Analysis Overview
SHA256
8c91fcab97a80bc4331131ac99bfc9dc2debe1dde4f5525f7b170fda02f2a7e5
Threat Level: Known bad
The file 497d07be55c7691971ef55c818214601.exe was found to be: Known bad.
Malicious Activity Summary
Adds autorun key to be loaded by Explorer.exe on startup
Loads dropped DLL
Deletes itself
Drops file in System32 directory
Unsigned PE
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-01-07 19:20
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-01-07 19:20
Reported
2024-01-07 19:22
Platform
win7-20231215-en
Max time kernel
119s
Max time network
121s
Command Line
Signatures
Adds autorun key to be loaded by Explorer.exe on startup
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\lweurqhx.dll = "{71A78CD4-E470-4a18-8457-E0E0283DD507}" | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\lweurqhx.tmp | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\lweurqhx.tmp | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\lweurqhx.nls | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ThreadingModel = "Apartment" | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507} | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32 | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ = "C:\\Windows\\SysWow64\\lweurqhx.dll" | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2528 wrote to memory of 2588 | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2528 wrote to memory of 2588 | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2528 wrote to memory of 2588 | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2528 wrote to memory of 2588 | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe
"C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe"
C:\Windows\SysWOW64\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\9DC5.tmp.bat
Network
Files
C:\Windows\SysWOW64\lweurqhx.tmp
| MD5 | d41d8cd98f00b204e9800998ecf8427e |
| SHA1 | da39a3ee5e6b4b0d3255bfef95601890afd80709 |
| SHA256 | e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 |
| SHA512 | cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e |
C:\Windows\SysWOW64\lweurqhx.nls
| MD5 | b002bc9852c2dfb2103f25c632d0519f |
| SHA1 | 684e5464c61d02c4dac8b5d1849fb688a288a675 |
| SHA256 | 7bbc8fb18996628f01b355f28571159e9155d57dfd48ee039b0924e019990497 |
| SHA512 | 64b7aa8aa735fe142f68610a1c154992d59b67b2ffc936a552467d28cfb29c1d49139852b7b540cbfa39e041c9be1bc73d7b929aeed9f7c9d691687bd42d5956 |
memory/2528-16-0x0000000020000000-0x0000000020009000-memory.dmp
memory/2528-25-0x0000000020000000-0x0000000020009000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-01-07 19:20
Reported
2024-01-07 19:23
Platform
win10v2004-20231215-en
Max time kernel
140s
Max time network
147s
Command Line
Signatures
Adds autorun key to be loaded by Explorer.exe on startup
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\lweurqhx.dll = "{71A78CD4-E470-4a18-8457-E0E0283DD507}" | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\SysWOW64\lweurqhx.nls | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| File created | C:\Windows\SysWOW64\lweurqhx.tmp | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| File opened for modification | C:\Windows\SysWOW64\lweurqhx.tmp | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507} | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32 | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ = "C:\\Windows\\SysWow64\\lweurqhx.dll" | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ThreadingModel = "Apartment" | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3204 wrote to memory of 3100 | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3204 wrote to memory of 3100 | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3204 wrote to memory of 3100 | N/A | C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe
"C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe"
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\C5F0.tmp.bat
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 82.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.136.104.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 64.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 138.91.171.81:80 | tcp | |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 146.78.124.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 134.71.91.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 81.171.91.138.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 63.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 58.99.105.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | 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 | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 178.223.142.52.in-addr.arpa | udp |
Files
C:\Windows\SysWOW64\lweurqhx.nls
| MD5 | b002bc9852c2dfb2103f25c632d0519f |
| SHA1 | 684e5464c61d02c4dac8b5d1849fb688a288a675 |
| SHA256 | 7bbc8fb18996628f01b355f28571159e9155d57dfd48ee039b0924e019990497 |
| SHA512 | 64b7aa8aa735fe142f68610a1c154992d59b67b2ffc936a552467d28cfb29c1d49139852b7b540cbfa39e041c9be1bc73d7b929aeed9f7c9d691687bd42d5956 |
C:\Windows\SysWOW64\lweurqhx.dll
| MD5 | 2e2e7c8edc157b8f743b101c5f297aee |
| SHA1 | da26c1ecc164a6d5926eff1ca60e98a38852f9ee |
| SHA256 | bc6956550d3bfcf5e5fbfb4ad1f2cfbd94b5adcdb8014b6c857ac3f65e27559a |
| SHA512 | 958558c6c13417d6c9b0f82cd77c58e659299b1d608b9c635edad71f052e04049a900080fb783e93c94ea21d68fb7566584c271fdc07f6b86597ebb831b5761e |
C:\Windows\SysWOW64\lweurqhx.tmp
| MD5 | 21e3eddfe73b682e779b4f9d030e720c |
| SHA1 | bfa46e5c3852b07e7ecf6aa9006377c2e6adb181 |
| SHA256 | 0ebf803d1770b541986b5dc231f17d33111190e0ac1cea7c17dbd564bf04ddc2 |
| SHA512 | bc6ba85122334e0010cd713af9cdfd7003fbd7e888b8df8490e6b5a56edcdf9118c37c83b8cce0fc028a3c264ad085b6713b4887a71974d7dad38a231d5744a1 |
memory/3204-17-0x0000000020000000-0x0000000020009000-memory.dmp
memory/3204-21-0x0000000020000000-0x0000000020009000-memory.dmp