29fe12e4067f1c318ce95b5203736bcf4f5cb97c31b8079d89ded2afaa6cd216

Analysis

max time kernel
57s
max time network
40s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
27/04/2024, 17:30

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General

Target

2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe
Size

71KB
MD5

8da2bf47e54a8858b398bf3a1dad5699
SHA1

089462b0f8137ee4759bc7dd6f046abe8f100dee
SHA256

29fe12e4067f1c318ce95b5203736bcf4f5cb97c31b8079d89ded2afaa6cd216
SHA512

edc11620530131037a02d66fe9092f70b4ed6e698ad048b765990c1f13634732a3106a570896a568e4aef3d5b0c15efb7318ac825271423f09bd418b20e69bd6
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTEwV:ZhpAyazIlyazT7V

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
936	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"	2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_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	2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4408	2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe
Token: SeDebugPrivilege	936	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4408 wrote to memory of 936	4408	2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe	85
PID 4408 wrote to memory of 936	4408	2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe	85
PID 4408 wrote to memory of 936	4408	2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe	85

C:\Users\Admin\AppData\Local\Temp\2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-27_8da2bf47e54a8858b398bf3a1dad5699_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4408
- 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:936

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
392KB

MD5
f39fdcdf055d78a9cdf6fc70daaf61c1

SHA1
000693fa547aa7a5acc351ffd6a0333d307baada

SHA256
641c09e183d33d0146ee0fadc3e76faece4e9f384d4a06137f3cccef48349621

SHA512
4e18d763941250830f9f6d4798d683990ca24eba73b7bf1fcad5685cbc4513166fac888ec04c8e92bbcc49f2046eb1bb9c810340ac657821955351943842aef0

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C:\Users\Admin\AppData\Local\Temp\TDSLd9fLPn0O5ww.exe

Filesize
71KB

MD5
5a4041409bb46f29b496e7ecdfbc657d

SHA1
caf5a45744287677499d643c950eae6298b96cf5

SHA256
087a78af73efe0e8c7c5e607b572d63de461adc79a6eae7b3c3ea703dc9ef9bd

SHA512
7271aa0296e2a6734a015811496c2e7086f6e4a69bea2ed699e31fad167ef753d1dc1e38eff9f46872ebd54ae05215030688d8a5ee23df05e9179905898a6404

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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

Replay Monitor

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Downloads