Analysis
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max time kernel
119s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
04-12-2024 18:05
General
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Target
73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe
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Size
952KB
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MD5
dc100730c11f4a70e5324f4a0a0358f2
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SHA1
561a80a6284540fe9f3c30a2495f51c9e1077ab0
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SHA256
73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15
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SHA512
d8f497520b432fa8ebd07d39a8b922b38f1dc9a954ad9646ec46c456e4476a1e856826497a23525a33690ce464796c65db9714a86e9d6af922aecc8ee85772e6
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SSDEEP
24576:e+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXXn:Z8/KfRTKN
Malware Config
Signatures
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Dcrat family
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Modifies WinLogon for persistence 2 TTPs 11 IoCs
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Process spawned unexpected child process 11 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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UAC bypass 3 TTPs 6 IoCs
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DCRat payload 5 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
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Executes dropped EXE 1 IoCs
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Adds Run key to start application 2 TTPs 22 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 20 IoCs
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Drops file in Program Files directory 5 IoCs
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Drops file in Windows directory 10 IoCs
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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Scheduled Task/Job: Scheduled Task 1 TTPs 11 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 3 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 3 IoCs
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System policy modification 1 TTPs 6 IoCs
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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\73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe"C:\Users\Admin\AppData\Local\Temp\73eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15.exe"1⤵
- Modifies WinLogon for persistence
- UAC bypass
- 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
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C:\Windows\System32\cryptxml\spoolsv.exe"C:\Windows\System32\cryptxml\spoolsv.exe"2⤵
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Windows\System32\api-ms-win-core-io-l1-1-0\dllhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "OSPPSVC" /sc ONLOGON /tr "'C:\Program Files\Common Files\Microsoft Shared\OfficeSoftwareProtectionPlatform\OSPPSVC\OSPPSVC.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "lsass" /sc ONLOGON /tr "'C:\Windows\it-IT\lsass.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "sppsvc" /sc ONLOGON /tr "'C:\Windows\System32\KBDSYR1\sppsvc.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "services" /sc ONLOGON /tr "'C:\PerfLogs\Admin\services.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\ProgramData\Adobe\Updater6\Idle.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "winlogon" /sc ONLOGON /tr "'C:\PerfLogs\Admin\winlogon.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "spoolsv" /sc ONLOGON /tr "'C:\Windows\System32\cryptxml\spoolsv.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "Idle" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0117-0409-0000-0000000FF1CE}-C\Access.en-us\Idle.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "taskhost" /sc ONLOGON /tr "'C:\Windows\Logs\DPX\taskhost.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "csrss" /sc ONLOGON /tr "'C:\Windows\System32\mtxoci\csrss.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
952KB
MD563ea64d019b0d139f4de8f4b2692148b
SHA1a7aa47fd819edc411b9dced080dc732e8f520856
SHA2563570426294997c0ff3555a399a2e3c193575293fc6ee4a457b95dbcfe5e5232a
SHA512f2543afb9130efa3cd0f93d1c80a02d3d2dacb65d626401f7fc0a9522cb9f28a9c44dff8d242364a43c029c36663b08ef7463c6a2b6739465dbbbb8813e6d78e
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Filesize
952KB
MD5dc100730c11f4a70e5324f4a0a0358f2
SHA1561a80a6284540fe9f3c30a2495f51c9e1077ab0
SHA25673eaa2708311d2ac31d2a440146fccf8c44d4cf3f2413620aaad7ff096a8fe15
SHA512d8f497520b432fa8ebd07d39a8b922b38f1dc9a954ad9646ec46c456e4476a1e856826497a23525a33690ce464796c65db9714a86e9d6af922aecc8ee85772e6
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Filesize
952KB
MD528489f9a355df9ebd145678ca7a99ae1
SHA1ff4143416fcc7eeda3d2c29cc65e9a57ac9c4e2d
SHA2562c9e36d7ca2294b5fbad8d0d91351e1529dcb3df55d74e106620c79eabedc1e1
SHA51235be96c1ace73e84053fab6a5af23bfe90704fea41e943f92f4259fcd11f7d6605a03dc55ce020a0e4ed0fedf03e4bdb9bc0754883fe1244eddbcb59d5b5dbdf
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Filesize
64KB
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Filesize
40KB
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Filesize
40KB
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Filesize
48KB
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Filesize
40KB
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Filesize
32KB
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Filesize
48KB
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Filesize
4KB
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Filesize
48KB
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Filesize
64KB
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Filesize
9.9MB
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Filesize
976KB
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Filesize
9.9MB
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Filesize
976KB