Analysis
- max time kernel
93s - max time network
95s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
07/01/2025, 04:31
General
- Target JaffaCakes118_4dba0b8b53a6226666269bcda873575f.exe
- Size 1.4MB
- Sample250107-e5j57atrf1
- SHA256 94ce5a41f89b1be0c2b093849cebc9d4da540feeff64daceaa6439f0b4b573eb
Malware Config
Signatures
- DcRat 6 IoCs
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
- Dcrat family
- Process spawned unexpected child process 5 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
- DCRat payload 2 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
- Disables Task Manager via registry modification
- Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Adds Run key to start application 2 TTPs 5 IoCs
- Drops file in System32 directory 2 IoCs
- Drops file in Windows directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies registry class 1 IoCs
- Modifies registry key 1 TTPs 1 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 5 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 7 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 13 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
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C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4dba0b8b53a6226666269bcda873575f.exe"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4dba0b8b53a6226666269bcda873575f.exe"1⤵
- DcRat
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\SessionHostmonitorNet\JEDcOjKcz5t.vbe"2⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\SessionHostmonitorNet\vkBwAxiibpq4vERKhn6zEWt.bat" "3⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\SessionHostmonitorNet\SessionHostmonitorNetsavesHost.exe"C:\Users\Admin\AppData\Local\Temp\SessionHostmonitorNet\SessionHostmonitorNetsavesHost.exe"4⤵
- Checks computer location settings
- Executes dropped EXE
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\AppointmentActivation\SppExtComObj.exe"C:\Windows\System32\AppointmentActivation\SppExtComObj.exe"5⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\reg.exereg add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 1 /f4⤵
- System Location Discovery: System Language Discovery
- Modifies registry key
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\Users\Public\Documents\winlogon.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "TextInputHost" /sc ONLOGON /tr "'C:\Users\All Users\Oracle\Java\.oracle_jre_usage\TextInputHost.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\ProgramData\ssh\OfficeClickToRun.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "SppExtComObj" /sc ONLOGON /tr "'C:\Windows\System32\AppointmentActivation\SppExtComObj.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "StartMenuExperienceHost" /sc ONLOGON /tr "'C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost\StartMenuExperienceHost.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
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Downloads
JEDcOjKcz5t.vbe
SessionHostmonitorNetsavesHost.exe
vkBwAxiibpq4vERKhn6zEWt.bat
memory/456-12-0x00007FFE387D3000-0x00007FFE387D5000-memory.dmp
memory/456-13-0x00000000007C0000-0x00000000008E4000-memory.dmp
memory/3956-35-0x0000000002F00000-0x0000000002F0C000-memory.dmp
memory/3956-36-0x0000000002F10000-0x0000000002F1C000-memory.dmp
memory/3956-38-0x000000001B830000-0x000000001B83C000-memory.dmp
memory/3956-37-0x0000000002F20000-0x0000000002F2C000-memory.dmp
memory/3956-40-0x000000001B860000-0x000000001B86A000-memory.dmp
memory/3956-39-0x000000001B840000-0x000000001B848000-memory.dmp