Analysis

  • max time kernel
    152s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-02-2023 17:06

General

  • Target

    e16de135773985fd9ef2e0afb94f774a.exe

  • Size

    45KB

  • MD5

    e16de135773985fd9ef2e0afb94f774a

  • SHA1

    84c2dd69ec6247cea480925d9ecfc728f5d04c58

  • SHA256

    af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630

  • SHA512

    0573dbceabcef8f74d6a32d45645ad297b6f28e7f26043ce0c1a68bd24cb8a67b75158050e2ee4b1dcdd37b660da26ecc135dd3deb630dee9c10a3863e817c34

  • SSDEEP

    768:DuwQNToEjaNLWU3zKZmo2q723YZJugbbb409ybdPIK/JjbOgX3iWS9UmozmBDZfx:DuwQNToqaS2DYosymK/pbxXSzdfx

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

sr5gsedfgwsers.freemyip.com:15420

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    tmpC723.tmp.exe

  • install_folder

    %Temp%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

  • Async RAT payload 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 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.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e16de135773985fd9ef2e0afb94f774a.exe
    "C:\Users\Admin\AppData\Local\Temp\e16de135773985fd9ef2e0afb94f774a.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4224
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "tmpC723.tmp" /tr '"C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4444
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "tmpC723.tmp" /tr '"C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4720
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9252.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4792
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4688
      • C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe
        "C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4584

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp9252.tmp.bat
    Filesize

    158B

    MD5

    4d68e413fc3a46c66f5885c5748dc684

    SHA1

    efee4214c82096395857e2e6d8bc760590e81d0b

    SHA256

    570d14befc0055ac29f8aea374612462d202e927069e1f95557639d32eb37198

    SHA512

    e7a7804eb9c0abcfb2edb20e021f0ae90e7538a483a7f44f0dba428edecd2d1ae7f56a4db2ad30528c13c99988e4214a413885700590bc807273f411d6a34d5f

  • C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe
    Filesize

    45KB

    MD5

    e16de135773985fd9ef2e0afb94f774a

    SHA1

    84c2dd69ec6247cea480925d9ecfc728f5d04c58

    SHA256

    af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630

    SHA512

    0573dbceabcef8f74d6a32d45645ad297b6f28e7f26043ce0c1a68bd24cb8a67b75158050e2ee4b1dcdd37b660da26ecc135dd3deb630dee9c10a3863e817c34

  • C:\Users\Admin\AppData\Local\Temp\tmpC723.tmp.exe
    Filesize

    45KB

    MD5

    e16de135773985fd9ef2e0afb94f774a

    SHA1

    84c2dd69ec6247cea480925d9ecfc728f5d04c58

    SHA256

    af32b03c1fdbc8a4dd60fdea328134b6a34946c7c77cd743600a2101a70c6630

    SHA512

    0573dbceabcef8f74d6a32d45645ad297b6f28e7f26043ce0c1a68bd24cb8a67b75158050e2ee4b1dcdd37b660da26ecc135dd3deb630dee9c10a3863e817c34

  • memory/4224-132-0x00000000007E0000-0x00000000007F2000-memory.dmp
    Filesize

    72KB

  • memory/4224-133-0x0000000005280000-0x00000000052E6000-memory.dmp
    Filesize

    408KB

  • memory/4224-134-0x00000000056D0000-0x000000000576C000-memory.dmp
    Filesize

    624KB

  • memory/4444-135-0x0000000000000000-mapping.dmp
  • memory/4584-140-0x0000000000000000-mapping.dmp
  • memory/4584-143-0x0000000006410000-0x00000000069B4000-memory.dmp
    Filesize

    5.6MB

  • memory/4688-139-0x0000000000000000-mapping.dmp
  • memory/4720-137-0x0000000000000000-mapping.dmp
  • memory/4792-136-0x0000000000000000-mapping.dmp