Analysis
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max time kernel
118s -
max time network
120s -
platform
windows7_x64 -
resource
win7-20240903-en -
resource tags
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submitted
11-12-2024 22:14
General
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Target
5bdee06daba59fe190c2d50c3f553c1ed64ddb9202b548b89c1714bef49be5f9.exe
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Size
952KB
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MD5
26c699f748a3e68a629350477bf1d5bc
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SHA1
720cf7b11430e765a673ec4210fe953cd58e1dd4
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SHA256
5bdee06daba59fe190c2d50c3f553c1ed64ddb9202b548b89c1714bef49be5f9
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SHA512
5eecc11b0bb4a699b409bf148921e1401b850f06df1e51bc9bc447956fffc0f16316f573c9e01890da61133414a5faea37bf9d85c3697569be5dbb1d723bb187
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SSDEEP
24576:++O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:58/KfRTK
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 4 IoCs
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Process spawned unexpected child process 4 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 4 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 8 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 5 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 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 1 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 9 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\5bdee06daba59fe190c2d50c3f553c1ed64ddb9202b548b89c1714bef49be5f9.exe"C:\Users\Admin\AppData\Local\Temp\5bdee06daba59fe190c2d50c3f553c1ed64ddb9202b548b89c1714bef49be5f9.exe"1⤵
- Modifies WinLogon for persistence
- UAC bypass
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- System policy modification
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\XDawAzvz42.bat"2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\w32tm.exew32tm /stripchart /computer:localhost /period:5 /dataonly /samples:23⤵
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C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\taskhost.exe"C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\taskhost.exe"3⤵
- 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 "taskhost" /sc ONLOGON /tr "'C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\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 "lsass" /sc ONLOGON /tr "'C:\Users\Public\Documents\My Videos\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 "winlogon" /sc ONLOGON /tr "'C:\Windows\System32\RpcRtRemote\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 "lsass" /sc ONLOGON /tr "'C:\Recovery\20e7eb62-69f6-11ef-be0c-62cb582c238c\lsass.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
MD526c699f748a3e68a629350477bf1d5bc
SHA1720cf7b11430e765a673ec4210fe953cd58e1dd4
SHA2565bdee06daba59fe190c2d50c3f553c1ed64ddb9202b548b89c1714bef49be5f9
SHA5125eecc11b0bb4a699b409bf148921e1401b850f06df1e51bc9bc447956fffc0f16316f573c9e01890da61133414a5faea37bf9d85c3697569be5dbb1d723bb187
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Filesize
239B
MD5d68629313bbbeff8c68b6260d52d0422
SHA19c623b43ada285a899d840d4d0f015fe920028cf
SHA256e94c1a0f0d3261b24972b48fb4b70a52b866848b863f7a006862ea602bd7ce01
SHA512d219a214bc53327d2e90b58f1f95de96248560ea9e154cd6c34e64fcc558cfe80e7301aff359552ddb21261b9a57abb67795df26c2607b2c6f48d7ea193d6791
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Filesize
952KB
MD51d61a4644ec87d19e96e018a02267796
SHA1bbb65d9ef6a8aca0e204d0fb0534005800521b30
SHA256d1c0e63686e58a2a1a40794abeafc6db3640089312765320324943a5f190ad0b
SHA512c6889af593b7248828eb7ce7bcc479621336d0d73954ca917e776923760ca768725b2d64f970227a6ee7b25dce1202f2cdd23120c1a2cb839ed60836cd3f18c7
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Filesize
976KB
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Filesize
64KB
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Filesize
40KB
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Filesize
48KB
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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
64KB
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Filesize
9.9MB
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Filesize
9.9MB
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Filesize
976KB