Analysis

  • max time kernel
    138s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231023-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/11/2023, 05:49

General

  • Target

    NEAS.8a3f7accb656f787354b8280323176a0.exe

  • Size

    783KB

  • MD5

    8a3f7accb656f787354b8280323176a0

  • SHA1

    c9544d9107ed710954bf4b575598cc392d567f26

  • SHA256

    32b2a8994267885e9c2e1b70dfe03a088e45714f90f9aab8c5c89649dba6b80f

  • SHA512

    c81e198a992c469d5e533cc35a7604fc00097b2c2d4bf0ebed85487f4d9708c8adca543ebf11963d464e007379bc7e62a00bdca84d7dec79b7cefbaa9775bb7e

  • SSDEEP

    12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:G+OQbpbgsFdAyQvzSqaq8q

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 6 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • UAC bypass 3 TTPs 3 IoCs
  • DCRat payload 2 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Adds Run key to start application 2 TTPs 6 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Drops file in System32 directory 7 IoCs
  • Drops file in Windows directory 2 IoCs
  • Creates scheduled task(s) 1 TTPs 6 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • System policy modification 1 TTPs 3 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\NEAS.8a3f7accb656f787354b8280323176a0.exe
    "C:\Users\Admin\AppData\Local\Temp\NEAS.8a3f7accb656f787354b8280323176a0.exe"
    1⤵
    • UAC bypass
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • System policy modification
    PID:112
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\PerfLogs\TextInputHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2984
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\TimeBrokerServer\dllhost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3116
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sysmon" /sc ONLOGON /tr "'C:\Windows\bootstat\sysmon.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3948
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\ProgramData\SoftwareDistribution\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4104
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "backgroundTaskHost" /sc ONLOGON /tr "'C:\Windows\System32\appidsvc\backgroundTaskHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:3928
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\netttcim_uninstall\unsecapp.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:4576

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Windows\System32\appidsvc\backgroundTaskHost.exe

          Filesize

          783KB

          MD5

          8a3f7accb656f787354b8280323176a0

          SHA1

          c9544d9107ed710954bf4b575598cc392d567f26

          SHA256

          32b2a8994267885e9c2e1b70dfe03a088e45714f90f9aab8c5c89649dba6b80f

          SHA512

          c81e198a992c469d5e533cc35a7604fc00097b2c2d4bf0ebed85487f4d9708c8adca543ebf11963d464e007379bc7e62a00bdca84d7dec79b7cefbaa9775bb7e

        • memory/112-15-0x0000000002760000-0x0000000002768000-memory.dmp

          Filesize

          32KB

        • memory/112-24-0x000000001B2B0000-0x000000001B2B8000-memory.dmp

          Filesize

          32KB

        • memory/112-3-0x0000000000DF0000-0x0000000000DF8000-memory.dmp

          Filesize

          32KB

        • memory/112-4-0x0000000000E00000-0x0000000000E08000-memory.dmp

          Filesize

          32KB

        • memory/112-13-0x0000000002740000-0x0000000002748000-memory.dmp

          Filesize

          32KB

        • memory/112-6-0x0000000000E20000-0x0000000000E28000-memory.dmp

          Filesize

          32KB

        • memory/112-7-0x00000000026E0000-0x00000000026EC000-memory.dmp

          Filesize

          48KB

        • memory/112-8-0x00000000026F0000-0x00000000026FA000-memory.dmp

          Filesize

          40KB

        • memory/112-9-0x0000000002710000-0x000000000271A000-memory.dmp

          Filesize

          40KB

        • memory/112-10-0x0000000002700000-0x0000000002708000-memory.dmp

          Filesize

          32KB

        • memory/112-11-0x0000000002720000-0x0000000002728000-memory.dmp

          Filesize

          32KB

        • memory/112-12-0x0000000002730000-0x0000000002738000-memory.dmp

          Filesize

          32KB

        • memory/112-2-0x000000001B3F0000-0x000000001B400000-memory.dmp

          Filesize

          64KB

        • memory/112-14-0x0000000002750000-0x0000000002758000-memory.dmp

          Filesize

          32KB

        • memory/112-5-0x0000000000E10000-0x0000000000E20000-memory.dmp

          Filesize

          64KB

        • memory/112-16-0x0000000002770000-0x0000000002778000-memory.dmp

          Filesize

          32KB

        • memory/112-17-0x0000000002780000-0x0000000002788000-memory.dmp

          Filesize

          32KB

        • memory/112-18-0x0000000002790000-0x0000000002798000-memory.dmp

          Filesize

          32KB

        • memory/112-20-0x000000001B3F0000-0x000000001B400000-memory.dmp

          Filesize

          64KB

        • memory/112-19-0x00000000027A0000-0x00000000027A8000-memory.dmp

          Filesize

          32KB

        • memory/112-21-0x00000000027B0000-0x00000000027B8000-memory.dmp

          Filesize

          32KB

        • memory/112-23-0x000000001B3F0000-0x000000001B400000-memory.dmp

          Filesize

          64KB

        • memory/112-22-0x00000000027C0000-0x00000000027CC000-memory.dmp

          Filesize

          48KB

        • memory/112-0-0x0000000000570000-0x000000000063A000-memory.dmp

          Filesize

          808KB

        • memory/112-29-0x000000001B3F0000-0x000000001B400000-memory.dmp

          Filesize

          64KB

        • memory/112-1-0x00007FFC70320000-0x00007FFC70DE1000-memory.dmp

          Filesize

          10.8MB

        • memory/112-41-0x000000001B3F0000-0x000000001B400000-memory.dmp

          Filesize

          64KB

        • memory/112-55-0x00007FFC70320000-0x00007FFC70DE1000-memory.dmp

          Filesize

          10.8MB