Analysis

  • max time kernel
    31s
  • max time network
    34s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    31-01-2023 15:37

General

  • Target

    file.exe

  • Size

    416KB

  • MD5

    996a9afca7ebed4ce1ac3f22f2f8da51

  • SHA1

    bebfc60a7b1fa8e493a458d15331907233f0e928

  • SHA256

    a594a97b66c29d9128d7757f71650c91575f1f32033f4cc56b49e8f5e1d4cecf

  • SHA512

    e50ab67d9d87f0dc801553116c2fb09320d8aa7f5041abcc79260c1de956de2c711d868b1561081beec32e0f23523226de0dff8e9df83fff11ec64006984d7f1

  • SSDEEP

    6144:rkgYDLQMDGDJyzP+Bpitd5QHiIuTWuej7bwtRaamqMoI/wr8Mu:9QcLDJwyWGCIuTPGbzqME

Malware Config

Extracted

Family

vidar

Version

2.3

Botnet

813

C2

https://t.me/mantarlars

https://steamcommunity.com/profiles/76561199474840123

Attributes
  • profile_id

    813

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Deletes itself 1 IoCs
  • 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
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1476
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\Temp\file.exe" & exit
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:936
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:1356

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
    Filesize

    133KB

    MD5

    8f73c08a9660691143661bf7332c3c27

    SHA1

    37fa65dd737c50fda710fdbde89e51374d0c204a

    SHA256

    3fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd

    SHA512

    0042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89

  • \ProgramData\nss3.dll
    Filesize

    1.2MB

    MD5

    bfac4e3c5908856ba17d41edcd455a51

    SHA1

    8eec7e888767aa9e4cca8ff246eb2aacb9170428

    SHA256

    e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78

    SHA512

    2565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66

  • memory/936-81-0x0000000000000000-mapping.dmp
  • memory/1356-84-0x0000000000000000-mapping.dmp
  • memory/1476-57-0x0000000075D01000-0x0000000075D03000-memory.dmp
    Filesize

    8KB

  • memory/1476-58-0x0000000050F50000-0x0000000050FE2000-memory.dmp
    Filesize

    584KB

  • memory/1476-55-0x0000000000220000-0x000000000027D000-memory.dmp
    Filesize

    372KB

  • memory/1476-56-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1476-79-0x000000000090B000-0x000000000093F000-memory.dmp
    Filesize

    208KB

  • memory/1476-80-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB

  • memory/1476-54-0x000000000090B000-0x000000000093F000-memory.dmp
    Filesize

    208KB

  • memory/1476-82-0x000000000090B000-0x000000000093F000-memory.dmp
    Filesize

    208KB

  • memory/1476-83-0x0000000000400000-0x0000000000482000-memory.dmp
    Filesize

    520KB