Analysis
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max time kernel
61s -
max time network
49s -
platform
windows7_x64 -
resource
win7-20240729-en -
resource tags
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submitted
25-01-2025 07:39
General
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Target
4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd.exe
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Size
952KB
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MD5
0ebb2d19c8a22a1a31f2088164233d7c
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SHA1
ba880d1df17a566198ed16f91ae16126c9103a40
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SHA256
4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd
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SHA512
373f71389e03747a73ef5d02ba998cea4f60eb718af44bce83def2395c1fbcaf99bacf78b9fc79eea9c24018a81864a17cfb81bbe8462d8eb9e6b4874b56fdb5
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SSDEEP
24576:2+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXXu:R8/KfRTKM
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 3 IoCs
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Process spawned unexpected child process 3 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 6 IoCs
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Checks whether UAC is enabled 1 TTPs 4 IoCs
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Drops file in System32 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 3 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\4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd.exe"C:\Users\Admin\AppData\Local\Temp\4d68ce61047c125e3537ec992fd0a6a156bf64f21aa1c55c909aedf5871fe2cd.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\xHdPBmhqtS.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:\Recovery\3a99bb82-4e15-11ef-8354-cae67966b5f6\Idle.exe"C:\Recovery\3a99bb82-4e15-11ef-8354-cae67966b5f6\Idle.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 "Idle" /sc ONLOGON /tr "'C:\Recovery\3a99bb82-4e15-11ef-8354-cae67966b5f6\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 "wininit" /sc ONLOGON /tr "'C:\Windows\System32\api-ms-win-crt-conio-l1-1-0\wininit.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\System32\pnidui\taskhost.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
MD5d34faac709c42364e40c0dce2e1d8e30
SHA1db6740044a2f829a5a0063e3eaf8e21902cf56b3
SHA256c79981b0074ac288d065d459de654d9b7003f625d76526211805decdaa94f96e
SHA512093f1046fccad9566a6a5453afaec3f228e59598db69adc9a75665bd94cd81462bc87f392dbb2a59452d78ee8a0f6a0f30088d708bb750005b4c923fcf03403c
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Filesize
221B
MD5e351bdd0fae68974ca5f6d861468ffd5
SHA1c63faa3771eb42c3e7387a222dfaa120fbf537f8
SHA256c644bbf5ebd6145731660bafbf1300f62be4e532b4ea8816a0ba237c69086fc5
SHA512f8d2950130af3ff0d989e7de3be97390a9a638a84039b9ae2274371fdeebccfe8b922084ec91eea41fa1831fbfc8d48d7a3871aa253c7b1a2147592a8e586aa7
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Filesize
952KB
MD598f4462a62737f4df9b00a46daedc726
SHA14223469a083f9e87deef5e867071a187a302c28c
SHA256760cdd9618bb7fe158b0193923d0d2494a768ce8d83316b978ebd11e5bae1907
SHA512751653eb295ba340293572e0a552dee0bc1f8cdf8157843572c04abd15426e90784f9d74b0096dc32ef7596ce5aa166b360150f9e3a53c2088f7ec77ce541f6d
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Filesize
64KB
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Filesize
48KB
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Filesize
48KB
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Filesize
40KB
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Filesize
40KB
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Filesize
32KB
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Filesize
40KB
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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
9.9MB
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Filesize
976KB
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Filesize
976KB