Analysis

  • max time kernel
    22s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    13-12-2024 09:18

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

    Using powershell.exe command.

  • 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:2504
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2912
    • 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:2856
    • 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:2632
    • 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:1768
    • 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:1264
    • 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:2624
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" os get Caption
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:1088
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1784
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1244
    • 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:536
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      "wmic" path win32_VideoController get name
      2⤵
      • System Location Discovery: System Language Discovery
      • Detects videocard installed
      PID:2184
    • 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:708
      • 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:1100

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    7KB

    MD5

    ad8c0647a7980e27d796aca56d30c937

    SHA1

    d83bcd8819f2b122298cf8d036886c6aaafebcd2

    SHA256

    f38997a65697bb310a5e77bf3ae0596f4f35d3bb8084556dd94c6b171e6ac9f4

    SHA512

    dcf34fe6832a02662b5c779167f6b4487eaa7eb1db0c5fb35edf196236dc1b523a8c9c83dcd2dcc5ce29e8393286940a78f6db13480412661a7a2d4467d5ae9e

  • memory/2504-7-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-65-0x0000000001350000-0x0000000001B94000-memory.dmp

    Filesize

    8.3MB

  • memory/2504-2-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-9-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-8-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-13-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-6-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-5-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-4-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-0-0x0000000001350000-0x0000000001B94000-memory.dmp

    Filesize

    8.3MB

  • memory/2504-10-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-11-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-3-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-17-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-18-0x0000000001350000-0x0000000001B94000-memory.dmp

    Filesize

    8.3MB

  • memory/2504-19-0x0000000001350000-0x0000000001B94000-memory.dmp

    Filesize

    8.3MB

  • memory/2504-20-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-12-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-36-0x0000000001350000-0x0000000001B94000-memory.dmp

    Filesize

    8.3MB

  • memory/2504-37-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-58-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-64-0x0000000077180000-0x00000000771C7000-memory.dmp

    Filesize

    284KB

  • memory/2504-1-0x000000007718E000-0x000000007718F000-memory.dmp

    Filesize

    4KB