Analysis

  • max time kernel
    57s
  • max time network
    142s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    27/04/2023, 01:20

General

  • Target

    AsyncClient.exe

  • Size

    47KB

  • MD5

    cca9008a9ed95dba2d8c936c49a08a30

  • SHA1

    31286d0a6f43173be1b8e659616d4459080c4060

  • SHA256

    6ea0e93896ccb270f4e5d5cc733acb8bfff3babbcb8ad09573564bb4e5cac089

  • SHA512

    3e326b245c2ac068ec3c4c8382b4905bec7ccd8d36352bd31004cf4ad25d9ce8411bfd5000db15a015bb45032a9b13a7c93d4c65c2a34be531021280541417e8

  • SSDEEP

    768:uukzVT0kLd3WULgPdVmo2qDAT4H1HnPIBhmz3r0bJqdI60sJ56keUlSBDZwx:uukzVT0Mq12ntBhmsbJiI3sJ5jeysdwx

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

37.75.98.113:6666

Mutex

AsyncMutex_6SI8OoPYh

Attributes
  • delay

    3

  • install

    true

  • install_file

    svhost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 5 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 61 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1692
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svhost" /tr '"C:\Users\Admin\AppData\Roaming\svhost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1820
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svhost" /tr '"C:\Users\Admin\AppData\Roaming\svhost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1388
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp193C.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:636
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:956
      • C:\Users\Admin\AppData\Roaming\svhost.exe
        "C:\Users\Admin\AppData\Roaming\svhost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1644
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef64e9758,0x7fef64e9768,0x7fef64e9778
      2⤵
        PID:1404
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1188 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:2
        2⤵
          PID:1572
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=1492 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:8
          2⤵
            PID:628
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1616 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:8
            2⤵
              PID:1640
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2244 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:1
              2⤵
                PID:1388
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2288 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:1
                2⤵
                  PID:1332
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=3580 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:2
                  2⤵
                    PID:2184
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=2 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=1500 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:1
                    2⤵
                      PID:2260
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3784 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:8
                      2⤵
                        PID:2324
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3904 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:8
                        2⤵
                          PID:2340
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=720 --field-trial-handle=1224,i,3859899398050328425,4254014790830658346,131072 /prefetch:8
                          2⤵
                            PID:2732
                        • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                          "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                          1⤵
                            PID:636

                          Network

                                MITRE ATT&CK Enterprise v6

                                Replay Monitor

                                Loading Replay Monitor...

                                Downloads

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GCM Store\Encryption\CURRENT~RF6dbbd1.TMP

                                  Filesize

                                  16B

                                  MD5

                                  46295cac801e5d4857d09837238a6394

                                  SHA1

                                  44e0fa1b517dbf802b18faf0785eeea6ac51594b

                                  SHA256

                                  0f1bad70c7bd1e0a69562853ec529355462fcd0423263a3d39d6d0d70b780443

                                  SHA512

                                  8969402593f927350e2ceb4b5bc2a277f3754697c1961e3d6237da322257fbab42909e1a742e22223447f3a4805f8d8ef525432a7c3515a549e984d3eff72b23

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1

                                  Filesize

                                  264KB

                                  MD5

                                  f50f89a0a91564d0b8a211f8921aa7de

                                  SHA1

                                  112403a17dd69d5b9018b8cede023cb3b54eab7d

                                  SHA256

                                  b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                                  SHA512

                                  bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                                  Filesize

                                  4KB

                                  MD5

                                  8ac1ed3e9955fa550e4f319ac54013e4

                                  SHA1

                                  119cb483e5294ba7447a89c1c3e4196d36619c45

                                  SHA256

                                  a21a70b3022bb29b95d22643c7e77bdec06c7414b71021e2428211f20d53deae

                                  SHA512

                                  2b6f44d82d57ded2f536f81b46cdc3053a94f1928c378b0aee670a7ebe9e2f625ff6f1142904eabbb61b0ef7a256c2190608e716c3ff0cfa9e6c909ddeade0cc

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000004.dbtmp

                                  Filesize

                                  16B

                                  MD5

                                  6752a1d65b201c13b62ea44016eb221f

                                  SHA1

                                  58ecf154d01a62233ed7fb494ace3c3d4ffce08b

                                  SHA256

                                  0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

                                  SHA512

                                  9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

                                • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\d83a6925-fec3-4a7d-9198-2273b222820d.tmp

                                  Filesize

                                  4KB

                                  MD5

                                  0ebba4f96ed0f9f1f04fa94262989cc9

                                  SHA1

                                  ce4ec40080b4146a841bdf536bb9d85c6f85351e

                                  SHA256

                                  f98e856d85579f24462c918b0907ff358e08b14b3691560082442228a18b19eb

                                  SHA512

                                  2ab57a5fe59afd200aa7bdf3985f68997c96dc0a07a2e55c105dd4b477a6627cfd28b5a00a340485804d7cc72eb23f27925937e73b080c9eaf9a2c95f8a9bc83

                                • C:\Users\Admin\AppData\Local\Temp\tmp193C.tmp.bat

                                  Filesize

                                  150B

                                  MD5

                                  099f346f110a538f011d74952d1d0b3a

                                  SHA1

                                  704bcaf5142340e1cee2e56b56b6444abeeffcf2

                                  SHA256

                                  0c81a3efa6eb2954f82c6564550595a5cfb309d0ae3359066a64800bf0927bff

                                  SHA512

                                  7071aa08453bbc7a1a0e2c4a773efca585a3c1f15f6a6fb20098dd755a9c29f9ce8fcbd05f636ac9527f7944e1f838cdc510fba1809bc3c4efd1bbd9c730bfbe

                                • C:\Users\Admin\AppData\Local\Temp\tmp193C.tmp.bat

                                  Filesize

                                  150B

                                  MD5

                                  099f346f110a538f011d74952d1d0b3a

                                  SHA1

                                  704bcaf5142340e1cee2e56b56b6444abeeffcf2

                                  SHA256

                                  0c81a3efa6eb2954f82c6564550595a5cfb309d0ae3359066a64800bf0927bff

                                  SHA512

                                  7071aa08453bbc7a1a0e2c4a773efca585a3c1f15f6a6fb20098dd755a9c29f9ce8fcbd05f636ac9527f7944e1f838cdc510fba1809bc3c4efd1bbd9c730bfbe

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

                                  Filesize

                                  47KB

                                  MD5

                                  cca9008a9ed95dba2d8c936c49a08a30

                                  SHA1

                                  31286d0a6f43173be1b8e659616d4459080c4060

                                  SHA256

                                  6ea0e93896ccb270f4e5d5cc733acb8bfff3babbcb8ad09573564bb4e5cac089

                                  SHA512

                                  3e326b245c2ac068ec3c4c8382b4905bec7ccd8d36352bd31004cf4ad25d9ce8411bfd5000db15a015bb45032a9b13a7c93d4c65c2a34be531021280541417e8

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

                                  Filesize

                                  47KB

                                  MD5

                                  cca9008a9ed95dba2d8c936c49a08a30

                                  SHA1

                                  31286d0a6f43173be1b8e659616d4459080c4060

                                  SHA256

                                  6ea0e93896ccb270f4e5d5cc733acb8bfff3babbcb8ad09573564bb4e5cac089

                                  SHA512

                                  3e326b245c2ac068ec3c4c8382b4905bec7ccd8d36352bd31004cf4ad25d9ce8411bfd5000db15a015bb45032a9b13a7c93d4c65c2a34be531021280541417e8

                                • \Users\Admin\AppData\Roaming\svhost.exe

                                  Filesize

                                  47KB

                                  MD5

                                  cca9008a9ed95dba2d8c936c49a08a30

                                  SHA1

                                  31286d0a6f43173be1b8e659616d4459080c4060

                                  SHA256

                                  6ea0e93896ccb270f4e5d5cc733acb8bfff3babbcb8ad09573564bb4e5cac089

                                  SHA512

                                  3e326b245c2ac068ec3c4c8382b4905bec7ccd8d36352bd31004cf4ad25d9ce8411bfd5000db15a015bb45032a9b13a7c93d4c65c2a34be531021280541417e8

                                • memory/1644-68-0x0000000000D70000-0x0000000000D82000-memory.dmp

                                  Filesize

                                  72KB

                                • memory/1644-110-0x00000000044B0000-0x00000000044F0000-memory.dmp

                                  Filesize

                                  256KB

                                • memory/1692-54-0x0000000000B20000-0x0000000000B32000-memory.dmp

                                  Filesize

                                  72KB

                                • memory/1692-55-0x0000000000420000-0x0000000000460000-memory.dmp

                                  Filesize

                                  256KB