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Analysis

  • max time kernel
    145s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/01/2025, 03:38

General

  • Target

    f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.exe

  • Size

    1.1MB

  • MD5

    d658dadccb4a21c0b50d0dc0406f9c3f

  • SHA1

    eb50304a3fcc3664f7f7f598830eb379f347b793

  • SHA256

    f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56

  • SHA512

    73b4fae7dc1a8363a6a2eea1610d2a6655367dbac393e7e00acf6277773d561f76d4bc47824de3e588d5ec91566b35f0233d3f143f80bcf7dd9b57c2a54c86bd

  • SSDEEP

    24576:QMjh7ExHIySDQwfx7FbD/KhlcBQgbLY1Yl05bmktUNudtJjdPrF:jmHZSDQyJP/+jgbLuYlab7SNudXjdTF

Malware Config

Extracted

Family

asyncrat

Version

Esco Private rat

Botnet

Default

C2

93.123.109.39:4449

Mutex

ozvhxbdcbanqw

Attributes
  • delay

    1

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • VenomRAT 1 IoCs

    Detects VenomRAT.

  • Venomrat family
  • Async RAT payload 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 8 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

    Run Powershell to execute payload.

  • System Location Discovery: System Language Discovery 1 TTPs 7 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
  • Suspicious behavior: EnumeratesProcesses 49 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.exe
    "C:\Users\Admin\AppData\Local\Temp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2172
    • C:\Users\Admin\AppData\Local\Temp\is-VST3D.tmp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-VST3D.tmp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.tmp" /SL5="$8004E,770488,161792,C:\Users\Admin\AppData\Local\Temp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3688
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C timeout /T 3 & "C:\Users\Admin\AppData\Local\Temp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.exe" /VERYSILENT /SUPPRESSMSGBOXES
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3108
        • C:\Windows\SysWOW64\timeout.exe
          timeout /T 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:4920
        • C:\Users\Admin\AppData\Local\Temp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.exe
          "C:\Users\Admin\AppData\Local\Temp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.exe" /VERYSILENT /SUPPRESSMSGBOXES
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:644
          • C:\Users\Admin\AppData\Local\Temp\is-V3MSU.tmp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.tmp
            "C:\Users\Admin\AppData\Local\Temp\is-V3MSU.tmp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.tmp" /SL5="$60114,770488,161792,C:\Users\Admin\AppData\Local\Temp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.exe" /VERYSILENT /SUPPRESSMSGBOXES
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of WriteProcessMemory
            PID:1592
            • C:\Windows\SysWOW64\regsvr32.exe
              "regsvr32.exe" /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\2crypt32.drv"
              6⤵
              • Loads dropped DLL
              • System Location Discovery: System Language Discovery
              • Suspicious use of WriteProcessMemory
              PID:4504
              • C:\Windows\system32\regsvr32.exe
                /s /i:SYNC "C:\Users\Admin\AppData\Roaming\\2crypt32.drv"
                7⤵
                • Loads dropped DLL
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:2116
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\2crypt32.drv' }) { exit 0 } else { exit 1 }"
                  8⤵
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4736
                • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                  "powershell" "Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute \"regsvr32\" -Argument \"/S /i:SYNC C:\Users\Admin\AppData\Roaming\2crypt32.drv\") -Trigger (New-ScheduledTaskTrigger -Once -At (Get-Date).AddMinutes(1) -RepetitionInterval (New-TimeSpan -Minutes 1)) -TaskName 'MicrosoftEdgeUpdateTaskMachineUA{E0404083-61E7-4517-DCE5-79D8A009AA8D}' -Description 'Default' -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DontStopIfGoingOnBatteries -ExecutionTimeLimit 0) -RunLevel Highest"
                  8⤵
                  • Command and Scripting Interpreter: PowerShell
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:3032
  • C:\Windows\system32\regsvr32.EXE
    C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\2crypt32.drv
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4140
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\2crypt32.drv' }) { exit 0 } else { exit 1 }"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:4512
  • C:\Windows\system32\regsvr32.EXE
    C:\Windows\system32\regsvr32.EXE /S /i:SYNC C:\Users\Admin\AppData\Roaming\2crypt32.drv
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4724
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell" -Command "if (Get-ScheduledTask | Where-Object { $_.Actions.Execute -eq 'regsvr32' -and $_.Actions.Arguments -eq '/S /i:SYNC C:\Users\Admin\AppData\Roaming\2crypt32.drv' }) { exit 0 } else { exit 1 }"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      PID:2804

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3KB

    MD5

    3ffce848af907464c20a20e1b430f78a

    SHA1

    fbcd91a5c226d474235be920cf49e3344893fc1f

    SHA256

    25213a6685a6fd21a2aa43c417891703333579ad784f3896976b44bcfcdb009e

    SHA512

    1adaf6d68441a32b459b6071dcfdae404ab1e37bb0c6511e08d49717f9043679bdd7ca3324be184ece522e6516eedc04203ffccb5f9ea790bd35a84db9b944bf

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

    Filesize

    1KB

    MD5

    c8c29f1f588816cb69fcebf642891720

    SHA1

    968d91f771b5e235c91952025509479c4456b44e

    SHA256

    2e1d2b0a86abe46d40843dbc522f6c9891671b21c1ac61e21d32f7245a93eb8b

    SHA512

    6b19696757654762ec551388c04142d4404892314c3e8a811b3260834dd6110b57be9aa4a0497ff579a4936c91cbdfbf7a938f676ee24e7476ecdd1b668cac3a

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

    Filesize

    1KB

    MD5

    c1f1620b98d96dc5b6be9238d00b2e4c

    SHA1

    943f2628dc682c5b5cbb6685d4d1fe703a817d42

    SHA256

    64a1425d7554efe23ad3224c95bc438a21a79b5cfd34d96ed834557d3f95ef98

    SHA512

    a0b49e4370837f287ebef839ebb64eef88bd20d85c905a85dba8adad2a6d7c0e2b0c34a1dd3501630093f0844cb97701dd0c96ac85e0b9e3c649b4f0e3137169

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

    Filesize

    1KB

    MD5

    62ba4ea474aa0661cb364833cd6f342e

    SHA1

    bedea24ce0ef32bd8396e3b8f1fc6c2f27d49420

    SHA256

    2c470425abe0953386b291a5539ce6530beb77d03743356c6606de1332dedad5

    SHA512

    b97f14afab17976e43fbb953bea4a1b1fb98f15efd9267fca7e67cf23ed53bdeb5b9b6d2e3b7fca7df858b9f1d154da62200d4819d2eeab39aa998352211f621

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xteutf2g.gkl.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\is-67B59.tmp\_isetup\_isdecmp.dll

    Filesize

    13KB

    MD5

    a813d18268affd4763dde940246dc7e5

    SHA1

    c7366e1fd925c17cc6068001bd38eaef5b42852f

    SHA256

    e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

    SHA512

    b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

  • C:\Users\Admin\AppData\Local\Temp\is-JST01.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • C:\Users\Admin\AppData\Local\Temp\is-VST3D.tmp\f725bf614120e26b774341f54d73210aea60205c2723e155cb6fd09fa4411b56.tmp

    Filesize

    1.1MB

    MD5

    bcc236a3921e1388596a42b05686ff5e

    SHA1

    43bffbbac6a1bf5f1fa21e971e06e6f1d0af9263

    SHA256

    43a656bcd060e8a36502ca2deb878d56a99078f13d3e57dcd73a87128588c9e9

    SHA512

    e3baaf1a8f4eb0e1ab57a1fb35bc7ded476606b65fafb09835d34705d8c661819c3cfa0ecc43c5a0d0085fd570df581438de27944e054e12c09a6933bbf5ce04

  • C:\Users\Admin\AppData\Roaming\2crypt32.drv

    Filesize

    1.4MB

    MD5

    221be8861ed61d34671e8960677f4bcd

    SHA1

    cc56c6ed1452545ded9330996e7458b0aedfb2b5

    SHA256

    a4766645820a4f2bb25ef320eafabed7da544be1403eb9290227e751123cb14f

    SHA512

    45c7a7fe74e868b6689b6b1f1a750f2ddabdd1bff37637fcc6aac848a35d01820e820c4271e6f98fcb0a7096f27cadb020cb2ad72c1842add626986d6cc08fda

  • memory/644-20-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/644-18-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/644-47-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/1592-45-0x0000000000400000-0x000000000052D000-memory.dmp

    Filesize

    1.2MB

  • memory/2116-80-0x00007FFA8B460000-0x00007FFA8B572000-memory.dmp

    Filesize

    1.1MB

  • memory/2116-78-0x0000000002A00000-0x0000000002A18000-memory.dmp

    Filesize

    96KB

  • memory/2172-0-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/2172-51-0x0000000000400000-0x0000000000432000-memory.dmp

    Filesize

    200KB

  • memory/2172-2-0x0000000000401000-0x0000000000417000-memory.dmp

    Filesize

    88KB

  • memory/3688-50-0x0000000000400000-0x000000000052D000-memory.dmp

    Filesize

    1.2MB

  • memory/3688-7-0x0000000000400000-0x000000000052D000-memory.dmp

    Filesize

    1.2MB

  • memory/4140-98-0x00007FFA8B460000-0x00007FFA8B572000-memory.dmp

    Filesize

    1.1MB

  • memory/4724-117-0x00007FFA8B460000-0x00007FFA8B572000-memory.dmp

    Filesize

    1.1MB

  • memory/4736-61-0x00000239732B0000-0x00000239732D2000-memory.dmp

    Filesize

    136KB