Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    23-03-2023 01:00

General

  • Target

    3041f94ecddb3116d07dc174c4297b43d022b48282df8acc25dfac2ffc5b0755.exe

  • Size

    2.4MB

  • MD5

    0e444044fdfea512ca18fc3396abb65b

  • SHA1

    8b601ccad5b2a76967c0ca7579dc13d092307f34

  • SHA256

    3041f94ecddb3116d07dc174c4297b43d022b48282df8acc25dfac2ffc5b0755

  • SHA512

    7b58b88c7fbcd7b97d1a08f2145794beefa2960382140bac74f1f4fe630cdd0314cd9bceb599a32c56788df1e0e9dccf84c1598c52f9c581389327428696e119

  • SSDEEP

    49152:bkcwlRFUh2b69Cs9MR3uh+tytRY1aLXYqIiiJd2EHt:bkdlRI3ceI1azYqWj

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Process spawned unexpected child process 18 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • UAC bypass 3 TTPs 6 IoCs
  • DCRat payload 6 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

  • Executes dropped EXE 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Drops file in Program Files directory 9 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 18 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs
  • System policy modification 1 TTPs 6 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\3041f94ecddb3116d07dc174c4297b43d022b48282df8acc25dfac2ffc5b0755.exe
    "C:\Users\Admin\AppData\Local\Temp\3041f94ecddb3116d07dc174c4297b43d022b48282df8acc25dfac2ffc5b0755.exe"
    1⤵
    • UAC bypass
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1160
    • C:\Program Files (x86)\Windows Portable Devices\sppsvc.exe
      "C:\Program Files (x86)\Windows Portable Devices\sppsvc.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:1596
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Portable Devices\sppsvc.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:864
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1388
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "sppsvcs" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Windows Portable Devices\sppsvc.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1648
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 11 /tr "'C:\Windows\en-US\csrss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1536
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\en-US\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1992
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "csrssc" /sc MINUTE /mo 6 /tr "'C:\Windows\en-US\csrss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1876
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Media Player\it-IT\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1432
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Media Player\it-IT\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1400
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Media Player\it-IT\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1952
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Uninstall Information\spoolsv.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1892
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Program Files (x86)\Uninstall Information\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:824
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "spoolsvs" /sc MINUTE /mo 12 /tr "'C:\Program Files (x86)\Uninstall Information\spoolsv.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:328
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 13 /tr "'C:\Windows\AppPatch\AppPatch64\smss.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1612
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\AppPatch\AppPatch64\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1532
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "smsss" /sc MINUTE /mo 5 /tr "'C:\Windows\AppPatch\AppPatch64\smss.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:984
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 8 /tr "'C:\Program Files (x86)\Windows Defender\en-US\lsm.exe'" /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:2036
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Defender\en-US\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1872
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "lsml" /sc MINUTE /mo 14 /tr "'C:\Program Files (x86)\Windows Defender\en-US\lsm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Creates scheduled task(s)
    PID:1920

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Bypass User Account Control

1
T1088

Scheduled Task

1
T1053

Defense Evasion

Bypass User Account Control

1
T1088

Disabling Security Tools

1
T1089

Modify Registry

2
T1112

Discovery

System Information Discovery

2
T1082

Query Registry

1
T1012

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Program Files (x86)\Windows Portable Devices\sppsvc.exe
    Filesize

    2.4MB

    MD5

    0e444044fdfea512ca18fc3396abb65b

    SHA1

    8b601ccad5b2a76967c0ca7579dc13d092307f34

    SHA256

    3041f94ecddb3116d07dc174c4297b43d022b48282df8acc25dfac2ffc5b0755

    SHA512

    7b58b88c7fbcd7b97d1a08f2145794beefa2960382140bac74f1f4fe630cdd0314cd9bceb599a32c56788df1e0e9dccf84c1598c52f9c581389327428696e119

  • C:\Program Files (x86)\Windows Portable Devices\sppsvc.exe
    Filesize

    2.4MB

    MD5

    0e444044fdfea512ca18fc3396abb65b

    SHA1

    8b601ccad5b2a76967c0ca7579dc13d092307f34

    SHA256

    3041f94ecddb3116d07dc174c4297b43d022b48282df8acc25dfac2ffc5b0755

    SHA512

    7b58b88c7fbcd7b97d1a08f2145794beefa2960382140bac74f1f4fe630cdd0314cd9bceb599a32c56788df1e0e9dccf84c1598c52f9c581389327428696e119

  • C:\Windows\AppPatch\AppPatch64\smss.exe
    Filesize

    2.4MB

    MD5

    0e444044fdfea512ca18fc3396abb65b

    SHA1

    8b601ccad5b2a76967c0ca7579dc13d092307f34

    SHA256

    3041f94ecddb3116d07dc174c4297b43d022b48282df8acc25dfac2ffc5b0755

    SHA512

    7b58b88c7fbcd7b97d1a08f2145794beefa2960382140bac74f1f4fe630cdd0314cd9bceb599a32c56788df1e0e9dccf84c1598c52f9c581389327428696e119

  • memory/1160-58-0x0000000000330000-0x0000000000346000-memory.dmp
    Filesize

    88KB

  • memory/1160-64-0x00000000006F0000-0x00000000006FE000-memory.dmp
    Filesize

    56KB

  • memory/1160-59-0x0000000000350000-0x000000000035A000-memory.dmp
    Filesize

    40KB

  • memory/1160-60-0x00000000006A0000-0x00000000006F6000-memory.dmp
    Filesize

    344KB

  • memory/1160-61-0x00000000004E0000-0x00000000004EC000-memory.dmp
    Filesize

    48KB

  • memory/1160-62-0x00000000004F0000-0x00000000004FC000-memory.dmp
    Filesize

    48KB

  • memory/1160-63-0x0000000000500000-0x000000000050C000-memory.dmp
    Filesize

    48KB

  • memory/1160-54-0x0000000001390000-0x0000000001608000-memory.dmp
    Filesize

    2.5MB

  • memory/1160-65-0x0000000000510000-0x0000000000518000-memory.dmp
    Filesize

    32KB

  • memory/1160-57-0x0000000000310000-0x000000000032C000-memory.dmp
    Filesize

    112KB

  • memory/1160-56-0x0000000000300000-0x000000000030E000-memory.dmp
    Filesize

    56KB

  • memory/1160-55-0x000000001B150000-0x000000001B1D0000-memory.dmp
    Filesize

    512KB

  • memory/1596-84-0x00000000013E0000-0x0000000001658000-memory.dmp
    Filesize

    2.5MB

  • memory/1596-85-0x000000001B070000-0x000000001B0F0000-memory.dmp
    Filesize

    512KB

  • memory/1596-86-0x000000001B070000-0x000000001B0F0000-memory.dmp
    Filesize

    512KB