Malware Analysis Report

2024-10-16 03:30

Sample ID 220202-fc77zsgahr
Target 156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.sample
SHA256 156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673
Tags
darkside ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673

Threat Level: Known bad

The file 156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.sample was found to be: Known bad.

Malicious Activity Summary

darkside ransomware

DarkSide

Drops file in System32 directory

Modifies registry class

Opens file in notepad (likely ransom note)

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Modifies data under HKEY_USERS

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2022-02-02 04:44

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-02-02 04:44

Reported

2022-02-02 04:48

Platform

win7-en-20211208

Max time kernel

117s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

Signatures

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\Control Panel\International C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1072 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1072 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1072 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1072 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1072 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1072 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1072 wrote to memory of 1888 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 516 wrote to memory of 268 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 516 wrote to memory of 268 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 516 wrote to memory of 268 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 516 wrote to memory of 268 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 516 wrote to memory of 268 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 516 wrote to memory of 268 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 516 wrote to memory of 268 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 268 wrote to memory of 664 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 268 wrote to memory of 664 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 268 wrote to memory of 664 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 268 wrote to memory of 664 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 268 wrote to memory of 664 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 268 wrote to memory of 664 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 268 wrote to memory of 664 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

Network

N/A

Files

memory/1888-54-0x0000000075D61000-0x0000000075D63000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-02-02 04:44

Reported

2022-02-02 04:48

Platform

win10v2004-en-20220112

Max time kernel

168s

Max time network

158s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

Signatures

DarkSide

ransomware darkside

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 C:\Windows\SysWOW64\rundll32.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 C:\Windows\SysWOW64\rundll32.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\Control Panel\International C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ C:\Windows\SysWOW64\rundll32.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" C:\Windows\SysWOW64\rundll32.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" C:\Windows\SysWOW64\rundll32.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\bc654380\DefaultIcon C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\bc654380 C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\bc654380\DefaultIcon\ = "C:\\ProgramData\\bc654380.ico" C:\Windows\SysWOW64\rundll32.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.bc654380 C:\Windows\SysWOW64\rundll32.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.bc654380\ = "bc654380" C:\Windows\SysWOW64\rundll32.exe N/A

Opens file in notepad (likely ransom note)

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\NOTEPAD.EXE N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A
N/A N/A C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#1

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\SysWOW64\rundll32.exe

C:\Windows\SysWOW64\rundll32.exe C:\Users\Admin\AppData\Local\Temp\156335b95ba216456f1ac0894b7b9d6ad95404ac7df447940f21646ca0090673.dll,#3 worker0 job0-1620

C:\Windows\system32\NOTEPAD.EXE

"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\README.bc654380.TXT

Network

Country Destination Domain Proto
US 204.79.197.203:443 tcp
US 93.184.220.29:80 tcp
US 8.8.8.8:53 baroquetees.com udp

Files

C:\Users\Admin\Desktop\README.bc654380.TXT

MD5 135d0337c142e73417030daf30d835ac
SHA1 4d03e3db39adaf57df53181429706aa854878026
SHA256 f6fba207c71d1f53f82d96a87c25c4fa3c020dca58d9b8a266137f33597a0b0e
SHA512 b07fefbceeba5eddac04ecf011f347fd3879b77330d4db6178dd1daa54dbed956f90e28ecf93404e8c98f9683aac0fd238133d6188f2926475204556fc6a1403