Analysis

  • max time kernel
    51s
  • max time network
    50s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-01-2025 03:28

General

  • Target

    FLXTOOLS.exe

  • Size

    63KB

  • MD5

    8b3affb035dc48cb81e416570ee9889a

  • SHA1

    bb8b2cd080000afe9b35bf923897acd6df5054f3

  • SHA256

    6b5c1e03cf018925d9b7e9c5089afe13578f7c56614cd689f23413c13819bdad

  • SHA512

    8f221bcbdf1f9a2146c3102e7daee7e4a3877e3fd83d76bf81f9cfd323c4846da8e347ff823629113d6f867909ce3d32e8d4c9f605dac7026258dc10fff71b66

  • SSDEEP

    768:EpDxI6PfZ778/IC8A+X3GDXKc5t+cV48Jg1+T4nSGGHmDbD0ph0oXrvRXtSuMdph:262ZBmDXHwcKUpUbqh9LdcuMdpqKmY7

Malware Config

Extracted

Family

asyncrat

Botnet

FLXTOOLS

C2

ohio-darkness.gl.at.ply.gg:13836

Attributes
  • delay

    1

  • install

    true

  • install_file

    FLXTOOLS.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
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Delays execution with timeout.exe 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 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 64 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of FindShellTrayWindow 25 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\FLXTOOLS.exe
    "C:\Users\Admin\AppData\Local\Temp\FLXTOOLS.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4356
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "FLXTOOLS" /tr '"C:\Users\Admin\AppData\Roaming\FLXTOOLS.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4024
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "FLXTOOLS" /tr '"C:\Users\Admin\AppData\Roaming\FLXTOOLS.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5084
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA180.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2704
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1468
      • C:\Users\Admin\AppData\Roaming\FLXTOOLS.exe
        "C:\Users\Admin\AppData\Roaming\FLXTOOLS.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4472
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:4932
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --profile-directory=Default
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4844
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0x11c,0x120,0x124,0x74,0x128,0x7ff9032546f8,0x7ff903254708,0x7ff903254718
      2⤵
        PID:2020
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2132 /prefetch:2
        2⤵
          PID:1536
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2240 /prefetch:3
          2⤵
            PID:4952
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2748 /prefetch:8
            2⤵
              PID:1652
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3368 /prefetch:1
              2⤵
                PID:348
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3440 /prefetch:1
                2⤵
                  PID:1568
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4908 /prefetch:1
                  2⤵
                    PID:1768
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3764 /prefetch:1
                    2⤵
                      PID:1176
                    • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3664 /prefetch:8
                      2⤵
                        PID:1764
                      • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3664 /prefetch:8
                        2⤵
                          PID:3524
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3564 /prefetch:1
                          2⤵
                            PID:4712
                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5236 /prefetch:1
                            2⤵
                              PID:1292
                            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2120,11837794478564874484,3026936377886075752,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3980 /prefetch:1
                              2⤵
                                PID:1764
                            • C:\Windows\System32\CompPkgSrv.exe
                              C:\Windows\System32\CompPkgSrv.exe -Embedding
                              1⤵
                                PID:1204
                              • C:\Windows\System32\CompPkgSrv.exe
                                C:\Windows\System32\CompPkgSrv.exe -Embedding
                                1⤵
                                  PID:2992

                                Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

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                                Downloads

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

                                  Filesize

                                  871B

                                  MD5

                                  d58f949aad7df2e7b55248bfdfc6e1b8

                                  SHA1

                                  6713cad396b5808b66ede2dd9b169e00d5e5018f

                                  SHA256

                                  5e1611e4d915fd9759825811fa4463f09172889f85889a2942be1561948fab8a

                                  SHA512

                                  bdddb838108c4f3f0a7737703cbde935fe26aaea97459bb099c4c773c0789997283d7f20ac7ea4ac2aedef23515afc0b251b5b461aa12d3b7a60846b87b26e38

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                                  Filesize

                                  152B

                                  MD5

                                  61cef8e38cd95bf003f5fdd1dc37dae1

                                  SHA1

                                  11f2f79ecb349344c143eea9a0fed41891a3467f

                                  SHA256

                                  ae671613623b4477fbd5daf1fd2d148ae2a09ddcc3804b2b6d4ffcb60b317e3e

                                  SHA512

                                  6fb9b333fe0e8fde19fdd0bd01a1990a4e60a87c0a02bc8297da1206e42f8690d06b030308e58c862e9e77714a585eed7cc1627590d99a10aeb77fc0dd3d864d

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                                  Filesize

                                  152B

                                  MD5

                                  0a9dc42e4013fc47438e96d24beb8eff

                                  SHA1

                                  806ab26d7eae031a58484188a7eb1adab06457fc

                                  SHA256

                                  58d66151799526b3fa372552cd99b385415d9e9a119302b99aadc34dd51dd151

                                  SHA512

                                  868d6b421ae2501a519595d0c34ddef25b2a98b082c5203da8349035f1f6764ddf183197f1054e7e86a752c71eccbc0649e515b63c55bc18cf5f0592397e258f

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\5cc80487-aa77-4927-938f-91335501cc58.tmp

                                  Filesize

                                  5KB

                                  MD5

                                  3fe458fa72b2da38645f460324325000

                                  SHA1

                                  51cffba96afeda94b178a514390824ef94b2535d

                                  SHA256

                                  f6c0a158220aeb0bded9cc54dbb2fa96c10e717fc89eec79678410c85b943709

                                  SHA512

                                  a043e500c839d991e71e8863417e4af0ba59caeb460e0e848f0140a594bca05b411be65683491a9ee21ca56e02eb0e76ef9ec19812a1d03f2cd61fd8666f3cf2

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                                  Filesize

                                  6KB

                                  MD5

                                  642f9eecebe706b01ca9210806e0f8ae

                                  SHA1

                                  dc556da6086d03d5056db24fce898387ba9be330

                                  SHA256

                                  80f53913632f04be4803c891b956d9185c7b0fdf64b24ae5e226b6699cf9d27b

                                  SHA512

                                  05b3dab372b6065e47d246c0a2f0db8cfaafab9c8d34835f1a638d1444e2d9381b4ec76aae294efe38c59eeb73b109170a66f6c75b0e8f1c1845a9b7ff1f88d8

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

                                  Filesize

                                  16B

                                  MD5

                                  6752a1d65b201c13b62ea44016eb221f

                                  SHA1

                                  58ecf154d01a62233ed7fb494ace3c3d4ffce08b

                                  SHA256

                                  0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

                                  SHA512

                                  9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

                                • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

                                  Filesize

                                  10KB

                                  MD5

                                  5e5ed1b38ec6d0f4ba09a37c075777fc

                                  SHA1

                                  27b8db6a1c1400a38a85d6b98dc3633bdf8810b1

                                  SHA256

                                  fabd53702a65c60d0084896c21d1e224d3d5ce9390203a6edc22701770ea9cfa

                                  SHA512

                                  5adf2a4902959aa1ac85c1c4efa3bddfa12c451f25075fb2fcfc8f70769292675e71b61d099f2b7cd903bca60e9aaef4012a14a03fd0adeb7e371e84d6f4b44c

                                • C:\Users\Admin\AppData\Local\Temp\tmpA180.tmp.bat

                                  Filesize

                                  152B

                                  MD5

                                  ab45c3ba30245284dd128f6fe6e77f6e

                                  SHA1

                                  0d66d112f390e6334e1b668bdaabaeeea6a74acb

                                  SHA256

                                  ea6ba75609917a983f9a9e3c8d07cbd96c6ab210de743967349d825a62e96e00

                                  SHA512

                                  b281a39ec33c3b8f16166e716c0726b9bf7943a5077f3b35d0639b17f71359406f7c2c8ea367a629281bb019c0ddf1fa9b13577feb66b5a2b75fb6098b67138d

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

                                  Filesize

                                  63KB

                                  MD5

                                  8b3affb035dc48cb81e416570ee9889a

                                  SHA1

                                  bb8b2cd080000afe9b35bf923897acd6df5054f3

                                  SHA256

                                  6b5c1e03cf018925d9b7e9c5089afe13578f7c56614cd689f23413c13819bdad

                                  SHA512

                                  8f221bcbdf1f9a2146c3102e7daee7e4a3877e3fd83d76bf81f9cfd323c4846da8e347ff823629113d6f867909ce3d32e8d4c9f605dac7026258dc10fff71b66

                                • memory/4356-7-0x00007FF9094B0000-0x00007FF909F71000-memory.dmp

                                  Filesize

                                  10.8MB

                                • memory/4356-2-0x00007FF9094B0000-0x00007FF909F71000-memory.dmp

                                  Filesize

                                  10.8MB

                                • memory/4356-1-0x0000000000230000-0x0000000000246000-memory.dmp

                                  Filesize

                                  88KB

                                • memory/4356-0-0x00007FF9094B3000-0x00007FF9094B5000-memory.dmp

                                  Filesize

                                  8KB