Analysis Overview
SHA256
b5a1a2fbb4786f68248ba11b8780b8c8294ed881fed3c362c54b0560e1cb2018
Threat Level: Known bad
The file b3344d57c132a4ea95c92fd21c597590 was found to be: Known bad.
Malicious Activity Summary
Oski
Reads user/profile data of web browsers
Checks computer location settings
Suspicious use of SetThreadContext
Program crash
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-20 12:35
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-20 12:35
Reported
2023-12-20 12:46
Platform
win7-20231215-en
Max time kernel
122s
Max time network
125s
Command Line
Signatures
Oski
Reads user/profile data of web browsers
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 2896 set thread context of 3060 | N/A | C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe | C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"
C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YajFFkFQFAik" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA5D.tmp"
C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3060 -s 868
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | robbmaterials.xyz | udp |
Files
memory/2896-1-0x0000000074E30000-0x000000007551E000-memory.dmp
memory/2896-0-0x0000000000960000-0x00000000009D4000-memory.dmp
memory/2896-2-0x00000000049F0000-0x0000000004A30000-memory.dmp
memory/2896-3-0x0000000000640000-0x0000000000652000-memory.dmp
memory/2896-4-0x0000000074E30000-0x000000007551E000-memory.dmp
memory/2896-5-0x00000000049F0000-0x0000000004A30000-memory.dmp
memory/2896-6-0x00000000050C0000-0x000000000511C000-memory.dmp
memory/3060-12-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3060-13-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3060-14-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3060-16-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3060-15-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3060-17-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
memory/3060-19-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2896-22-0x0000000074E30000-0x000000007551E000-memory.dmp
memory/3060-21-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3060-23-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3060-25-0x0000000000400000-0x0000000000438000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-20 12:35
Reported
2023-12-20 12:47
Platform
win10v2004-20231215-en
Max time kernel
149s
Max time network
155s
Command Line
Signatures
Oski
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-983843758-932321429-1636175382-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe | N/A |
Reads user/profile data of web browsers
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 3316 set thread context of 3152 | N/A | C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe | C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe |
Enumerates physical storage devices
Program crash
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WerFault.exe | C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe |
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"
C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YajFFkFQFAik" /XML "C:\Users\Admin\AppData\Local\Temp\tmpFF6E.tmp"
C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe
"C:\Users\Admin\AppData\Local\Temp\b3344d57c132a4ea95c92fd21c597590.exe"
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 204 -p 3152 -ip 3152
C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3152 -s 1300
Network
| Country | Destination | Domain | Proto |
| NL | 52.142.223.178:80 | tcp | |
| US | 8.8.8.8:53 | 20.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 204.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| 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 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 79.121.231.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | robbmaterials.xyz | udp |
| US | 8.8.8.8:53 | 23.236.111.52.in-addr.arpa | udp |
Files
memory/3316-0-0x00000000009F0000-0x0000000000A64000-memory.dmp
memory/3316-1-0x0000000074DD0000-0x0000000075580000-memory.dmp
memory/3316-2-0x0000000005AA0000-0x0000000006044000-memory.dmp
memory/3316-3-0x00000000054F0000-0x0000000005582000-memory.dmp
memory/3316-4-0x0000000005700000-0x0000000005710000-memory.dmp
memory/3316-5-0x0000000005460000-0x000000000546A000-memory.dmp
memory/3316-6-0x00000000057B0000-0x000000000584C000-memory.dmp
memory/3316-7-0x00000000054C0000-0x00000000054D2000-memory.dmp
memory/3316-8-0x0000000074DD0000-0x0000000075580000-memory.dmp
memory/3316-9-0x0000000005700000-0x0000000005710000-memory.dmp
memory/3316-10-0x00000000063A0000-0x00000000063FC000-memory.dmp
memory/3152-16-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3152-17-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3152-19-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3316-20-0x0000000074DD0000-0x0000000075580000-memory.dmp
memory/3152-21-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3152-24-0x0000000000400000-0x0000000000438000-memory.dmp