Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    23-06-2022 15:09

General

  • Target

    vbc.exe

  • Size

    757KB

  • MD5

    1f65d7826fbcc2d6c50f6c493c901588

  • SHA1

    4290f6b300595e807e8cacd5ff172b0a0f37c845

  • SHA256

    d0c85ba5e6d88e1e0b5f068f125829b4e224b90be2488f2c21317447dc51fb9e

  • SHA512

    e3c15d0229433441300b4e129748c10e966de22c926d641b665a91caf7c371a390004abc24d953a80887be4a791514e1670cb0e8723d6a19ffa5210cd9124f5a

Malware Config

Extracted

Family

xloader

Version

2.9

Campaign

v4qp

Decoy

je1XQKU1LfJPVLk=

nvf41a7FsTLs6uB/g+CR

U7mryF6DctZn6GEjr9Bm4g==

1SONGrPdh7wGEOXp3g==

2xX859r7qOFq7GYkr9Bm4g==

IYtzVUx0Oo0HmZawLQAARDvBf4dL

NH3iuBPNSzZTvpw/4KaG

rDehfiqIPbdMBS8G1g==

xhb2uJ0eBwo7k3djqxh60xoNt4VoeQ==

AFtKux3JgPGRkx3xUsciR6piSg==

m+3VoJadWcBvOAPpzKUNPoAxyplS

1DWKULdka3mxIKhEqGxQr7gxyplS

DGlFGBqWi5CtrCX9alyTuPzq

muvVM4slyTfxORwAZisVksCM78aSEVo=

D3biNgUbyg9E5pl+

/+1QLPssvl/Xxg==

I4lzTjaAcc1iBS8G1g==

wSwc4MmbShojhlZCrniTuPzq

jN5YO6ZXSfJPVLk=

4TUS4+ANuqHCRTM9sniTuPzq

Signatures

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • 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 4 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 45 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 21 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 WriteProcessMemory
    PID:2180
    • C:\Users\Admin\AppData\Local\Temp\vbc.exe
      "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4068
      • C:\Users\Admin\AppData\Local\Temp\vbc.exe
        "{path}"
        3⤵
        • Checks computer location settings
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        PID:428
    • C:\Windows\SysWOW64\wscript.exe
      "C:\Windows\SysWOW64\wscript.exe"
      2⤵
      • Adds policy Run key to start application
      • 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:4688
      • C:\Windows\SysWOW64\cmd.exe
        /c del "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
        3⤵
          PID:4912
        • 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:3232
          • 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:1656
            • C:\Program Files\Mozilla Firefox\Firefox.exe
              "C:\Program Files\Mozilla Firefox\Firefox.exe"
              3⤵
                PID:1092

          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

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          1
          T1082

          Collection

          Data from Local System

          1
          T1005

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • 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/428-141-0x0000000000400000-0x000000000042C000-memory.dmp
            Filesize

            176KB

          • memory/428-143-0x0000000001C30000-0x0000000001C41000-memory.dmp
            Filesize

            68KB

          • memory/428-142-0x00000000018E0000-0x0000000001C2A000-memory.dmp
            Filesize

            3.3MB

          • memory/428-138-0x0000000000000000-mapping.dmp
          • memory/428-139-0x0000000000400000-0x000000000042C000-memory.dmp
            Filesize

            176KB

          • memory/1656-156-0x0000000000000000-mapping.dmp
          • memory/2180-144-0x0000000007860000-0x00000000079DF000-memory.dmp
            Filesize

            1.5MB

          • memory/2180-151-0x0000000002700000-0x00000000027CD000-memory.dmp
            Filesize

            820KB

          • memory/2180-153-0x0000000002700000-0x00000000027CD000-memory.dmp
            Filesize

            820KB

          • memory/3232-154-0x0000000000000000-mapping.dmp
          • memory/4068-137-0x0000000004F80000-0x0000000004F8A000-memory.dmp
            Filesize

            40KB

          • memory/4068-136-0x00000000050E0000-0x000000000517C000-memory.dmp
            Filesize

            624KB

          • memory/4068-135-0x0000000004FA0000-0x0000000005032000-memory.dmp
            Filesize

            584KB

          • memory/4068-134-0x0000000005550000-0x0000000005AF4000-memory.dmp
            Filesize

            5.6MB

          • memory/4068-133-0x0000000000510000-0x00000000005D4000-memory.dmp
            Filesize

            784KB

          • memory/4688-152-0x0000000000700000-0x000000000072C000-memory.dmp
            Filesize

            176KB

          • memory/4688-150-0x00000000026E0000-0x0000000002770000-memory.dmp
            Filesize

            576KB

          • memory/4688-149-0x00000000028B0000-0x0000000002BFA000-memory.dmp
            Filesize

            3.3MB

          • memory/4688-147-0x0000000000D80000-0x0000000000DA7000-memory.dmp
            Filesize

            156KB

          • memory/4688-148-0x0000000000700000-0x000000000072C000-memory.dmp
            Filesize

            176KB

          • memory/4688-145-0x0000000000000000-mapping.dmp
          • memory/4912-146-0x0000000000000000-mapping.dmp