Resubmissions

22-04-2022 11:52

220422-n1tcqscad7 10

19-04-2022 14:05

220419-rdt8asfbg5 7

Analysis

  • max time kernel
    81s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    22-04-2022 11:52

General

  • Target

    bc4d1e8e09905b7dd1d4b14ae7ba3b100e1baa7aeb567e225107d4439da03403.exe

  • Size

    635KB

  • MD5

    ebfb5ded5dc595e22ee02b08597b93eb

  • SHA1

    8c33736b8b3dc750027ef49b1059d5d3a231182a

  • SHA256

    bc4d1e8e09905b7dd1d4b14ae7ba3b100e1baa7aeb567e225107d4439da03403

  • SHA512

    e74d3f71ece40008cdcb7bcdfc6547ca406e4fb3fd3048177648d0ae906ad11223412963ee6b2b3ebe70a14006bc4ddb9d387b129a4f27fd34c4e8a9f5afdead

Malware Config

Extracted

Family

vidar

Version

51.7

Botnet

977

C2

https://t.me/hi20220412

https://noc.social/@samal6

Attributes
  • profile_id

    977

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 2 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.

  • 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
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bc4d1e8e09905b7dd1d4b14ae7ba3b100e1baa7aeb567e225107d4439da03403.exe
    "C:\Users\Admin\AppData\Local\Temp\bc4d1e8e09905b7dd1d4b14ae7ba3b100e1baa7aeb567e225107d4439da03403.exe"
    1⤵
    • Checks computer location settings
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4088
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im bc4d1e8e09905b7dd1d4b14ae7ba3b100e1baa7aeb567e225107d4439da03403.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\bc4d1e8e09905b7dd1d4b14ae7ba3b100e1baa7aeb567e225107d4439da03403.exe" & del C:\ProgramData\*.dll & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3876
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im bc4d1e8e09905b7dd1d4b14ae7ba3b100e1baa7aeb567e225107d4439da03403.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3220
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:3880
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k appmodel -p -s camsvc
    1⤵
      PID:4300

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\freebl3.dll

      Filesize

      326KB

      MD5

      ef2834ac4ee7d6724f255beaf527e635

      SHA1

      5be8c1e73a21b49f353c2ecfa4108e43a883cb7b

      SHA256

      a770ecba3b08bbabd0a567fc978e50615f8b346709f8eb3cfacf3faab24090ba

      SHA512

      c6ea0e4347cbd7ef5e80ae8c0afdca20ea23ac2bdd963361dfaf562a9aed58dcbc43f89dd826692a064d76c3f4b3e92361af7b79a6d16a75d9951591ae3544d2

    • C:\ProgramData\mozglue.dll

      Filesize

      133KB

      MD5

      8f73c08a9660691143661bf7332c3c27

      SHA1

      37fa65dd737c50fda710fdbde89e51374d0c204a

      SHA256

      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

      SHA512

      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

    • C:\ProgramData\mozglue.dll

      Filesize

      133KB

      MD5

      8f73c08a9660691143661bf7332c3c27

      SHA1

      37fa65dd737c50fda710fdbde89e51374d0c204a

      SHA256

      3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

      SHA512

      0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

    • C:\ProgramData\msvcp140.dll

      Filesize

      429KB

      MD5

      109f0f02fd37c84bfc7508d4227d7ed5

      SHA1

      ef7420141bb15ac334d3964082361a460bfdb975

      SHA256

      334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4

      SHA512

      46eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39

    • C:\ProgramData\nss3.dll

      Filesize

      1.2MB

      MD5

      bfac4e3c5908856ba17d41edcd455a51

      SHA1

      8eec7e888767aa9e4cca8ff246eb2aacb9170428

      SHA256

      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

      SHA512

      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

    • C:\ProgramData\nss3.dll

      Filesize

      1.2MB

      MD5

      bfac4e3c5908856ba17d41edcd455a51

      SHA1

      8eec7e888767aa9e4cca8ff246eb2aacb9170428

      SHA256

      e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

      SHA512

      2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

    • C:\ProgramData\softokn3.dll

      Filesize

      141KB

      MD5

      a2ee53de9167bf0d6c019303b7ca84e5

      SHA1

      2a3c737fa1157e8483815e98b666408a18c0db42

      SHA256

      43536adef2ddcc811c28d35fa6ce3031029a2424ad393989db36169ff2995083

      SHA512

      45b56432244f86321fa88fbcca6a0d2a2f7f4e0648c1d7d7b1866adc9daa5eddd9f6bb73662149f279c9ab60930dad1113c8337cb5e6ec9eed5048322f65f7d8

    • C:\ProgramData\vcruntime140.dll

      Filesize

      81KB

      MD5

      7587bf9cb4147022cd5681b015183046

      SHA1

      f2106306a8f6f0da5afb7fc765cfa0757ad5a628

      SHA256

      c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d

      SHA512

      0b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f

    • memory/3220-136-0x0000000000000000-mapping.dmp

    • memory/3876-135-0x0000000000000000-mapping.dmp

    • memory/3880-137-0x0000000000000000-mapping.dmp

    • memory/4088-130-0x00000000004F2000-0x000000000055F000-memory.dmp

      Filesize

      436KB

    • memory/4088-132-0x0000000000400000-0x00000000004C7000-memory.dmp

      Filesize

      796KB

    • memory/4088-131-0x0000000002140000-0x00000000021EF000-memory.dmp

      Filesize

      700KB