Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    19-07-2021 09:03

General

  • Target

    6382174601bf02a6f9b09303d4c7febf.exe

  • Size

    551KB

  • MD5

    6382174601bf02a6f9b09303d4c7febf

  • SHA1

    6af4c812ba7acc3e5a7237f4dfd7e013915aeda7

  • SHA256

    9706247fdb847874ca3fad6229787e37299be25d938af865a8e5b132bf313b89

  • SHA512

    62a24678c137367416613c34a4c7568a2323f264da5f59555a63d54b1b33ffbc94fd1d8c910c799383a91769809b72ebd0e0e61f617e1a784bcd4115d1098132

Malware Config

Extracted

Family

vidar

Version

39.6

Botnet

903

C2

https://sslamlssa1.tumblr.com/

Attributes
  • profile_id

    903

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Vidar Stealer 3 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 4 IoCs
  • Obfuscated with Agile.Net obfuscator 1 IoCs

    Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

  • 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 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6382174601bf02a6f9b09303d4c7febf.exe
    "C:\Users\Admin\AppData\Local\Temp\6382174601bf02a6f9b09303d4c7febf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Users\Admin\AppData\Local\Temp\6382174601bf02a6f9b09303d4c7febf.exe
      C:\Users\Admin\AppData\Local\Temp\6382174601bf02a6f9b09303d4c7febf.exe
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2028
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c taskkill /im 6382174601bf02a6f9b09303d4c7febf.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\6382174601bf02a6f9b09303d4c7febf.exe" & del C:\ProgramData\*.dll & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1444
        • C:\Windows\SysWOW64\taskkill.exe
          taskkill /im 6382174601bf02a6f9b09303d4c7febf.exe /f
          4⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:1608
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 6
          4⤵
          • Delays execution with timeout.exe
          PID:1132

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

  • \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/1132-73-0x0000000000000000-mapping.dmp
  • memory/1444-71-0x0000000000000000-mapping.dmp
  • memory/1608-72-0x0000000000000000-mapping.dmp
  • memory/1640-61-0x0000000000410000-0x0000000000411000-memory.dmp
    Filesize

    4KB

  • memory/1640-62-0x00000000002F0000-0x00000000002F8000-memory.dmp
    Filesize

    32KB

  • memory/1640-59-0x0000000000C40000-0x0000000000C41000-memory.dmp
    Filesize

    4KB

  • memory/2028-64-0x000000000046B76D-mapping.dmp
  • memory/2028-66-0x0000000000400000-0x00000000004A1000-memory.dmp
    Filesize

    644KB

  • memory/2028-65-0x00000000769B1000-0x00000000769B3000-memory.dmp
    Filesize

    8KB

  • memory/2028-63-0x0000000000400000-0x00000000004A1000-memory.dmp
    Filesize

    644KB