Analysis Overview
SHA256
8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1
Threat Level: Likely malicious
The file 8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1 was found to be: Likely malicious.
Malicious Activity Summary
UPX dump on OEP (original entry point)
Detects executables containing base64 encoded User Agent
Reads user/profile data of web browsers
UPX packed file
Deletes itself
Loads dropped DLL
Executes dropped EXE
Enumerates connected drives
Adds Run key to start application
Writes to the Master Boot Record (MBR)
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
2024-04-07 23:11
Signatures
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-07 23:11
Reported
2024-04-07 23:14
Platform
win7-20240221-en
Max time kernel
144s
Max time network
151s
Command Line
Signatures
Detects executables containing base64 encoded User Agent
| 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 |
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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\asamj.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\asamj.exe | N/A |
| N/A | N/A | \??\c:\Program Files\xwevo\rzuwmuog.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:\Users\Admin\AppData\Local\Temp\asamj.exe | N/A |
| N/A | N/A | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
| N/A | N/A | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
| N/A | N/A | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
| N/A | N/A | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
Reads user/profile data of web browsers
UPX packed file
| 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 |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\xwevo\\rzuwmuog.exe \"c:\\Program Files\\xwevo\\rzuwmuog.dll\",Compliance" | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
Enumerates connected drives
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PHYSICALDRIVE0 | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | \??\c:\Program Files\xwevo\rzuwmuog.dll | C:\Users\Admin\AppData\Local\Temp\asamj.exe | N/A |
| File created | \??\c:\Program Files\xwevo\rzuwmuog.exe | C:\Users\Admin\AppData\Local\Temp\asamj.exe | N/A |
| File opened for modification | \??\c:\Program Files\xwevo\rzuwmuog.exe | C:\Users\Admin\AppData\Local\Temp\asamj.exe | N/A |
| File opened for modification | \??\c:\Program Files\xwevo | C:\Users\Admin\AppData\Local\Temp\asamj.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | \??\c:\Program Files\xwevo\rzuwmuog.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:\Program Files\xwevo\rzuwmuog.exe | N/A |
| N/A | N/A | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | \??\c:\Program Files\xwevo\rzuwmuog.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\asamj.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe
"C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\asamj.exe "C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"
C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
C:\Users\Admin\AppData\Local\Temp\asamj.exe
C:\Users\Admin\AppData\Local\Temp\\asamj.exe "C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"
\??\c:\Program Files\xwevo\rzuwmuog.exe
"c:\Program Files\xwevo\rzuwmuog.exe" "c:\Program Files\xwevo\rzuwmuog.dll",Compliance C:\Users\Admin\AppData\Local\Temp\asamj.exe
Network
| Country | Destination | Domain | Proto |
| US | 107.163.241.181:16300 | tcp | |
| US | 107.163.43.144:12388 | 107.163.43.144 | tcp |
| US | 107.163.241.181:16300 | tcp | |
| US | 107.163.241.193:6520 | tcp | |
| US | 107.163.241.182:12354 | tcp | |
| US | 107.163.241.182:12354 | tcp | |
| US | 107.163.241.182:12354 | tcp | |
| US | 107.163.241.182:12354 | tcp | |
| US | 107.163.241.193:6520 | tcp | |
| US | 107.163.241.193:6520 | tcp | |
| US | 107.163.241.193:6520 | tcp |
Files
memory/2960-0-0x0000000000400000-0x0000000000469000-memory.dmp
memory/2960-2-0x0000000000400000-0x0000000000469000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\asamj.exe
| MD5 | 46801bc54a7269e17f772498e9c4064c |
| SHA1 | e276be41e53f4d45fc67583cc0e374990892602b |
| SHA256 | 50327d800411ec6d8b0d1eba8fdadafff70623d36c19ac9977b2e3da77210fe7 |
| SHA512 | e623816353c79b42e0db66b0f3611dc1d858c7e904c6c1c71969e27c32667f47889098d8fdbb6e327dcab2fea36d6635d68d829ddf32cfc7ea48a436fd68f1b9 |
memory/2044-5-0x0000000000290000-0x00000000002F9000-memory.dmp
\Program Files\xwevo\rzuwmuog.exe
| MD5 | 51138beea3e2c21ec44d0932c71762a8 |
| SHA1 | 8939cf35447b22dd2c6e6f443446acc1bf986d58 |
| SHA256 | 5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124 |
| SHA512 | 794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d |
memory/2620-13-0x0000000000400000-0x0000000000469000-memory.dmp
\??\c:\Program Files\xwevo\rzuwmuog.dll
| MD5 | b3aaa16bffc7dfbc95c5fc04daac53af |
| SHA1 | 50c2b94ad4b9ee5c0c8b9994f2388f1efec0fc81 |
| SHA256 | e9fa5991fd0b30a8eb468b364926c3c3f73b20eca53b0b0a6870b938bed596e3 |
| SHA512 | 29ff308db09b33c1398c19d1f92fde491c160c5d10ecee22162f3013718cec494915fd61a0414b723c4e830aec5b6d0a3d09809a546fe534bf729e9437f5a9a5 |
memory/2540-21-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2540-22-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2540-23-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2540-24-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2540-28-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2540-36-0x0000000010000000-0x000000001004E000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-07 23:11
Reported
2024-04-07 23:14
Platform
win10v2004-20240226-en
Max time kernel
147s
Max time network
155s
Command Line
Signatures
Detects executables containing base64 encoded User Agent
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
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 |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\tknkl.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\tknkl.exe | N/A |
| N/A | N/A | \??\c:\Program Files\btbzw\aqd.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | \??\c:\Program Files\btbzw\aqd.exe | N/A |
Reads user/profile data of web browsers
UPX packed file
| 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 |
| N/A | N/A | N/A | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Depend = "c:\\Program Files\\btbzw\\aqd.exe \"c:\\Program Files\\btbzw\\aqdzp.dll\",Compliance" | \??\c:\Program Files\btbzw\aqd.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\b: | \??\c:\Program Files\btbzw\aqd.exe | N/A |
| File opened (read-only) | \??\a: | \??\c:\Program Files\btbzw\aqd.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PHYSICALDRIVE0 | \??\c:\Program Files\btbzw\aqd.exe | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File opened for modification | \??\c:\Program Files\btbzw | C:\Users\Admin\AppData\Local\Temp\tknkl.exe | N/A |
| File created | \??\c:\Program Files\btbzw\aqdzp.dll | C:\Users\Admin\AppData\Local\Temp\tknkl.exe | N/A |
| File created | \??\c:\Program Files\btbzw\aqd.exe | C:\Users\Admin\AppData\Local\Temp\tknkl.exe | N/A |
| File opened for modification | \??\c:\Program Files\btbzw\aqd.exe | C:\Users\Admin\AppData\Local\Temp\tknkl.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | \??\c:\Program Files\btbzw\aqd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | \??\c:\Program Files\btbzw\aqd.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:\Program Files\btbzw\aqd.exe | N/A |
| N/A | N/A | \??\c:\Program Files\btbzw\aqd.exe | N/A |
| N/A | N/A | \??\c:\Program Files\btbzw\aqd.exe | N/A |
| N/A | N/A | \??\c:\Program Files\btbzw\aqd.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | \??\c:\Program Files\btbzw\aqd.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\tknkl.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe
"C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"
C:\Windows\SysWOW64\cmd.exe
cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\tknkl.exe "C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"
C:\Windows\SysWOW64\PING.EXE
ping 127.0.0.1 -n 2
C:\Users\Admin\AppData\Local\Temp\tknkl.exe
C:\Users\Admin\AppData\Local\Temp\\tknkl.exe "C:\Users\Admin\AppData\Local\Temp\8bcf0943abd7860c3d5790969643cfb62da770db1c45bccdf69a71f6cfbc61c1.exe"
\??\c:\Program Files\btbzw\aqd.exe
"c:\Program Files\btbzw\aqd.exe" "c:\Program Files\btbzw\aqdzp.dll",Compliance C:\Users\Admin\AppData\Local\Temp\tknkl.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | udp |
| US | 107.163.241.181:16300 | tcp | |
| US | 107.163.43.144:12388 | tcp | |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 107.163.241.193:6520 | tcp | |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 107.163.241.182:12354 | tcp | |
| US | 107.163.241.182:12354 | tcp | |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 107.163.241.182:12354 | tcp | |
| US | 107.163.241.193:6520 | tcp | |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 107.163.241.193:6520 | tcp | |
| US | 8.8.8.8:53 | 21.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 107.163.241.193:6520 | tcp | |
| US | 8.8.8.8:53 | 210.143.182.52.in-addr.arpa | udp |
Files
memory/1296-0-0x0000000000400000-0x0000000000469000-memory.dmp
memory/1296-2-0x0000000000400000-0x0000000000469000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tknkl.exe
| MD5 | d2b0c50d5c59811e2e981d67c3a7ca6e |
| SHA1 | 21c82947de3f1a7114c5052e7f3e5f9f54b4bec6 |
| SHA256 | dd485b2001e0570f0019f3509cad809046f458cb4eaccb9fdbfea76721bd299b |
| SHA512 | 8a9f9977eb79bb33ce722ef1e098313defd1f33fbc594e494a4d4ceef13d10f99d2cbd331f64dc3edafd75e0c93627a46d1cc85664771849704c0bf8d1f8ad20 |
C:\Program Files\btbzw\aqd.exe
| MD5 | 889b99c52a60dd49227c5e485a016679 |
| SHA1 | 8fa889e456aa646a4d0a4349977430ce5fa5e2d7 |
| SHA256 | 6cbe0e1f046b13b29bfa26f8b368281d2dda7eb9b718651d5856f22cc3e02910 |
| SHA512 | 08933106eaf338dd119c45cbf1f83e723aff77cc0f8d3fc84e36253b1eb31557a54211d1d5d1cb58958188e32064d451f6c66a24b3963cccd3de07299ab90641 |
memory/3200-10-0x0000000000400000-0x0000000000469000-memory.dmp
\??\c:\Program Files\btbzw\aqdzp.dll
| MD5 | d45f9efa3c3875e9823909e709f92129 |
| SHA1 | bc023e74365b6dbf10f64b48bc8f98871e76d701 |
| SHA256 | e51cc7aaa0c3a52caa2508fddc217a156445b32a87899e89f0c7e96a4d62aedc |
| SHA512 | 8d1d33704cfcabdf4335ead94faf22b75db8f957b94c2c00d201a0f240af65f1261c9c1a5ced8e537ab7e9f4aa5cc466c5d2d9cf09f200b390f117b46f0f23e2 |
memory/2224-14-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2224-15-0x0000000010000000-0x000000001004E000-memory.dmp
memory/2224-17-0x0000000010000000-0x000000001004E000-memory.dmp