70b8331eb8ae0877fe442e83081fe0e0930ddf34135810c6c5406eef1e292f17

Analysis

max time kernel
66s
max time network
52s
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 14:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe
Size

71KB
MD5

53ed0426e33d002de2060681c22b8fb6
SHA1

7893fc1330b9e721eb8d7b041f384c989df92bc2
SHA256

70b8331eb8ae0877fe442e83081fe0e0930ddf34135810c6c5406eef1e292f17
SHA512

42eaaed01132f2fd7f60b4691a92474b35539647440540f0523023d1726875e35f4d9d03449676c165faf4136d8381770972ddefbe1f854353bcabf594992207
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazT9:ZhpAyazIlyazT9

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

756 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
756	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_53ed0426e33d002de2060681c22b8fb6_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_53ed0426e33d002de2060681c22b8fb6_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_53ed0426e33d002de2060681c22b8fb6_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4496 2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe
Token: SeDebugPrivilege 756 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4496	2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe
Token: SeDebugPrivilege	756	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe

description	pid	process	target process
PID 4496 wrote to memory of 756	4496	2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe	CTS.exe
PID 4496 wrote to memory of 756	4496	2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe	CTS.exe
PID 4496 wrote to memory of 756	4496	2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_53ed0426e33d002de2060681c22b8fb6_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4496

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:756

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
392KB

MD5
88234046422f6511f30525b9c9fab2b7

SHA1
b65f2f16edba7ddd43bc4b5a9c547c20a9d26fe9

SHA256
8d8a6db7b3f98ee1ec62f4a7c37375facd87c3580f8d9d3840629306e464a49f

SHA512
7d94874c4c57745e5b857460d8ca84c801c27176cc9d7bf3f7d5344251aa6881e2461a9ea172a9b655ffa27678ec9baf8da941686eb0df679a11a4720cdd1479

Download Submit
C:\Users\Admin\AppData\Local\Temp\OYx7boeA9eWv0Tw.exe
Filesize
71KB

MD5
8e0e6a4339c259cf1ad98c5202fedfef

SHA1
feecd7e4d63c4f965122c5da2d464c77c2b65612

SHA256
d174fcdeae9eb3e61ede33d4793a37e8e08566ef081a1edaedeed8f5f9287078

SHA512
d3e744249fe1f83497cb98e62f15c3c1dc131945de9bf4d7b933ff59fd8defd31281060bc085c9402c1302c8fd80d0785f146e4da7154679f6d5027376f18fca

Download Submit
C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit