Analysis

  • max time kernel
    101s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    23-05-2024 11:06

General

  • Target

    a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe

  • Size

    63KB

  • MD5

    b8d455465260a845db35492fda5a8888

  • SHA1

    287b0ba049ad8f3be802d2224efb86dba72d3221

  • SHA256

    a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282

  • SHA512

    5dba43ae31420de362593752e8ff491afbe8d20f183f6b95e6962ea1e637c7bf3bd50b5213e4d928a96b85d9b54841ee697798b0089624b13ef7eded826cd86a

  • SSDEEP

    768:CuY6LVcsTPq781wC8A+XjuazcBRL5JTk1+T4KSBGHmDbD/ph0oX9rAW6dEYSuEdP:reQPckdSJYUbdh9O8uEdpqKmY7

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

66.235.168.242:3232

Attributes
  • delay

    1

  • install

    true

  • install_file

    Loaader.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • Stealerium

    An open source info stealer written in C# first seen in May 2022.

  • UAC bypass 3 TTPs 3 IoCs
  • Async RAT payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Windows security modification 2 TTPs 1 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Looks up external IP address via web service 2 IoCs

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

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs
  • System policy modification 1 TTPs 3 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe
    "C:\Users\Admin\AppData\Local\Temp\a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2400
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Loaader" /tr '"C:\Users\Admin\AppData\Roaming\Loaader.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2152
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Loaader" /tr '"C:\Users\Admin\AppData\Roaming\Loaader.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2888
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8AFA.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2312
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3032
      • C:\Users\Admin\AppData\Roaming\Loaader.exe
        "C:\Users\Admin\AppData\Roaming\Loaader.exe"
        3⤵
        • Modifies Windows Defender Real-time Protection settings
        • UAC bypass
        • Executes dropped EXE
        • Windows security modification
        • Accesses Microsoft Outlook profiles
        • Checks whether UAC is enabled
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        • outlook_office_path
        • outlook_win_path
        PID:3924
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Get-MpPreference -verbose
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3636
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add - MpPreference - ExclusionExtension ".exe"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4792
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:2136
          • C:\Windows\system32\chcp.com
            chcp 65001
            5⤵
              PID:3116
            • C:\Windows\system32\netsh.exe
              netsh wlan show profile
              5⤵
                PID:896
              • C:\Windows\system32\findstr.exe
                findstr All
                5⤵
                  PID:344
              • C:\Windows\SYSTEM32\cmd.exe
                "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
                4⤵
                • Suspicious use of WriteProcessMemory
                PID:1556
                • C:\Windows\system32\chcp.com
                  chcp 65001
                  5⤵
                    PID:4204
                  • C:\Windows\system32\netsh.exe
                    netsh wlan show networks mode=bssid
                    5⤵
                      PID:3052

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\1c629bcf45b09b5e024d3c5ce4c67cbf\Admin@OYHKEPSP_en-US\Browsers\Mozilla\Firefox\Bookmarks.txt

              Filesize

              105B

              MD5

              2e9d094dda5cdc3ce6519f75943a4ff4

              SHA1

              5d989b4ac8b699781681fe75ed9ef98191a5096c

              SHA256

              c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

              SHA512

              d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

            • C:\Users\Admin\AppData\Local\1c629bcf45b09b5e024d3c5ce4c67cbf\Admin@OYHKEPSP_en-US\System\Process.txt

              Filesize

              745B

              MD5

              8be47432f9a5954d7490f6480f863f64

              SHA1

              0f72a817fa5413624fe4325657368811e6a79eea

              SHA256

              685bdd2ce75d725c13a0319bc54fca46ecdaa2261e7d60f116341cfeea74ca2c

              SHA512

              288a560dd75fa5a89f8226f28e8bbc05aff4c8d31692eefbea457bb4e95667e3c9e254eaeeb56751444db8ab4ef654bd89632cb7937548cf7f78b1dc81f1db3c

            • C:\Users\Admin\AppData\Local\1c629bcf45b09b5e024d3c5ce4c67cbf\Admin@OYHKEPSP_en-US\System\Process.txt

              Filesize

              1KB

              MD5

              7190bb750d7950c6df9bded7bf72d9a3

              SHA1

              39a218eede3870b9762bba93767f931b3daeff1e

              SHA256

              0df1a3d694b5c6659d17f4ae017b9403834d4d67340235f911c32164b12c8057

              SHA512

              431527adfa20002a029fc958131363836889b8b8565ba2176c8aa775a6e6ed4434c67024491b7d2cd544bda0eb5f33553121f6c5a34c3b763b94c15006410915

            • C:\Users\Admin\AppData\Local\1c629bcf45b09b5e024d3c5ce4c67cbf\Admin@OYHKEPSP_en-US\System\Process.txt

              Filesize

              2KB

              MD5

              a5a645b1b8dc5d0a5f6ed8ff0c17dac7

              SHA1

              06c6a470dbe411b1f17644ab7d5694ddb5f869d3

              SHA256

              f1df5e1785d1109b8f7ef0a6cacbbd1b614b262a9b8dcb5231c64237131ce719

              SHA512

              198cfb771c5bddae843860cd4f3189a27add274282d74229f9fa903edaffae853431731347c118638b3984546422599573f967630e85acecffd4243ae750d680

            • C:\Users\Admin\AppData\Local\1c629bcf45b09b5e024d3c5ce4c67cbf\Admin@OYHKEPSP_en-US\System\Process.txt

              Filesize

              4KB

              MD5

              8815596f17a50efe63c58850b0d294b2

              SHA1

              1f1f46c924e71433adc158becb9011082db2658d

              SHA256

              2a133d1f1b1d807d26f48bf7e20d160ed7ef5e5664ed3e000b10fe06d1ff19fe

              SHA512

              d3f14266a71e28332ac0d5f38586ee42cd340dac5565a3417a0fe920192a0bf7548c7b9bc339d06a6c493310ae244c4648f978727de3859b190462d1d703c117

            • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

              Filesize

              2KB

              MD5

              627073ee3ca9676911bee35548eff2b8

              SHA1

              4c4b68c65e2cab9864b51167d710aa29ebdcff2e

              SHA256

              85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

              SHA512

              3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

            • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

              Filesize

              944B

              MD5

              1a9fa92a4f2e2ec9e244d43a6a4f8fb9

              SHA1

              9910190edfaccece1dfcc1d92e357772f5dae8f7

              SHA256

              0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

              SHA512

              5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ti2cxglc.yiv.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • C:\Users\Admin\AppData\Local\Temp\tmp8AFA.tmp.bat

              Filesize

              151B

              MD5

              c9c7a46789559d79a087181381a63139

              SHA1

              2ecad246c77b9da3e0752e2a58d077fb54d1cead

              SHA256

              6a842e2d1aeb09a9213860cb30acad653c3a83c236adac55a11ac986f0a3f23d

              SHA512

              ca4e87e8bf8f2f1a65607e2aa365a63bae4fad424e137200376997c917c27be2aa59da9dfa055ebbbad32913a805267b55783f70b60b404b3e5f0e7547e44bfa

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

              Filesize

              63KB

              MD5

              b8d455465260a845db35492fda5a8888

              SHA1

              287b0ba049ad8f3be802d2224efb86dba72d3221

              SHA256

              a150a433c6a3e4278f6cc4cbc85863fc431e5c1e65081ad67253513e8ca01282

              SHA512

              5dba43ae31420de362593752e8ff491afbe8d20f183f6b95e6962ea1e637c7bf3bd50b5213e4d928a96b85d9b54841ee697798b0089624b13ef7eded826cd86a

            • memory/2400-0-0x0000000000C10000-0x0000000000C26000-memory.dmp

              Filesize

              88KB

            • memory/2400-1-0x00007FFE097B3000-0x00007FFE097B5000-memory.dmp

              Filesize

              8KB

            • memory/2400-2-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

              Filesize

              10.8MB

            • memory/2400-3-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

              Filesize

              10.8MB

            • memory/2400-8-0x00007FFE097B0000-0x00007FFE0A272000-memory.dmp

              Filesize

              10.8MB

            • memory/3636-27-0x000002B3EDDA0000-0x000002B3EDDC2000-memory.dmp

              Filesize

              136KB

            • memory/3924-16-0x0000000002370000-0x00000000023A4000-memory.dmp

              Filesize

              208KB

            • memory/3924-48-0x000000001D710000-0x000000001D71A000-memory.dmp

              Filesize

              40KB

            • memory/3924-43-0x000000001DBF0000-0x000000001DD78000-memory.dmp

              Filesize

              1.5MB

            • memory/3924-41-0x000000001D4D0000-0x000000001D582000-memory.dmp

              Filesize

              712KB

            • memory/3924-15-0x000000001CF50000-0x000000001CFC6000-memory.dmp

              Filesize

              472KB

            • memory/3924-18-0x00000000023A0000-0x00000000023D4000-memory.dmp

              Filesize

              208KB

            • memory/3924-17-0x000000001CED0000-0x000000001CEEE000-memory.dmp

              Filesize

              120KB

            • memory/3924-191-0x00000000008E0000-0x000000000095A000-memory.dmp

              Filesize

              488KB