Analysis Overview
SHA256
3fd4fb0b21f1d754bd0a1457c76d194a5723e21900bfe6aef75c376079391e98
Threat Level: Known bad
The file wymuq1.cab was found to be: Known bad.
Malicious Activity Summary
Valak
Valak JavaScript Loader
JavaScript code in executable
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2020-10-07 21:16
Signatures
JavaScript code in executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2020-10-07 21:16
Reported
2020-10-07 21:18
Platform
win7
Max time kernel
128s
Max time network
16s
Command Line
Signatures
Valak
Valak JavaScript Loader
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
JavaScript code in executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\wymuq1.cab.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\wymuq1.cab.dll,#1
C:\Windows\SysWOW64\wscript.exe
wscript.exe //E:jscript "C:\Users\Public\IdfscyvPV.N_Dya
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
Network
Files
memory/276-0-0x0000000000000000-mapping.dmp
memory/768-1-0x0000000000000000-mapping.dmp
C:\Users\Public\IdfscyvPV.N_Dya
| MD5 | fd0af86fd3e8a72fd440e93083aa089a |
| SHA1 | 0b3cd092f3e9f0aed4cbd43b9794d90507f1522f |
| SHA256 | af1077125ad15df0edbdb95f478547e37ba34854509f8f3ac9c7576ab4728884 |
| SHA512 | 45922109013ad3c9d962946608e442e2d33c60f9d2c2d047f5e2942fbac1f48946002ee659da1afffcee06650c7d09fe81dd632ae134d53c87da11f7119a7fd7 |
memory/768-3-0x00000000028A0000-0x00000000028A4000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2020-10-07 21:16
Reported
2020-10-07 21:18
Platform
win10
Max time kernel
123s
Max time network
153s
Command Line
Signatures
Valak
Valak JavaScript Loader
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
JavaScript code in executable
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3024 wrote to memory of 3780 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3024 wrote to memory of 3780 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3024 wrote to memory of 3780 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 3780 wrote to memory of 744 | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Windows\SysWOW64\wscript.exe |
| PID 3780 wrote to memory of 744 | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Windows\SysWOW64\wscript.exe |
| PID 3780 wrote to memory of 744 | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Windows\SysWOW64\wscript.exe |
Processes
C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\wymuq1.cab.dll,#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\wymuq1.cab.dll,#1
C:\Windows\SysWOW64\wscript.exe
wscript.exe //E:jscript "C:\Users\Public\IdfscyvPV.N_Dya
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
Network
| Country | Destination | Domain | Proto |
| N/A | 52.109.12.18:443 | tcp |
Files
memory/3780-0-0x0000000000000000-mapping.dmp
memory/744-1-0x0000000000000000-mapping.dmp
C:\Users\Public\IdfscyvPV.N_Dya
| MD5 | fd0af86fd3e8a72fd440e93083aa089a |
| SHA1 | 0b3cd092f3e9f0aed4cbd43b9794d90507f1522f |
| SHA256 | af1077125ad15df0edbdb95f478547e37ba34854509f8f3ac9c7576ab4728884 |
| SHA512 | 45922109013ad3c9d962946608e442e2d33c60f9d2c2d047f5e2942fbac1f48946002ee659da1afffcee06650c7d09fe81dd632ae134d53c87da11f7119a7fd7 |