Analysis Overview
SHA256
d656774897240bb30faada488a1f2fe89a4bb36421bf07cea3accfb83a13efd1
Threat Level: Known bad
The file Valak (4).cab was found to be: Known bad.
Malicious Activity Summary
Valak JavaScript Loader
Valak
JavaScript code in executable
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Analysis: static1
Detonation Overview
Reported
2020-11-09 20:42
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2020-11-09 20:42
Reported
2020-11-10 23:32
Platform
win7v20201028
Max time kernel
50s
Max time network
14s
Command Line
Signatures
Valak
Valak JavaScript Loader
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| 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\Valak (4).cab.dll",#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\Valak (4).cab.dll",#1
C:\Windows\SysWOW64\wscript.exe
wscript.exe //E:jscript "C:\Users\Public\CCGYPWTwr.iySAE
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
Network
Files
memory/1908-0-0x0000000000000000-mapping.dmp
memory/1236-1-0x0000000000000000-mapping.dmp
C:\Users\Public\CCGYPWTwr.iySAE
| MD5 | 6df4cb0a89bdabcf858e7e407e3975f5 |
| SHA1 | f41a9efe9f3cdce394893d90f564bb26e3cdd494 |
| SHA256 | c65b67bfe6a5acf6ebfb7f327a6ce8f93bfe5ec579fe783f611a73ce031f7232 |
| SHA512 | a49817c5b27a75263a57398a17f838e935660d554e6b36d8e11ec20817fd08b532851b527c7255d50556d85e1fa985ed0d766d7103f6178ab8ef8bab561b1a41 |
memory/1236-3-0x0000000002720000-0x0000000002724000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2020-11-09 20:42
Reported
2020-11-10 23:32
Platform
win10v20201028
Max time kernel
134s
Max time network
135s
Command Line
Signatures
Valak
Valak JavaScript Loader
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| 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 492 wrote to memory of 1008 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 492 wrote to memory of 1008 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 492 wrote to memory of 1008 | N/A | C:\Windows\system32\rundll32.exe | C:\Windows\SysWOW64\rundll32.exe |
| PID 1008 wrote to memory of 196 | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Windows\SysWOW64\wscript.exe |
| PID 1008 wrote to memory of 196 | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Windows\SysWOW64\wscript.exe |
| PID 1008 wrote to memory of 196 | 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\Valak (4).cab.dll",#1
C:\Windows\SysWOW64\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\Valak (4).cab.dll",#1
C:\Windows\SysWOW64\wscript.exe
wscript.exe //E:jscript "C:\Users\Public\CCGYPWTwr.iySAE
C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
Network
Files
memory/1008-0-0x0000000000000000-mapping.dmp
memory/196-1-0x0000000000000000-mapping.dmp
C:\Users\Public\CCGYPWTwr.iySAE
| MD5 | 6df4cb0a89bdabcf858e7e407e3975f5 |
| SHA1 | f41a9efe9f3cdce394893d90f564bb26e3cdd494 |
| SHA256 | c65b67bfe6a5acf6ebfb7f327a6ce8f93bfe5ec579fe783f611a73ce031f7232 |
| SHA512 | a49817c5b27a75263a57398a17f838e935660d554e6b36d8e11ec20817fd08b532851b527c7255d50556d85e1fa985ed0d766d7103f6178ab8ef8bab561b1a41 |