6eaa71d6e78d1dfa6ec35bdd635d3a3eae71c73ae97ea90cb5ff6f5911a8145a

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
24-05-2024 16:33

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General

Target

2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe
Size

71KB
MD5

a1c475b1af8aef6f1a60000e831d267b
SHA1

9336f3594bb53abec8b47f7999f0ed2e611957b5
SHA256

6eaa71d6e78d1dfa6ec35bdd635d3a3eae71c73ae97ea90cb5ff6f5911a8145a
SHA512

aed864272d090864f60ecac5defdc89a859022606dfa3fba4b2e67780ec99e6d5cf661c2d3c05d074a921f03411a9f2198027396115e2654ff97962a76982127
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTq:ZRpAyazIliazTq

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4568 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
4568	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-24_a1c475b1af8aef6f1a60000e831d267b_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:

2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 2668 2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe
Token: SeDebugPrivilege 4568 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	2668	2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe
Token: SeDebugPrivilege	4568	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe

description	pid	process	target process
PID 2668 wrote to memory of 4568	2668	2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe	CTS.exe
PID 2668 wrote to memory of 4568	2668	2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe	CTS.exe
PID 2668 wrote to memory of 4568	2668	2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-24_a1c475b1af8aef6f1a60000e831d267b_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2668

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:4568

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
394KB

MD5
caa83df04f00730ed18006b56b3c5a17

SHA1
09d53c542ae91332cbfcfc8030aaedfae308c389

SHA256
ac24448d9ccd76d28025beff69a9e4cdc71cc2a8a7eaa01c56f791419995ed2a

SHA512
7338e033875543a936403da154d8e6837d8657db99ad76d78177e0e0b62909014b9247a1a5e8b5eaf87d468036e02fc80bdf13d1fd14d697073ddda51555b3fe

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C:\Users\Admin\AppData\Local\Temp\K5PFhqEO907U9xX.exe
Filesize
71KB

MD5
851836332a049aa428417293b198a650

SHA1
4860f08876b07bc54788bc47552ff5ea61dd4423

SHA256
560dc73d057f3855e26e47b940c47627b88b87af7e1b789529623e4754934033

SHA512
62fc2926c45bcd127728fc69ff3040bfa309afaebaf84fe3d287fb2b3fd771856111c53339812e89ffa95d145ca701a31ea98245479200636aaa5f860e0e75d5

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C:\Windows\CTS.exe
Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit