Analysis

  • max time kernel
    148s
  • max time network
    190s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    26-08-2021 18:16

General

  • Target

    PI_55034455.xlsx

  • Size

    1.3MB

  • MD5

    b677902aa5e2126451dc6258e35d99f5

  • SHA1

    2325d8d4c12de4fcd6b29c152cf4017983730198

  • SHA256

    4b2e04f07ddbbc25db9260eac2de0d8ce45488b3a2c80de9c384b1abb014bbbd

  • SHA512

    e7b2fb8dad97742f85aa935bcde585d1876c79600804f969c8667c2011250b194fb3dc2b505d444a8210590182b2213ace2c09e5fed7f9e370d955796f0fd8d8

Malware Config

Extracted

Family

xloader

Version

2.3

Campaign

ecuu

C2

http://www.polaritelibrairie.com/ecuu/

Decoy

buoy8boats.com

tomrings.com

o-distribs.com

majesticgroupinc.com

tehridam.com

yzwjtoys.com

castro-online.run

aquarius-twins.com

jamesrrossfineart.com

pavarasupatthonkol.com

rivermarketdentistry.com

gyiblrjd.icu

redcountrypodcast.com

youngbrotherspharmacyga.com

betsysobiech.com

neocleanpro.com

ingpatrimoine.com

mustangsallytransportation.com

jsvfcxzn.com

krsfpjuoekcd.info

Signatures

  • ModiLoader, DBatLoader

    ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.

  • 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 Terse alphanumeric executable downloader high likelihood of being hostile

    suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

  • Xloader Payload 3 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 9 IoCs
  • Modifies registry key 1 TTPs 3 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1220
    • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\PI_55034455.xlsx
      2⤵
      • Enumerates system info in registry
      • Modifies Internet Explorer settings
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      PID:1140
    • C:\Windows\SysWOW64\wininit.exe
      "C:\Windows\SysWOW64\wininit.exe"
      2⤵
      • Adds policy Run key to start application
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      PID:1360
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Blocklisted process makes network request
    • Loads dropped DLL
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:268
    • C:\Users\Public\vbc.exe
      "C:\Users\Public\vbc.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:540
      • C:\Program Files (x86)\internet explorer\ieinstal.exe
        "C:\Program Files (x86)\internet explorer\ieinstal.exe"
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:1740
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Public\Trast.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:552
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K C:\Users\Public\UKO.bat
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1708
          • C:\Windows\SysWOW64\reg.exe
            reg delete hkcu\Environment /v windir /f
            5⤵
            • Modifies registry key
            PID:876
          • C:\Windows\SysWOW64\reg.exe
            reg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\KDECO.bat reg delete hkcu\Environment /v windir /f && REM "
            5⤵
            • Modifies registry key
            PID:888
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
            5⤵
              PID:1060
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Public\nest.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1216
          • C:\Windows\SysWOW64\reg.exe
            reg delete hkcu\Environment /v windir /f
            4⤵
            • Modifies registry key
            PID:1516

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scripting

    1
    T1064

    Exploitation for Client Execution

    1
    T1203

    Persistence

    Registry Run Keys / Startup Folder

    2
    T1060

    Defense Evasion

    Modify Registry

    4
    T1112

    Scripting

    1
    T1064

    Discovery

    Query Registry

    1
    T1012

    System Information Discovery

    1
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Public\Trast.bat
      MD5

      4068c9f69fcd8a171c67f81d4a952a54

      SHA1

      4d2536a8c28cdcc17465e20d6693fb9e8e713b36

      SHA256

      24222300c78180b50ed1f8361ba63cb27316ec994c1c9079708a51b4a1a9d810

      SHA512

      a64f9319acc51fffd0491c74dcd9c9084c2783b82f95727e4bfe387a8528c6dcf68f11418e88f1e133d115daf907549c86dd7ad866b2a7938add5225fbb2811d

    • C:\Users\Public\UKO.bat
      MD5

      eaf8d967454c3bbddbf2e05a421411f8

      SHA1

      6170880409b24de75c2dc3d56a506fbff7f6622c

      SHA256

      f35f2658455a2e40f151549a7d6465a836c33fa9109e67623916f889849eac56

      SHA512

      fe5be5c673e99f70c93019d01abb0a29dd2ecf25b2d895190ff551f020c28e7d8f99f65007f440f0f76c5bcac343b2a179a94d190c938ea3b9e1197890a412e9

    • C:\Users\Public\nest.bat
      MD5

      8ada51400b7915de2124baaf75e3414c

      SHA1

      1a7b9db12184ab7fd7fce1c383f9670a00adb081

      SHA256

      45aa3957c29865260a78f03eef18ae9aebdbf7bea751ecc88be4a799f2bb46c7

      SHA512

      9afc138157a4565294ca49942579cdb6f5d8084e56f9354738de62b585f4c0fa3e7f2cbc9541827f2084e3ff36c46eed29b46f5dd2444062ffcd05c599992e68

    • C:\Users\Public\vbc.exe
      MD5

      47fa27443cb1abe987ca9f653754b6d0

      SHA1

      886a56f419a6e4bc65c603089ee9e9d4f6ad7a54

      SHA256

      a9010421ea97c10ab6147e6c5077fab296030b13c26b6645502b6165e2e9d4db

      SHA512

      7dd0b2d5a3716a7ea88f4ca621dc55ec5e3d8a7111e3f373d4631dcdb17c858753e2c55e1723e8c16501ba0d86cc2778cb01bf3ffb791563aa014ef94142e4ac

    • C:\Users\Public\vbc.exe
      MD5

      47fa27443cb1abe987ca9f653754b6d0

      SHA1

      886a56f419a6e4bc65c603089ee9e9d4f6ad7a54

      SHA256

      a9010421ea97c10ab6147e6c5077fab296030b13c26b6645502b6165e2e9d4db

      SHA512

      7dd0b2d5a3716a7ea88f4ca621dc55ec5e3d8a7111e3f373d4631dcdb17c858753e2c55e1723e8c16501ba0d86cc2778cb01bf3ffb791563aa014ef94142e4ac

    • \Users\Public\vbc.exe
      MD5

      47fa27443cb1abe987ca9f653754b6d0

      SHA1

      886a56f419a6e4bc65c603089ee9e9d4f6ad7a54

      SHA256

      a9010421ea97c10ab6147e6c5077fab296030b13c26b6645502b6165e2e9d4db

      SHA512

      7dd0b2d5a3716a7ea88f4ca621dc55ec5e3d8a7111e3f373d4631dcdb17c858753e2c55e1723e8c16501ba0d86cc2778cb01bf3ffb791563aa014ef94142e4ac

    • \Users\Public\vbc.exe
      MD5

      47fa27443cb1abe987ca9f653754b6d0

      SHA1

      886a56f419a6e4bc65c603089ee9e9d4f6ad7a54

      SHA256

      a9010421ea97c10ab6147e6c5077fab296030b13c26b6645502b6165e2e9d4db

      SHA512

      7dd0b2d5a3716a7ea88f4ca621dc55ec5e3d8a7111e3f373d4631dcdb17c858753e2c55e1723e8c16501ba0d86cc2778cb01bf3ffb791563aa014ef94142e4ac

    • \Users\Public\vbc.exe
      MD5

      47fa27443cb1abe987ca9f653754b6d0

      SHA1

      886a56f419a6e4bc65c603089ee9e9d4f6ad7a54

      SHA256

      a9010421ea97c10ab6147e6c5077fab296030b13c26b6645502b6165e2e9d4db

      SHA512

      7dd0b2d5a3716a7ea88f4ca621dc55ec5e3d8a7111e3f373d4631dcdb17c858753e2c55e1723e8c16501ba0d86cc2778cb01bf3ffb791563aa014ef94142e4ac

    • \Users\Public\vbc.exe
      MD5

      47fa27443cb1abe987ca9f653754b6d0

      SHA1

      886a56f419a6e4bc65c603089ee9e9d4f6ad7a54

      SHA256

      a9010421ea97c10ab6147e6c5077fab296030b13c26b6645502b6165e2e9d4db

      SHA512

      7dd0b2d5a3716a7ea88f4ca621dc55ec5e3d8a7111e3f373d4631dcdb17c858753e2c55e1723e8c16501ba0d86cc2778cb01bf3ffb791563aa014ef94142e4ac

    • memory/268-62-0x0000000075D41000-0x0000000075D43000-memory.dmp
      Filesize

      8KB

    • memory/540-67-0x0000000000000000-mapping.dmp
    • memory/540-71-0x00000000001B0000-0x00000000001B1000-memory.dmp
      Filesize

      4KB

    • memory/540-73-0x0000000000260000-0x000000000027B000-memory.dmp
      Filesize

      108KB

    • memory/552-77-0x0000000000000000-mapping.dmp
    • memory/876-81-0x0000000000000000-mapping.dmp
    • memory/888-82-0x0000000000000000-mapping.dmp
    • memory/1060-83-0x0000000000000000-mapping.dmp
    • memory/1140-98-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1140-61-0x000000005FFF0000-0x0000000060000000-memory.dmp
      Filesize

      64KB

    • memory/1140-59-0x000000002F611000-0x000000002F614000-memory.dmp
      Filesize

      12KB

    • memory/1140-60-0x0000000070F91000-0x0000000070F93000-memory.dmp
      Filesize

      8KB

    • memory/1216-94-0x0000000000000000-mapping.dmp
    • memory/1220-88-0x0000000004FA0000-0x0000000005098000-memory.dmp
      Filesize

      992KB

    • memory/1220-97-0x0000000006AA0000-0x0000000006BCC000-memory.dmp
      Filesize

      1.2MB

    • memory/1360-92-0x0000000001FC0000-0x00000000022C3000-memory.dmp
      Filesize

      3.0MB

    • memory/1360-89-0x0000000000000000-mapping.dmp
    • memory/1360-90-0x00000000004A0000-0x00000000004BA000-memory.dmp
      Filesize

      104KB

    • memory/1360-91-0x00000000000C0000-0x00000000000E9000-memory.dmp
      Filesize

      164KB

    • memory/1360-93-0x00000000004C0000-0x000000000054F000-memory.dmp
      Filesize

      572KB

    • memory/1516-96-0x0000000000000000-mapping.dmp
    • memory/1708-79-0x0000000000000000-mapping.dmp
    • memory/1740-76-0x0000000000000000-mapping.dmp
    • memory/1740-86-0x00000000021C0000-0x00000000024C3000-memory.dmp
      Filesize

      3.0MB

    • memory/1740-84-0x00000000000A0000-0x00000000000A1000-memory.dmp
      Filesize

      4KB

    • memory/1740-85-0x0000000010410000-0x0000000010439000-memory.dmp
      Filesize

      164KB

    • memory/1740-87-0x0000000000200000-0x0000000000210000-memory.dmp
      Filesize

      64KB