Analysis
- max time kernel
151s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
19/10/2022, 08:26
General
- Target 6b2bcd52baacd78179692cfa9c8b6c8a.exe
- Size 203KB
- Sample221019-kbvbysfah5
- SHA256 bcefdf8c2cbc735ff46edae5f02fee6767833f520805ffbbfd36f42bd7eb5218
Malware Config
Signatures
- DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
- Detects Smokeloader packer 1 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- DCRat payload 1 IoCs
Detects payload of DCRat, commonly dropped by NSIS installers.
- Downloads MZ/PE file
- Executes dropped EXE 5 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Uses the VBS compiler for execution 1 TTPs
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Suspicious use of SetThreadContext 1 IoCs
- Program crash 1 IoCs
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 19 IoCs
- Suspicious use of AdjustPrivilegeToken 14 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 53 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\6b2bcd52baacd78179692cfa9c8b6c8a.exe"C:\Users\Admin\AppData\Local\Temp\6b2bcd52baacd78179692cfa9c8b6c8a.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
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C:\Users\Admin\AppData\Local\Temp\CD1.exeC:\Users\Admin\AppData\Local\Temp\CD1.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\2490.exeC:\Users\Admin\AppData\Local\Temp\2490.exe1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
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C:\Users\Admin\AppData\Local\Temp\3D2A.exeC:\Users\Admin\AppData\Local\Temp\3D2A.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 100700 -s 14202⤵
- Program crash
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C:\Users\Admin\AppData\Local\Temp\4D48.exeC:\Users\Admin\AppData\Local\Temp\4D48.exe1⤵
- Executes dropped EXE
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C:\Users\Admin\AppData\Local\Temp\5298.exeC:\Users\Admin\AppData\Local\Temp\5298.exe1⤵
- Executes dropped EXE
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 100700 -ip 1007001⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
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C:\Windows\explorer.exeC:\Windows\explorer.exe1⤵
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C:\Windows\SysWOW64\explorer.exeC:\Windows\SysWOW64\explorer.exe1⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
2490.exe
2490.exe
3D2A.exe
3D2A.exe
4D48.exe
4D48.exe
5298.exe
5298.exe
CD1.exe
CD1.exe
memory/5084-133-0x00000000004E0000-0x00000000005E0000-memory.dmp
memory/5084-136-0x0000000000400000-0x0000000000438000-memory.dmp
memory/5084-135-0x0000000000400000-0x0000000000438000-memory.dmp
memory/5084-134-0x00000000004B0000-0x00000000004B9000-memory.dmp
memory/100592-175-0x0000000008700000-0x000000000870A000-memory.dmp
memory/100592-152-0x00000000078D0000-0x0000000007DFC000-memory.dmp
memory/100592-153-0x00000000074A0000-0x0000000007506000-memory.dmp
memory/100592-144-0x0000000000400000-0x0000000000570000-memory.dmp
memory/100592-150-0x0000000005DF0000-0x0000000006394000-memory.dmp
memory/100592-151-0x0000000005990000-0x00000000059E0000-memory.dmp
memory/100700-162-0x0000000005880000-0x000000000598A000-memory.dmp
memory/100700-159-0x0000000000740000-0x0000000000799000-memory.dmp
memory/100700-163-0x0000000005990000-0x00000000059CC000-memory.dmp
memory/100700-164-0x0000000006380000-0x0000000006412000-memory.dmp
memory/100700-165-0x0000000006580000-0x0000000006742000-memory.dmp
memory/100700-166-0x0000000006EB0000-0x0000000006F26000-memory.dmp
memory/100700-167-0x0000000006F60000-0x0000000006F7E000-memory.dmp
memory/100700-184-0x00000000007E3000-0x0000000000819000-memory.dmp
memory/100700-161-0x0000000000400000-0x00000000005B9000-memory.dmp
memory/100700-160-0x0000000005860000-0x0000000005872000-memory.dmp
memory/100700-185-0x0000000000400000-0x00000000005B9000-memory.dmp
memory/100700-158-0x00000000051A0000-0x00000000057B8000-memory.dmp
memory/100700-157-0x00000000007E3000-0x0000000000819000-memory.dmp
memory/100932-177-0x0000000000F00000-0x0000000000F07000-memory.dmp
memory/100932-178-0x0000000000EF0000-0x0000000000EFB000-memory.dmp
memory/100932-204-0x0000000000F00000-0x0000000000F07000-memory.dmp
memory/101044-179-0x0000000000BE0000-0x0000000000BE9000-memory.dmp
memory/101044-180-0x0000000000BD0000-0x0000000000BDF000-memory.dmp
memory/101044-205-0x0000000000BE0000-0x0000000000BE9000-memory.dmp
memory/101124-182-0x0000000000E10000-0x0000000000E15000-memory.dmp
memory/101124-183-0x0000000000E00000-0x0000000000E09000-memory.dmp
memory/101124-206-0x0000000000E10000-0x0000000000E15000-memory.dmp
memory/101180-187-0x0000000000780000-0x0000000000786000-memory.dmp
memory/101180-188-0x0000000000770000-0x000000000077C000-memory.dmp
memory/101180-207-0x0000000000780000-0x0000000000786000-memory.dmp
memory/101208-190-0x0000000000AC0000-0x0000000000AE2000-memory.dmp
memory/101208-191-0x0000000000A90000-0x0000000000AB7000-memory.dmp
memory/101208-208-0x0000000000AC0000-0x0000000000AE2000-memory.dmp
memory/101248-194-0x0000000000AA0000-0x0000000000AA9000-memory.dmp
memory/101248-209-0x0000000000AB0000-0x0000000000AB5000-memory.dmp
memory/101248-193-0x0000000000AB0000-0x0000000000AB5000-memory.dmp
memory/101276-197-0x0000000000820000-0x000000000082B000-memory.dmp
memory/101276-196-0x0000000000830000-0x0000000000836000-memory.dmp
memory/101276-210-0x0000000000830000-0x0000000000836000-memory.dmp
memory/101304-200-0x0000000000BF0000-0x0000000000BFD000-memory.dmp
memory/101304-199-0x0000000000E00000-0x0000000000E07000-memory.dmp
memory/101304-211-0x0000000000E00000-0x0000000000E07000-memory.dmp
memory/101332-203-0x00000000007B0000-0x00000000007BB000-memory.dmp
memory/101332-202-0x00000000007C0000-0x00000000007C8000-memory.dmp
memory/101332-212-0x00000000007C0000-0x00000000007C8000-memory.dmp