Malware Analysis Report

2024-10-10 13:01

Sample ID 240618-vdgtrasapa
Target 4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe
SHA256 4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9
Tags
rat dcrat infostealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9

Threat Level: Known bad

The file 4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe was found to be: Known bad.

Malicious Activity Summary

rat dcrat infostealer

Dcrat family

Process spawned unexpected child process

DcRat

DCRat payload

DCRat payload

Loads dropped DLL

Checks computer location settings

Executes dropped EXE

Drops file in Program Files directory

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

Uses Task Scheduler COM API

Modifies registry class

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-18 16:52

Signatures

DCRat payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Dcrat family

dcrat

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-18 16:52

Reported

2024-06-18 16:54

Platform

win7-20240419-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe"

Signatures

DcRat

rat infostealer dcrat

Process spawned unexpected child process

Description Indicator Process Target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe

DCRat payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Browserbrokersvc\SurrogateReview.exe N/A
N/A N/A C:\Users\Default User\sppsvc.exe N/A

Loads dropped DLL

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

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\RedistList\System.exe C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\RedistList\27d1bcfc3c54e0 C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Program Files\Uninstall Information\explorer.exe C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Program Files\Uninstall Information\7a0fd90576e088 C:\Browserbrokersvc\SurrogateReview.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Fonts\wininit.exe C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Windows\Fonts\56085415360792 C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Windows\AppPatch\AppPatch64\wininit.exe C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Windows\AppPatch\AppPatch64\56085415360792 C:\Browserbrokersvc\SurrogateReview.exe N/A

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A
N/A N/A C:\Windows\system32\schtasks.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Browserbrokersvc\SurrogateReview.exe N/A
N/A N/A C:\Users\Default User\sppsvc.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Browserbrokersvc\SurrogateReview.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Default User\sppsvc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1700 wrote to memory of 2296 N/A C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe C:\Windows\SysWOW64\WScript.exe
PID 1700 wrote to memory of 2296 N/A C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe C:\Windows\SysWOW64\WScript.exe
PID 1700 wrote to memory of 2296 N/A C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe C:\Windows\SysWOW64\WScript.exe
PID 1700 wrote to memory of 2296 N/A C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe C:\Windows\SysWOW64\WScript.exe
PID 2296 wrote to memory of 2668 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2296 wrote to memory of 2668 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2296 wrote to memory of 2668 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2296 wrote to memory of 2668 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2668 wrote to memory of 2788 N/A C:\Windows\SysWOW64\cmd.exe C:\Browserbrokersvc\SurrogateReview.exe
PID 2668 wrote to memory of 2788 N/A C:\Windows\SysWOW64\cmd.exe C:\Browserbrokersvc\SurrogateReview.exe
PID 2668 wrote to memory of 2788 N/A C:\Windows\SysWOW64\cmd.exe C:\Browserbrokersvc\SurrogateReview.exe
PID 2668 wrote to memory of 2788 N/A C:\Windows\SysWOW64\cmd.exe C:\Browserbrokersvc\SurrogateReview.exe
PID 2788 wrote to memory of 1776 N/A C:\Browserbrokersvc\SurrogateReview.exe C:\Users\Default User\sppsvc.exe
PID 2788 wrote to memory of 1776 N/A C:\Browserbrokersvc\SurrogateReview.exe C:\Users\Default User\sppsvc.exe
PID 2788 wrote to memory of 1776 N/A C:\Browserbrokersvc\SurrogateReview.exe C:\Users\Default User\sppsvc.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe

"C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe"

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Browserbrokersvc\3y1KXih899nQln49Z.vbe"

C:\Windows\SysWOW64\cmd.exe

cmd /c ""C:\Browserbrokersvc\oOeNfDumm.bat" "

C:\Browserbrokersvc\SurrogateReview.exe

"C:\Browserbrokersvc\SurrogateReview.exe"

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Browserbrokersvc\csrss.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Browserbrokersvc\csrss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 13 /tr "'C:\Browserbrokersvc\csrss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SurrogateReviewS" /sc MINUTE /mo 6 /tr "'C:\Users\All Users\Documents\SurrogateReview.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SurrogateReview" /sc ONLOGON /tr "'C:\Users\All Users\Documents\SurrogateReview.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SurrogateReviewS" /sc MINUTE /mo 14 /tr "'C:\Users\All Users\Documents\SurrogateReview.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 10 /tr "'C:\Windows\Fonts\wininit.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\Fonts\wininit.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 11 /tr "'C:\Windows\Fonts\wininit.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 14 /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\lsass.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\lsass.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 12 /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\lsass.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 7 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\RedistList\System.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\RedistList\System.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\v3.5\RedistList\System.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\csrss.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\MSOCache\All Users\{90140000-0044-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'C:\Browserbrokersvc\System.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "System" /sc ONLOGON /tr "'C:\Browserbrokersvc\System.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SystemS" /sc MINUTE /mo 12 /tr "'C:\Browserbrokersvc\System.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 11 /tr "'C:\Windows\AppPatch\AppPatch64\wininit.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\AppPatch\AppPatch64\wininit.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\Windows\AppPatch\AppPatch64\wininit.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\Users\Default User\sppsvc.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Users\Default User\sppsvc.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 13 /tr "'C:\Users\Default User\sppsvc.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 14 /tr "'C:\Browserbrokersvc\cmd.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Browserbrokersvc\cmd.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 5 /tr "'C:\Browserbrokersvc\cmd.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "explorere" /sc MINUTE /mo 10 /tr "'C:\Program Files\Uninstall Information\explorer.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Program Files\Uninstall Information\explorer.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "explorere" /sc MINUTE /mo 9 /tr "'C:\Program Files\Uninstall Information\explorer.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsml" /sc MINUTE /mo 6 /tr "'C:\Users\Default\Links\lsm.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Users\Default\Links\lsm.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsml" /sc MINUTE /mo 13 /tr "'C:\Users\Default\Links\lsm.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "explorere" /sc MINUTE /mo 8 /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\explorer.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "explorer" /sc ONLOGON /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\explorer.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "explorere" /sc MINUTE /mo 12 /tr "'C:\Recovery\07daf2c2-fe8f-11ee-804d-f636db4e28e7\explorer.exe'" /rl HIGHEST /f

C:\Users\Default User\sppsvc.exe

"C:\Users\Default User\sppsvc.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 a0994533.xsph.ru udp
RU 141.8.192.93:80 a0994533.xsph.ru tcp

Files

C:\Browserbrokersvc\3y1KXih899nQln49Z.vbe

MD5 9dfc48bf369960d5c21d15ba3a1c316b
SHA1 e65c01e0b9c9195a26e8ba62a98c47d18b47ffda
SHA256 f819f7be0f1632c9745dabe976276c32552491369e16a334ef8e64394c1897e0
SHA512 f2ae68909f0117016d0ee55fee9fd176449606031f52018de4f83ec60d7b8336ab83698c1c6cea1b6b060226799f6a4317c9e9e130e67d4d4a579c0a7dc00833

C:\Browserbrokersvc\oOeNfDumm.bat

MD5 8baf3afcfd0b9b99ffbbcdf9716f583d
SHA1 68c59251fe8c356ab8fc47db55a4b872de9795d0
SHA256 fc76147436c411814d9ee80dca9d9af0c67bcee59e9513e912a89322a8343706
SHA512 46ecbb36806f670fb850c839db6fe72ffe21361b7a1edad444f6e50cd21a9d2810afa54f9babeba056a4b6b8187ea0db61a8854e3b3c4a70a4ba92c05c64a140

\Browserbrokersvc\SurrogateReview.exe

MD5 aac537dd9bdd5e971c412a81cc7d05b0
SHA1 4fac4c447725162660fbe405d52a22ed54065f58
SHA256 938ee50908041d657958d7f13ef8c24d57566e18bd4db0af132ba5b438da9ec0
SHA512 cdfe34cfb15679255ad991ace237dc722a55eb0cedcb77135d5aad46e985ff41460c23cfc424c6720a25e8ca07911b3920e42c0f9491f79e3f53d1d44c67a26f

memory/2788-13-0x0000000000D10000-0x0000000000DE6000-memory.dmp

memory/1776-46-0x0000000000060000-0x0000000000136000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-18 16:52

Reported

2024-06-18 16:54

Platform

win10v2004-20240508-en

Max time kernel

62s

Max time network

51s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe"

Signatures

DcRat

rat infostealer dcrat

Process spawned unexpected child process

Description Indicator Process Target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process N/A C:\Windows\system32\schtasks.exe

DCRat payload

rat
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Windows\SysWOW64\WScript.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Browserbrokersvc\SurrogateReview.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Browserbrokersvc\SurrogateReview.exe N/A
N/A N/A C:\Browserbrokersvc\sihost.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\Common Files\System\55b276f4edf653 C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Program Files\Windows Defender\de-DE\dllhost.exe C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Program Files\Windows Defender\de-DE\5940a34987c991 C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Program Files\Common Files\System\StartMenuExperienceHost.exe C:\Browserbrokersvc\SurrogateReview.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\security\EDP\Logs\5940a34987c991 C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Windows\OCR\en-us\SurrogateReview.exe C:\Browserbrokersvc\SurrogateReview.exe N/A
File created C:\Windows\security\EDP\Logs\dllhost.exe C:\Browserbrokersvc\SurrogateReview.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Browserbrokersvc\SurrogateReview.exe N/A
Token: SeDebugPrivilege N/A C:\Browserbrokersvc\sihost.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe

"C:\Users\Admin\AppData\Local\Temp\4931e5d3811a460f47678631f4bdc82c9c6e9176ae3940403e690bc82e3714a9.exe"

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Browserbrokersvc\3y1KXih899nQln49Z.vbe"

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Browserbrokersvc\oOeNfDumm.bat" "

C:\Browserbrokersvc\SurrogateReview.exe

"C:\Browserbrokersvc\SurrogateReview.exe"

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 11 /tr "'C:\Users\Default\Recent\dllhost.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Default\Recent\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Users\Default\Recent\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 11 /tr "'C:\Users\All Users\Packages\Microsoft.SkypeApp_kzf8qxf38zg5c\S-1-5-21-1337824034-2731376981-3755436523-1000\SppExtComObj.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Users\All Users\Packages\Microsoft.SkypeApp_kzf8qxf38zg5c\S-1-5-21-1337824034-2731376981-3755436523-1000\SppExtComObj.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "SppExtComObjS" /sc MINUTE /mo 10 /tr "'C:\Users\All Users\Packages\Microsoft.SkypeApp_kzf8qxf38zg5c\S-1-5-21-1337824034-2731376981-3755436523-1000\SppExtComObj.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 7 /tr "'C:\Program Files\Common Files\System\StartMenuExperienceHost.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Program Files\Common Files\System\StartMenuExperienceHost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "StartMenuExperienceHostS" /sc MINUTE /mo 8 /tr "'C:\Program Files\Common Files\System\StartMenuExperienceHost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 8 /tr "'C:\Browserbrokersvc\sihost.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "sihost" /sc ONLOGON /tr "'C:\Browserbrokersvc\sihost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "sihosts" /sc MINUTE /mo 11 /tr "'C:\Browserbrokersvc\sihost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 9 /tr "'C:\Program Files\Windows Defender\de-DE\dllhost.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\de-DE\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 7 /tr "'C:\Program Files\Windows Defender\de-DE\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Windows\security\EDP\Logs\dllhost.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\security\EDP\Logs\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 6 /tr "'C:\Windows\security\EDP\Logs\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 5 /tr "'C:\Recovery\WindowsRE\Registry.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\Registry.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RegistryR" /sc MINUTE /mo 11 /tr "'C:\Recovery\WindowsRE\Registry.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "servicess" /sc MINUTE /mo 5 /tr "'C:\Users\Admin\Local Settings\services.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\Users\Admin\Local Settings\services.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "servicess" /sc MINUTE /mo 10 /tr "'C:\Users\Admin\Local Settings\services.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Users\Public\csrss.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Public\csrss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Users\Public\csrss.exe'" /rl HIGHEST /f

C:\Browserbrokersvc\sihost.exe

"C:\Browserbrokersvc\sihost.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 a0994533.xsph.ru udp
US 8.8.8.8:53 a0994533.xsph.ru udp

Files

C:\Browserbrokersvc\3y1KXih899nQln49Z.vbe

MD5 9dfc48bf369960d5c21d15ba3a1c316b
SHA1 e65c01e0b9c9195a26e8ba62a98c47d18b47ffda
SHA256 f819f7be0f1632c9745dabe976276c32552491369e16a334ef8e64394c1897e0
SHA512 f2ae68909f0117016d0ee55fee9fd176449606031f52018de4f83ec60d7b8336ab83698c1c6cea1b6b060226799f6a4317c9e9e130e67d4d4a579c0a7dc00833

C:\Browserbrokersvc\oOeNfDumm.bat

MD5 8baf3afcfd0b9b99ffbbcdf9716f583d
SHA1 68c59251fe8c356ab8fc47db55a4b872de9795d0
SHA256 fc76147436c411814d9ee80dca9d9af0c67bcee59e9513e912a89322a8343706
SHA512 46ecbb36806f670fb850c839db6fe72ffe21361b7a1edad444f6e50cd21a9d2810afa54f9babeba056a4b6b8187ea0db61a8854e3b3c4a70a4ba92c05c64a140

C:\Browserbrokersvc\SurrogateReview.exe

MD5 aac537dd9bdd5e971c412a81cc7d05b0
SHA1 4fac4c447725162660fbe405d52a22ed54065f58
SHA256 938ee50908041d657958d7f13ef8c24d57566e18bd4db0af132ba5b438da9ec0
SHA512 cdfe34cfb15679255ad991ace237dc722a55eb0cedcb77135d5aad46e985ff41460c23cfc424c6720a25e8ca07911b3920e42c0f9491f79e3f53d1d44c67a26f

memory/3704-12-0x00007FF840763000-0x00007FF840765000-memory.dmp

memory/3704-13-0x0000000000DA0000-0x0000000000E76000-memory.dmp