Analysis Overview
SHA256
b5ac65f16b86188e50a14c0853c2d395052d78ec2e6d3be4b13bddcc7d3fac24
Threat Level: Likely malicious
The file 692ce1f8cb6f66d46bf5196bada8e8f0_NEAS was found to be: Likely malicious.
Malicious Activity Summary
Blocklisted process makes network request
Reads user/profile data of web browsers
Deletes itself
Executes dropped EXE
Loads dropped DLL
Enumerates connected drives
Adds Run key to start application
Writes to the Master Boot Record (MBR)
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Checks processor information in registry
Runs ping.exe
Suspicious use of SetWindowsHookEx
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-07 04:41
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-07 04:41
Reported
2024-05-07 04:44
Platform
win7-20240221-en
Max time kernel
145s
Max time network
145s
Command Line
Signatures
Blocklisted process makes network request
| 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\rundll32.exe | N/A |
| N/A | N/A | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\qckno.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\qckno.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\rundll32.exe | N/A |
| N/A | N/A | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Reads user/profile data of web browsers
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\zodzf\\hrpjlyy.dll\",init" | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\g: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\k: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\l: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\o: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\s: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\a: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\h: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\i: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\j: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\m: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\n: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\q: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\t: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\v: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\x: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\r: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\u: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\y: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\b: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\e: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\p: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\w: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\z: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PHYSICALDRIVE0 | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Runs ping.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\PING.EXE | N/A |
Suspicious behavior: EnumeratesProcesses
| 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 |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe | N/A |
| N/A | N/A | \??\c:\qckno.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe
"C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&c:\qckno.exe "C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
\??\c:\qckno.exe
c:\qckno.exe "C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\zodzf\hrpjlyy.dll",init c:\qckno.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 107.163.241.232:12354 | tcp | |
| US | 107.163.241.232:12354 | tcp | |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 107.163.241.232:12354 | tcp | |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 107.163.241.232:12354 | tcp | |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
Files
memory/756-0-0x0000000000400000-0x0000000000425000-memory.dmp
memory/756-1-0x0000000000320000-0x0000000000321000-memory.dmp
memory/756-3-0x0000000000400000-0x0000000000425000-memory.dmp
\??\c:\qckno.exe
| MD5 | f1d8a4bb28c5a9bd2d35fc52cc18f05c |
| SHA1 | a9036a53fe85f67853bea72d00fefa22227b52e4 |
| SHA256 | cf266154c4c13d36666249231b4035235c344e7b08ecd128f97f06d8e8c372d6 |
| SHA512 | f68d7f5312769f3b20696895025eac8a056e80d661cbd215e8a9cde529a37d99f66891e3e0336ea8369b384ea92f24655a7d04552982b6ed816d96cec276c49e |
memory/1648-8-0x0000000000400000-0x0000000000425000-memory.dmp
memory/2356-7-0x0000000000400000-0x0000000000425000-memory.dmp
memory/2356-6-0x0000000000400000-0x0000000000425000-memory.dmp
memory/1648-9-0x0000000000270000-0x0000000000271000-memory.dmp
memory/1648-11-0x0000000000400000-0x0000000000425000-memory.dmp
\??\c:\zodzf\hrpjlyy.dll
| MD5 | 36e3fb5964d663272cf1169e1e1ca478 |
| SHA1 | 58115e08b49505bcbbb5c88a28a86222ba18d5d4 |
| SHA256 | c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7 |
| SHA512 | daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442 |
memory/2632-17-0x0000000010000000-0x000000001002E000-memory.dmp
memory/2632-18-0x0000000010000000-0x000000001002E000-memory.dmp
memory/2632-19-0x0000000010000000-0x000000001002E000-memory.dmp
memory/2632-20-0x0000000010021000-0x0000000010022000-memory.dmp
memory/2632-21-0x0000000010000000-0x000000001002E000-memory.dmp
memory/2632-22-0x0000000010000000-0x000000001002E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-07 04:41
Reported
2024-05-07 04:44
Platform
win10v2004-20240419-en
Max time kernel
147s
Max time network
148s
Command Line
Signatures
Blocklisted process makes network request
| 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\rundll32.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\cntfown.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\cntfown.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Reads user/profile data of web browsers
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3726321484-1950364574-433157660-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\pykvujh\\yvfoca.dll\",init" | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\b: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\i: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\j: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\s: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\w: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\z: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\k: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\l: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\m: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\n: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\r: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\u: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\a: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\e: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\g: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\o: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\t: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\v: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\y: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\h: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\p: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\q: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\x: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PHYSICALDRIVE0 | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Runs ping.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\PING.EXE | N/A |
Suspicious behavior: EnumeratesProcesses
| 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\rundll32.exe | N/A |
| N/A | N/A | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe | N/A |
| N/A | N/A | \??\c:\cntfown.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe
"C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&c:\cntfown.exe "C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
\??\c:\cntfown.exe
c:\cntfown.exe "C:\Users\Admin\AppData\Local\Temp\692ce1f8cb6f66d46bf5196bada8e8f0_NEAS.exe"
\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\pykvujh\yvfoca.dll",init c:\cntfown.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| NL | 23.62.61.97:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 71.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 107.163.241.232:12354 | tcp | |
| US | 107.163.241.232:12354 | tcp | |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 107.163.241.232:12354 | tcp | |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.251.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | 14.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
| US | 8.8.8.8:53 | krnaver.com | udp |
Files
memory/3116-0-0x0000000000400000-0x0000000000425000-memory.dmp
memory/3116-1-0x00000000005D0000-0x00000000005D1000-memory.dmp
memory/3116-3-0x0000000000400000-0x0000000000425000-memory.dmp
C:\cntfown.exe
| MD5 | 338db61147fb5eb25b1bff03dda3f919 |
| SHA1 | a275b42c2f1923c0388df4e4b06efa134beab299 |
| SHA256 | a026d87923f616312faf43728146907f1cab658dc1f9ac9b417b6dd59fd163c2 |
| SHA512 | 624de74e23d4ef0fd67453ffd15470081d4e6b7a37638ee91f7092ea5171305fe2acc30c1849d4da129d280648a60f7be017faa3f5658e8d6dd324fc5aebf8a9 |
memory/4384-8-0x0000000000A40000-0x0000000000A41000-memory.dmp
memory/4384-7-0x0000000000400000-0x0000000000425000-memory.dmp
memory/4384-10-0x0000000000400000-0x0000000000425000-memory.dmp
\??\c:\pykvujh\yvfoca.dll
| MD5 | 36e3fb5964d663272cf1169e1e1ca478 |
| SHA1 | 58115e08b49505bcbbb5c88a28a86222ba18d5d4 |
| SHA256 | c7c41689de030df0f78f471422fa2a6383b36e77c94e7f6f124a96feb3e27ed7 |
| SHA512 | daff53b11aa400437a06287707a334a09661c1ef7d0fd8beaf1a874c79c16fe45bd1188343d0623e839d3ead5ea2dd90896e37ccf3b252c7220c74989a9ba442 |
memory/2848-13-0x0000000010000000-0x000000001002E000-memory.dmp
memory/2848-14-0x0000000010000000-0x000000001002E000-memory.dmp
memory/2848-15-0x0000000002880000-0x0000000002980000-memory.dmp
memory/2848-16-0x0000000010000000-0x000000001002E000-memory.dmp
memory/2848-17-0x0000000002880000-0x0000000002980000-memory.dmp