Analysis

  • max time kernel
    144s
  • max time network
    168s
  • platform
    windows7_x64
  • resource
    win7-20220718-en
  • submitted
    31-07-2022 05:31

General

  • Target

    79a6c5f072caaf06cd2c231a921b7182867c1574f0f7ca42aa48eddc7e67d5da.exe

  • Size

    1MB

  • MD5

    f415e0651f77e4675adce4e5eab6e3ba

  • SHA1

    ce5753e7194dd65ffa300717b51494bbb4ccc06e

  • SHA256

    79a6c5f072caaf06cd2c231a921b7182867c1574f0f7ca42aa48eddc7e67d5da

  • SHA512

    37c243fcf954510c51bb42baf47ba80cf7e505a14c62534d47ce136cbba9ff55198bf7391c2c5c7008fca2810ea95327703c38e67d13ba3ae67020efe2a1e348

  • SSDEEP

    49152:/9YrbVbva8icXiXztEBHthz4f8SmrMCbFYymcCjm:FY3BvaXVBE1th06q

Malware Config

Extracted

Family

cryptbot

C2

myy01.top

Signatures

  • CryptBot

    A C++ stealer distributed widely in bundle with other software.

  • 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.

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Reads user/profile data of web browsers 2 TTPs

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

  • 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.

  • Looks up external IP address via web service 1 IoCs

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

  • 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.

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of FindShellTrayWindow 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\79a6c5f072caaf06cd2c231a921b7182867c1574f0f7ca42aa48eddc7e67d5da.exe
    "C:\Users\Admin\AppData\Local\Temp\79a6c5f072caaf06cd2c231a921b7182867c1574f0f7ca42aa48eddc7e67d5da.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    PID:1744

Network

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Collection

Data from Local System

2
T1005

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1744-54-0x0000000075141000-0x0000000075143000-memory.dmp
    Filesize

    8KB

  • memory/1744-55-0x00000000011F0000-0x00000000015B0000-memory.dmp
    Filesize

    3MB

  • memory/1744-56-0x0000000076F20000-0x00000000770A0000-memory.dmp
    Filesize

    1MB

  • memory/1744-57-0x0000000074071000-0x0000000074073000-memory.dmp
    Filesize

    8KB

  • memory/1744-58-0x00000000011F0000-0x00000000015B0000-memory.dmp
    Filesize

    3MB

  • memory/1744-59-0x0000000073D71000-0x0000000073D73000-memory.dmp
    Filesize

    8KB

  • memory/1744-66-0x00000000011F0000-0x00000000015B0000-memory.dmp
    Filesize

    3MB

  • memory/1744-67-0x00000000011F0000-0x00000000015B0000-memory.dmp
    Filesize

    3MB

  • memory/1744-68-0x0000000073BE1000-0x0000000073BE3000-memory.dmp
    Filesize

    8KB