Analysis

  • max time kernel
    150s
  • max time network
    30s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    05-05-2023 20:56

General

  • Target

    rundll64.exe

  • Size

    236KB

  • MD5

    4165a3dba3c7ac26b225f8623f70ebaa

  • SHA1

    587df43d63da7dfd726a4bb8f39877647cc07da0

  • SHA256

    523d97331fcef84ff767dbb01836766d8b1be9bbeb3d76e9fda3a02ad46fd976

  • SHA512

    43ad74651aad95f16bd17f6fea857534c6c6502cb0c06262092e7b10ab59a27b663565668d6fd4436c72a114f632ab6940fc4f1914d165eba7e5a8a8b5743b8e

  • SSDEEP

    6144:qb/A0SeQu0hL2cyBt2iOjese1HSCRhECwt6:q8D5P2ICsDCRhQ6

Malware Config

Signatures

  • Phobos

    Phobos ransomware appeared at the beginning of 2019.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Modifies Windows Firewall 1 TTPs 2 IoCs
  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops desktop.ini file(s) 3 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 47 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\rundll64.exe
    "C:\Users\Admin\AppData\Local\Temp\rundll64.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:284
    • C:\Users\Admin\AppData\Local\Temp\rundll64.exe
      "C:\Users\Admin\AppData\Local\Temp\rundll64.exe"
      2⤵
        PID:924
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:608
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:768
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:1268
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:1216
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled no
          3⤵
          • Modifies boot configuration data using bcdedit
          PID:1196
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          3⤵
          • Deletes backup catalog
          PID:1984
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:564
        • C:\Windows\system32\netsh.exe
          netsh advfirewall set currentprofile state off
          3⤵
          • Modifies Windows Firewall
          PID:1832
        • C:\Windows\system32\netsh.exe
          netsh firewall set opmode mode=disable
          3⤵
          • Modifies Windows Firewall
          PID:700
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1844
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1184
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:1936
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
          PID:884

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\OWOW64WW.cab.id[A94330E5-3093].[[email protected]].eking

          Filesize

          23.5MB

          MD5

          57929ab7556a5965c35638df972e5f05

          SHA1

          02814a3feb4799e6784fc1fadb596b5843215330

          SHA256

          be86996d87cd619ad96e00cff7543883a7034a8d8bb467b95a28c9f40aa488de

          SHA512

          1e893768f2c03965430bbbc457fce5810df66c7d2b1684d7abc8ec3784b3eec9b7f5a9b4ff27b1b47f6df4da377c85e4b7c1486deb3579465205d8b114b56c8b

        • memory/284-164-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-55-0x0000000000030000-0x000000000003F000-memory.dmp

          Filesize

          60KB

        • memory/284-173-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-64-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-180-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-108-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-157-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-304-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-60-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-629-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-54-0x0000000000020000-0x000000000002C000-memory.dmp

          Filesize

          48KB

        • memory/284-324-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-337-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-404-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-423-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/284-445-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB

        • memory/924-56-0x0000000000400000-0x00000000047C2000-memory.dmp

          Filesize

          67.8MB