Analysis

  • max time kernel
    143s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2024, 14:51

General

  • Target

    invoice-INVR-2024012000.exe

  • Size

    429KB

  • MD5

    1ae050798555154c3c057598b0ccb3bf

  • SHA1

    d570386aa83a9264794b5f562bdd92ad40a845c9

  • SHA256

    923cf7d4a3785f11ac119a4a429a46fbcf1ff745d5865ce05efd9ef0a1ccef45

  • SHA512

    50d970b0a7612a19a0dce40be5595a707912b65ca767e88661fcf693287cdf1e75c2ca00c81fa1c7ec46ea775b12b2126300c4a5ad62212447f32d9bd48c9fcd

  • SSDEEP

    6144:4AMl3A4aHuEzu2pQ4lQPaQ7HnyHPMCQDw3RdoyPn3WSu9UxXVGYUML35q9k8Ljpn:LU3YlO4l4aQD2IEL7PGb9wl8Mid

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

203.20.113.158:6606

203.20.113.158:7707

203.20.113.158:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    microsotf.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 3 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 31 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\invoice-INVR-2024012000.exe
    "C:\Users\Admin\AppData\Local\Temp\invoice-INVR-2024012000.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1524
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\cDTmbkDzaNG.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1956
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\cDTmbkDzaNG" /XML "C:\Users\Admin\AppData\Local\Temp\tmpADF3.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4500
    • C:\Users\Admin\AppData\Local\Temp\invoice-INVR-2024012000.exe
      "C:\Users\Admin\AppData\Local\Temp\invoice-INVR-2024012000.exe"
      2⤵
      • Checks computer location settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:528
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC10E.tmp.bat""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:312
        • C:\Users\Admin\AppData\Roaming\microsotf.exe
          "C:\Users\Admin\AppData\Roaming\microsotf.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1700
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\cDTmbkDzaNG.exe"
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:708
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\cDTmbkDzaNG" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7EA.tmp"
            5⤵
            • Creates scheduled task(s)
            PID:2924
          • C:\Users\Admin\AppData\Roaming\microsotf.exe
            "C:\Users\Admin\AppData\Roaming\microsotf.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:3276
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "microsotf" /tr '"C:\Users\Admin\AppData\Roaming\microsotf.exe"' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1368
  • C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "microsotf" /tr '"C:\Users\Admin\AppData\Roaming\microsotf.exe"'
    1⤵
    • Creates scheduled task(s)
    PID:3108
  • C:\Windows\SysWOW64\timeout.exe
    timeout 3
    1⤵
    • Delays execution with timeout.exe
    PID:2592

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\invoice-INVR-2024012000.exe.log

          Filesize

          1KB

          MD5

          8ec831f3e3a3f77e4a7b9cd32b48384c

          SHA1

          d83f09fd87c5bd86e045873c231c14836e76a05c

          SHA256

          7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

          SHA512

          26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

          Filesize

          2KB

          MD5

          968cb9309758126772781b83adb8a28f

          SHA1

          8da30e71accf186b2ba11da1797cf67f8f78b47c

          SHA256

          92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

          SHA512

          4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

          Filesize

          18KB

          MD5

          105dfa28d0ddd1a1805e6896c8920034

          SHA1

          9fe9d273add147e154e9b02303db545c72df8f4a

          SHA256

          70423328450efa9ab5db14995a2648e815c526118fdf7313d537dfc3138d5287

          SHA512

          21c7edaf1b56a38b9c2a1ba0bee7e8065ea12479bdb85ee86c05e641923f89a445b89790d2db9bd2a9da799b3bcb7de4df32fb6fc6e011aa48bd1c0091e75943

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4ujsffpk.fa4.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\tmpADF3.tmp

          Filesize

          1KB

          MD5

          8617e8cb59c0ae115057557b72a499cd

          SHA1

          e712f3034b25c1ff6a7ff4e855791227b114836a

          SHA256

          d6ffb678f979e911abcd4492f054f41af805abb2f3017df2300d0921f9e6f48a

          SHA512

          e53f141c66b6c4ca1605f59093e3d34d21bd13b2c5eaaeb9514cbfb35905a8ec2932ea7a6cae94e4060b5da60f3f058a560f6fb658594bcb906512daaca67570

        • C:\Users\Admin\AppData\Local\Temp\tmpC10E.tmp.bat

          Filesize

          153B

          MD5

          77d817e681eb2d7c2149f321c872f5d7

          SHA1

          91cd5355e16ba3f89a57730cb19c1a405b2b2070

          SHA256

          71f2990827ffe257fc3f24b863d93ac3fd5fa79003073a9f7213b2ca8dd5d454

          SHA512

          04b21d984baa9726d00263507286eaf5370ce82d237072c78f138d60520d95bebeca1b961d767003a3f54fb08053a13df1b8d8875406bbe4546b17ad61fd7e21

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

          Filesize

          204KB

          MD5

          ec5d1c15200aacaaba32d179f4bc3f54

          SHA1

          1832e60a4c1fbe745eca0c6a88d3abbe6207c9d5

          SHA256

          43e86b88e28fd0de3babc34b019c64ade6ac3ea6ae5d93d47177aa0016896137

          SHA512

          6d5e16f8d648844b7e7071204d447a3a1498d81b889af08d0f34fddfc10c0282af844ed5b05cd9c5c3f4517fd1af8c643551f272eb97473b45b8ed241f655ff9

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

          Filesize

          420KB

          MD5

          c5c0201fff9f1e5ff412e94bfc52663a

          SHA1

          268dd02109971903cd0f7cc8d9e95f8cb2628ee0

          SHA256

          126935d5511c09259a12b8a79b771da5ca53e8d3fbbd5cd5e74919689644471a

          SHA512

          233bae1bb91358f2d28af182a1b2dd0fe8bb1b5ac1570f58185dddf56f5c1f5fa796d504e30443db7488699ec287a78973a7f59a0ed6736b7107a6701aa9ade7

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

          Filesize

          255KB

          MD5

          10b1595ec906e23650edd19cad7d7e2f

          SHA1

          f529fb6fc8faa86d5f8056f1f061b0b2157cd7ba

          SHA256

          be6959d1c3aaceac0cef6fd025fcbaf4e0eae1186032a230d0d56e6f7c53f805

          SHA512

          64c29fac7fd6d70cd39b7b876f37d0a773b67cc0b38814dce108001ab96325cf08cd3782296150d3832d0b8f1e51442f6fb84770a973ae348bd1f1a85931f464

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

          Filesize

          429KB

          MD5

          1ae050798555154c3c057598b0ccb3bf

          SHA1

          d570386aa83a9264794b5f562bdd92ad40a845c9

          SHA256

          923cf7d4a3785f11ac119a4a429a46fbcf1ff745d5865ce05efd9ef0a1ccef45

          SHA512

          50d970b0a7612a19a0dce40be5595a707912b65ca767e88661fcf693287cdf1e75c2ca00c81fa1c7ec46ea775b12b2126300c4a5ad62212447f32d9bd48c9fcd

        • memory/528-58-0x0000000004DB0000-0x0000000004DC0000-memory.dmp

          Filesize

          64KB

        • memory/528-72-0x0000000075330000-0x0000000075AE0000-memory.dmp

          Filesize

          7.7MB

        • memory/528-24-0x0000000075330000-0x0000000075AE0000-memory.dmp

          Filesize

          7.7MB

        • memory/528-21-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/708-83-0x00000000029F0000-0x0000000002A00000-memory.dmp

          Filesize

          64KB

        • memory/708-88-0x0000000005B60000-0x0000000005EB4000-memory.dmp

          Filesize

          3.3MB

        • memory/708-119-0x0000000075320000-0x0000000075AD0000-memory.dmp

          Filesize

          7.7MB

        • memory/708-117-0x0000000007760000-0x0000000007774000-memory.dmp

          Filesize

          80KB

        • memory/708-116-0x0000000007710000-0x0000000007721000-memory.dmp

          Filesize

          68KB

        • memory/708-81-0x0000000075320000-0x0000000075AD0000-memory.dmp

          Filesize

          7.7MB

        • memory/708-115-0x00000000073D0000-0x0000000007473000-memory.dmp

          Filesize

          652KB

        • memory/708-105-0x0000000075C20000-0x0000000075C6C000-memory.dmp

          Filesize

          304KB

        • memory/708-84-0x00000000029F0000-0x0000000002A00000-memory.dmp

          Filesize

          64KB

        • memory/708-104-0x000000007F730000-0x000000007F740000-memory.dmp

          Filesize

          64KB

        • memory/708-103-0x00000000029F0000-0x0000000002A00000-memory.dmp

          Filesize

          64KB

        • memory/708-102-0x00000000064D0000-0x000000000651C000-memory.dmp

          Filesize

          304KB

        • memory/1524-19-0x0000000075330000-0x0000000075AE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1524-5-0x0000000005250000-0x000000000525A000-memory.dmp

          Filesize

          40KB

        • memory/1524-1-0x0000000075330000-0x0000000075AE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1524-8-0x00000000075B0000-0x00000000075BC000-memory.dmp

          Filesize

          48KB

        • memory/1524-2-0x0000000005860000-0x0000000005E04000-memory.dmp

          Filesize

          5.6MB

        • memory/1524-7-0x0000000007580000-0x0000000007588000-memory.dmp

          Filesize

          32KB

        • memory/1524-10-0x0000000009FE0000-0x000000000A07C000-memory.dmp

          Filesize

          624KB

        • memory/1524-0-0x0000000000800000-0x0000000000872000-memory.dmp

          Filesize

          456KB

        • memory/1524-25-0x0000000075330000-0x0000000075AE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1524-3-0x00000000052B0000-0x0000000005342000-memory.dmp

          Filesize

          584KB

        • memory/1524-9-0x00000000077C0000-0x000000000780C000-memory.dmp

          Filesize

          304KB

        • memory/1524-6-0x0000000005840000-0x0000000005858000-memory.dmp

          Filesize

          96KB

        • memory/1524-4-0x00000000051B0000-0x00000000051C0000-memory.dmp

          Filesize

          64KB

        • memory/1700-85-0x0000000075320000-0x0000000075AD0000-memory.dmp

          Filesize

          7.7MB

        • memory/1700-77-0x0000000075320000-0x0000000075AD0000-memory.dmp

          Filesize

          7.7MB

        • memory/1700-78-0x0000000004BE0000-0x0000000004BF0000-memory.dmp

          Filesize

          64KB

        • memory/1700-100-0x0000000075320000-0x0000000075AD0000-memory.dmp

          Filesize

          7.7MB

        • memory/1956-42-0x000000007F6B0000-0x000000007F6C0000-memory.dmp

          Filesize

          64KB

        • memory/1956-41-0x00000000023E0000-0x00000000023F0000-memory.dmp

          Filesize

          64KB

        • memory/1956-71-0x0000000075330000-0x0000000075AE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1956-64-0x0000000007410000-0x000000000742A000-memory.dmp

          Filesize

          104KB

        • memory/1956-63-0x0000000007310000-0x0000000007324000-memory.dmp

          Filesize

          80KB

        • memory/1956-62-0x0000000007300000-0x000000000730E000-memory.dmp

          Filesize

          56KB

        • memory/1956-61-0x00000000072D0000-0x00000000072E1000-memory.dmp

          Filesize

          68KB

        • memory/1956-60-0x0000000007350000-0x00000000073E6000-memory.dmp

          Filesize

          600KB

        • memory/1956-59-0x0000000007140000-0x000000000714A000-memory.dmp

          Filesize

          40KB

        • memory/1956-56-0x0000000007710000-0x0000000007D8A000-memory.dmp

          Filesize

          6.5MB

        • memory/1956-57-0x00000000070D0000-0x00000000070EA000-memory.dmp

          Filesize

          104KB

        • memory/1956-43-0x0000000006390000-0x00000000063C2000-memory.dmp

          Filesize

          200KB

        • memory/1956-44-0x0000000071BF0000-0x0000000071C3C000-memory.dmp

          Filesize

          304KB

        • memory/1956-55-0x0000000006F90000-0x0000000007033000-memory.dmp

          Filesize

          652KB

        • memory/1956-54-0x0000000006370000-0x000000000638E000-memory.dmp

          Filesize

          120KB

        • memory/1956-65-0x00000000073F0000-0x00000000073F8000-memory.dmp

          Filesize

          32KB

        • memory/1956-20-0x0000000004FE0000-0x0000000005608000-memory.dmp

          Filesize

          6.2MB

        • memory/1956-40-0x00000000060B0000-0x00000000060FC000-memory.dmp

          Filesize

          304KB

        • memory/1956-39-0x0000000005DC0000-0x0000000005DDE000-memory.dmp

          Filesize

          120KB

        • memory/1956-38-0x0000000005760000-0x0000000005AB4000-memory.dmp

          Filesize

          3.3MB

        • memory/1956-27-0x0000000005680000-0x00000000056E6000-memory.dmp

          Filesize

          408KB

        • memory/1956-28-0x00000000056F0000-0x0000000005756000-memory.dmp

          Filesize

          408KB

        • memory/1956-26-0x0000000004E70000-0x0000000004E92000-memory.dmp

          Filesize

          136KB

        • memory/1956-16-0x0000000075330000-0x0000000075AE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1956-17-0x00000000023E0000-0x00000000023F0000-memory.dmp

          Filesize

          64KB

        • memory/1956-15-0x0000000002470000-0x00000000024A6000-memory.dmp

          Filesize

          216KB

        • memory/3276-90-0x0000000075320000-0x0000000075AD0000-memory.dmp

          Filesize

          7.7MB

        • memory/3276-120-0x0000000005110000-0x0000000005120000-memory.dmp

          Filesize

          64KB

        • memory/3276-123-0x0000000075320000-0x0000000075AD0000-memory.dmp

          Filesize

          7.7MB