Overview

overview

10

Static

static

10

73eaa27083...15.exe

windows7-x64

10

73eaa27083...15.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    102s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-12-2024 18:08

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General

  • Target

    73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe

  • Size

    952KB

  • MD5

    dc100730c11f4a70e5324f4a0a0358f2

  • SHA1

    561a80a6284540fe9f3c30a2495f51c9e1077ab0

  • SHA256

    73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15

  • SHA512

    d8f497520b432fa8ebd07d39a8b922b38f1dc9a954ad9646ec46c456e4476a1e856826497a23525a33690ce464796c65db9714a86e9d6af922aecc8ee85772e6

  • SSDEEP

    24576:e+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXXn:Z8/KfRTKN

Score
10/10
dcratevasioninfostealerpersistencerattrojan

Malware Config

Signatures

  • DcRat

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

    ratinfostealerdcrat
  • Dcrat family
    dcrat
  • Modifies WinLogon for persistence 2 TTPs 8 IoCs
    persistence
  • Process spawned unexpected child process 8 IoCs

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

  • UAC bypass 3 TTPs 6 IoCs
    evasiontrojan
  • DCRat payload 7 IoCs

    Detects payload of DCRat, commonly dropped by NSIS installers.

    rat
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 16 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
    evasiontrojan
  • Drops file in System32 directory 10 IoCs
  • Drops file in Program Files directory 5 IoCs
  • Drops file in Windows directory 10 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 8 IoCs

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

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • System policy modification 1 TTPs 6 IoCs
    evasion
  • 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe
    "C:\Users\Admin\AppData\Local\Temp\73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • 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:748
    • C:\Program Files\7-Zip\Lang\Registry.exe
      "C:\Program Files\7-Zip\Lang\Registry.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:4236
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15" /sc ONLOGON /tr "'C:\Recovery\WindowsRE\73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1684
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "Registry" /sc ONLOGON /tr "'C:\Program Files\7-Zip\Lang\Registry.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2936
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartUI\StartMenuExperienceHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2008
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\MDMSettingsProv\unsecapp.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1892
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Windows\Resources\Themes\aero\ja-JP\TextInputHost.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:2384
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Windows\System32\lmhsvc\dwm.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1716
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Users\Public\OfficeClickToRun.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:532
  • C:\Windows\system32\schtasks.exe
    schtasks.exe /create /tn "73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\dd_vcredistUI3C4E\73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe'" /rl HIGHEST /f
    1⤵
    • Process spawned unexpected child process
    • Scheduled Task/Job: Scheduled Task
    PID:1052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

4
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

  • C:\Recovery\WindowsRE\73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe
    Filesize

    952KB

    MD5

    59f94ce093619fb3c14143b4dc23c0c8

    SHA1

    0de8dd8e76c5bd9670f513a0eaf68cbd576004be

    SHA256

    8f50f214eb501d3da751640367df3daddcf964d669dcadccfb14c410dc7413d9

    SHA512

    c7d5c49e824e003937b07724834ce89e6670a90bb7ae8ebb01e6756f4095636e89ed1eb1b8bc750367182e4413a383438e774c5511744a97d592652d2f4dfde2

    Download Submit

  • C:\Users\Public\OfficeClickToRun.exe
    Filesize

    952KB

    MD5

    9ef0393f71c60dedb384a61ae48a7706

    SHA1

    fce97cbfe01159e42427f4826b5d2d573feb3c78

    SHA256

    2b4b74840738e3e902718bbb41a5ce6eac3b73e4b599035a31a394b11ce23971

    SHA512

    ab7e32120b76d7eb865886e63f13266bb94be59b1745963c598721887d5fc08617aae607c4a66df217656576ea875a27abdafee652f3aecb6d31b9a0a9613718

    Download Submit

  • C:\Windows\Resources\Themes\aero\ja-JP\TextInputHost.exe
    Filesize

    952KB

    MD5

    dc100730c11f4a70e5324f4a0a0358f2

    SHA1

    561a80a6284540fe9f3c30a2495f51c9e1077ab0

    SHA256

    73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15

    SHA512

    d8f497520b432fa8ebd07d39a8b922b38f1dc9a954ad9646ec46c456e4476a1e856826497a23525a33690ce464796c65db9714a86e9d6af922aecc8ee85772e6

    Download Submit

  • C:\Windows\Resources\Themes\aero\ja-JP\TextInputHost.exe
    Filesize

    952KB

    MD5

    95e8419234760a401876467b34ed5e64

    SHA1

    25e088a24b6444e73018b5889cca54d7bdf3b21a

    SHA256

    604f3f6fb643846517d4da19a70f529c795f7334734747508436c2e445d642b8

    SHA512

    3a713be09c96c7d78884dd90ade8dc2a896185ae1c5365562ac27cd92d0e8e7aea46faa507e072d08c9e5d07122acaf5a69940ae1f819ede14d78a2d4554e7a9

    Download Submit

  • C:\Windows\System32\lmhsvc\dwm.exe
    Filesize

    952KB

    MD5

    e1fe1a98f2b026350e2d3d073764b35f

    SHA1

    fd7a803eb40c71f08cff3c70e6dcdaca706f9225

    SHA256

    8a880f92c36280ed66c3b7471e5cafbad36750c237cea6401e7f6dffae3f1189

    SHA512

    2dbd92dd5a732714e6cb8734e8f2e1202c8b6d150ab09971a2fde26eeb1bad408eba56797096f7874241fbb13a67260c184e69db4bd76b808814ad217a90a54a

    Download Submit

  • C:\Windows\System32\wbem\MDMSettingsProv\unsecapp.exe
    Filesize

    952KB

    MD5

    49d74c2f4d97ee0b329359cdfab4e5ec

    SHA1

    ba05dd4e8272de5858310edece887240b920a87e

    SHA256

    55215b50237e8caa5419fb5aa8fccd44017b65d261a5425346a0c11fec6b1eea

    SHA512

    537f14b06324c681b4d600003b7c883a2d978c5423d76cbfd8743bce71fcd82c9ea827747c497f11f47fe0529fe12d76b6031717b417c75cee5f6059fceaa1ab

    Download Submit

  • memory/748-4-0x0000000000EE0000-0x0000000000EF0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/748-7-0x0000000002800000-0x000000000280A000-memory.dmp

    Filesize

    40KB

    Download

  • memory/748-8-0x0000000000F20000-0x0000000000F28000-memory.dmp

    Filesize

    32KB

    Download

  • memory/748-9-0x0000000002810000-0x000000000281A000-memory.dmp

    Filesize

    40KB

    Download

  • memory/748-10-0x000000001B100000-0x000000001B10C000-memory.dmp

    Filesize

    48KB

    Download

  • memory/748-11-0x000000001B130000-0x000000001B13C000-memory.dmp

    Filesize

    48KB

    Download

  • memory/748-5-0x0000000000EF0000-0x0000000000EFA000-memory.dmp

    Filesize

    40KB

    Download

  • memory/748-6-0x00000000027F0000-0x00000000027FC000-memory.dmp

    Filesize

    48KB

    Download

  • memory/748-0-0x00007FFE43D43000-0x00007FFE43D45000-memory.dmp

    Filesize

    8KB

    Download

  • memory/748-3-0x0000000000CC0000-0x0000000000CD0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/748-2-0x00007FFE43D40000-0x00007FFE44801000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/748-1-0x0000000000530000-0x0000000000624000-memory.dmp

    Filesize

    976KB

    Download

  • memory/748-136-0x00007FFE43D40000-0x00007FFE44801000-memory.dmp

    Filesize

    10.8MB

    Download