Analysis
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max time kernel
150s -
max time network
156s -
platform
windows10-2004_x64 -
resource
win10v2004-20230915-en -
resource tags
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submitted
13-10-2023 20:26
General
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Target
NEAS.66c158147321a1ee377aaca871f67c10.exe
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Size
783KB
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MD5
66c158147321a1ee377aaca871f67c10
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SHA1
e7d81492b40cf90d611538d4e9982919873ddb58
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SHA256
bf35292b701b24b6a18aa29f6dd6c651d8a50b24098440fc90b8423ca732ee06
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SHA512
23fd4833c37bc4d7fa2e5b58966431ab826540f7d1f2aa4f8a148fda666f5d1cf9624c6821528ab203012bf52cf77b1cd0c2de89bf2c8d2f0ef4ad64dbd351f4
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SSDEEP
12288:GqnOYxdAgpoNeF91rg5iFdr0yQ9gYx+EIpakCYJRU7Q9bWoFzqK:G+OQbpbgsFdAyQvzSqaq8q
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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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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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE 1 IoCs
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Adds Run key to start application 2 TTPs 4 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 directory 8 IoCs
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Drops file in Program Files directory 4 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 4 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Modifies registry class 1 IoCs
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Suspicious behavior: EnumeratesProcesses 16 IoCs
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Suspicious use of AdjustPrivilegeToken 2 IoCs
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Suspicious use of WriteProcessMemory 6 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\NEAS.66c158147321a1ee377aaca871f67c10.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.66c158147321a1ee377aaca871f67c10.exe"1⤵
- 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
- Modifies registry class
- 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\spx4VPmLa2.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:\Windows\System32\wbem\wdigest\unsecapp.exe"C:\Windows\System32\wbem\wdigest\unsecapp.exe"3⤵
- UAC bypass
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- System policy modification
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "NEAS.66c158147321a1ee377aaca871f67c10" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\Temp\chrome_installer\NEAS.66c158147321a1ee377aaca871f67c10.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "unsecapp" /sc ONLOGON /tr "'C:\Windows\System32\wbem\wdigest\unsecapp.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "OfficeClickToRun" /sc ONLOGON /tr "'C:\Program Files\Common Files\microsoft shared\ClickToRun\C2RINTL.zh-cn\OfficeClickToRun.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
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C:\Windows\system32\schtasks.exeschtasks.exe /create /tn "RuntimeBroker" /sc ONLOGON /tr "'C:\Windows\System32\wmpeffects\RuntimeBroker.exe'" /rl HIGHEST /f1⤵
- Process spawned unexpected child process
- Creates scheduled task(s)
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
783KB
MD566c158147321a1ee377aaca871f67c10
SHA1e7d81492b40cf90d611538d4e9982919873ddb58
SHA256bf35292b701b24b6a18aa29f6dd6c651d8a50b24098440fc90b8423ca732ee06
SHA51223fd4833c37bc4d7fa2e5b58966431ab826540f7d1f2aa4f8a148fda666f5d1cf9624c6821528ab203012bf52cf77b1cd0c2de89bf2c8d2f0ef4ad64dbd351f4
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Filesize
209B
MD50d35fe988fef2475c6566b88a6bca142
SHA1652e5fc85c4342a6b46655b2d40416b06b511d5e
SHA256510a1691470c780843d904a0d583b6b5389d7a8bdd15fbb613ca54127e866d0c
SHA512652fbc86255f5b8ffbb108896fa7ed0fce0c4f0fd43b790fc7a05005a76e57353c259663b415c6d9f1d89c24f828d5e907e06129861d5daa06d20047fa966e4c
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Filesize
783KB
MD566c158147321a1ee377aaca871f67c10
SHA1e7d81492b40cf90d611538d4e9982919873ddb58
SHA256bf35292b701b24b6a18aa29f6dd6c651d8a50b24098440fc90b8423ca732ee06
SHA51223fd4833c37bc4d7fa2e5b58966431ab826540f7d1f2aa4f8a148fda666f5d1cf9624c6821528ab203012bf52cf77b1cd0c2de89bf2c8d2f0ef4ad64dbd351f4
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Filesize
783KB
MD566c158147321a1ee377aaca871f67c10
SHA1e7d81492b40cf90d611538d4e9982919873ddb58
SHA256bf35292b701b24b6a18aa29f6dd6c651d8a50b24098440fc90b8423ca732ee06
SHA51223fd4833c37bc4d7fa2e5b58966431ab826540f7d1f2aa4f8a148fda666f5d1cf9624c6821528ab203012bf52cf77b1cd0c2de89bf2c8d2f0ef4ad64dbd351f4
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Filesize
32KB
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Filesize
48KB
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Filesize
32KB
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Filesize
64KB
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Filesize
40KB
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Filesize
40KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
32KB
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Filesize
64KB
-
Filesize
64KB
-
Filesize
64KB
-
Filesize
808KB
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Filesize
48KB
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Filesize
32KB
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Filesize
64KB
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Filesize
32KB
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Filesize
32KB
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Filesize
10.8MB
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Filesize
64KB
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Filesize
64KB
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Filesize
64KB
-
Filesize
64KB
-
Filesize
64KB
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Filesize
32KB
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Filesize
10.8MB
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Filesize
64KB
-
Filesize
10.8MB
-
Filesize
10.8MB
-
Filesize
64KB
-
Filesize
64KB
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Filesize
64KB
-
Filesize
10.8MB
-
Filesize
64KB
-
Filesize
64KB
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Filesize
64KB
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Filesize
10.8MB