Analysis

  • max time kernel
    23s
  • max time network
    24s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    17-01-2021 17:45

General

  • Target

    ff4715e729352eea84052907b951cf32.exe

  • Size

    4.2MB

  • MD5

    ff4715e729352eea84052907b951cf32

  • SHA1

    68440d3464d52b4aea96955b5c6725062e472329

  • SHA256

    30c29e58e71a8e3b2468d14dfdd1624b17af3f5c8ea560bfd1a278c3a513c5a9

  • SHA512

    3753c775dc22c168f1b036a9cf22befd957578c43d63b2eac9f23202aae5c8a20c39e925117c0836a430f60375b581e3154a35d5ae1147c16553712ed1e776e4

Malware Config

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Loads dropped DLL 4 IoCs
  • 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.

  • 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.

  • JavaScript code in executable 1 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 7 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • 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 3 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 46 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ff4715e729352eea84052907b951cf32.exe
    "C:\Users\Admin\AppData\Local\Temp\ff4715e729352eea84052907b951cf32.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:296
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1160
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:1724
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1292
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:1672
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1112
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:616
    • C:\Users\Admin\AppData\Local\Temp\ff4715e729352eea84052907b951cf32.exe
      "C:\Users\Admin\AppData\Local\Temp\ff4715e729352eea84052907b951cf32.exe"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:976
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c taskkill /im ff4715e729352eea84052907b951cf32.exe /f & erase C:\Users\Admin\AppData\Local\Temp\ff4715e729352eea84052907b951cf32.exe & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2044
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /im ff4715e729352eea84052907b951cf32.exe /f
          4⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:1788
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 296 -s 948
      2⤵
      • Program crash
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:524

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • \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/296-6-0x0000000000270000-0x0000000000271000-memory.dmp
    Filesize

    4KB

  • memory/296-5-0x0000000000AD0000-0x0000000000B67000-memory.dmp
    Filesize

    604KB

  • memory/296-3-0x00000000010D0000-0x00000000010D1000-memory.dmp
    Filesize

    4KB

  • memory/296-2-0x00000000748D0000-0x0000000074FBE000-memory.dmp
    Filesize

    6.9MB

  • memory/344-20-0x000007FEF6460000-0x000007FEF66DA000-memory.dmp
    Filesize

    2.5MB

  • memory/524-16-0x0000000000000000-mapping.dmp
  • memory/524-22-0x0000000001D80000-0x0000000001D81000-memory.dmp
    Filesize

    4KB

  • memory/524-17-0x0000000001DE0000-0x0000000001DF1000-memory.dmp
    Filesize

    68KB

  • memory/616-12-0x0000000000000000-mapping.dmp
  • memory/976-15-0x0000000076381000-0x0000000076383000-memory.dmp
    Filesize

    8KB

  • memory/976-13-0x0000000000400000-0x000000000048D000-memory.dmp
    Filesize

    564KB

  • memory/976-14-0x000000000045B4AD-mapping.dmp
  • memory/976-21-0x0000000000400000-0x000000000048D000-memory.dmp
    Filesize

    564KB

  • memory/1112-11-0x0000000000000000-mapping.dmp
  • memory/1160-7-0x0000000000000000-mapping.dmp
  • memory/1292-9-0x0000000000000000-mapping.dmp
  • memory/1672-10-0x0000000000000000-mapping.dmp
  • memory/1724-8-0x0000000000000000-mapping.dmp
  • memory/1788-28-0x0000000000000000-mapping.dmp
  • memory/2044-27-0x0000000000000000-mapping.dmp