Analysis
- max time kernel
150s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
06/01/2023, 11:13
General
- Target file.exe
- Size 312KB
- Sample230106-nbd7hsbe4x
- SHA256 dcbe4edc935bd43c595a565e6112695950fd9ea0a4868e99f54cb63c8ed4a613
Malware Config
Signatures
- Detects Smokeloader packer 1 IoCs
- SmokeLoader
Modular backdoor trojan in use since 2014.
- Blocklisted process makes network request 1 IoCs
- Downloads MZ/PE file
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Program crash 1 IoCs
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Checks processor information in registry 2 TTPs 18 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies Internet Explorer settings 1 TTPs 4 IoCs
- Modifies registry class 30 IoCs
- Suspicious behavior: AddClipboardFormatListener 1 IoCs
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 28 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
-
C:\Users\Admin\AppData\Local\Temp\DE5E.exeC:\Users\Admin\AppData\Local\Temp\DE5E.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\rundll32.exeC:\Windows\system32\rundll32.exe C:\Users\Admin\AppData\Local\Temp\Rewurtuihyfrtty.dll,start2⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" "C:\Windows\system32\shell32.dll",#61 140743⤵
- Modifies registry class
- Suspicious use of FindShellTrayWindow
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 648 -s 4802⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 648 -ip 6481⤵
-
C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
DE5E.exe
DE5E.exe
Rewurtuihyfrtty.dll
Rewurtuihyfrtty.dll
Rewurtuihyfrtty.dll
memory/648-170-0x0000000000400000-0x0000000002FAE000-memory.dmp
memory/648-163-0x0000000000400000-0x0000000002FAE000-memory.dmp
memory/648-162-0x0000000000400000-0x0000000002FAE000-memory.dmp
memory/648-161-0x0000000005030000-0x0000000005510000-memory.dmp
memory/648-160-0x0000000003507000-0x000000000388A000-memory.dmp
memory/2764-173-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-178-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-145-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-147-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-146-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-148-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-149-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-150-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-151-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-152-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-153-0x00000000029A0000-0x00000000029B0000-memory.dmp
memory/2764-154-0x00000000029C0000-0x00000000029D0000-memory.dmp
memory/2764-143-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-142-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-141-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-158-0x00000000029C0000-0x00000000029D0000-memory.dmp
memory/2764-159-0x00000000029C0000-0x00000000029D0000-memory.dmp
memory/2764-140-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-139-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-138-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-137-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-201-0x0000000002400000-0x0000000002410000-memory.dmp
memory/2764-136-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-200-0x0000000002400000-0x0000000002410000-memory.dmp
memory/2764-199-0x0000000002410000-0x0000000002420000-memory.dmp
memory/2764-198-0x00000000023F0000-0x0000000002400000-memory.dmp
memory/2764-192-0x0000000002400000-0x0000000002410000-memory.dmp
memory/2764-191-0x0000000002400000-0x0000000002410000-memory.dmp
memory/2764-190-0x0000000002410000-0x0000000002420000-memory.dmp
memory/2764-172-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-189-0x00000000023F0000-0x0000000002400000-memory.dmp
memory/2764-174-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-175-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-176-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-177-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-144-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-179-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-180-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-181-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-182-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-183-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-184-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-185-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-186-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-187-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/2764-188-0x00000000024A0000-0x00000000024B0000-memory.dmp
memory/3260-211-0x0000024E26C90000-0x0000024E26F43000-memory.dmp
memory/3260-210-0x0000000000960000-0x0000000000C02000-memory.dmp
memory/3260-209-0x0000024E286F0000-0x0000024E28830000-memory.dmp
memory/3260-208-0x0000024E286F0000-0x0000024E28830000-memory.dmp
memory/3620-207-0x0000000004D29000-0x0000000004D2B000-memory.dmp
memory/3620-196-0x0000000004CB0000-0x0000000004DF0000-memory.dmp
memory/3620-197-0x0000000004CB0000-0x0000000004DF0000-memory.dmp
memory/3620-168-0x0000000002DD0000-0x000000000321F000-memory.dmp
memory/3620-212-0x0000000004020000-0x0000000004BA6000-memory.dmp
memory/3620-171-0x0000000002DD0000-0x000000000321F000-memory.dmp
memory/3620-169-0x0000000002DD0000-0x000000000321F000-memory.dmp
memory/3620-202-0x0000000004CB0000-0x0000000004DF0000-memory.dmp
memory/3620-203-0x0000000004CB0000-0x0000000004DF0000-memory.dmp
memory/3620-205-0x0000000004CB0000-0x0000000004DF0000-memory.dmp
memory/3620-204-0x0000000004CB0000-0x0000000004DF0000-memory.dmp
memory/3620-194-0x0000000004020000-0x0000000004BA6000-memory.dmp
memory/3620-195-0x0000000004020000-0x0000000004BA6000-memory.dmp
memory/3620-193-0x0000000004020000-0x0000000004BA6000-memory.dmp
memory/4976-132-0x0000000002FB7000-0x0000000002FCC000-memory.dmp
memory/4976-133-0x0000000002D90000-0x0000000002D99000-memory.dmp
memory/4976-135-0x0000000000400000-0x0000000002C3F000-memory.dmp
memory/4976-134-0x0000000000400000-0x0000000002C3F000-memory.dmp