Resubmissions

24-02-2023 03:21

230224-dwn74sca6w 10

07-02-2023 19:50

230207-yj9cqsef9t 10

Analysis

  • max time kernel
    31s
  • max time network
    33s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    07-02-2023 19:50

General

  • Target

    file.exe

  • Size

    6.3MB

  • MD5

    9c09eeffe2f425af3658e7596efa753e

  • SHA1

    bfd360c1be479ec1495bfb3b9fee0a5de2577d55

  • SHA256

    827c4997002fad614d23a5c16f9547005862ce2a8d5758e986f7a9ad67266184

  • SHA512

    0ab73e8c6256d10b9d17104152f9d93ccf67ee17db14be7f220fb24c87ae30282179a55543c96c1060ac098dabf36462e0ab931d5a238ff1fab1b979dc04f3f6

  • SSDEEP

    196608:g++s55CXIftXiqzb2oRBIKM2cZlZAAsU5H6qMENA2:lHJz6aIycKRCHecZ

Malware Config

Signatures

  • PrivateLoader

    PrivateLoader is a downloader sold as a pay-per-install malware distribution service.

  • 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.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • 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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 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.

  • Modifies system certificate store 2 TTPs 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 4 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
    • 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:1292
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1292 -s 1104
      2⤵
      • Program crash
      PID:1824

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

1
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

3
T1082

Collection

Data from Local System

1
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1292-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp
    Filesize

    8KB

  • memory/1292-55-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1292-56-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1292-57-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1292-58-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1292-59-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1292-60-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1292-61-0x0000000077280000-0x0000000077400000-memory.dmp
    Filesize

    1.5MB

  • memory/1292-62-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1292-63-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1292-65-0x0000000000400000-0x0000000000FF3000-memory.dmp
    Filesize

    11.9MB

  • memory/1824-64-0x0000000000000000-mapping.dmp