Analysis

  • max time kernel
    151s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    23-03-2023 15:57

General

  • Target

    file.exe

  • Size

    5.4MB

  • MD5

    0590b2409eb38418e064b552945b3f91

  • SHA1

    ddf8f28eb904f387dd9430082fc8abac98c61efa

  • SHA256

    2453f0f1232d73d823f5bd2dadf48fb18cff82604d1613d1707ae6fb451743e4

  • SHA512

    d59559505434143924e56f4e3e82a1f42eea0fc7a8ffa226d9fc2e6c292e8f2879260326c8e2ac474eb1cf310c52877ae9ce0124b8245eb998d2dbcf2db698c2

  • SSDEEP

    98304:bWFfqP11weDNI1HxzWga8eINvg/Tig3cxq1p0rj/KWCdo0qZIEBdBH1:CBqHweDNI1HxioZarigswpCC+TP

Malware Config

Extracted

Family

vidar

Version

3.1

Botnet

20f95c4f85151b21c48a8766fbd2d32d

C2

https://steamcommunity.com/profiles/76561199472266392

https://t.me/tabootalks

http://135.181.26.183:80

Attributes
  • profile_id_v2

    20f95c4f85151b21c48a8766fbd2d32d

  • user_agent

    Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36 OPR/91.0.4516.79

Signatures

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • 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.

  • Themida packer 18 IoCs

    Detects Themida, an advanced Windows software protection system.

  • VMProtect packed file 18 IoCs

    Detects executables packed with VMProtect commercial packer.

  • 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.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 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
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 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⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Loads dropped DLL
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1712
    • 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:392
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 6
        3⤵
        • Delays execution with timeout.exe
        PID:932

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Collection

Data from Local System

3
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

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

    61KB

    MD5

    e71c8443ae0bc2e282c73faead0a6dd3

    SHA1

    0c110c1b01e68edfacaeae64781a37b1995fa94b

    SHA256

    95b0a5acc5bf70d3abdfd091d0c9f9063aa4fde65bd34dbf16786082e1992e72

    SHA512

    b38458c7fa2825afb72794f374827403d5946b1132e136a0ce075dfd351277cf7d957c88dc8a1e4adc3bcae1fa8010dae3831e268e910d517691de24326391a6

  • C:\Users\Admin\AppData\Local\Temp\TarB727.tmp
    Filesize

    161KB

    MD5

    be2bec6e8c5653136d3e72fe53c98aa3

    SHA1

    a8182d6db17c14671c3d5766c72e58d87c0810de

    SHA256

    1919aab2a820642490169bdc4e88bd1189e22f83e7498bf8ebdfb62ec7d843fd

    SHA512

    0d1424ccdf0d53faf3f4e13d534e12f22388648aa4c23edbc503801e3c96b7f73c7999b760b5bef4b5e9dd923dffe21a21889b1ce836dd428420bf0f4f5327ff

  • \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/1712-81-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-84-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-60-0x0000000000110000-0x0000000000111000-memory.dmp
    Filesize

    4KB

  • memory/1712-62-0x0000000000120000-0x0000000000121000-memory.dmp
    Filesize

    4KB

  • memory/1712-72-0x0000000000190000-0x0000000000191000-memory.dmp
    Filesize

    4KB

  • memory/1712-71-0x0000000000190000-0x0000000000191000-memory.dmp
    Filesize

    4KB

  • memory/1712-69-0x0000000000180000-0x0000000000181000-memory.dmp
    Filesize

    4KB

  • memory/1712-68-0x0000000000180000-0x0000000000181000-memory.dmp
    Filesize

    4KB

  • memory/1712-66-0x0000000000130000-0x0000000000131000-memory.dmp
    Filesize

    4KB

  • memory/1712-65-0x0000000000130000-0x0000000000131000-memory.dmp
    Filesize

    4KB

  • memory/1712-63-0x0000000000120000-0x0000000000121000-memory.dmp
    Filesize

    4KB

  • memory/1712-73-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-78-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-79-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-54-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-80-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-82-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-58-0x0000000000110000-0x0000000000111000-memory.dmp
    Filesize

    4KB

  • memory/1712-85-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-88-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-89-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-59-0x0000000000110000-0x0000000000111000-memory.dmp
    Filesize

    4KB

  • memory/1712-57-0x0000000000100000-0x0000000000101000-memory.dmp
    Filesize

    4KB

  • memory/1712-141-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-142-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-143-0x0000000061E00000-0x0000000061EF3000-memory.dmp
    Filesize

    972KB

  • memory/1712-55-0x0000000000100000-0x0000000000101000-memory.dmp
    Filesize

    4KB

  • memory/1712-56-0x0000000000100000-0x0000000000101000-memory.dmp
    Filesize

    4KB

  • memory/1712-196-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-197-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-198-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-199-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB

  • memory/1712-200-0x0000000000F90000-0x0000000001A70000-memory.dmp
    Filesize

    10.9MB