Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    30-05-2022 13:05

General

  • Target

    triage_dropped_file.exe

  • Size

    798KB

  • MD5

    fa6cb9677ff2254615166747668a72ed

  • SHA1

    e784bfd8f5f4514569205bb535ed8bc36ab47f28

  • SHA256

    4fe26ebfc5412205231040de3bf8f865da141f2c9c5c2c809e4bf6ceced43e55

  • SHA512

    e6e05225ecbf3e0157bc5b55980c17a7e9f61d36aadb172ae753b140c69b10f3e58d3a020e4225a25596b7aae586409e7c59e4ab2046e134ce5ccfc281484617

Malware Config

Extracted

Family

xloader

Version

2.6

Campaign

be4o

Decoy

laboratoriobioixcha.com

tictocperushop.online

wild-oceans.com

belaruscountry.com

kicktmall.com

fitcoinweb.tech

mores.one

gogear.one

gxrcksy.com

samrcq.com

impossible-icecream.com

bravesxx.com

bookchainart.com

sleepsolutionsofmboro.com

ocbrazilbusinessclub.com

advisor76.xyz

xitaotech.com

mgsdtytifgf3414.xyz

johnson-brown.net

cr3drt.com

Signatures

  • Xloader

    Xloader is a rebranded version of Formbook malware.

  • suricata: ET MALWARE FormBook CnC Checkin (GET)

    suricata: ET MALWARE FormBook CnC Checkin (GET)

  • suricata: ET MALWARE FormBook CnC Checkin (POST) M2

    suricata: ET MALWARE FormBook CnC Checkin (POST) M2

  • Xloader Payload 5 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Uses the VBS compiler for execution 1 TTPs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 56 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Drops file in Program Files directory
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3164
    • C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe
      "C:\Users\Admin\AppData\Local\Temp\triage_dropped_file.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2448
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:4156
    • C:\Windows\SysWOW64\cscript.exe
      "C:\Windows\SysWOW64\cscript.exe"
      2⤵
      • Adds policy Run key to start application
      • Blocklisted process makes network request
      • Suspicious use of SetThreadContext
      • Drops file in Program Files directory
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:3688
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
        3⤵
          PID:1240
        • C:\Windows\SysWOW64\cmd.exe
          /c copy "C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
          3⤵
            PID:4400
          • C:\Windows\SysWOW64\cmd.exe
            /c copy "C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Login Data" "C:\Users\Admin\AppData\Local\Temp\DB1" /V
            3⤵
              PID:2064
            • C:\Program Files\Mozilla Firefox\Firefox.exe
              "C:\Program Files\Mozilla Firefox\Firefox.exe"
              3⤵
                PID:4924
            • C:\Program Files (x86)\Ncx4\nbc4ane87nehalx8.exe
              "C:\Program Files (x86)\Ncx4\nbc4ane87nehalx8.exe"
              2⤵
              • Executes dropped EXE
              PID:2836

          Network

          MITRE ATT&CK Matrix ATT&CK v6

          Execution

          Scripting

          1
          T1064

          Persistence

          Registry Run Keys / Startup Folder

          1
          T1060

          Defense Evasion

          Modify Registry

          3
          T1112

          Scripting

          1
          T1064

          Credential Access

          Credentials in Files

          1
          T1081

          Collection

          Data from Local System

          1
          T1005

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Program Files (x86)\Ncx4\nbc4ane87nehalx8.exe
            Filesize

            2.5MB

            MD5

            9a4d8c6a3e71739c3657a18ceef2117d

            SHA1

            1ff6af964ff1418656fcbcf2693a984a02cd581a

            SHA256

            33fd95a47800d68452d614a4aaa56dd9c4dd97cddfadf0fb2531210da3c1d412

            SHA512

            295619ac15e7f7575c03c200da66cb9b248ccdba79bcd1b4be261fb0951947681ce7bc29f51b829a82983f50564b5557464821685f21cb641ae02252575abf67

          • C:\Program Files (x86)\Ncx4\nbc4ane87nehalx8.exe
            Filesize

            2.5MB

            MD5

            9a4d8c6a3e71739c3657a18ceef2117d

            SHA1

            1ff6af964ff1418656fcbcf2693a984a02cd581a

            SHA256

            33fd95a47800d68452d614a4aaa56dd9c4dd97cddfadf0fb2531210da3c1d412

            SHA512

            295619ac15e7f7575c03c200da66cb9b248ccdba79bcd1b4be261fb0951947681ce7bc29f51b829a82983f50564b5557464821685f21cb641ae02252575abf67

          • C:\Users\Admin\AppData\Local\Temp\DB1
            Filesize

            40KB

            MD5

            b608d407fc15adea97c26936bc6f03f6

            SHA1

            953e7420801c76393902c0d6bb56148947e41571

            SHA256

            b281ce54125d4250a80f48fcc02a8eea53f2c35c3b726e2512c3d493da0013bf

            SHA512

            cc96ddf4bf90d6aaa9d86803cb2aa30cd8e9b295aee1bd5544b88aeab63dc60bb1d4641e846c9771bab51aabbfbcd984c6d3ee83b96f5b65d09c0841d464b9e4

          • C:\Users\Admin\AppData\Local\Temp\DB1
            Filesize

            48KB

            MD5

            349e6eb110e34a08924d92f6b334801d

            SHA1

            bdfb289daff51890cc71697b6322aa4b35ec9169

            SHA256

            c9fd7be4579e4aa942e8c2b44ab10115fa6c2fe6afd0c584865413d9d53f3b2a

            SHA512

            2a635b815a5e117ea181ee79305ee1baf591459427acc5210d8c6c7e447be3513ead871c605eb3d32e4ab4111b2a335f26520d0ef8c1245a4af44e1faec44574

          • memory/1240-141-0x0000000000000000-mapping.dmp
          • memory/2064-151-0x0000000000000000-mapping.dmp
          • memory/2448-134-0x00007FFE537D0000-0x00007FFE54291000-memory.dmp
            Filesize

            10.8MB

          • memory/2448-130-0x0000000000AB0000-0x0000000000B7C000-memory.dmp
            Filesize

            816KB

          • memory/2448-131-0x00007FFE537D0000-0x00007FFE54291000-memory.dmp
            Filesize

            10.8MB

          • memory/2836-153-0x0000000000000000-mapping.dmp
          • memory/3164-138-0x0000000008620000-0x00000000086FF000-memory.dmp
            Filesize

            892KB

          • memory/3164-146-0x0000000002E80000-0x0000000002F31000-memory.dmp
            Filesize

            708KB

          • memory/3164-148-0x0000000002E80000-0x0000000002F31000-memory.dmp
            Filesize

            708KB

          • memory/3688-139-0x0000000000000000-mapping.dmp
          • memory/3688-145-0x0000000003020000-0x00000000030B0000-memory.dmp
            Filesize

            576KB

          • memory/3688-144-0x00000000031C0000-0x000000000350A000-memory.dmp
            Filesize

            3.3MB

          • memory/3688-147-0x00000000011A0000-0x00000000011CB000-memory.dmp
            Filesize

            172KB

          • memory/3688-143-0x00000000011A0000-0x00000000011CB000-memory.dmp
            Filesize

            172KB

          • memory/3688-142-0x0000000000290000-0x00000000002B7000-memory.dmp
            Filesize

            156KB

          • memory/4156-137-0x0000000001590000-0x00000000015A1000-memory.dmp
            Filesize

            68KB

          • memory/4156-140-0x0000000000400000-0x000000000042B000-memory.dmp
            Filesize

            172KB

          • memory/4156-136-0x0000000001A40000-0x0000000001D8A000-memory.dmp
            Filesize

            3.3MB

          • memory/4156-133-0x000000000041F270-mapping.dmp
          • memory/4156-132-0x0000000000400000-0x000000000042B000-memory.dmp
            Filesize

            172KB

          • memory/4400-149-0x0000000000000000-mapping.dmp