Analysis

  • max time kernel
    150s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-01-2023 20:30

General

  • Target

    vbc.exe

  • Size

    24KB

  • MD5

    28cfc00452c4e3e6c0082fdca3c520fc

  • SHA1

    1260166c856aee0225371c7ab269f3a228cf8fb5

  • SHA256

    93b17c9c6d764b7e218d2d1669e8bd68059da3fe346936071b012d22d52fb35e

  • SHA512

    8413d173f55e5fe9d8fd415fd1f9e76358916ee1de5d1e6dbab3a1b18b0848011e76f7a2ee332f4fca64e8dcb26a8d1492c8d1ebe9ad165eba84c8dda6065af8

  • SSDEEP

    96:IEfPqlezZjTldKYgr+Doo+HzQLCmNeit3l/kSw6k7l6xiRQe3T3erAo00wGvzNt:IEfPql6VpJ/oGlL/kHH7l6Ej7e

Malware Config

Signatures

  • Detects Smokeloader packer 3 IoCs
  • SmokeLoader

    Modular backdoor trojan in use since 2014.

  • Executes dropped EXE 3 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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
  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 13 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 53 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\vbc.exe
    "C:\Users\Admin\AppData\Local\Temp\vbc.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3168
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4724
    • C:\Users\Admin\AppData\Local\Temp\vbc.exe
      C:\Users\Admin\AppData\Local\Temp\vbc.exe
      2⤵
        PID:1524
      • C:\Users\Admin\AppData\Local\Temp\vbc.exe
        C:\Users\Admin\AppData\Local\Temp\vbc.exe
        2⤵
          PID:1080
        • C:\Users\Admin\AppData\Local\Temp\vbc.exe
          C:\Users\Admin\AppData\Local\Temp\vbc.exe
          2⤵
          • Checks SCSI registry key(s)
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          PID:1296
      • C:\Users\Admin\AppData\Local\Temp\AB72.exe
        C:\Users\Admin\AppData\Local\Temp\AB72.exe
        1⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1700
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
          2⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:772
        • C:\Users\Admin\AppData\Local\Temp\AB72.exe
          C:\Users\Admin\AppData\Local\Temp\AB72.exe
          2⤵
          • Executes dropped EXE
          PID:1272
        • C:\Users\Admin\AppData\Local\Temp\AB72.exe
          C:\Users\Admin\AppData\Local\Temp\AB72.exe
          2⤵
          • Executes dropped EXE
          • Accesses Microsoft Outlook profiles
          • Adds Run key to start application
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • outlook_office_path
          • outlook_win_path
          PID:3396
      • C:\Windows\SysWOW64\explorer.exe
        C:\Windows\SysWOW64\explorer.exe
        1⤵
        • Accesses Microsoft Outlook profiles
        PID:3644
      • C:\Windows\explorer.exe
        C:\Windows\explorer.exe
        1⤵
          PID:3472
        • C:\Windows\SysWOW64\explorer.exe
          C:\Windows\SysWOW64\explorer.exe
          1⤵
            PID:5012
          • C:\Windows\explorer.exe
            C:\Windows\explorer.exe
            1⤵
              PID:3140
            • C:\Windows\SysWOW64\explorer.exe
              C:\Windows\SysWOW64\explorer.exe
              1⤵
                PID:4848
              • C:\Windows\explorer.exe
                C:\Windows\explorer.exe
                1⤵
                  PID:2108

                Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

                • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\AB72.exe.log
                  Filesize

                  1KB

                  MD5

                  3a9188331a78f1dbce606db64b841fcb

                  SHA1

                  8e2c99b7c477d06591a856a4ea3e1e214719eee8

                  SHA256

                  db4137e258a0f6159fda559a5f6dd2704be0582c3f0586f65040c7ad1eb68451

                  SHA512

                  d1a994610a045d89d5d306866c24ae56bf16555414b8f63f632552568e67b5586f26d5a17a1f0a55ada376730298e6d856e9161828d4eae9decfa4e015e0e90a

                • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
                  Filesize

                  1KB

                  MD5

                  4280e36a29fa31c01e4d8b2ba726a0d8

                  SHA1

                  c485c2c9ce0a99747b18d899b71dfa9a64dabe32

                  SHA256

                  e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

                  SHA512

                  494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

                • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
                  Filesize

                  53KB

                  MD5

                  06ad34f9739c5159b4d92d702545bd49

                  SHA1

                  9152a0d4f153f3f40f7e606be75f81b582ee0c17

                  SHA256

                  474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

                  SHA512

                  c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

                • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
                  Filesize

                  16KB

                  MD5

                  55f19b3fe95df191f14e36784330408e

                  SHA1

                  6410fee868aa0f5a3e830cd8246f97879e6616b9

                  SHA256

                  09b2aca520343d5fc3ba33120b240e321d46527ac0e02ddd11a6cd2e8f32f812

                  SHA512

                  1a4496cf366bf0c26ffacf5e4277a15b36cc53bbb8825175e07c5057f9fefa6ed059950c4f5ab93fd03fb40aae8d982d002e687a5c3e4f5fa839a735308b8b16

                • C:\Users\Admin\AppData\Local\Temp\AB72.exe
                  Filesize

                  24KB

                  MD5

                  ee87d669bdaf3fe239b86f4f76bab467

                  SHA1

                  a3d79efbb199aebb263db11a054ee1e5692be607

                  SHA256

                  f305a627115059bb9d66df01e558c00c6e2e5fff6e93c33299f069699dd893ac

                  SHA512

                  bcff0489ff29f14c69e63a490372069c3dfc740a1df7f9b2566f3d7a74e1f8be1a3722a51c481076362c9ca18aa094905a178d08a525269e769438853d407175

                • C:\Users\Admin\AppData\Local\Temp\AB72.exe
                  Filesize

                  24KB

                  MD5

                  ee87d669bdaf3fe239b86f4f76bab467

                  SHA1

                  a3d79efbb199aebb263db11a054ee1e5692be607

                  SHA256

                  f305a627115059bb9d66df01e558c00c6e2e5fff6e93c33299f069699dd893ac

                  SHA512

                  bcff0489ff29f14c69e63a490372069c3dfc740a1df7f9b2566f3d7a74e1f8be1a3722a51c481076362c9ca18aa094905a178d08a525269e769438853d407175

                • C:\Users\Admin\AppData\Local\Temp\AB72.exe
                  Filesize

                  24KB

                  MD5

                  ee87d669bdaf3fe239b86f4f76bab467

                  SHA1

                  a3d79efbb199aebb263db11a054ee1e5692be607

                  SHA256

                  f305a627115059bb9d66df01e558c00c6e2e5fff6e93c33299f069699dd893ac

                  SHA512

                  bcff0489ff29f14c69e63a490372069c3dfc740a1df7f9b2566f3d7a74e1f8be1a3722a51c481076362c9ca18aa094905a178d08a525269e769438853d407175

                • C:\Users\Admin\AppData\Local\Temp\AB72.exe
                  Filesize

                  24KB

                  MD5

                  ee87d669bdaf3fe239b86f4f76bab467

                  SHA1

                  a3d79efbb199aebb263db11a054ee1e5692be607

                  SHA256

                  f305a627115059bb9d66df01e558c00c6e2e5fff6e93c33299f069699dd893ac

                  SHA512

                  bcff0489ff29f14c69e63a490372069c3dfc740a1df7f9b2566f3d7a74e1f8be1a3722a51c481076362c9ca18aa094905a178d08a525269e769438853d407175

                • memory/772-162-0x0000000000000000-mapping.dmp
                • memory/1080-143-0x0000000000000000-mapping.dmp
                • memory/1272-178-0x0000000000000000-mapping.dmp
                • memory/1296-147-0x0000000000400000-0x0000000000409000-memory.dmp
                  Filesize

                  36KB

                • memory/1296-144-0x0000000000000000-mapping.dmp
                • memory/1296-145-0x0000000000400000-0x0000000000409000-memory.dmp
                  Filesize

                  36KB

                • memory/1296-146-0x0000000000400000-0x0000000000409000-memory.dmp
                  Filesize

                  36KB

                • memory/1524-142-0x0000000000000000-mapping.dmp
                • memory/1700-148-0x0000000000000000-mapping.dmp
                • memory/1700-151-0x00000000002B0000-0x00000000002BC000-memory.dmp
                  Filesize

                  48KB

                • memory/2108-171-0x0000000000000000-mapping.dmp
                • memory/2108-172-0x0000000000B80000-0x0000000000B86000-memory.dmp
                  Filesize

                  24KB

                • memory/2108-173-0x0000000000B70000-0x0000000000B7C000-memory.dmp
                  Filesize

                  48KB

                • memory/2108-177-0x0000000000B80000-0x0000000000B86000-memory.dmp
                  Filesize

                  24KB

                • memory/3140-175-0x0000000001000000-0x0000000001009000-memory.dmp
                  Filesize

                  36KB

                • memory/3140-161-0x0000000000000000-mapping.dmp
                • memory/3140-166-0x0000000000DF0000-0x0000000000DFF000-memory.dmp
                  Filesize

                  60KB

                • memory/3140-165-0x0000000001000000-0x0000000001009000-memory.dmp
                  Filesize

                  36KB

                • memory/3168-133-0x0000000006960000-0x0000000006982000-memory.dmp
                  Filesize

                  136KB

                • memory/3168-132-0x0000000000940000-0x000000000094C000-memory.dmp
                  Filesize

                  48KB

                • memory/3396-185-0x00000000061B0000-0x0000000006242000-memory.dmp
                  Filesize

                  584KB

                • memory/3396-186-0x00000000063B0000-0x00000000063BA000-memory.dmp
                  Filesize

                  40KB

                • memory/3396-187-0x0000000006410000-0x0000000006460000-memory.dmp
                  Filesize

                  320KB

                • memory/3396-188-0x0000000006700000-0x00000000068C2000-memory.dmp
                  Filesize

                  1.8MB

                • memory/3396-184-0x0000000004EA0000-0x0000000005444000-memory.dmp
                  Filesize

                  5.6MB

                • memory/3396-181-0x0000000000400000-0x0000000000430000-memory.dmp
                  Filesize

                  192KB

                • memory/3396-180-0x0000000000000000-mapping.dmp
                • memory/3472-156-0x0000000001220000-0x000000000122C000-memory.dmp
                  Filesize

                  48KB

                • memory/3472-155-0x0000000000000000-mapping.dmp
                • memory/3644-154-0x0000000000E00000-0x0000000000E6B000-memory.dmp
                  Filesize

                  428KB

                • memory/3644-153-0x0000000000E70000-0x0000000000EE5000-memory.dmp
                  Filesize

                  468KB

                • memory/3644-152-0x0000000000000000-mapping.dmp
                • memory/3644-157-0x0000000000E00000-0x0000000000E6B000-memory.dmp
                  Filesize

                  428KB

                • memory/4724-140-0x0000000008040000-0x00000000086BA000-memory.dmp
                  Filesize

                  6.5MB

                • memory/4724-139-0x00000000067D0000-0x00000000067EE000-memory.dmp
                  Filesize

                  120KB

                • memory/4724-138-0x00000000061C0000-0x0000000006226000-memory.dmp
                  Filesize

                  408KB

                • memory/4724-141-0x0000000006CD0000-0x0000000006CEA000-memory.dmp
                  Filesize

                  104KB

                • memory/4724-137-0x00000000060E0000-0x0000000006146000-memory.dmp
                  Filesize

                  408KB

                • memory/4724-136-0x0000000005880000-0x0000000005EA8000-memory.dmp
                  Filesize

                  6.2MB

                • memory/4724-135-0x0000000005210000-0x0000000005246000-memory.dmp
                  Filesize

                  216KB

                • memory/4724-134-0x0000000000000000-mapping.dmp
                • memory/4848-170-0x0000000000A40000-0x0000000000A49000-memory.dmp
                  Filesize

                  36KB

                • memory/4848-169-0x0000000000A50000-0x0000000000A55000-memory.dmp
                  Filesize

                  20KB

                • memory/4848-168-0x0000000000000000-mapping.dmp
                • memory/4848-176-0x0000000000A50000-0x0000000000A55000-memory.dmp
                  Filesize

                  20KB

                • memory/5012-174-0x0000000000A50000-0x0000000000A57000-memory.dmp
                  Filesize

                  28KB

                • memory/5012-160-0x0000000000A40000-0x0000000000A4B000-memory.dmp
                  Filesize

                  44KB

                • memory/5012-159-0x0000000000A50000-0x0000000000A57000-memory.dmp
                  Filesize

                  28KB

                • memory/5012-158-0x0000000000000000-mapping.dmp