Analysis

  • max time kernel
    151s
  • max time network
    165s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    03-12-2022 02:21

General

  • Target

    fff04b5cd9e1a52c1f5c7c99367f7bd9b3a7d681740f4e53bb353879d598ca0d.exe

  • Size

    2.6MB

  • MD5

    10c0e1e14e177d1486d99c3a91d84969

  • SHA1

    c0b90a929ff7a8c1c14ee554f2cc55a39605217e

  • SHA256

    fff04b5cd9e1a52c1f5c7c99367f7bd9b3a7d681740f4e53bb353879d598ca0d

  • SHA512

    2d83e9fd63d40c2ee020c63878e2c5e421944a458f516741cfefa539de3649f59e3c64dfeab3496dd8c291a4f9756cc37cc3fe5f59d2e861e5a8553f417d3237

  • SSDEEP

    49152:Txjs/ylV/q8f7NHOiCR577tOReeel4+GnBdJFEwks51SjaU7/fMP0:TxcylVyABa5PgdFZnBtE+10

Malware Config

Extracted

Family

darkcomet

Botnet

±ö¿Í16

C2

heiseyinmou.gnway.net:2012

Mutex

DC_MUTEX-F4ZWV0U

Attributes
  • InstallPath

    MSDCSC\msdcsc.exe

  • gencode

    czMVsH3hot1Q

  • install

    true

  • offline_keylogger

    true

  • persistence

    true

  • reg_key

    ΢�͸���

Signatures

  • Darkcomet

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Identifies Wine through registry keys 2 TTPs 2 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Loads dropped DLL 6 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 46 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 63 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fff04b5cd9e1a52c1f5c7c99367f7bd9b3a7d681740f4e53bb353879d598ca0d.exe
    "C:\Users\Admin\AppData\Local\Temp\fff04b5cd9e1a52c1f5c7c99367f7bd9b3a7d681740f4e53bb353879d598ca0d.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.vbs"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:944
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c maqi1.exe
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1568
        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\maqi1.exe
          maqi1.exe
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetWindowsHookEx
          PID:1168
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c okko1.exe
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1500
        • C:\Users\Admin\AppData\Local\Temp\RarSFX0\okko1.exe
          okko1.exe
          4⤵
          • Modifies WinLogon for persistence
          • Executes dropped EXE
          • Identifies Wine through registry keys
          • Loads dropped DLL
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Writes to the Master Boot Record (MBR)
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:692
          • C:\Windows\SysWOW64\notepad.exe
            notepad
            5⤵
              PID:1676
            • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
              "C:\Users\Admin\Documents\MSDCSC\msdcsc.exe"
              5⤵
              • Executes dropped EXE
              • Identifies Wine through registry keys
              • Adds Run key to start application
              • Checks whether UAC is enabled
              • Writes to the Master Boot Record (MBR)
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              PID:1288

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Winlogon Helper DLL

    1
    T1004

    Registry Run Keys / Startup Folder

    1
    T1060

    Bootkit

    1
    T1067

    Defense Evasion

    Modify Registry

    2
    T1112

    Virtualization/Sandbox Evasion

    1
    T1497

    Discovery

    Query Registry

    1
    T1012

    Virtualization/Sandbox Evasion

    1
    T1497

    System Information Discovery

    2
    T1082

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\1.vbs
      Filesize

      106B

      MD5

      e747a0e254ab7f22c2b8ee54df6e5bb8

      SHA1

      92a5caa16fd59ddebdf587ba4a63ac51803180a6

      SHA256

      27748d903993b59f21a8d6ed85a0c20be4a5eabb87812c084a72354386146cd3

      SHA512

      a9e2759db18734c0ef1dadee1fa98d459f6efbdf37197f3df76671e22da11440062dc06108529d6c7272f9a875c51b1a78c635a72c3c87ebca3940ce763d8fbc

    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\maqi1.exe
      Filesize

      20KB

      MD5

      5eff78e5cca75e6c30fc246d788a6ab2

      SHA1

      8b09f99a3304afa60ef0559efbc94162de09ca39

      SHA256

      01960035d76685f023298fd55d5ff2da022ca531673e517eed5c28bb7f8e4e33

      SHA512

      ce6b16cbe6f4633f0f19c1de496f8a67e47dfb7db7e4dd4b3bb6c36ae8908b34c4ffd6a3e2552ef634ab9f296b2075c476cff257f72692cb9bd0458bc41c8d37

    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\maqi1.exe
      Filesize

      20KB

      MD5

      5eff78e5cca75e6c30fc246d788a6ab2

      SHA1

      8b09f99a3304afa60ef0559efbc94162de09ca39

      SHA256

      01960035d76685f023298fd55d5ff2da022ca531673e517eed5c28bb7f8e4e33

      SHA512

      ce6b16cbe6f4633f0f19c1de496f8a67e47dfb7db7e4dd4b3bb6c36ae8908b34c4ffd6a3e2552ef634ab9f296b2075c476cff257f72692cb9bd0458bc41c8d37

    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\okko1.exe
      Filesize

      2.6MB

      MD5

      31cf3cc235759304d54b64e35356baa0

      SHA1

      ea2d45d27e152341d0b9a4a3302f93b71ac9234d

      SHA256

      a277106c79599bf4fea2a16a04ee9836ce032b1a2b919a75591b3bb8dd84dc27

      SHA512

      da13df4f95585d73db363d7978bf836178a483781ade674b7b21b01cc2dcfd591fff7a10002a9fb1057945816f835076bd66c5a7a1afff4a4a724fa7749641c4

    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\okko1.exe
      Filesize

      2.6MB

      MD5

      31cf3cc235759304d54b64e35356baa0

      SHA1

      ea2d45d27e152341d0b9a4a3302f93b71ac9234d

      SHA256

      a277106c79599bf4fea2a16a04ee9836ce032b1a2b919a75591b3bb8dd84dc27

      SHA512

      da13df4f95585d73db363d7978bf836178a483781ade674b7b21b01cc2dcfd591fff7a10002a9fb1057945816f835076bd66c5a7a1afff4a4a724fa7749641c4

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      2.6MB

      MD5

      31cf3cc235759304d54b64e35356baa0

      SHA1

      ea2d45d27e152341d0b9a4a3302f93b71ac9234d

      SHA256

      a277106c79599bf4fea2a16a04ee9836ce032b1a2b919a75591b3bb8dd84dc27

      SHA512

      da13df4f95585d73db363d7978bf836178a483781ade674b7b21b01cc2dcfd591fff7a10002a9fb1057945816f835076bd66c5a7a1afff4a4a724fa7749641c4

    • C:\Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      2.6MB

      MD5

      31cf3cc235759304d54b64e35356baa0

      SHA1

      ea2d45d27e152341d0b9a4a3302f93b71ac9234d

      SHA256

      a277106c79599bf4fea2a16a04ee9836ce032b1a2b919a75591b3bb8dd84dc27

      SHA512

      da13df4f95585d73db363d7978bf836178a483781ade674b7b21b01cc2dcfd591fff7a10002a9fb1057945816f835076bd66c5a7a1afff4a4a724fa7749641c4

    • \Users\Admin\AppData\Local\Temp\RarSFX0\maqi1.exe
      Filesize

      20KB

      MD5

      5eff78e5cca75e6c30fc246d788a6ab2

      SHA1

      8b09f99a3304afa60ef0559efbc94162de09ca39

      SHA256

      01960035d76685f023298fd55d5ff2da022ca531673e517eed5c28bb7f8e4e33

      SHA512

      ce6b16cbe6f4633f0f19c1de496f8a67e47dfb7db7e4dd4b3bb6c36ae8908b34c4ffd6a3e2552ef634ab9f296b2075c476cff257f72692cb9bd0458bc41c8d37

    • \Users\Admin\AppData\Local\Temp\RarSFX0\maqi1.exe
      Filesize

      20KB

      MD5

      5eff78e5cca75e6c30fc246d788a6ab2

      SHA1

      8b09f99a3304afa60ef0559efbc94162de09ca39

      SHA256

      01960035d76685f023298fd55d5ff2da022ca531673e517eed5c28bb7f8e4e33

      SHA512

      ce6b16cbe6f4633f0f19c1de496f8a67e47dfb7db7e4dd4b3bb6c36ae8908b34c4ffd6a3e2552ef634ab9f296b2075c476cff257f72692cb9bd0458bc41c8d37

    • \Users\Admin\AppData\Local\Temp\RarSFX0\okko1.exe
      Filesize

      2.6MB

      MD5

      31cf3cc235759304d54b64e35356baa0

      SHA1

      ea2d45d27e152341d0b9a4a3302f93b71ac9234d

      SHA256

      a277106c79599bf4fea2a16a04ee9836ce032b1a2b919a75591b3bb8dd84dc27

      SHA512

      da13df4f95585d73db363d7978bf836178a483781ade674b7b21b01cc2dcfd591fff7a10002a9fb1057945816f835076bd66c5a7a1afff4a4a724fa7749641c4

    • \Users\Admin\AppData\Local\Temp\RarSFX0\okko1.exe
      Filesize

      2.6MB

      MD5

      31cf3cc235759304d54b64e35356baa0

      SHA1

      ea2d45d27e152341d0b9a4a3302f93b71ac9234d

      SHA256

      a277106c79599bf4fea2a16a04ee9836ce032b1a2b919a75591b3bb8dd84dc27

      SHA512

      da13df4f95585d73db363d7978bf836178a483781ade674b7b21b01cc2dcfd591fff7a10002a9fb1057945816f835076bd66c5a7a1afff4a4a724fa7749641c4

    • \Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      2.6MB

      MD5

      31cf3cc235759304d54b64e35356baa0

      SHA1

      ea2d45d27e152341d0b9a4a3302f93b71ac9234d

      SHA256

      a277106c79599bf4fea2a16a04ee9836ce032b1a2b919a75591b3bb8dd84dc27

      SHA512

      da13df4f95585d73db363d7978bf836178a483781ade674b7b21b01cc2dcfd591fff7a10002a9fb1057945816f835076bd66c5a7a1afff4a4a724fa7749641c4

    • \Users\Admin\Documents\MSDCSC\msdcsc.exe
      Filesize

      2.6MB

      MD5

      31cf3cc235759304d54b64e35356baa0

      SHA1

      ea2d45d27e152341d0b9a4a3302f93b71ac9234d

      SHA256

      a277106c79599bf4fea2a16a04ee9836ce032b1a2b919a75591b3bb8dd84dc27

      SHA512

      da13df4f95585d73db363d7978bf836178a483781ade674b7b21b01cc2dcfd591fff7a10002a9fb1057945816f835076bd66c5a7a1afff4a4a724fa7749641c4

    • memory/692-71-0x0000000000000000-mapping.dmp
    • memory/692-84-0x0000000007AB0000-0x000000000801E000-memory.dmp
      Filesize

      5.4MB

    • memory/692-75-0x0000000000400000-0x000000000096E000-memory.dmp
      Filesize

      5.4MB

    • memory/692-86-0x0000000000400000-0x000000000096E000-memory.dmp
      Filesize

      5.4MB

    • memory/692-78-0x0000000000400000-0x000000000096E000-memory.dmp
      Filesize

      5.4MB

    • memory/944-55-0x0000000000000000-mapping.dmp
    • memory/1168-64-0x0000000000000000-mapping.dmp
    • memory/1288-87-0x0000000000400000-0x000000000096E000-memory.dmp
      Filesize

      5.4MB

    • memory/1288-81-0x0000000000000000-mapping.dmp
    • memory/1288-85-0x0000000000400000-0x000000000096E000-memory.dmp
      Filesize

      5.4MB

    • memory/1288-89-0x0000000000400000-0x000000000096E000-memory.dmp
      Filesize

      5.4MB

    • memory/1288-90-0x0000000000400000-0x000000000096E000-memory.dmp
      Filesize

      5.4MB

    • memory/1500-60-0x0000000000000000-mapping.dmp
    • memory/1500-74-0x0000000002180000-0x00000000026EE000-memory.dmp
      Filesize

      5.4MB

    • memory/1568-58-0x0000000000000000-mapping.dmp
    • memory/1676-76-0x0000000000000000-mapping.dmp
    • memory/1960-54-0x0000000075A11000-0x0000000075A13000-memory.dmp
      Filesize

      8KB