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Analysis

  • max time kernel
    132s
  • max time network
    133s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    04/10/2022, 10:16

General

  • Target

    477137a70495c522243bdf0a037b081d.exe

  • Size

    374KB

  • MD5

    477137a70495c522243bdf0a037b081d

  • SHA1

    82a99775a45a9a76a803cab4139cfa9a6d8147fe

  • SHA256

    b20fa8f21254b18ddb0fc16c0775069559bba65a38f38e46f7b4d16914096590

  • SHA512

    70681229aae961e846e78644d66d41254199cfc9fb426459993427653c8690e219d88cf3580acff0e1b8aea67688558c20d42d843a8f29130ecc71315e89aed9

  • SSDEEP

    6144:F4hLsxzZnxM79kPVwwysGXZXskjr23FrbfayPuzbgwul6swVfU:FIwxzTMidwBrEla2unndk

Malware Config

Extracted

Family

vidar

Version

54.9

Botnet

517

C2

https://t.me/larsenup

https://ioc.exchange/@zebra54

Attributes
  • profile_id

    517

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • 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.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\477137a70495c522243bdf0a037b081d.exe
    "C:\Users\Admin\AppData\Local\Temp\477137a70495c522243bdf0a037b081d.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:784
    • C:\Users\Admin\AppData\Local\Temp\477137a70495c522243bdf0a037b081d.exe
      "C:\Users\Admin\AppData\Local\Temp\477137a70495c522243bdf0a037b081d.exe"
      2⤵
      • Loads dropped DLL
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:2032

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • \ProgramData\mozglue.dll

    Filesize

    593KB

    MD5

    c8fd9be83bc728cc04beffafc2907fe9

    SHA1

    95ab9f701e0024cedfbd312bcfe4e726744c4f2e

    SHA256

    ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a

    SHA512

    fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040

  • \ProgramData\nss3.dll

    Filesize

    2.0MB

    MD5

    1cc453cdf74f31e4d913ff9c10acdde2

    SHA1

    6e85eae544d6e965f15fa5c39700fa7202f3aafe

    SHA256

    ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5

    SHA512

    dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571

  • memory/784-56-0x00000000004FC000-0x0000000000528000-memory.dmp

    Filesize

    176KB

  • memory/784-58-0x00000000002A0000-0x00000000002EA000-memory.dmp

    Filesize

    296KB

  • memory/2032-54-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/2032-59-0x0000000075FC1000-0x0000000075FC3000-memory.dmp

    Filesize

    8KB

  • memory/2032-60-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/2032-61-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/2032-62-0x0000000061E00000-0x0000000061EF3000-memory.dmp

    Filesize

    972KB

  • memory/2032-82-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/2032-83-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB