Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    11-07-2022 12:19

General

  • Target

    Cryptded_protected.sfx.exe

  • Size

    1.7MB

  • MD5

    8a9c5b9db9e0bca2aa8155197462650c

  • SHA1

    5d2422bff61c219a6f3d2974e99c310eab1657b5

  • SHA256

    283906c670f0a64dbd5f3ce78354ef08071db8b728c3ee93f55195da68fd7d1c

  • SHA512

    81b06cc10d7959dc15648ad255351c128ef097ce2f10bc3eb63dc19f93ceb4cceb9d1adb2e4e8a033818f1aebb6fc72193f5dc61ee74a77f482cb29cac8cebab

Malware Config

Extracted

Family

44caliber

C2

https://discord.com/api/webhooks/963884131157168128/l7y0A3as75Se94o7XMk4zXPVahSSRfUXKz2j0cONgRgga6ZiO0oAtr3nqCmT9TlwHPnJ

Signatures

  • 44Caliber

    An open source infostealer written in C#.

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Executes dropped EXE 4 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Drops startup file 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops autorun.inf file 1 TTPs 3 IoCs

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

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 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 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Cryptded_protected.sfx.exe
    "C:\Users\Admin\AppData\Local\Temp\Cryptded_protected.sfx.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:928
    • C:\Users\Admin\AppData\Local\Temp\Cryptded_protected.exe
      "C:\Users\Admin\AppData\Local\Temp\Cryptded_protected.exe"
      2⤵
      • Executes dropped EXE
      • Checks computer location settings
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2340
      • C:\Users\Admin\AppData\Local\Temp\Umbrella.flv.exe
        "C:\Users\Admin\AppData\Local\Temp\Umbrella.flv.exe"
        3⤵
        • Executes dropped EXE
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:4484
        • C:\Users\Admin\AppData\Roaming\svhost.exe
          "C:\Users\Admin\AppData\Roaming\svhost.exe"
          4⤵
          • Executes dropped EXE
          • Drops startup file
          • Adds Run key to start application
          • Drops autorun.inf file
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3688
          • C:\Windows\SysWOW64\netsh.exe
            netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svhost.exe" "svhost.exe" ENABLE
            5⤵
            • Modifies Windows Firewall
            PID:2356
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /F /IM Exsample.exe
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1584
      • C:\Users\Admin\AppData\Local\Temp\Insidious (2).exe
        "C:\Users\Admin\AppData\Local\Temp\Insidious (2).exe"
        3⤵
        • Executes dropped EXE
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4536
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $file='C:\Users\Admin\AppData\Local\Temp\Cryptded_protected.exe';for($i=1;$i -le 600 -and (Test-Path $file -PathType leaf);$i++){Remove-Item $file;Start-Sleep -m 100}
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4180

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Cryptded_protected.exe

    Filesize

    1.5MB

    MD5

    fc24752914e03759c7cc97e560154868

    SHA1

    9790816345ee7f10a0336f4013864c565c75de89

    SHA256

    a0de3c7f5026e72496e15c3fcb24947aa54e2d615bed91bc8f44fd07a2553b44

    SHA512

    7a7082c640fbcb54a9247848dde589258a7182ff2284c166372465f5d7a76ab3ce89cc7d98bba9fab3a670957655e8fb0337cd7f836cc1f88ccfe6aa980f904e

  • C:\Users\Admin\AppData\Local\Temp\Cryptded_protected.exe

    Filesize

    1.5MB

    MD5

    fc24752914e03759c7cc97e560154868

    SHA1

    9790816345ee7f10a0336f4013864c565c75de89

    SHA256

    a0de3c7f5026e72496e15c3fcb24947aa54e2d615bed91bc8f44fd07a2553b44

    SHA512

    7a7082c640fbcb54a9247848dde589258a7182ff2284c166372465f5d7a76ab3ce89cc7d98bba9fab3a670957655e8fb0337cd7f836cc1f88ccfe6aa980f904e

  • C:\Users\Admin\AppData\Local\Temp\Insidious (2).exe

    Filesize

    252KB

    MD5

    d7595446b3398cd3f737047a2ea51e6b

    SHA1

    3149f2afed1ee0b7b64afcd0ddfe52b982c07983

    SHA256

    a09ef6e960ea808cfd8d3031957e7d8213b03b8ce37e2cafe905d43965635975

    SHA512

    dc95b3a9117f1e52e735b316a2828e649a904120c604505d071d70f5fdeba40396f1de8f39292e9651deeed6fcb2447026c63383491b080abb9416839bbcd00c

  • C:\Users\Admin\AppData\Local\Temp\Insidious (2).exe

    Filesize

    252KB

    MD5

    d7595446b3398cd3f737047a2ea51e6b

    SHA1

    3149f2afed1ee0b7b64afcd0ddfe52b982c07983

    SHA256

    a09ef6e960ea808cfd8d3031957e7d8213b03b8ce37e2cafe905d43965635975

    SHA512

    dc95b3a9117f1e52e735b316a2828e649a904120c604505d071d70f5fdeba40396f1de8f39292e9651deeed6fcb2447026c63383491b080abb9416839bbcd00c

  • C:\Users\Admin\AppData\Local\Temp\Umbrella.flv.exe

    Filesize

    36KB

    MD5

    e99f837607cb3c47ea0a29cf3e3243f5

    SHA1

    c94b04439c4151bdd0482df65699c2e516b2eff2

    SHA256

    4d92d5b42d93bfadff3454236d10a2ff63bb02dbe0332ea83db215df6ded55bb

    SHA512

    6b7dbfb18395199ae3416d7aeaf18d4b0d3e1fc0168c09cf4f4ec95a7e451121dbf8ba1e4ed2a95ccdcbb56cf27502648308b7fb7a0e33272bdcb9f2aa55f853

  • C:\Users\Admin\AppData\Local\Temp\Umbrella.flv.exe

    Filesize

    36KB

    MD5

    e99f837607cb3c47ea0a29cf3e3243f5

    SHA1

    c94b04439c4151bdd0482df65699c2e516b2eff2

    SHA256

    4d92d5b42d93bfadff3454236d10a2ff63bb02dbe0332ea83db215df6ded55bb

    SHA512

    6b7dbfb18395199ae3416d7aeaf18d4b0d3e1fc0168c09cf4f4ec95a7e451121dbf8ba1e4ed2a95ccdcbb56cf27502648308b7fb7a0e33272bdcb9f2aa55f853

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

    Filesize

    36KB

    MD5

    e99f837607cb3c47ea0a29cf3e3243f5

    SHA1

    c94b04439c4151bdd0482df65699c2e516b2eff2

    SHA256

    4d92d5b42d93bfadff3454236d10a2ff63bb02dbe0332ea83db215df6ded55bb

    SHA512

    6b7dbfb18395199ae3416d7aeaf18d4b0d3e1fc0168c09cf4f4ec95a7e451121dbf8ba1e4ed2a95ccdcbb56cf27502648308b7fb7a0e33272bdcb9f2aa55f853

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

    Filesize

    36KB

    MD5

    e99f837607cb3c47ea0a29cf3e3243f5

    SHA1

    c94b04439c4151bdd0482df65699c2e516b2eff2

    SHA256

    4d92d5b42d93bfadff3454236d10a2ff63bb02dbe0332ea83db215df6ded55bb

    SHA512

    6b7dbfb18395199ae3416d7aeaf18d4b0d3e1fc0168c09cf4f4ec95a7e451121dbf8ba1e4ed2a95ccdcbb56cf27502648308b7fb7a0e33272bdcb9f2aa55f853

  • memory/1584-164-0x0000000000000000-mapping.dmp

  • memory/2340-134-0x0000000000400000-0x00000000007D5000-memory.dmp

    Filesize

    3.8MB

  • memory/2340-130-0x0000000000000000-mapping.dmp

  • memory/2340-144-0x0000000000400000-0x00000000007D5000-memory.dmp

    Filesize

    3.8MB

  • memory/2340-133-0x0000000000400000-0x00000000007D5000-memory.dmp

    Filesize

    3.8MB

  • memory/2356-163-0x0000000000000000-mapping.dmp

  • memory/3688-165-0x0000000073050000-0x0000000073601000-memory.dmp

    Filesize

    5.7MB

  • memory/3688-162-0x0000000073050000-0x0000000073601000-memory.dmp

    Filesize

    5.7MB

  • memory/3688-158-0x0000000000000000-mapping.dmp

  • memory/4180-148-0x00000000058B0000-0x00000000058D2000-memory.dmp

    Filesize

    136KB

  • memory/4180-147-0x00000000059D0000-0x0000000005FF8000-memory.dmp

    Filesize

    6.2MB

  • memory/4180-149-0x00000000061B0000-0x0000000006216000-memory.dmp

    Filesize

    408KB

  • memory/4180-150-0x0000000006290000-0x00000000062F6000-memory.dmp

    Filesize

    408KB

  • memory/4180-151-0x0000000006880000-0x000000000689E000-memory.dmp

    Filesize

    120KB

  • memory/4180-152-0x0000000007940000-0x00000000079D6000-memory.dmp

    Filesize

    600KB

  • memory/4180-153-0x0000000006D80000-0x0000000006D9A000-memory.dmp

    Filesize

    104KB

  • memory/4180-154-0x0000000006DF0000-0x0000000006E12000-memory.dmp

    Filesize

    136KB

  • memory/4180-155-0x0000000007F90000-0x0000000008534000-memory.dmp

    Filesize

    5.6MB

  • memory/4180-143-0x0000000000000000-mapping.dmp

  • memory/4180-157-0x0000000008BC0000-0x000000000923A000-memory.dmp

    Filesize

    6.5MB

  • memory/4180-146-0x00000000052E0000-0x0000000005316000-memory.dmp

    Filesize

    216KB

  • memory/4484-142-0x0000000073050000-0x0000000073601000-memory.dmp

    Filesize

    5.7MB

  • memory/4484-161-0x0000000073050000-0x0000000073601000-memory.dmp

    Filesize

    5.7MB

  • memory/4484-135-0x0000000000000000-mapping.dmp

  • memory/4536-145-0x00007FF9ABE20000-0x00007FF9AC8E1000-memory.dmp

    Filesize

    10.8MB

  • memory/4536-156-0x00007FF9ABE20000-0x00007FF9AC8E1000-memory.dmp

    Filesize

    10.8MB

  • memory/4536-141-0x0000000000E40000-0x0000000000E86000-memory.dmp

    Filesize

    280KB

  • memory/4536-138-0x0000000000000000-mapping.dmp