Resubmissions

22-02-2022 16:11

220222-tm7absbhgj 10

17-02-2022 11:08

220217-m81w4sbah9 10

Analysis

  • max time kernel
    151s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    17-02-2022 11:08

General

  • Target

    core.bat

  • Size

    188B

  • MD5

    71bf630eea233e549a19dddb5a6b7d03

  • SHA1

    b93329214e0a9b9ab3af6fc553eb5a5c3601e009

  • SHA256

    b1614b1134030c9b6f1a2210050697f4f30efd8f5126a6ad735e9ae82ecc6b5b

  • SHA512

    08ffe8caacfe203e559f6a05cc07d4af603c7d081a18d46fc7c56966f3a2be7122392eef26b518540fa1c9cb43d7b206dd47140addcc2b271081c6332ca5fa46

Malware Config

Extracted

Family

icedid

rsa_pubkey.plain

Signatures

  • IcedID, BokBot

    IcedID is a banking trojan capable of stealing credentials.

  • Blocklisted process makes network request 3 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 7 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Discovers systems in the same network 1 TTPs 2 IoCs
  • Gathers network information 2 TTPs 1 IoCs

    Uses commandline utility to view network configuration.

  • Gathers system information 1 TTPs 1 IoCs

    Runs systeminfo.exe.

  • Modifies data under HKEY_USERS 55 IoCs
  • Modifies registry class 2 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\core.bat"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3708
    • C:\Windows\system32\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\hockey-x32.tmp,DllMain /i="license.dat"
      2⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Accesses Microsoft Outlook profiles
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      • outlook_office_path
      • outlook_win_path
      PID:1716
      • C:\Windows\system32\cmd.exe
        cmd.exe /c chcp >&2
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1844
        • C:\Windows\system32\chcp.com
          chcp
          4⤵
            PID:384
        • C:\Windows\System32\Wbem\WMIC.exe
          WMIC /Node:localhost /Namespace:\\root\SecurityCenter2 Path AntiVirusProduct Get * /Format:List
          3⤵
            PID:3712
          • C:\Windows\system32\ipconfig.exe
            ipconfig /all
            3⤵
            • Gathers network information
            PID:3260
          • C:\Windows\system32\systeminfo.exe
            systeminfo
            3⤵
            • Gathers system information
            PID:3396
          • C:\Windows\system32\net.exe
            net config workstation
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:2176
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 config workstation
              4⤵
                PID:3524
            • C:\Windows\system32\nltest.exe
              nltest /domain_trusts
              3⤵
                PID:768
              • C:\Windows\system32\nltest.exe
                nltest /domain_trusts /all_trusts
                3⤵
                  PID:3648
                • C:\Windows\system32\net.exe
                  net view /all /domain
                  3⤵
                  • Discovers systems in the same network
                  PID:3448
                • C:\Windows\system32\net.exe
                  net view /all
                  3⤵
                  • Discovers systems in the same network
                  PID:432
                • C:\Windows\system32\net.exe
                  net group "Domain Admins" /domain
                  3⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2432
                  • C:\Windows\system32\net1.exe
                    C:\Windows\system32\net1 group "Domain Admins" /domain
                    4⤵
                      PID:808
              • C:\Windows\system32\MusNotifyIcon.exe
                %systemroot%\system32\MusNotifyIcon.exe NotifyTrayIcon 13
                1⤵
                • Checks processor information in registry
                PID:1900
              • C:\Windows\System32\svchost.exe
                C:\Windows\System32\svchost.exe -k NetworkService -p
                1⤵
                • Drops file in Windows directory
                • Modifies data under HKEY_USERS
                PID:3208
              • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
                C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
                1⤵
                • Drops file in Windows directory
                • Suspicious use of AdjustPrivilegeToken
                PID:1772

              Network

              MITRE ATT&CK Enterprise v6

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Temp\sqlite64.dll

                MD5

                26d773a69f6fad3200d49a7aaa77752b

                SHA1

                3970ffe8aefe0c30daaec65b85fb103c0fc0f2a7

                SHA256

                fca6b7fe66ad9973f18f407e83b56dacd04197cbd35efc498a342d73d6a113e5

                SHA512

                0041b52514460dda19dd065fc46393f6fbe248a4c62fce28e0819abd952756996b34fdea286eb7814a7c868a12656a065278932760e61e53f7102b0dba324e4f

              • C:\Users\Admin\AppData\Roaming\license.dat

                MD5

                7eb64145636d2e8343d9077f15c11022

                SHA1

                c0b221ca05431092bc1c789a33d199124c8fec1c

                SHA256

                96e657e1face63798a43e6210dba8d8c2f618d0be1230b95ab59d8bd23fc165a

                SHA512

                53171e09d3d146fe02e481944e1c5481f1bb48eaf66259d1b8bbbbf7a83efc4a73fc28089c7e1eacf221620cdff6ea7f1049c17720181fde88b4bdc27c1ea9b6

              • memory/1716-131-0x00000226F3060000-0x00000226F30B9000-memory.dmp

                Filesize

                356KB

              • memory/1716-132-0x00000226F2D00000-0x00000226F2D06000-memory.dmp

                Filesize

                24KB