Overview

overview

10

Static

static

7

05a68e1fdc...85.exe

windows7_x64

10

05a68e1fdc...85.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    152s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    08-07-2022 20:08

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General

  • Target

    05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe

  • Size

    2.6MB

  • MD5

    7a8a6b5e4e5c662860bbd3adb7e22622

  • SHA1

    234fd518fc22dfd428586a4ba58f85f69be7705d

  • SHA256

    05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85

  • SHA512

    f8ec8a900a253beb54bd9328a9ada484678a2bd6a6b3a380222fa88c30a4653d4f899958a801ee270c4bc949d9d6aaa7ee46515c28f91013ba99869586c2d9c6

Score
10/10
asyncratevasionratthemidatrojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.6A

C2

185.70.187.145:5555

Mutex

pehagymxwo

Attributes
  • delay

    5

  • install

    true

  • install_file

    gremor.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

    ratasyncrat
  • Async RAT payload 1 IoCs
    rat
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Themida packer 1 IoCs

    Detects Themida, an advanced Windows software protection system.

    themida
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    evasiontrojan
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistence
  • Suspicious behavior: EnumeratesProcesses 24 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe
    "C:\Users\Admin\AppData\Local\Temp\05a68e1fdcf49840097ac9879ff8bf190f7a8a7d7dc33d95d849df9af46a6f85.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2688
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /sc ONLOGON /RL HIGHEST /tn "'gremor"' /tr "'C:\Users\Admin\AppData\Roaming\gremor.exe"'
      2⤵
      • Creates scheduled task(s)
      PID:4104

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • memory/2688-130-0x00000000001E0000-0x0000000000480000-memory.dmp
    Filesize

    2.6MB

    Download
  • memory/2688-133-0x00000000772D0000-0x0000000077473000-memory.dmp
    Filesize

    1.6MB

    Download
  • memory/2688-134-0x00000000001E0000-0x0000000000480000-memory.dmp
    Filesize

    2.6MB

    Download
  • memory/2688-135-0x0000000005680000-0x000000000571C000-memory.dmp
    Filesize

    624KB

    Download
  • memory/2688-136-0x00000000001E0000-0x0000000000480000-memory.dmp
    Filesize

    2.6MB

    Download
  • memory/2688-137-0x00000000772D0000-0x0000000077473000-memory.dmp
    Filesize

    1.6MB

    Download
  • memory/2688-139-0x0000000005B00000-0x0000000005B66000-memory.dmp
    Filesize

    408KB

    Download
  • memory/4104-138-0x0000000000000000-mapping.dmp
    Download