Analysis Overview
SHA256
c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b
Threat Level: Likely malicious
The file c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b was found to be: Likely malicious.
Malicious Activity Summary
Blocklisted process makes network request
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Executes dropped EXE
Enumerates connected drives
Adds Run key to start application
Writes to the Master Boot Record (MBR)
Suspicious use of NtSetInformationThreadHideFromDebugger
Drops file in Program Files directory
Unsigned PE
Suspicious use of SetWindowsHookEx
Suspicious use of AdjustPrivilegeToken
Checks processor information in registry
Runs ping.exe
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-11 15:33
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-11 15:33
Reported
2024-06-11 15:36
Platform
win7-20240508-en
Max time kernel
149s
Max time network
150s
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 |
| 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 |
| 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:\Users\Admin\AppData\Local\Temp\rvrpy.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\rvrpy.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\cmd.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 |
| 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-1-5-21-3691908287-3775019229-3534252667-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\suokosf\\pwkump.dll\",Verify" | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\e: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\i: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\n: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\p: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\u: | \??\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) | \??\m: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\q: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\s: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\v: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\a: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\w: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\x: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\b: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\g: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\h: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\j: | \??\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) | \??\r: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\t: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\y: | \??\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 |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | \??\c:\Program Files\suokosf\pwkump.dll | C:\Users\Admin\AppData\Local\Temp\rvrpy.exe | N/A |
| File opened for modification | \??\c:\Program Files\suokosf | C:\Users\Admin\AppData\Local\Temp\rvrpy.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
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\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\rvrpy.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe
"C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\rvrpy.exe "C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"
C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
C:\Users\Admin\AppData\Local\Temp\rvrpy.exe
C:\Users\Admin\AppData\Local\Temp\\rvrpy.exe "C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"
\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\Program Files\suokosf\pwkump.dll",Verify C:\Users\Admin\AppData\Local\Temp\rvrpy.exe
Network
| Country | Destination | Domain | Proto |
| US | 110.34.196.36:803 | tcp | |
| US | 110.34.196.36:803 | tcp | |
| US | 110.34.196.34:3204 | tcp | |
| US | 110.34.196.35:805 | tcp | |
| US | 110.34.196.35:805 | tcp | |
| US | 110.34.196.35:805 | tcp | |
| US | 110.34.196.35:805 | tcp | |
| US | 110.34.196.34:3204 | tcp | |
| US | 110.34.196.34:3204 | tcp | |
| US | 110.34.196.34:3204 | tcp |
Files
memory/2268-0-0x0000000000400000-0x0000000000464000-memory.dmp
memory/2268-2-0x0000000000400000-0x0000000000464000-memory.dmp
\Users\Admin\AppData\Local\Temp\rvrpy.exe
| MD5 | 88f195539b47b92fa635a851e1d388ae |
| SHA1 | 3a1022fc35a0fba1f10880b584574f395c4498ee |
| SHA256 | 07c75089343963b3f20fd8a3527abd8d0c71e621f8c3e6f3ee96e6ea479ca0e4 |
| SHA512 | 36508fa8dcbd5ff75236b8894223962e53a8299fcd0d57edf251115cb69692c976b1c0dd75fc9394d579f9b8bf856126928c77d16c1e999ee27ae77beaff3b3d |
memory/2204-7-0x0000000000370000-0x00000000003D4000-memory.dmp
memory/2204-6-0x0000000000370000-0x00000000003D4000-memory.dmp
memory/2132-10-0x0000000000400000-0x0000000000464000-memory.dmp
\??\c:\Program Files\suokosf\pwkump.dll
| MD5 | 9858ab4844a6547f7aca1733096be9ed |
| SHA1 | a4f32181a212c09a6bc44e2a6d6f27cc489f4f75 |
| SHA256 | f4b32b38592b0b2de79378e165cebdcfae567365a44edd6c90803634ad095a22 |
| SHA512 | a10da986c104308f789c91da5e5f89b70b448b7893ad7ce9b378e5c7d22fd3e23aed23528bdc4fcf56fd7b1494353e86ec56d8d5bc3dadad887b5d23db7cad06 |
memory/2660-16-0x0000000010000000-0x0000000010080000-memory.dmp
memory/2660-17-0x0000000010000000-0x0000000010080000-memory.dmp
memory/2660-19-0x0000000010000000-0x0000000010080000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-11 15:33
Reported
2024-06-11 15:36
Platform
win10v2004-20240508-en
Max time kernel
149s
Max time network
151s
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 |
| 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:\Users\Admin\AppData\Local\Temp\wbbxn.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\wbbxn.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-1-5-21-4124900551-4068476067-3491212533-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Dotx = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\Program Files\\azitmh\\ymxte.dll\",Verify" | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\y: | \??\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) | \??\w: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\r: | \??\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) | \??\e: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\i: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\n: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\p: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\h: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\j: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\o: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\m: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\q: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\s: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\t: | \??\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) | \??\b: | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
| File opened (read-only) | \??\g: | \??\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 |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\windows\SysWOW64\rundll32.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | \??\c:\Program Files\azitmh | C:\Users\Admin\AppData\Local\Temp\wbbxn.exe | N/A |
| File created | \??\c:\Program Files\azitmh\ymxte.dll | C:\Users\Admin\AppData\Local\Temp\wbbxn.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
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\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\wbbxn.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe
"C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\wbbxn.exe "C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"
C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
C:\Users\Admin\AppData\Local\Temp\wbbxn.exe
C:\Users\Admin\AppData\Local\Temp\\wbbxn.exe "C:\Users\Admin\AppData\Local\Temp\c000a71356f868de34b6a50dfb5bd5f79f71006171645fc8984b100aa373ab0b.exe"
\??\c:\windows\SysWOW64\rundll32.exe
c:\windows\system32\rundll32.exe "c:\Program Files\azitmh\ymxte.dll",Verify C:\Users\Admin\AppData\Local\Temp\wbbxn.exe
Network
| Country | Destination | Domain | Proto |
| US | 110.34.196.36:803 | tcp | |
| US | 110.34.196.34:3204 | tcp | |
| US | 110.34.196.35:805 | tcp | |
| US | 110.34.196.35:805 | tcp | |
| US | 110.34.196.35:805 | tcp | |
| US | 110.34.196.34:3204 | tcp | |
| US | 52.111.229.48:443 | tcp | |
| US | 110.34.196.34:3204 | tcp | |
| US | 110.34.196.34:3204 | tcp |
Files
memory/1780-0-0x0000000000400000-0x0000000000464000-memory.dmp
memory/1780-2-0x0000000000400000-0x0000000000464000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\wbbxn.exe
| MD5 | bed3a3ed7cb17bb55c8a5e91baba3ed9 |
| SHA1 | 2ad7a9805f77a771b8b9f744b63318244919dcbd |
| SHA256 | 03edb86c05274d600222036585d2461ec6b7f1561006808e6f973c47446a9683 |
| SHA512 | 56532cab5bcfd341861ea8e823bd4930f8e846dfd3ad30a4e8428414acd0479151459ec1359174dd852d2886c0571a79bf4ee4ca1d2835a796b30a1ee0397813 |
memory/1580-6-0x0000000000400000-0x0000000000464000-memory.dmp
memory/1580-8-0x0000000000400000-0x0000000000464000-memory.dmp
\??\c:\Program Files\azitmh\ymxte.dll
| MD5 | 17fb87ef8557e8d7e1521a158fa08c51 |
| SHA1 | 1b0f1e567f06d63df4c65aa3abb5689acdbf7923 |
| SHA256 | 207042972d469c69dd56ee83fbd90dfb1be3a871dde1128a9620ce1ea6c57eda |
| SHA512 | ca176c450644e78f0866de161b4dd0cffab4bbf822c0268b4b76f95166c31fcd718bf1565b5466e4a809a6f08998ce41c3c4a8786ced45a396d8525427700116 |
memory/2096-11-0x0000000010000000-0x0000000010080000-memory.dmp
memory/2096-13-0x0000000010000000-0x0000000010080000-memory.dmp
memory/2096-14-0x0000000010000000-0x0000000010080000-memory.dmp