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Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/12/2024, 22:47

General

  • Target

    msdtc.exe

  • Size

    47KB

  • MD5

    2731a98129622a67a970a173dda353ef

  • SHA1

    4a705cfafbf7b1b543612203d09b16445a34887f

  • SHA256

    804fb0f9b639fb03310d7cb96b74172d7dca3edcb1fc94b8caaa7cdad6d81e49

  • SHA512

    0b471cac88b99408f9c653bf4feb0947e944c466b55931881790b64fcd6606b42e2960687208f0a7ea3d10b1df3c18cc51fdf8f6f197acdc4df1f293b28cf0fd

  • SSDEEP

    768:8uX9m9T3YkeaWUMneAmo2qhtrKerR2L17BPIpvRIAe/o0b74e09w8Q1/znXTBDZl:8uX9m9T3Pg2ApXpvRO/Db7G9JQjdw+

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

87.120.113.125:6606

87.120.113.125:7707

87.120.113.125:8808

Mutex

NnE2Recf2msF

Attributes
  • delay

    3

  • install

    true

  • install_file

    dwmm.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Asyncrat family
  • Async RAT payload 1 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).

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\msdtc.exe
    "C:\Users\Admin\AppData\Local\Temp\msdtc.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2980
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dwmm" /tr '"C:\Users\Admin\AppData\Roaming\dwmm.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4060
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "dwmm" /tr '"C:\Users\Admin\AppData\Roaming\dwmm.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3392
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9E24.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1524
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:3656
      • C:\Users\Admin\AppData\Roaming\dwmm.exe
        "C:\Users\Admin\AppData\Roaming\dwmm.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1288

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp9E24.tmp.bat

    Filesize

    148B

    MD5

    9ba17fe0e68297399c31a639bd7cd30f

    SHA1

    b58c2b9bcddd59506ef898b52609a761ffb9e1da

    SHA256

    974b768eceb8976dadc056b82d87c2f1287933a8d6fb179e092ff8dee1b6547b

    SHA512

    a47edd0ab606c30086b5dfff1293ac23a3b9ea53ae7a51c3df46d848b26b715ec23b3aa2c05d3832edea1d932699df33488920606e2659e047d6090b2e9ba6ab

  • C:\Users\Admin\AppData\Roaming\dwmm.exe

    Filesize

    47KB

    MD5

    2731a98129622a67a970a173dda353ef

    SHA1

    4a705cfafbf7b1b543612203d09b16445a34887f

    SHA256

    804fb0f9b639fb03310d7cb96b74172d7dca3edcb1fc94b8caaa7cdad6d81e49

    SHA512

    0b471cac88b99408f9c653bf4feb0947e944c466b55931881790b64fcd6606b42e2960687208f0a7ea3d10b1df3c18cc51fdf8f6f197acdc4df1f293b28cf0fd

  • memory/1288-14-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/1288-15-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2980-0-0x00000000745FE000-0x00000000745FF000-memory.dmp

    Filesize

    4KB

  • memory/2980-1-0x0000000000AE0000-0x0000000000AF2000-memory.dmp

    Filesize

    72KB

  • memory/2980-2-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2980-3-0x0000000005470000-0x00000000054D6000-memory.dmp

    Filesize

    408KB

  • memory/2980-4-0x0000000005920000-0x00000000059BC000-memory.dmp

    Filesize

    624KB

  • memory/2980-9-0x00000000745F0000-0x0000000074DA0000-memory.dmp

    Filesize

    7.7MB