Analysis
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max time kernel
150s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240220-en -
resource tags
arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system -
submitted
20-04-2024 07:14
Static task
static1
Behavioral task
behavioral1
Sample
1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe
Resource
win7-20240220-en
Behavioral task
behavioral2
Sample
1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe
Resource
win10v2004-20240412-en
General
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Target
1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe
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Size
404KB
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MD5
e01e12c713318d8ada94e3433e2b0c16
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SHA1
aae7eed5e324ec26e1a4dc0b48ca4e4fd48b795b
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SHA256
1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f
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SHA512
8c0057e5c1cea10efccbdcdecb5caed3615e5380ff3ced9ffe2d947aa43d1236d98a30d8e768aed79beae619d5b506a3cf17aea6c934abc65eeefb37a53befe7
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SSDEEP
6144:3w9D91dOrcN3ZGXNYFNmIkYvUIelVjjVtGRyFH4:gtRfJcNYFNm8UhlZGse
Malware Config
Signatures
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Blocklisted process makes network request 10 IoCs
Processes:
rundll32.exeflow pid process 3 2620 rundll32.exe 5 2620 rundll32.exe 8 2620 rundll32.exe 9 2620 rundll32.exe 10 2620 rundll32.exe 13 2620 rundll32.exe 14 2620 rundll32.exe 15 2620 rundll32.exe 17 2620 rundll32.exe 18 2620 rundll32.exe -
Deletes itself 1 IoCs
Processes:
mjlki.exepid process 2580 mjlki.exe -
Executes dropped EXE 1 IoCs
Processes:
mjlki.exepid process 2580 mjlki.exe -
Loads dropped DLL 6 IoCs
Processes:
cmd.exerundll32.exepid process 2776 cmd.exe 2776 cmd.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
rundll32.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\ebyea\\pwemnzp.dll\",Verify" rundll32.exe -
Enumerates connected drives 3 TTPs 23 IoCs
Attempts to read the root path of hard drives other than the default C: drive.
Processes:
rundll32.exedescription ioc process File opened (read-only) \??\g: rundll32.exe File opened (read-only) \??\u: rundll32.exe File opened (read-only) \??\w: rundll32.exe File opened (read-only) \??\a: rundll32.exe File opened (read-only) \??\l: rundll32.exe File opened (read-only) \??\m: rundll32.exe File opened (read-only) \??\p: rundll32.exe File opened (read-only) \??\q: rundll32.exe File opened (read-only) \??\t: rundll32.exe File opened (read-only) \??\v: rundll32.exe File opened (read-only) \??\h: rundll32.exe File opened (read-only) \??\i: rundll32.exe File opened (read-only) \??\n: rundll32.exe File opened (read-only) \??\o: rundll32.exe File opened (read-only) \??\y: rundll32.exe File opened (read-only) \??\b: rundll32.exe File opened (read-only) \??\j: rundll32.exe File opened (read-only) \??\k: rundll32.exe File opened (read-only) \??\r: rundll32.exe File opened (read-only) \??\s: rundll32.exe File opened (read-only) \??\x: rundll32.exe File opened (read-only) \??\z: rundll32.exe File opened (read-only) \??\e: rundll32.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
Processes:
rundll32.exedescription ioc process File opened for modification \??\PHYSICALDRIVE0 rundll32.exe -
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
Processes:
rundll32.exepid process 2620 rundll32.exe -
Drops file in Program Files directory 2 IoCs
Processes:
mjlki.exedescription ioc process File created \??\c:\Program Files\ebyea\pwemnzp.dll mjlki.exe File opened for modification \??\c:\Program Files\ebyea mjlki.exe -
Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
rundll32.exedescription ioc process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 rundll32.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString rundll32.exe -
Runs ping.exe 1 TTPs 1 IoCs
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Suspicious behavior: EnumeratesProcesses 64 IoCs
Processes:
rundll32.exepid process 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe 2620 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
rundll32.exedescription pid process Token: SeDebugPrivilege 2620 rundll32.exe -
Suspicious use of SetWindowsHookEx 2 IoCs
Processes:
1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exemjlki.exepid process 2184 1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe 2580 mjlki.exe -
Suspicious use of WriteProcessMemory 19 IoCs
Processes:
1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.execmd.exemjlki.exedescription pid process target process PID 2184 wrote to memory of 2776 2184 1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe cmd.exe PID 2184 wrote to memory of 2776 2184 1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe cmd.exe PID 2184 wrote to memory of 2776 2184 1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe cmd.exe PID 2184 wrote to memory of 2776 2184 1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe cmd.exe PID 2776 wrote to memory of 2568 2776 cmd.exe PING.EXE PID 2776 wrote to memory of 2568 2776 cmd.exe PING.EXE PID 2776 wrote to memory of 2568 2776 cmd.exe PING.EXE PID 2776 wrote to memory of 2568 2776 cmd.exe PING.EXE PID 2776 wrote to memory of 2580 2776 cmd.exe mjlki.exe PID 2776 wrote to memory of 2580 2776 cmd.exe mjlki.exe PID 2776 wrote to memory of 2580 2776 cmd.exe mjlki.exe PID 2776 wrote to memory of 2580 2776 cmd.exe mjlki.exe PID 2580 wrote to memory of 2620 2580 mjlki.exe rundll32.exe PID 2580 wrote to memory of 2620 2580 mjlki.exe rundll32.exe PID 2580 wrote to memory of 2620 2580 mjlki.exe rundll32.exe PID 2580 wrote to memory of 2620 2580 mjlki.exe rundll32.exe PID 2580 wrote to memory of 2620 2580 mjlki.exe rundll32.exe PID 2580 wrote to memory of 2620 2580 mjlki.exe rundll32.exe PID 2580 wrote to memory of 2620 2580 mjlki.exe rundll32.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe"C:\Users\Admin\AppData\Local\Temp\1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe"1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.execmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\mjlki.exe "C:\Users\Admin\AppData\Local\Temp\1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe"2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\PING.EXEping 127.0.0.1 -n 23⤵
- Runs ping.exe
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C:\Users\Admin\AppData\Local\Temp\mjlki.exeC:\Users\Admin\AppData\Local\Temp\\mjlki.exe "C:\Users\Admin\AppData\Local\Temp\1bc415f48837c78610ac6a0ec65bb850b29af38b1f19a549affd75fde2ef972f.exe"3⤵
- Deletes itself
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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\??\c:\windows\SysWOW64\rundll32.exec:\windows\system32\rundll32.exe "c:\Program Files\ebyea\pwemnzp.dll",Verify C:\Users\Admin\AppData\Local\Temp\mjlki.exe4⤵
- Blocklisted process makes network request
- Loads dropped DLL
- Adds Run key to start application
- Enumerates connected drives
- Writes to the Master Boot Record (MBR)
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v13
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Replay Monitor
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Downloads
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\??\c:\Program Files\ebyea\pwemnzp.dllFilesize
228KB
MD5b2bd64f4e5e688db192779726f750156
SHA10c82867b01f850728003d96f45860299706d05de
SHA2563d498a09c2e63e1d01df22a693661c6f0af15cd17e8b284a7f189d78fb56fbd7
SHA512ab22b7d2ec95fd847c4051b925f8d15b74d5a66132f6860b0be6b047020aadda3e684bcde21312d634666e3c664762e8e6e0f5d80d024e0e7ef122535ae31b61
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\Users\Admin\AppData\Local\Temp\mjlki.exeFilesize
405KB
MD53d5013e496e27ff38943bee3edaeea4e
SHA10c72ec56827a3fcde97a1a4b954aa501df16f069
SHA2568882c3652325ec2d78ed65cf4a37125cbbf244963b69db37a66aea97f70e906e
SHA512b9c5976e464818a763dd847fc4bdabf3b0dad22491eaf7077d0463862529cbe28f7eafda42684cad867d0f646b395e8508ab56d42a1261db6752bdb40f94fede
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memory/2184-0-0x0000000000400000-0x0000000000464000-memory.dmpFilesize
400KB
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memory/2184-2-0x0000000000400000-0x0000000000464000-memory.dmpFilesize
400KB
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memory/2580-7-0x0000000000400000-0x0000000000464000-memory.dmpFilesize
400KB
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memory/2580-9-0x0000000000400000-0x0000000000464000-memory.dmpFilesize
400KB
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memory/2620-15-0x0000000010000000-0x0000000010080000-memory.dmpFilesize
512KB
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memory/2620-16-0x0000000010000000-0x0000000010080000-memory.dmpFilesize
512KB
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memory/2620-17-0x0000000010000000-0x0000000010080000-memory.dmpFilesize
512KB
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memory/2620-19-0x0000000010000000-0x0000000010080000-memory.dmpFilesize
512KB
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memory/2620-21-0x0000000010000000-0x0000000010080000-memory.dmpFilesize
512KB