d1ea8e410b417935ed16a97430ed018d705c113f7a9e192be32b04330c65c2f2

Analysis

max time kernel
67s
max time network
50s
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 23:23

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General

Target

2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe
Size

71KB
MD5

54b817024a4828af6b4dfa37213b62c3
SHA1

8f610eb699e047f9d68ef0cd1ce349c296f3ad43
SHA256

d1ea8e410b417935ed16a97430ed018d705c113f7a9e192be32b04330c65c2f2
SHA512

d7ddef8eda0fbd7c61f57268758222320fea6741142ff09173e959ccb20e415b25b2f61d159db2d1b125a0680ffebbc0ee742a2cf15a8ed2d9f1e65650cbce48
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTBIu:ZRpAyazIliazTOu

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4068 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
4068	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_54b817024a4828af6b4dfa37213b62c3_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_54b817024a4828af6b4dfa37213b62c3_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_54b817024a4828af6b4dfa37213b62c3_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 1936 2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe
Token: SeDebugPrivilege 4068 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	1936	2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe
Token: SeDebugPrivilege	4068	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe

description	pid	process	target process
PID 1936 wrote to memory of 4068	1936	2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe	CTS.exe
PID 1936 wrote to memory of 4068	1936	2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe	CTS.exe
PID 1936 wrote to memory of 4068	1936	2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-28_54b817024a4828af6b4dfa37213b62c3_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1936

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:4068

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
e57217c80ced94ee0dffc5df2a92c84e

SHA1
12e6e07c2cf1b200aafa510851e5cbf96886f3e6

SHA256
4c651ebf187b8ef35ccc609a252ddf8ccf5e89d29e3327ae9e03033df7c782ee

SHA512
11bb0212f113af1cc30294ee9d2d3a9a503518332771f530725e6ea343ec2abc27eeea7b9b764dac6d36e048e13874adb5c316659e88d0489c3e2aa72a77f2e3

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C:\Users\Admin\AppData\Local\Temp\NzFGUk8ejdO09Ue.exe

Filesize
71KB

MD5
c96d865a5d1810852e671ae5d1460fe8

SHA1
c64245624a6547a3035b8f7ff0f9757306960b2b

SHA256
0256162a35bcf620ac65e307a71c833588cd4eb5aad4a08d8b52aaade3741f60

SHA512
51069e2c448b8455a9e321698a50e245f4625fbafeaa6e43fdd06ac28e577a6232d0769a326e7ad27da7bce5d19ce0b614a83cb4adfa1f445df83d695ed31071

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

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