Analysis

  • max time kernel
    60s
  • max time network
    60s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/04/2025, 19:21

General

  • Target

    file5.exe

  • Size

    648KB

  • MD5

    38836c26314605862f3ca3bfe0936b46

  • SHA1

    b68d2a35b2d9f5083e3b2574ec409c6dbb615fd1

  • SHA256

    3e151c518a16e949c618995aa6e38f509ff95f4fcc0f2a84a13a64f310e34e1b

  • SHA512

    dc0aecfe210fd1169eea3118ca09de6dcb4e53ad6a7aee25580df1b82b224fa551a4c961756fbf0a415ab77aec2a26867cfd16fe0358bb1024da80b9e7bdc67e

  • SSDEEP

    12288:k4u+fpcW7KEZlPzCy37N282g0LV6Btpmkkx6g2:k1+TKiRzC0NqgGApfkxI

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

jvjv2044duck33.duckdns.org:8808

Mutex

0fC8zJGwBBNm

Attributes
  • delay

    3

  • install

    true

  • install_file

    csrss.exe

  • install_folder

    %AppData%

aes.plain

Extracted

Family

darkcomet

Botnet

Guest16

C2

jvjv2044duck33.duckdns.org:1604

Mutex

DC_MUTEX-CK7UE3N

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    Jp74nsvbhc4i

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    MicroUpdate

rc4.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • Darkcomet

    DarkComet is a remote access trojan (RAT) developed by Jean-Pierre Lesueur.

  • Darkcomet family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

  • Nanocore family
  • Async RAT payload 1 IoCs
  • Disables Task Manager via registry modification
  • Sets file to hidden 1 TTPs 2 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 13 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • UPX packed file 15 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Drops file in Program Files directory 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 24 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Modifies registry class 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Views/modifies file attributes 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file5.exe
    "C:\Users\Admin\AppData\Local\Temp\file5.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1236
    • C:\Program Files (x86)\ULTIME MULTIHACK REBORN.EXE
      "C:\Program Files (x86)\ULTIME MULTIHACK REBORN.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:2500
    • C:\Program Files (x86)\VLC1.EXE
      "C:\Program Files (x86)\VLC1.EXE"
      2⤵
      • Modifies WinLogon for persistence
      • Checks computer location settings
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:816
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Program Files (x86)\VLC1.EXE" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4364
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Program Files (x86)\VLC1.EXE" +s +h
          4⤵
          • Sets file to hidden
          • Drops file in Program Files directory
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:3544
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k attrib "C:\Program Files (x86)" +s +h
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:4456
        • C:\Windows\SysWOW64\attrib.exe
          attrib "C:\Program Files (x86)" +s +h
          4⤵
          • Sets file to hidden
          • System Location Discovery: System Language Discovery
          • Views/modifies file attributes
          PID:4636
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • System Location Discovery: System Language Discovery
        PID:5076
      • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:3748
    • C:\Program Files (x86)\WINDOWS DEFENDER.EXE
      "C:\Program Files (x86)\WINDOWS DEFENDER.EXE"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:900
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "csrss" /tr '"C:\Users\Admin\AppData\Roaming\csrss.exe"' & exit
        3⤵
        • System Location Discovery: System Language Discovery
        PID:3768
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "csrss" /tr '"C:\Users\Admin\AppData\Roaming\csrss.exe"'
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:4844
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA009.tmp.bat""
        3⤵
        • System Location Discovery: System Language Discovery
        PID:5004
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • System Location Discovery: System Language Discovery
          • Delays execution with timeout.exe
          PID:2452
        • C:\Users\Admin\AppData\Roaming\csrss.exe
          "C:\Users\Admin\AppData\Roaming\csrss.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:3028
    • C:\Program Files (x86)\WINDOWS SECURITY NANO.EXE
      "C:\Program Files (x86)\WINDOWS SECURITY NANO.EXE"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:3956
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1368
    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3528
      • C:\Windows\SysWOW64\notepad.exe
        notepad
        3⤵
        • System Location Discovery: System Language Discovery
        PID:2880
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Program Files (x86)\ARP Service\arpsv.exe
    1⤵
      PID:2280
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      1⤵
        PID:4632
        • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          2⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:2312
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
        1⤵
          PID:2764
          • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            2⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            PID:1520
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
          1⤵
            PID:3544
            • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
              C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
              2⤵
              • Executes dropped EXE
              • System Location Discovery: System Language Discovery
              PID:3620
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
            1⤵
              PID:2824
              • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
                C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
                2⤵
                • Executes dropped EXE
                • System Location Discovery: System Language Discovery
                PID:244
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
              1⤵
                PID:3548
                • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
                  C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
                  2⤵
                  • Executes dropped EXE
                  • System Location Discovery: System Language Discovery
                  PID:1456
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
                1⤵
                  PID:4616
                  • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
                    C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
                    2⤵
                    • Executes dropped EXE
                    • System Location Discovery: System Language Discovery
                    PID:3600

                Network

                MITRE ATT&CK Enterprise v16

                Replay Monitor

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                Downloads

                • C:\Program Files (x86)\ULTIME MULTIHACK REBORN.EXE

                  Filesize

                  86KB

                  MD5

                  0739a4b039910c9ecc48661e25279e6e

                  SHA1

                  02bf3b0265850bc13e85ac9bb421b88b6babbcaf

                  SHA256

                  9df65940d3f2230b276e9ee989f15a94855e07cf2aa04210353f7a9e9a62db4a

                  SHA512

                  e8a8876f4cfc2657e2b355b288fb8386e40131aeacc18aba1036ea5e60cf9a571f8da4ead987751db16fba5054d50b3dac9c399e5dff38fc64bf22c4fb3cb92f

                • C:\Program Files (x86)\VLC1.EXE

                  Filesize

                  251KB

                  MD5

                  3a0071fc42e1305afa1bc5d3d8233068

                  SHA1

                  711402cabd474d742d31509f17b26493683d61d3

                  SHA256

                  d41679ada9aabdfd4a55f25a5721d6a5dfbdee53afcf0d1cf319276e28941afa

                  SHA512

                  1a0b0bd341fe097f924517e8848d4012a93286402d79cdd67cf2cfc3225bd3785f81d329348ae1e0afc308ea98790dc89872f41cf3e9843a9481512832a403d8

                • C:\Program Files (x86)\WINDOWS DEFENDER.EXE

                  Filesize

                  47KB

                  MD5

                  96da127f30d555f809b5a781eeadb5d4

                  SHA1

                  6742daf92406b52d5b98fcf3c8b96aca2f691404

                  SHA256

                  f2e3e68a10f9f07b031e2fd3d7d73553ee4639a5e1c2a0775ac0a2ddbeff5e53

                  SHA512

                  2c7f2d0bfb65e532f1c1068a93f92c2cd17682de70d8ee84cab47d3b3e80f87d97d16e0d41dee027f3381e5abe9d19f8b2604da7769d36243695be1d79b3be52

                • C:\Program Files (x86)\WINDOWS SECURITY NANO.EXE

                  Filesize

                  209KB

                  MD5

                  172214b69dfbf053c83ff8e6b70842bc

                  SHA1

                  02e321757925f21b18c96d2e23d6e9a755df59ab

                  SHA256

                  da01598ba05a9467fa7cf76d9d212df75886eeeea30a633654dcdf29d8be90d9

                  SHA512

                  6b02e7dffd64a8cc7b83e7dcbfbd8d4dfb99f7cc13d5056ffb00efb51f7cf0431bb270b8afa394dbeb4e7b3558261c0ea6bd3a542bd82afd9fbc9c5227f83a42

                • C:\Users\Admin\AppData\Local\Temp\tmpA009.tmp.bat

                  Filesize

                  149B

                  MD5

                  65cc023f4edbf457c4a6be95fde9829b

                  SHA1

                  b3682b01d24984c2b8fbc0a0603b44495ef8a9da

                  SHA256

                  c3703c096900e7094c97be7f3da82941546068a5f1640a5e514f1e074a2f3613

                  SHA512

                  2a143c8062bf0e25f1570eef986819e6b543ea5c50e4f33e959555fa456ec6368862bc06266fb84ec21c6d94b339fda3c38bd3d2ced3db619e2308f50c84dce8

                • memory/244-144-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/244-142-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/816-25-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/816-119-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/900-41-0x0000000000340000-0x0000000000352000-memory.dmp

                  Filesize

                  72KB

                • memory/900-44-0x0000000073FE0000-0x0000000074790000-memory.dmp

                  Filesize

                  7.7MB

                • memory/900-125-0x0000000073FE0000-0x0000000074790000-memory.dmp

                  Filesize

                  7.7MB

                • memory/1456-148-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/1520-135-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/2312-113-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/2312-117-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/2500-45-0x0000000000E60000-0x0000000000E7C000-memory.dmp

                  Filesize

                  112KB

                • memory/2500-50-0x0000000005DE0000-0x0000000006384000-memory.dmp

                  Filesize

                  5.6MB

                • memory/2500-102-0x00000000058D0000-0x0000000005926000-memory.dmp

                  Filesize

                  344KB

                • memory/2500-39-0x0000000073FEE000-0x0000000073FEF000-memory.dmp

                  Filesize

                  4KB

                • memory/2500-101-0x00000000056D0000-0x00000000056DA000-memory.dmp

                  Filesize

                  40KB

                • memory/2500-46-0x0000000005790000-0x000000000582C000-memory.dmp

                  Filesize

                  624KB

                • memory/2500-51-0x0000000005830000-0x00000000058C2000-memory.dmp

                  Filesize

                  584KB

                • memory/2500-127-0x0000000073FEE000-0x0000000073FEF000-memory.dmp

                  Filesize

                  4KB

                • memory/2880-109-0x0000000000CD0000-0x0000000000CD1000-memory.dmp

                  Filesize

                  4KB

                • memory/3528-107-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/3528-132-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/3600-152-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/3620-139-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/3748-115-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/3748-112-0x0000000000400000-0x00000000004B7000-memory.dmp

                  Filesize

                  732KB

                • memory/3956-131-0x00000000015F0000-0x0000000001600000-memory.dmp

                  Filesize

                  64KB

                • memory/3956-47-0x00000000015F0000-0x0000000001600000-memory.dmp

                  Filesize

                  64KB

                • memory/5076-52-0x0000000000CF0000-0x0000000000CF1000-memory.dmp

                  Filesize

                  4KB