Analysis
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max time kernel
122s -
max time network
123s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
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submitted
07-05-2024 02:10
General
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Target
4ddd13c4a3ffff1a0e3ef194e52f65a0_NEAS.exe
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Size
2.0MB
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MD5
4ddd13c4a3ffff1a0e3ef194e52f65a0
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SHA1
f19f68c1ee2313667722f18944fc1d3885b2199c
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SHA256
2db6b0154ea9e9ebd4c13868562e7147e8a2fcaaa5dadd497410745a377b0e44
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SHA512
5e274b01576b54490dc1af367e6b016396238cd9fee2c3d4ff52419a72e4d7613a5d46340bc6337f955fe850bcd8c564d3d8ad5a21e7b2d95bdf00d4c6949bf3
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SSDEEP
24576:Un2XTCHM4xT9V3XzsHhVmatCELYIXVelAtgbHHd:CaTUv0jmtEttc
Malware Config
Signatures
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DcRat 11 IoCs
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Modifies WinLogon for persistence 2 TTPs 3 IoCs
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Process spawned unexpected child process 9 IoCs
This typically indicates the parent process was compromised via an exploit or macro.
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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 6 IoCs
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Drops file in Program Files directory 5 IoCs
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Drops file in Windows 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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Creates scheduled task(s) 1 TTPs 9 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 2 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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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\4ddd13c4a3ffff1a0e3ef194e52f65a0_NEAS.exe"C:\Users\Admin\AppData\Local\Temp\4ddd13c4a3ffff1a0e3ef194e52f65a0_NEAS.exe"1⤵
- DcRat
- Modifies WinLogon for persistence
- Adds Run key to start application
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Default User\dllhost.exe"C:\Users\Default User\dllhost.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwmd" /sc MINUTE /mo 14 /tr "'C:\Program Files\Windows Defender\it-IT\dwm.exe'" /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files\Windows Defender\it-IT\dwm.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dwmd" /sc MINUTE /mo 8 /tr "'C:\Program Files\Windows Defender\it-IT\dwm.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Windows\PolicyDefinitions\fr-FR\wininit.exe'" /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Windows\PolicyDefinitions\fr-FR\wininit.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "wininitw" /sc MINUTE /mo 12 /tr "'C:\Windows\PolicyDefinitions\fr-FR\wininit.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 12 /tr "'C:\Users\Default User\dllhost.exe'" /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhost" /sc ONLOGON /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "dllhostd" /sc MINUTE /mo 14 /tr "'C:\Users\Default User\dllhost.exe'" /rl HIGHEST /f1⤵
- DcRat
- Process spawned unexpected child process
- Creates scheduled task(s)
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2.0MB
MD54ddd13c4a3ffff1a0e3ef194e52f65a0
SHA1f19f68c1ee2313667722f18944fc1d3885b2199c
SHA2562db6b0154ea9e9ebd4c13868562e7147e8a2fcaaa5dadd497410745a377b0e44
SHA5125e274b01576b54490dc1af367e6b016396238cd9fee2c3d4ff52419a72e4d7613a5d46340bc6337f955fe850bcd8c564d3d8ad5a21e7b2d95bdf00d4c6949bf3
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Filesize
2.0MB
MD51993eacdc7b7e6060ebed1114d631dc0
SHA17e2b7287550ebb45936e5381b5a6784c480de3ba
SHA256bc5a360a7537cb5204095d9c7ff444355f6048df39d27e37b67c5214135e53d4
SHA512ce1ae06a0a585b752cfa77b952059ef66f9ad565e66331be8ed9cbec03182d3d0d4f7db19f5fea4c5a734e63fe2cd16a05023fcda4d7e59a3d389781a8632340
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Filesize
2.0MB
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Filesize
48KB
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Filesize
48KB
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Filesize
64KB
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Filesize
88KB
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Filesize
344KB
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Filesize
4KB
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Filesize
48KB
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Filesize
32KB
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Filesize
56KB
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Filesize
56KB
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Filesize
40KB
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Filesize
112KB
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Filesize
9.9MB
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Filesize
2.0MB
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Filesize
9.9MB