Analysis

  • max time kernel
    40s
  • max time network
    103s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    18-11-2022 14:21

General

  • Target

    file.exe

  • Size

    274KB

  • MD5

    39e947318bd7c04280e9266f4b6c0a35

  • SHA1

    1568c064c8aa24f17549fbbff895fc7eae574dcd

  • SHA256

    ce3c6cc7e3d80c26246bb01b910992d8c77b1c3f30ec28b79346f15224a3c746

  • SHA512

    05361abdf59148b763bb5705587a01d8309a5db3b6a8006b70793459af8e48db8c801d41917af9d96e2b74f154a58822d24c4f7585a84f2c5ec43d2f39fb1db2

  • SSDEEP

    6144:/nEyS75sX+u7KlvKBPCJhKoRRfE87Ea6M:/Q2+umgEhdjfRM

Malware Config

Extracted

Family

vidar

Version

55.7

Botnet

1827

C2

https://t.me/deadftx

https://www.ultimate-guitar.com/u/smbfupkuhrgc1

Attributes
  • profile_id

    1827

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
  • 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:2000
    • 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:1724
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:1208

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

2
T1005

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/1208-81-0x0000000000000000-mapping.dmp
  • memory/1724-78-0x0000000000000000-mapping.dmp
  • memory/2000-54-0x0000000076391000-0x0000000076393000-memory.dmp
    Filesize

    8KB

  • memory/2000-55-0x000000000070B000-0x0000000000737000-memory.dmp
    Filesize

    176KB

  • memory/2000-56-0x0000000000220000-0x000000000026A000-memory.dmp
    Filesize

    296KB

  • memory/2000-57-0x0000000000400000-0x00000000005A9000-memory.dmp
    Filesize

    1.7MB

  • memory/2000-58-0x0000000061E00000-0x0000000061EF3000-memory.dmp
    Filesize

    972KB

  • memory/2000-80-0x0000000000400000-0x00000000005A9000-memory.dmp
    Filesize

    1.7MB

  • memory/2000-79-0x000000000070B000-0x0000000000737000-memory.dmp
    Filesize

    176KB