23ad36ea83c7aa91a923b634fc1192e1c68a69aef065ae870d9cdd7cc3e7b170

Analysis

max time kernel
67s
max time network
53s
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 15:23

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General

Target

2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe
Size

72KB
MD5

063a9b8516cb66c31fb2eb3b5c582ddc
SHA1

e4a5fa43112d449de432c530715cadea014289d3
SHA256

23ad36ea83c7aa91a923b634fc1192e1c68a69aef065ae870d9cdd7cc3e7b170
SHA512

f4a525e589366f53f8ddff88d60d3912f40fa78ef79fcfc0a188ec64dfabca4a5a7210ea5a041523a28c385f531b6f5cd64d4cd5b793b17e32338551eeb76d8c
SSDEEP

1536:Fc897UsWjcd9w+AyabjDbxE+MwmvlDuazTli:ZhpAyazIlyazTli

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

3844 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
3844	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_063a9b8516cb66c31fb2eb3b5c582ddc_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_063a9b8516cb66c31fb2eb3b5c582ddc_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_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3008 2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe
Token: SeDebugPrivilege 3844 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3008	2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe
Token: SeDebugPrivilege	3844	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe

description	pid	process	target process
PID 3008 wrote to memory of 3844	3008	2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe	CTS.exe
PID 3008 wrote to memory of 3844	3008	2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe	CTS.exe
PID 3008 wrote to memory of 3844	3008	2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_063a9b8516cb66c31fb2eb3b5c582ddc_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3008

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:3844

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

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Downloads

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

MD5
ae5dc906ad0fff22517537866079c70f

SHA1
df22e135b6511ba3f0120813dab67db9cdf98ab8

SHA256
d3eb12135426d346adb9eb9b0b0962b72c279216af568dc2c2e650d57e4f1013

SHA512
81d94507381d242258ec23fe9c0e0021fc6244f88b85e8a11d51bdc0ff8125282c4b49135451a3040ce321fd8983e835e0733f7e189759704f23ff3144c3b185

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C:\Users\Admin\AppData\Local\Temp\vCnMdh9lfaXwc0b.exe
Filesize
72KB

MD5
a1f88b99761b6871b6b9cac13f8f4325

SHA1
63459ac01d2af45d9eb5ac37e33f421031ceecd8

SHA256
a081eb013c67fd739ffa864247ffbac30871abb63adda71a5bb8880e7af99624

SHA512
92d23e18566c76bf3596e56bac0ebc1388295eab16c28410e3789dc7971e4c852e57955f6aec0c0155220e62a23e367245c1b097b0be2966e43fa1afe49563e5

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C:\Windows\CTS.exe
Filesize
71KB

MD5
66df4ffab62e674af2e75b163563fc0b

SHA1
dec8a197312e41eeb3cfef01cb2a443f0205cd6e

SHA256
075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

SHA512
1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

Download Submit