Malware Analysis Report

2024-12-07 03:32

Sample ID 241113-asxhjatfpq
Target 018292540-SuratTeguranPPI-20230814215304.PDF
SHA256 19ea9d81975410116f668db902265e8e3c3381655692de707aa1b37ab84484c1
Tags
remcos host discovery evasion execution rat trojan
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 Overview

score
10/10

SHA256

19ea9d81975410116f668db902265e8e3c3381655692de707aa1b37ab84484c1

Threat Level: Known bad

The file 018292540-SuratTeguranPPI-20230814215304.PDF was found to be: Known bad.

Malicious Activity Summary

remcos host discovery evasion execution rat trojan

UAC bypass

Remcos family

Remcos

Windows security bypass

Looks for VirtualBox Guest Additions in registry

Looks for VMWare Tools registry key

Command and Scripting Interpreter: PowerShell

Checks BIOS information in registry

Windows security modification

Checks whether UAC is enabled

Maps connected drives based on registry

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

System policy modification

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 00:29

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-13 00:29

Reported

2024-11-13 00:30

Platform

win11-20241007-en

Max time kernel

49s

Max time network

46s

Command Line

"C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe"

Signatures

Remcos

rat remcos

Remcos family

remcos

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Windows security bypass

evasion trojan
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe = "0" C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Looks for VirtualBox Guest Additions in registry

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Looks for VMWare Tools registry key

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Checks BIOS information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Windows security modification

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe = "0" C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Maps connected drives based on registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0 C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 396 set thread context of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Program Files (x86)\Windows Mail\wab.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Windows Mail\wab.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 396 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 396 wrote to memory of 2104 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 3564 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 4460 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 4460 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 396 wrote to memory of 4460 N/A C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe C:\Program Files (x86)\Windows Mail\wab.exe

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe

"C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\018292540-SuratTeguranPPI-20230814215304.exe" -Force

C:\Program Files (x86)\Windows Mail\wab.exe

"C:\Program Files (x86)\Windows Mail\wab.exe"

C:\Program Files (x86)\Windows Mail\wab.exe

"C:\Program Files (x86)\Windows Mail\wab.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 oyo.work.gd udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 154.216.20.185:3142 oyo.work.gd tcp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/396-0-0x00007FF935933000-0x00007FF935935000-memory.dmp

memory/396-1-0x000001E2FBB90000-0x000001E2FBB98000-memory.dmp

memory/396-2-0x00007FF935930000-0x00007FF9363F2000-memory.dmp

memory/396-3-0x00007FF935930000-0x00007FF9363F2000-memory.dmp

memory/396-4-0x000001E2FE210000-0x000001E2FE2DE000-memory.dmp

memory/3564-5-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3564-6-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3564-7-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2104-8-0x00007FF935930000-0x00007FF9363F2000-memory.dmp

memory/3564-12-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2104-13-0x00007FF935930000-0x00007FF9363F2000-memory.dmp

memory/3564-9-0x0000000000400000-0x000000000047F000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uruxwlye.qas.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2104-22-0x00000244ED4B0000-0x00000244ED4D2000-memory.dmp

memory/2104-23-0x00007FF935930000-0x00007FF9363F2000-memory.dmp

memory/3564-24-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3564-25-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2104-28-0x00007FF935930000-0x00007FF9363F2000-memory.dmp

memory/396-29-0x00007FF935930000-0x00007FF9363F2000-memory.dmp

memory/3564-31-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3564-30-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3564-32-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3564-37-0x0000000000400000-0x000000000047F000-memory.dmp

C:\ProgramData\pdf\logs.dat

MD5 baa9b884b548d476bd03bc4138adf75d
SHA1 401ee7848552335ffb254dd7263cd5d408dda2db
SHA256 c36f57e113cd5100b90adc933ade428c936783ea70c530622cd5a6f0cc81cc5e
SHA512 86a1eee58fd87adcd6dc8ee1dfd344de25b5bf56e85102493d5dab9496ca83ce76ce32c6c994faed92e0d9d70a93c429b16e4663bac41056e5c1379ed6fc9940

memory/3564-43-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3564-42-0x0000000000400000-0x000000000047F000-memory.dmp