Analysis Overview
SHA256
86fef9a0b3ebbc4c1ec52112056e6e21e79b6447bf28a8b1e13d2783fd120f9f
Threat Level: Known bad
The file 86fef9a0b3ebbc4c1ec52112056e6e21e79b6447bf28a8b1e13d2783fd120f9f was found to be: Known bad.
Malicious Activity Summary
Ramnit
UPX dump on OEP (original entry point)
Loads dropped DLL
Executes dropped EXE
UPX packed file
Drops file in System32 directory
Unsigned PE
Program crash
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2024-03-29 22:57
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-29 22:57
Reported
2024-03-29 23:00
Platform
win7-20240221-en
Max time kernel
122s
Max time network
122s
Command Line
Signatures
Ramnit
UPX dump on OEP (original entry point)
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32mgr.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32mgr.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\rundll32mgr.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\rundll32mgr.exe | C:\Windows\SysWOW64\rundll32.exe | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\rundll32mgr.exe |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\86fef9a0b3ebbc4c1ec52112056e6e21e79b6447bf28a8b1e13d2783fd120f9f.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\86fef9a0b3ebbc4c1ec52112056e6e21e79b6447bf28a8b1e13d2783fd120f9f.dll,#1
C:\Windows\SysWOW64\rundll32mgr.exe
C:\Windows\SysWOW64\rundll32mgr.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2180 -s 180
Network
Files
\Windows\SysWOW64\rundll32mgr.exe
| MD5 | 2ad7467eeceedd64b8bd4f6e04c3cd49 |
| SHA1 | d6c5d9878dc49ae9b531d61283609e207154a921 |
| SHA256 | 2aab17b2f18dfb70cd737b27b1a438ad8878889070a6e025b3684483054f60c9 |
| SHA512 | 7a647d4a8de90d11cd5afb82ace8354869af0893f28afcf9491d1d4de421315d9a394a5d3462d88c0eff6c5a7a4ed41897d8d0498b59b4b7428ddbb61786be2a |
memory/1852-3-0x0000000000400000-0x0000000000432000-memory.dmp
memory/1852-2-0x0000000010000000-0x0000000010057000-memory.dmp
memory/1852-10-0x0000000000400000-0x0000000000432000-memory.dmp
memory/2180-14-0x0000000000400000-0x0000000000432000-memory.dmp
memory/2180-12-0x00000000003C0000-0x00000000003F2000-memory.dmp
memory/2180-11-0x0000000000400000-0x0000000000432000-memory.dmp
\Users\Admin\AppData\Local\Temp\~TM1268.tmp
| MD5 | d124f55b9393c976963407dff51ffa79 |
| SHA1 | 2c7bbedd79791bfb866898c85b504186db610b5d |
| SHA256 | ea1e16247c848c8c171c4cd1fa17bc5a018a1fcb0c0dac25009066b6667b8eef |
| SHA512 | 278fe3a4b1fbbe700e4f4483b610133e975e36e101455661d5197bd892a68839b9d555499040d200c92aefa9e3819380e395c0cd85d5fc845c6364d128a8cf06 |
memory/2180-20-0x00000000778C0000-0x00000000778C2000-memory.dmp
memory/2180-19-0x00000000778C0000-0x00000000778C1000-memory.dmp
memory/2180-18-0x00000000778BF000-0x00000000778C1000-memory.dmp
\Users\Admin\AppData\Local\Temp\~TM1298.tmp
| MD5 | 9b98d47916ead4f69ef51b56b0c2323c |
| SHA1 | 290a80b4ded0efc0fd00816f373fcea81a521330 |
| SHA256 | 96e0ae104c9662d0d20fdf59844c2d18334e5847b6c4fc7f8ce4b3b87f39887b |
| SHA512 | 68b67021f228d8d71df4deb0b6388558b2f935a6aa466a12199cd37ada47ee588ea407b278d190d3a498b0ef3f5f1a2573a469b7ea5561ab2e7055c45565fe94 |
memory/2180-25-0x0000000000400000-0x0000000000432000-memory.dmp
memory/2180-24-0x0000000076900000-0x0000000076A10000-memory.dmp
memory/2180-23-0x0000000076900000-0x0000000076A10000-memory.dmp
memory/2180-26-0x0000000076900000-0x0000000076A10000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-29 22:57
Reported
2024-03-29 23:00
Platform
win10v2004-20240226-en
Max time kernel
147s
Max time network
149s
Command Line
Signatures
Ramnit
UPX dump on OEP (original entry point)
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32mgr.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\rundll32mgr.exe | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\rundll32mgr.exe | C:\Windows\SysWOW64\rundll32.exe | N/A |
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Windows\SysWOW64\rundll32mgr.exe |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3516 wrote to memory of 4944 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3516 wrote to memory of 4944 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3516 wrote to memory of 4944 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 4944 wrote to memory of 4752 | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Windows\SysWOW64\rundll32mgr.exe |
| PID 4944 wrote to memory of 4752 | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Windows\SysWOW64\rundll32mgr.exe |
| PID 4944 wrote to memory of 4752 | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Windows\SysWOW64\rundll32mgr.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\86fef9a0b3ebbc4c1ec52112056e6e21e79b6447bf28a8b1e13d2783fd120f9f.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\86fef9a0b3ebbc4c1ec52112056e6e21e79b6447bf28a8b1e13d2783fd120f9f.dll,#1
C:\Windows\SysWOW64\rundll32mgr.exe
C:\Windows\SysWOW64\rundll32mgr.exe
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4752 -ip 4752
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 4752 -s 484
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 40.134.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 20.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 35.34.16.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 31.243.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
Files
memory/4944-1-0x0000000010000000-0x0000000010057000-memory.dmp
C:\Windows\SysWOW64\rundll32mgr.exe
| MD5 | 2ad7467eeceedd64b8bd4f6e04c3cd49 |
| SHA1 | d6c5d9878dc49ae9b531d61283609e207154a921 |
| SHA256 | 2aab17b2f18dfb70cd737b27b1a438ad8878889070a6e025b3684483054f60c9 |
| SHA512 | 7a647d4a8de90d11cd5afb82ace8354869af0893f28afcf9491d1d4de421315d9a394a5d3462d88c0eff6c5a7a4ed41897d8d0498b59b4b7428ddbb61786be2a |
memory/4752-4-0x0000000000400000-0x0000000000432000-memory.dmp
memory/4752-6-0x0000000000400000-0x0000000000432000-memory.dmp
memory/4752-7-0x00000000006E0000-0x0000000000712000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\~TM4594.tmp
| MD5 | 4f3387277ccbd6d1f21ac5c07fe4ca68 |
| SHA1 | e16506f662dc92023bf82def1d621497c8ab5890 |
| SHA256 | 767a3fc4a7a6818cdc3f0b99aaa95db694f6bcde719d2057a88b3d4df3d74fac |
| SHA512 | 9da199ac69e3c0d4e0c6307e0ab8178f12cc25cb2f14c3511f6b64e6e60a925c860f3263cb38353a97b55a71ef4d27f8cb7fa3cfc08e7c1a349fd8d209dfa219 |
memory/4752-11-0x0000000077992000-0x0000000077993000-memory.dmp
memory/4752-12-0x0000000077992000-0x0000000077994000-memory.dmp