Resubmissions

22-02-2022 16:12

220222-tnl1saahc8 10

06-01-2022 15:26

220106-svf8fabda6 10

Analysis

  • max time kernel
    150s
  • max time network
    125s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    06-01-2022 15:26

General

  • Target

    core.bat

  • Size

    180B

  • MD5

    92ab94157586e3937dcfd7aaa380a7fb

  • SHA1

    74a326efc3c891877a8d2657d8a2fe3e37f059f7

  • SHA256

    dc74ad702adf3a1d49a4070915ffbd1b445c8f0ecfa42357a74380e34793f61d

  • SHA512

    44a54970a090f43c9dfa1865a0df0d5513cf3836d656f57a4c54d53847d8ada7e71265b53422ab7acbe1781a45742d8bbaa256cc275b514cbd773850cfadb77f

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
  • Enumerates physical storage devices 1 TTPs

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

  • 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 registry class 2 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 42 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:2448
    • C:\Windows\system32\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\surge-.dat,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:3032
      • C:\Windows\system32\cmd.exe
        cmd.exe /c chcp >&2
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:684
        • C:\Windows\system32\chcp.com
          chcp
          4⤵
            PID:1276
        • C:\Windows\System32\Wbem\WMIC.exe
          WMIC /Node:localhost /Namespace:\\root\SecurityCenter2 Path AntiVirusProduct Get * /Format:List
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2684
        • C:\Windows\system32\ipconfig.exe
          ipconfig /all
          3⤵
          • Gathers network information
          PID:1476
        • C:\Windows\system32\systeminfo.exe
          systeminfo
          3⤵
          • Gathers system information
          PID:1256
        • C:\Windows\system32\net.exe
          net config workstation
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2500
          • C:\Windows\system32\net1.exe
            C:\Windows\system32\net1 config workstation
            4⤵
              PID:3096
          • C:\Windows\system32\nltest.exe
            nltest /domain_trusts
            3⤵
              PID:3456
            • C:\Windows\system32\nltest.exe
              nltest /domain_trusts /all_trusts
              3⤵
                PID:1028
              • C:\Windows\system32\net.exe
                net view /all /domain
                3⤵
                • Discovers systems in the same network
                PID:1484
              • C:\Windows\system32\net.exe
                net view /all
                3⤵
                • Discovers systems in the same network
                PID:616
              • C:\Windows\system32\net.exe
                net group "Domain Admins" /domain
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:3160
                • C:\Windows\system32\net1.exe
                  C:\Windows\system32\net1 group "Domain Admins" /domain
                  4⤵
                    PID:1808

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

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

              MD5

              c7c45636ca690acdab7fba1e9d126f8b

              SHA1

              61376304cd90786813a80680a92cef03fedb6484

              SHA256

              cfc202b44509f2f607d365858a8218dfdc6b26f8087efcc5e46f4fef9ab53705

              SHA512

              9e6c7df9f70017b9eeb5868a358bc9eaf50de65dad04640220f380ff72e80bc303f034cb62929abb0c35d951b751732a131ae828c4c01cd1826610423f784db8

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

              MD5

              26d773a69f6fad3200d49a7aaa77752b

              SHA1

              3970ffe8aefe0c30daaec65b85fb103c0fc0f2a7

              SHA256

              fca6b7fe66ad9973f18f407e83b56dacd04197cbd35efc498a342d73d6a113e5

              SHA512

              0041b52514460dda19dd065fc46393f6fbe248a4c62fce28e0819abd952756996b34fdea286eb7814a7c868a12656a065278932760e61e53f7102b0dba324e4f

            • memory/616-129-0x0000000000000000-mapping.dmp

            • memory/684-119-0x0000000000000000-mapping.dmp

            • memory/1028-127-0x0000000000000000-mapping.dmp

            • memory/1256-123-0x0000000000000000-mapping.dmp

            • memory/1276-120-0x0000000000000000-mapping.dmp

            • memory/1476-122-0x0000000000000000-mapping.dmp

            • memory/1484-128-0x0000000000000000-mapping.dmp

            • memory/1808-131-0x0000000000000000-mapping.dmp

            • memory/2500-124-0x0000000000000000-mapping.dmp

            • memory/2684-121-0x0000000000000000-mapping.dmp

            • memory/3032-118-0x000002167A3F0000-0x000002167A427000-memory.dmp

              Filesize

              220KB

            • memory/3032-115-0x0000000000000000-mapping.dmp

            • memory/3032-117-0x000002167A480000-0x000002167A4D9000-memory.dmp

              Filesize

              356KB

            • memory/3096-125-0x0000000000000000-mapping.dmp

            • memory/3160-130-0x0000000000000000-mapping.dmp

            • memory/3456-126-0x0000000000000000-mapping.dmp