9f184c9901ac8811bc8e6f3f5a4e9fd5ee6fe7acdb4b7aaf62a96cce7d6c369b

Analysis

max time kernel
66s
max time network
51s
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 14:26

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General

Target

2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe
Size

71KB
MD5

2599509e71ccdf14b0ee631105ce927d
SHA1

ecec9baa97a7580211965ae43dd1a8cbd16493ff
SHA256

9f184c9901ac8811bc8e6f3f5a4e9fd5ee6fe7acdb4b7aaf62a96cce7d6c369b
SHA512

c0bcc9e0c3eeb7664e1f155e67a6b2e7866faf45271d5b60f5bcad6f98eba9af0691e197d142f575fdae9101bb7143421ade6223508ef61859123beca6913c81
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTW:ZhpAyazIlyazTW

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

1568 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
1568	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_2599509e71ccdf14b0ee631105ce927d_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_2599509e71ccdf14b0ee631105ce927d_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_2599509e71ccdf14b0ee631105ce927d_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 4032 2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe
Token: SeDebugPrivilege 1568 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	4032	2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe
Token: SeDebugPrivilege	1568	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe

description	pid	process	target process
PID 4032 wrote to memory of 1568	4032	2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe	CTS.exe
PID 4032 wrote to memory of 1568	4032	2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe	CTS.exe
PID 4032 wrote to memory of 1568	4032	2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_2599509e71ccdf14b0ee631105ce927d_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4032

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:1568

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Office\16.0\excel.exe_Rules.xml
Filesize
393KB

MD5
e4a8a8d78f2f73761123982bb5a24804

SHA1
00554720c9d44b57cc9512c60c12e2150d1ba397

SHA256
429cb5436237b712901460a859bf4005ae932cc425e04c5e832cb9b6bf00fdcd

SHA512
f583c29252db6fdece280a843547d81a36d4ec809cb9eb6e203f7c380c80c41af566540d6f6865c100eb42b255c06b19a51bcbdbf24946f457bbdf7180b3f1ba

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C:\Users\Admin\AppData\Local\Temp\1wVSRHdmd5WoOc9.exe
Filesize
71KB

MD5
1403d309c61ad50d0dc5458421bb5433

SHA1
ba995a046f1636a99df6d37aa27bb05a560c54f1

SHA256
f67ff43369467cf071da3a5a0f9a0d78d6b33981fd0981b9b67c255ebf0116d6

SHA512
4ebff60997e14f687764bd8c7b1a3d9682584a2307b6447818ab59bdaed4056b2e822f827460d2f257fe601432f618222d91077a474194baf20d03cf278a324e

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit