce5061ee8a4d3501_bkransomware.exe	CTS.exe
PID 4700 wrote to memory of 5080	4700	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:4700
- 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:5080

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
395KB

MD5
ba510984b58f8151bece0eedea7b8060

SHA1
517df9cc31b80031de5969e2f6071ab49f65df8d

SHA256
cb50ae40421957c6cddff468298b874a669aa35e3763bef4978443e9e8c3fe5a

SHA512
a3db13abbaa618575ff9a6fba8ae880a5700c7827f0c3024352895daf93de75b697ee195e822c9a4cdb6d7cfdef420d677750736f386adb5bb3740b99ceead9c

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C:\Users\Admin\AppData\Local\Temp\K2w9yxaVpNQxC88.exe

Filesize
233KB

MD5
3c0b037d50f22f97c5ceddf92f02a8ef

SHA1
44356d28da303f21fd9fffab055e754f650d84ab

SHA256
040bc80246810d0698320027f705249bbeddc80382f17077bede93e44f8b25a0

SHA512
dac50bdc3528954119bff64107071b5c4a95d0e04ce0d63ba8f245b09d034e01287ee7a2cb3f723f548453112e528358e7417f1017c895505711887e6419fd5e

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C:\Windows\CTS.exe

Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit