Analysis

  • max time kernel
    119s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    04-07-2024 22:46

General

  • Target

    d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe

  • Size

    4.7MB

  • MD5

    6320d63025e1764e578680e24906def3

  • SHA1

    b452cb8f5fe2b5683b8ea94b90c5d3f415e53832

  • SHA256

    d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0

  • SHA512

    f75d2700fafea373de7f2c4131a650128d38146ef8fd7edef0c186ce3ebc1fb51b116f91596891d68f893a56b30e14035e565a55d0e5d228462c9e3e7a68dc51

  • SSDEEP

    98304:KjG9asZlqf3mTJBMAxu8l+yzWCdlPtclKfWN6D:KjGgsZlqvmT8wu8lZWCzo+

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

  • Detect Vidar Stealer 2 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 6 IoCs
  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe
    "C:\Users\Admin\AppData\Local\Temp\d4b22461e379bba07e2e2f6cf1833884c0ff656b84afdd3b2284be856f598ae0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2100
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2676
      • C:\ProgramData\ECFHJKEBAA.exe
        "C:\ProgramData\ECFHJKEBAA.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:2888
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2888 -s 96
          4⤵
          • Loads dropped DLL
          • Program crash
          PID:2084
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c timeout /t 10 & rd /s /q "C:\ProgramData\IDGDAAKFHIEH" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1144
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:1960

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\Local\Temp\Tar261E.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • \ProgramData\ECFHJKEBAA.exe

    Filesize

    937KB

    MD5

    168c5908924803d268d26965c32a5620

    SHA1

    9e0e2dc9c7e931c4ee860c32d83711c433f7b1a3

    SHA256

    2fd72d0d0fbc053a53adee5d9ec6cffde3fb5a3c6ba0c0490e24552b264d5449

    SHA512

    749f0e4da8d6fde35b53e769b0b594c2e63835f970eedc54c8c15889863811b5fb296650ae9f5e255bafdd4b942ad3434a60c48e05f1283820c378d30645f1c1

  • memory/2100-41-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-49-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-5-0x0000000000620000-0x000000000063C000-memory.dmp

    Filesize

    112KB

  • memory/2100-35-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-38-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-65-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-63-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-61-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-55-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-53-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-51-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-47-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-39-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-79-0x00000000741F0000-0x00000000748DE000-memory.dmp

    Filesize

    6.9MB

  • memory/2100-2-0x0000000000330000-0x000000000033A000-memory.dmp

    Filesize

    40KB

  • memory/2100-33-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-3-0x00000000741F0000-0x00000000748DE000-memory.dmp

    Filesize

    6.9MB

  • memory/2100-45-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-43-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-0-0x00000000741FE000-0x00000000741FF000-memory.dmp

    Filesize

    4KB

  • memory/2100-1-0x0000000000B90000-0x000000000104C000-memory.dmp

    Filesize

    4.7MB

  • memory/2100-4-0x0000000005760000-0x00000000058D4000-memory.dmp

    Filesize

    1.5MB

  • memory/2100-70-0x00000000741F0000-0x00000000748DE000-memory.dmp

    Filesize

    6.9MB

  • memory/2100-31-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-29-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-25-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-21-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-15-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-13-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-11-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-9-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-59-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-57-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-27-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-23-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-19-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-17-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-7-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2100-6-0x0000000000620000-0x0000000000635000-memory.dmp

    Filesize

    84KB

  • memory/2676-68-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/2676-78-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/2676-66-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/2676-603-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB