Overview

overview

10

Static

static

10

flemme.exe

windows7-x64

10

flemme.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    49s
  • max time network
    3s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-08-2024 20:52

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General

  • Target

    flemme.exe

  • Size

    112KB

  • MD5

    2dd4a3e79a430fcf80e0c16c059c4c2c

  • SHA1

    b32b851bb2746acfa2035d6765f7827e5880debb

  • SHA256

    5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e

  • SHA512

    cae7ef83d8eb0f77d018dae6327b46cbb61e68623d64551492f883b9903a00ff410a9bda7c84f4348497e55b34490b315f855b95288e71710076cb246863a6a4

  • SSDEEP

    3072:IucJTUUk2QGjf93SybKeYOQpiGU0tFsHEx:IucjNrr9CybEOq5

Score
10/10
asyncratdefaultdiscoveryrat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707
Mutex

zou2AAxxuspP

Attributes
  • delay

    3

  • install

    true

  • install_file

    executorroblox.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Async RAT payload 1 IoCs
    rat
  • 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.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

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

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

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 52 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\flemme.exe
    "C:\Users\Admin\AppData\Local\Temp\flemme.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1544
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "executorroblox" /tr '"C:\Users\Admin\AppData\Roaming\executorroblox.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3732
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "executorroblox" /tr '"C:\Users\Admin\AppData\Roaming\executorroblox.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2956
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp60C8.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5076
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2148
      • C:\Users\Admin\AppData\Roaming\executorroblox.exe
        "C:\Users\Admin\AppData\Roaming\executorroblox.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1936
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1296,i,10369132178352108590,11047993562598554317,262144 --variations-seed-version --mojo-platform-channel-handle=4236 /prefetch:8
    1⤵
      PID:2800
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /4
      1⤵
      • Checks SCSI registry key(s)
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:948

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp60C8.tmp.bat
      Filesize

      158B

      MD5

      ad4487171a46a8c713b07815b8a8b2c6

      SHA1

      c091b8f35e77717e506226991251bec0776f09e9

      SHA256

      c2ddf405b9cb36576951f245d32e88e34e526e8345489e5b1c520b4392078e6d

      SHA512

      81dfe8b7bc5a7a921c1ba23d0fa3b03111c8e7b0556585606681e66bfce5eea844d3034cba138a5e613b5c2d8b83ab558ba67b0882371758e52103475bbfe835

      Download Submit

    • C:\Users\Admin\AppData\Roaming\executorroblox.exe
      Filesize

      112KB

      MD5

      2dd4a3e79a430fcf80e0c16c059c4c2c

      SHA1

      b32b851bb2746acfa2035d6765f7827e5880debb

      SHA256

      5969e616a32e7cb09dd32ddca0c37e989a6131edb5c4a7b4367400c3f0e8527e

      SHA512

      cae7ef83d8eb0f77d018dae6327b46cbb61e68623d64551492f883b9903a00ff410a9bda7c84f4348497e55b34490b315f855b95288e71710076cb246863a6a4

      Download Submit

    • memory/948-26-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-22-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-20-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-21-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-24-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-25-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-16-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-15-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-14-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/948-23-0x000001FC89CE0000-0x000001FC89CE1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1544-0-0x00000000749DE000-0x00000000749DF000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1544-1-0x0000000000EA0000-0x0000000000EC2000-memory.dmp

      Filesize

      136KB

      Download

    • memory/1544-3-0x0000000005870000-0x000000000590C000-memory.dmp

      Filesize

      624KB

      Download

    • memory/1544-2-0x00000000749D0000-0x0000000075180000-memory.dmp

      Filesize

      7.7MB

      Download

    • memory/1544-8-0x00000000749D0000-0x0000000075180000-memory.dmp

      Filesize

      7.7MB

      Download

    • memory/1936-13-0x0000000074920000-0x00000000750D0000-memory.dmp

      Filesize

      7.7MB

      Download

    • memory/1936-27-0x0000000074920000-0x00000000750D0000-memory.dmp

      Filesize

      7.7MB

      Download