Malware Analysis Report

2024-10-10 13:06

Sample ID 240621-2299javapb
Target 77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1
SHA256 77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1
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

77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1

Threat Level: Known bad

The file 77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1 was found to be: Known bad.

Malicious Activity Summary

rat dcrat infostealer

DCRat payload

Dcrat family

Process spawned unexpected child process

DcRat

DCRat payload

Loads dropped DLL

Executes dropped EXE

Checks computer location settings

Drops file in Program Files directory

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Uses Task Scheduler COM API

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Modifies registry class

Scheduled Task/Job: Scheduled Task

Suspicious behavior: GetForegroundWindowSpam

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-21 23:05

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

2024-06-21 23:05

Reported

2024-06-21 23:08

Platform

win7-20240221-en

Max time kernel

138s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.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

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:\MschainWinMonitor\bridgeComsession.exe N/A
N/A N/A C:\MschainWinMonitor\smss.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\5940a34987c991 C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Program Files (x86)\Reference Assemblies\Microsoft\dllhost.exe C:\MschainWinMonitor\bridgeComsession.exe N/A
File opened for modification C:\Program Files (x86)\Reference Assemblies\Microsoft\dllhost.exe C:\MschainWinMonitor\bridgeComsession.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\debug\WIA\lsass.exe C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Windows\debug\WIA\6203df4a6bafc7 C:\MschainWinMonitor\bridgeComsession.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

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\MschainWinMonitor\smss.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\MschainWinMonitor\bridgeComsession.exe N/A
Token: SeDebugPrivilege N/A C:\MschainWinMonitor\smss.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1812 wrote to memory of 2508 N/A C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe C:\Windows\SysWOW64\WScript.exe
PID 1812 wrote to memory of 2508 N/A C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe C:\Windows\SysWOW64\WScript.exe
PID 1812 wrote to memory of 2508 N/A C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe C:\Windows\SysWOW64\WScript.exe
PID 1812 wrote to memory of 2508 N/A C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe C:\Windows\SysWOW64\WScript.exe
PID 2508 wrote to memory of 2040 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2508 wrote to memory of 2040 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2508 wrote to memory of 2040 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2508 wrote to memory of 2040 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2040 wrote to memory of 2532 N/A C:\Windows\SysWOW64\cmd.exe C:\MschainWinMonitor\bridgeComsession.exe
PID 2040 wrote to memory of 2532 N/A C:\Windows\SysWOW64\cmd.exe C:\MschainWinMonitor\bridgeComsession.exe
PID 2040 wrote to memory of 2532 N/A C:\Windows\SysWOW64\cmd.exe C:\MschainWinMonitor\bridgeComsession.exe
PID 2040 wrote to memory of 2532 N/A C:\Windows\SysWOW64\cmd.exe C:\MschainWinMonitor\bridgeComsession.exe
PID 2532 wrote to memory of 2080 N/A C:\MschainWinMonitor\bridgeComsession.exe C:\Windows\System32\cmd.exe
PID 2532 wrote to memory of 2080 N/A C:\MschainWinMonitor\bridgeComsession.exe C:\Windows\System32\cmd.exe
PID 2532 wrote to memory of 2080 N/A C:\MschainWinMonitor\bridgeComsession.exe C:\Windows\System32\cmd.exe
PID 2080 wrote to memory of 1084 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\w32tm.exe
PID 2080 wrote to memory of 1084 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\w32tm.exe
PID 2080 wrote to memory of 1084 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\w32tm.exe
PID 2080 wrote to memory of 956 N/A C:\Windows\System32\cmd.exe C:\MschainWinMonitor\smss.exe
PID 2080 wrote to memory of 956 N/A C:\Windows\System32\cmd.exe C:\MschainWinMonitor\smss.exe
PID 2080 wrote to memory of 956 N/A C:\Windows\System32\cmd.exe C:\MschainWinMonitor\smss.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe

"C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe"

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\MschainWinMonitor\wNtcXu4nRlXtRhLUT8BLaW.vbe"

C:\Windows\SysWOW64\cmd.exe

cmd /c ""C:\MschainWinMonitor\eJgYKVcrvPR70qXlHyqbm5zJ.bat" "

C:\MschainWinMonitor\bridgeComsession.exe

"C:\MschainWinMonitor\bridgeComsession.exe"

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\dllhost.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Reference Assemblies\Microsoft\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'C:\MschainWinMonitor\csrss.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\MschainWinMonitor\csrss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "smsss" /sc MINUTE /mo 14 /tr "'C:\MschainWinMonitor\smss.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\MschainWinMonitor\smss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 11 /tr "'C:\Users\Default\Favorites\taskhost.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 7 /tr "'C:\Users\Default\Favorites\taskhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\taskhost.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "taskhostt" /sc MINUTE /mo 10 /tr "'C:\Users\Default User\taskhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 9 /tr "'C:\Users\Public\Libraries\cmd.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 12 /tr "'C:\Users\Public\Libraries\cmd.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\csrss.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\csrss.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'C:\Windows\debug\WIA\lsass.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\debug\WIA\lsass.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "lsassl" /sc MINUTE /mo 6 /tr "'C:\Windows\debug\WIA\lsass.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 5 /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\cmd.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "cmd" /sc ONLOGON /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\cmd.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "cmdc" /sc MINUTE /mo 11 /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\cmd.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "servicess" /sc MINUTE /mo 12 /tr "'C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\services.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "servicess" /sc MINUTE /mo 5 /tr "'C:\MSOCache\All Users\{90140000-0016-0409-0000-0000000FF1CE}-C\services.exe'" /rl HIGHEST /f

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\NPCLYSWDin.bat"

C:\Windows\system32\w32tm.exe

w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2

C:\MschainWinMonitor\smss.exe

"C:\MschainWinMonitor\smss.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 karapu4l.beget.tech udp
RU 5.101.152.137:80 karapu4l.beget.tech tcp
RU 5.101.152.137:80 karapu4l.beget.tech tcp

Files

C:\MschainWinMonitor\wNtcXu4nRlXtRhLUT8BLaW.vbe

MD5 591c2ae870b1bfdfa49c2e067da6e374
SHA1 42c56374c315095a7fc1259ba7794083f878310b
SHA256 0801892b154f7f95d3ce33f3da165a0ba1e842ad669b5ea8db795b790ac0d069
SHA512 85e364bf50e00e4faf09b2c3d202f1f244da5cec13d3664389eb8c6cf16048b5070e296ba57facdae24a3f075c85c790fd77ec9eeb5fddcc2d1e6a3f1198fab0

C:\MschainWinMonitor\eJgYKVcrvPR70qXlHyqbm5zJ.bat

MD5 cb15e7204a07edb961ac68a2e13b008c
SHA1 f59a6ce012c334ba811e594c5ba51185f5ff3d5a
SHA256 f560bf9e927a6c5c143fb814f2aa00b57cbf64f2ce54e93a91e17e153da6d05a
SHA512 6a2920f78fc28d40f5e0d968d72c95ffadc0b90f05457615ed99a989e163c312c0cf20116d2ffd3138f9810feb76eb0d4d0c00ce5c089707e40063f5e11bd6ea

C:\MschainWinMonitor\bridgeComsession.exe

MD5 ff83ff5839ae20a389ef45e3be78efd4
SHA1 9259010c8bc32b34545476b7b8b5a67b4e9a4da4
SHA256 186b894f3ae5d6c86ca5ac16b2c02485b25688bbac081e4a436cc9129a2e4f9f
SHA512 eb487aaf5af2192726bbefdb91edf743b7b5c6df9a8f148ab89f743027d3232b7a8ea51b0b1c4fea5749140278e7256972e0944d3b88ad1bb50c7849a3d901b0

memory/2532-13-0x0000000000390000-0x0000000000466000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\NPCLYSWDin.bat

MD5 fe28a1f9b4455572b95386899de10b4e
SHA1 e3bc7f78a840b9c55833b338265dafe5941e39cc
SHA256 a65e5542e967df82966f1d2ca067e7f665b7ff098ddd9f4b860743e358b19529
SHA512 2bfd7c3264cc991889b39519e8ad08e6480e28dd2d553858a029f0a67bf6cb1e1c5edb0c941d5fed550be7623379b1bd880e724abb9ee12d561f62ac57a197b1

memory/956-43-0x0000000001180000-0x0000000001256000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-21 23:05

Reported

2024-06-21 23:08

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.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

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-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation C:\Windows\SysWOW64\WScript.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation C:\MschainWinMonitor\bridgeComsession.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\MschainWinMonitor\bridgeComsession.exe N/A
N/A N/A C:\Users\Default\Local Settings\unsecapp.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files\MSBuild\RuntimeBroker.exe C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Program Files\MSBuild\9e8d7a4ca61bd9 C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Program Files\Windows Security\RuntimeBroker.exe C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Program Files\Windows Security\9e8d7a4ca61bd9 C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Program Files\Java\jre8\lib\dllhost.exe C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Program Files\Java\jre8\lib\5940a34987c991 C:\MschainWinMonitor\bridgeComsession.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\ModemLogs\wininit.exe C:\MschainWinMonitor\bridgeComsession.exe N/A
File opened for modification C:\Windows\ModemLogs\wininit.exe C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Windows\ModemLogs\56085415360792 C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Windows\Performance\conhost.exe C:\MschainWinMonitor\bridgeComsession.exe N/A
File created C:\Windows\Performance\088424020bedd6 C:\MschainWinMonitor\bridgeComsession.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Default\Local Settings\unsecapp.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\MschainWinMonitor\bridgeComsession.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Default\Local Settings\unsecapp.exe N/A

Uses Task Scheduler COM API

persistence

Processes

C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe

"C:\Users\Admin\AppData\Local\Temp\77f3663f1210d1e37a4cc58a71f211e8e0dc2116ad868ca9ff9914e918201ab1.exe"

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\MschainWinMonitor\wNtcXu4nRlXtRhLUT8BLaW.vbe"

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\MschainWinMonitor\eJgYKVcrvPR70qXlHyqbm5zJ.bat" "

C:\MschainWinMonitor\bridgeComsession.exe

"C:\MschainWinMonitor\bridgeComsession.exe"

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 5 /tr "'C:\Windows\ModemLogs\wininit.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 9 /tr "'C:\Windows\ModemLogs\wininit.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "TextInputHostT" /sc MINUTE /mo 6 /tr "'C:\Users\Default User\TextInputHost.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 10 /tr "'C:\Program Files\Windows Security\RuntimeBroker.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\Windows Security\RuntimeBroker.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 11 /tr "'C:\Program Files\Windows Security\RuntimeBroker.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 7 /tr "'C:\Users\Default\Local Settings\unsecapp.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "unsecappu" /sc MINUTE /mo 12 /tr "'C:\Users\Default\Local Settings\unsecapp.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Program Files\Java\jre8\lib\dllhost.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Program Files\Java\jre8\lib\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 13 /tr "'C:\Program Files\Java\jre8\lib\dllhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 8 /tr "'C:\Windows\Performance\conhost.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "conhostc" /sc MINUTE /mo 12 /tr "'C:\Windows\Performance\conhost.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 6 /tr "'C:\MschainWinMonitor\RuntimeBroker.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 13 /tr "'C:\MschainWinMonitor\RuntimeBroker.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 6 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Recovery\WindowsRE\wininit.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 8 /tr "'C:\Program Files\MSBuild\RuntimeBroker.exe'" /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Program Files\MSBuild\RuntimeBroker.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "RuntimeBrokerR" /sc MINUTE /mo 14 /tr "'C:\Program Files\MSBuild\RuntimeBroker.exe'" /rl HIGHEST /f

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "smsss" /sc MINUTE /mo 7 /tr "'C:\MschainWinMonitor\smss.exe'" /f

C:\Windows\system32\schtasks.exe

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

C:\Windows\system32\schtasks.exe

schtasks.exe /create /tn "smsss" /sc MINUTE /mo 6 /tr "'C:\MschainWinMonitor\smss.exe'" /rl HIGHEST /f

C:\Users\Default\Local Settings\unsecapp.exe

"C:\Users\Default\Local Settings\unsecapp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 karapu4l.beget.tech udp
RU 5.101.152.137:80 karapu4l.beget.tech tcp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
RU 5.101.152.137:80 karapu4l.beget.tech tcp
US 8.8.8.8:53 137.152.101.5.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 153.141.79.40.in-addr.arpa udp

Files

C:\MschainWinMonitor\wNtcXu4nRlXtRhLUT8BLaW.vbe

MD5 591c2ae870b1bfdfa49c2e067da6e374
SHA1 42c56374c315095a7fc1259ba7794083f878310b
SHA256 0801892b154f7f95d3ce33f3da165a0ba1e842ad669b5ea8db795b790ac0d069
SHA512 85e364bf50e00e4faf09b2c3d202f1f244da5cec13d3664389eb8c6cf16048b5070e296ba57facdae24a3f075c85c790fd77ec9eeb5fddcc2d1e6a3f1198fab0

C:\MschainWinMonitor\eJgYKVcrvPR70qXlHyqbm5zJ.bat

MD5 cb15e7204a07edb961ac68a2e13b008c
SHA1 f59a6ce012c334ba811e594c5ba51185f5ff3d5a
SHA256 f560bf9e927a6c5c143fb814f2aa00b57cbf64f2ce54e93a91e17e153da6d05a
SHA512 6a2920f78fc28d40f5e0d968d72c95ffadc0b90f05457615ed99a989e163c312c0cf20116d2ffd3138f9810feb76eb0d4d0c00ce5c089707e40063f5e11bd6ea

C:\MschainWinMonitor\bridgeComsession.exe

MD5 ff83ff5839ae20a389ef45e3be78efd4
SHA1 9259010c8bc32b34545476b7b8b5a67b4e9a4da4
SHA256 186b894f3ae5d6c86ca5ac16b2c02485b25688bbac081e4a436cc9129a2e4f9f
SHA512 eb487aaf5af2192726bbefdb91edf743b7b5c6df9a8f148ab89f743027d3232b7a8ea51b0b1c4fea5749140278e7256972e0944d3b88ad1bb50c7849a3d901b0

memory/6072-12-0x00007FFA71E53000-0x00007FFA71E55000-memory.dmp

memory/6072-13-0x0000000000DD0000-0x0000000000EA6000-memory.dmp