Analysis

  • max time kernel
    48s
  • max time network
    133s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    22-07-2021 09:04

General

  • Target

    b153a48172b1e3c4e93fdf40f704e4fa.exe

  • Size

    2.2MB

  • MD5

    b153a48172b1e3c4e93fdf40f704e4fa

  • SHA1

    ff01494d36906e30b4a53ff9862420a3922cf7a1

  • SHA256

    a66228e6a0b619a07070c311713d3630b53a89a3e7fdd4b871859e001e693329

  • SHA512

    c0720863a43d3b924ca91d2d1bdc7330a351a9ea70a890c2b25b67a2075a8d177c1c234ca8fc60bbbcb4abe7ad9743d02957f055746e94bff81a644bf73bef11

Malware Config

Extracted

Family

vidar

Version

39.7

Botnet

921

C2

https://shpak125.tumblr.com/

Attributes
  • profile_id

    921

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 3 IoCs
  • Downloads MZ/PE file
  • Deletes itself 1 IoCs
  • Loads dropped DLL 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses 2FA software files, possible credential harvesting 2 TTPs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

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

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe
    "C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2028
    • C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe
      C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe
      2⤵
        PID:1528
      • C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe
        C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe
        2⤵
          PID:1076
        • C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe
          C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe
          2⤵
          • Loads dropped DLL
          • Checks processor information in registry
          • Modifies system certificate store
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:748
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /c taskkill /im b153a48172b1e3c4e93fdf40f704e4fa.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\b153a48172b1e3c4e93fdf40f704e4fa.exe" & del C:\ProgramData\*.dll & exit
            3⤵
            • Deletes itself
            • Suspicious use of WriteProcessMemory
            PID:1176
            • C:\Windows\SysWOW64\taskkill.exe
              taskkill /im b153a48172b1e3c4e93fdf40f704e4fa.exe /f
              4⤵
              • Kills process with taskkill
              • Suspicious use of AdjustPrivilegeToken
              PID:912
            • C:\Windows\SysWOW64\timeout.exe
              timeout /t 6
              4⤵
              • Delays execution with timeout.exe
              PID:904

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Defense Evasion

      Install Root Certificate

      1
      T1130

      Modify Registry

      1
      T1112

      Credential Access

      Credentials in Files

      3
      T1081

      Discovery

      Query Registry

      2
      T1012

      System Information Discovery

      2
      T1082

      Collection

      Data from Local System

      3
      T1005

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\ProgramData\freebl3.dll
        MD5

        ef2834ac4ee7d6724f255beaf527e635

        SHA1

        5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

        SHA256

        a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

        SHA512

        c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

      • C:\ProgramData\mozglue.dll
        MD5

        8f73c08a9660691143661bf7332c3c27

        SHA1

        37fa65dd737c50fda710fdbde89e51374d0c204a

        SHA256

        3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

        SHA512

        0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

      • C:\ProgramData\msvcp140.dll
        MD5

        109f0f02fd37c84bfc7508d4227d7ed5

        SHA1

        ef7420141bb15ac334d3964082361a460bfdb975

        SHA256

        334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

        SHA512

        46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

      • C:\ProgramData\nss3.dll
        MD5

        bfac4e3c5908856ba17d41edcd455a51

        SHA1

        8eec7e888767aa9e4cca8ff246eb2aacb9170428

        SHA256

        e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

        SHA512

        2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

      • C:\ProgramData\softokn3.dll
        MD5

        a2ee53de9167bf0d6c019303b7ca84e5

        SHA1

        2a3c737fa1157e8483815e98b666408a18c0db42

        SHA256

        43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083

        SHA512

        45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

      • C:\ProgramData\vcruntime140.dll
        MD5

        7587bf9cb4147022cd5681b015183046

        SHA1

        f2106306a8f6f0da5afb7fc765cfa0757ad5a628

        SHA256

        c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

        SHA512

        0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

      • \ProgramData\mozglue.dll
        MD5

        8f73c08a9660691143661bf7332c3c27

        SHA1

        37fa65dd737c50fda710fdbde89e51374d0c204a

        SHA256

        3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

        SHA512

        0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

      • \ProgramData\msvcp140.dll
        MD5

        109f0f02fd37c84bfc7508d4227d7ed5

        SHA1

        ef7420141bb15ac334d3964082361a460bfdb975

        SHA256

        334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

        SHA512

        46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

      • \ProgramData\nss3.dll
        MD5

        bfac4e3c5908856ba17d41edcd455a51

        SHA1

        8eec7e888767aa9e4cca8ff246eb2aacb9170428

        SHA256

        e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

        SHA512

        2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

      • \ProgramData\vcruntime140.dll
        MD5

        7587bf9cb4147022cd5681b015183046

        SHA1

        f2106306a8f6f0da5afb7fc765cfa0757ad5a628

        SHA256

        c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

        SHA512

        0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

      • memory/748-65-0x00000000765F1000-0x00000000765F3000-memory.dmp
        Filesize

        8KB

      • memory/748-66-0x0000000000400000-0x00000000004A1000-memory.dmp
        Filesize

        644KB

      • memory/748-64-0x000000000046B76D-mapping.dmp
      • memory/748-63-0x0000000000400000-0x00000000004A1000-memory.dmp
        Filesize

        644KB

      • memory/904-73-0x0000000000000000-mapping.dmp
      • memory/912-72-0x0000000000000000-mapping.dmp
      • memory/1176-71-0x0000000000000000-mapping.dmp
      • memory/2028-60-0x00000000011F0000-0x00000000011F1000-memory.dmp
        Filesize

        4KB

      • memory/2028-62-0x0000000004C10000-0x0000000004C11000-memory.dmp
        Filesize

        4KB