Analysis Overview
SHA256
b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d
Threat Level: Shows suspicious behavior
The file b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d was found to be: Shows suspicious behavior.
Malicious Activity Summary
Executes dropped EXE
Loads dropped DLL
Modifies system executable filetype association
Drops file in System32 directory
Drops file in Windows directory
Unsigned PE
System Location Discovery: System Language Discovery
Modifies registry class
Suspicious use of SetWindowsHookEx
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-10 01:33
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-10 01:33
Reported
2024-11-10 01:35
Platform
win7-20240903-en
Max time kernel
149s
Max time network
120s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\system\rundll32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1731202408" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506" | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1731202408" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe
"C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe"
C:\Windows\system\rundll32.exe
C:\Windows\system\rundll32.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | www.zigui.org | udp |
| HK | 103.251.237.123:80 | www.zigui.org | tcp |
Files
memory/2336-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | 7f068b0ae2814962e9c09ee92fe35d19 |
| SHA1 | 42c1c6c8e9c8611638b14f6dd1329db578731763 |
| SHA256 | 6c0cf95e7427f1dca2cd36ee95dd8df7684b6ac490a4c370146a447f39542285 |
| SHA512 | 3c5a8c44b5f2a68a492dbd2df9f6304c9190f6fc427347f9f50a537ef7abbad1fe704391cfbe567c1c7feaffce51cecafc6d04d6b12f9efe97c017c410249c00 |
\Windows\system\rundll32.exe
| MD5 | 422b2574a6fec8b4d41ea5f21e7dc0f5 |
| SHA1 | a43a65504c640e7231c317d01d4b433d1d6dbf17 |
| SHA256 | 8bf869d2dcc174cf29d285a13e6d3fd0e04ea759e855b1f5997d9ec1c9204db9 |
| SHA512 | ecc9a86038ef71b6350cb1fe32ff8abc617b6041445c4998a0c3991c990649a40ad658ca304d0e65b5a1599ebbc0a3c78c18ec8f70a2a888f1a0f7cc3a438329 |
memory/2336-17-0x00000000002E0000-0x00000000002F6000-memory.dmp
memory/2336-12-0x00000000002E0000-0x00000000002F6000-memory.dmp
memory/2336-20-0x0000000000400000-0x0000000000415A00-memory.dmp
memory/2336-21-0x00000000002E0000-0x00000000002F6000-memory.dmp
memory/1544-22-0x0000000000400000-0x0000000000415A00-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-11-10 01:33
Reported
2024-11-10 01:35
Platform
win10v2004-20241007-en
Max time kernel
149s
Max time network
137s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Modifies system executable filetype association
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| File created | C:\Windows\SysWOW64\¢«.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| File created | C:\Windows\SysWOW64\notepad¢¬.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| File opened for modification | C:\Windows\system\rundll32.exe | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\system\rundll32.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad.exe %1" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\exefile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\txtfile\shell\open\command | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "\"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainSetup = "1731202409" | C:\Windows\system\rundll32.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainVer = "506" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Set value (int) | \REGISTRY\MACHINE\SOFTWARE\Classes\MSipv\MainUp = "1731202409" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\txtfile\shell\open\command\ = "notepad¢¬ %1" | C:\Windows\system\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "¢« \"%1\" %*" | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| Key created | \REGISTRY\MACHINE\Software\Classes\MSipv | C:\Windows\system\rundll32.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
| N/A | N/A | C:\Windows\system\rundll32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2624 wrote to memory of 4932 | N/A | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | C:\Windows\system\rundll32.exe |
| PID 2624 wrote to memory of 4932 | N/A | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | C:\Windows\system\rundll32.exe |
| PID 2624 wrote to memory of 4932 | N/A | C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe | C:\Windows\system\rundll32.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe
"C:\Users\Admin\AppData\Local\Temp\b58e07f57d344f1f7d29022d9513e9cf12d7ac05dfdea961858fa0f876a83d9d.exe"
C:\Windows\system\rundll32.exe
C:\Windows\system\rundll32.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.zigui.org | udp |
| HK | 103.251.237.123:80 | www.zigui.org | tcp |
| US | 8.8.8.8:53 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 123.237.251.103.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.163.245.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 98.117.19.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 107.209.201.84.in-addr.arpa | udp |
Files
memory/2624-0-0x0000000000400000-0x0000000000415A00-memory.dmp
C:\Windows\SysWOW64\notepad¢¬.exe
| MD5 | d0a1c08fdf8691c8d8ee76c7b4a3bc53 |
| SHA1 | 9616766843e777b56a8ecbb4ca73ce6036387d24 |
| SHA256 | 9ae68141bd0f4529c46f39143700e92d532296d101d09bbce1811f5ef34aa5ea |
| SHA512 | b33173ad1a35e0e03a317d64c9e9c29732e2faa552e8c9d29b8675a3e19d169ecbe4ab6258b441c31ee0e296446a6e39f707b9357c839015a2be268e3f67c6cc |
C:\Windows\System\rundll32.exe
| MD5 | 76fbfa25e65c6c96f50accd809a92a05 |
| SHA1 | 292be30fa03409cb01952793d293c0385f5588b9 |
| SHA256 | aa90417e670664385c5338b8da56eb6b06eb1b505f9823c33165d357f11a0239 |
| SHA512 | 912b3b36d532d480904cb31a03df09456573aa3ee206bd29784da229473d5bb051e42548d9caa9960c425964425cf950ae085701bed11578ea6c86d86ac329c6 |
memory/2624-13-0x0000000000400000-0x0000000000415A00-memory.dmp
memory/4932-14-0x0000000000400000-0x0000000000415A00-memory.dmp