d21df160b38e060e6552b89534a2e88f8b919a526a095a4307f0823db3e49b08

Analysis

max time kernel
94s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
27-05-2024 06:31

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General

Target

2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
Size

71KB
MD5

6f9920cf81c169dd0e4dad7ffedd4785
SHA1

33f22f894b423c7956701307f6a7fb1721ad7756
SHA256

d21df160b38e060e6552b89534a2e88f8b919a526a095a4307f0823db3e49b08
SHA512

99dff00a65ed5c37d6b86e949618c2bf4aa00b076f44befa21d04301c3c1fa3653278001b28571d5d0677b92804fbb78ca4930571ba82da24757b3639c7d036c
SSDEEP

1536:Fc8N7UsWjcd9w+AyabjDbxE+MwmvlzuazTG:ZRpAyazIliazTG

Score

7^/10

persistence spyware stealer

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

CTS.exe

pid process

4768 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
4768	CTS.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exeCTS.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\CTS = "C:\\Windows\\CTS.exe"	2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_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:

2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exeCTS.exe

description ioc process

File created C:\Windows\CTS.exe 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
File created C:\Windows\CTS.exe CTS.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exeCTS.exe

description pid process

Token: SeDebugPrivilege 3816 2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
Token: SeDebugPrivilege 4768 CTS.exe

description	ioc	process
File created	C:\Windows\CTS.exe	2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
File created	C:\Windows\CTS.exe	CTS.exe

description	pid	process
Token: SeDebugPrivilege	3816	2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
Token: SeDebugPrivilege	4768	CTS.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe

description	pid	process	target process
PID 3816 wrote to memory of 4768	3816	2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe	CTS.exe
PID 3816 wrote to memory of 4768	3816	2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe	CTS.exe
PID 3816 wrote to memory of 4768	3816	2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe	CTS.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-27_6f9920cf81c169dd0e4dad7ffedd4785_bkransomware.exe"
1⤵
- Adds Run key to start application
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3816

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:4768

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

Replay Monitor

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Downloads

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

Filesize
394KB

MD5
6f74ef06da2705ffba5d7000ab5861a5

SHA1
bac6daccfad5377ece8b0c3a8094213cc8b02b79

SHA256
0b19d2417ab6b6f489bc3b43bb67068c0cf054343fe99d51bca13a84cf1cec58

SHA512
c5261ae42c1be608e8cf78e144bde806ffe4998880314119317f78fe52fe993a467797975f35cdf3de2ec64d62f18485a21cfc5cba234083e5d32911372cf9ed

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C:\Users\Admin\AppData\Local\Temp\YSpBEsdHRLRAzC5.exe

Filesize
71KB

MD5
c02588eaf463b4f412e15a401bf24062

SHA1
73a460e4952628d15e0c5a49b9fbedb366b08589

SHA256
d3f871c7e9436e6bb878654719059308a5588de2ec7e1ee1d2b4a2edef0d6a9d

SHA512
30d6fb1d4723c8a2cbb100370c822df4747ae009ef1c2056083d0e8a73d8eb151e94cbffe42bfa51ac101b54e6655290f4682bfd84fabe4f7793391c6bcfca5b

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C:\Windows\CTS.exe

Filesize
71KB

MD5
f9d4ab0a726adc9b5e4b7d7b724912f1

SHA1
3d42ca2098475924f70ee4a831c4f003b4682328

SHA256
b43be87e8586ca5e995979883468f3b3d9dc5212fbfd0b5f3341a5b7c56e0fbc

SHA512
22a5f0e4b2716244e978ee50771823926f86baf0382ece48fd049f039cf77b5eb0691d83c61148903cff081fdbea969f47b8ed521647717f42bbed5c64552432

Download Submit