Analysis Overview
SHA256
7af3f74a9b98a1c79a73d32c9d63ddb4ba8ae48f707d33547cdebb8b99014a8f
Threat Level: Known bad
The file 7af3f74a9b98a1c79a73d32c9d63ddb4ba8ae48f707d33547cdebb8b99014a8f was found to be: Known bad.
Malicious Activity Summary
Modifies WinLogon for persistence
NanoCore
Loads dropped DLL
Checks computer location settings
Adds Run key to start application
Suspicious use of SetThreadContext
Drops file in Program Files directory
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2022-11-26 23:00
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2022-11-26 23:00
Reported
2022-11-27 16:42
Platform
win7-20221111-en
Max time kernel
240s
Max time network
336s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Users\\Admin\\AppData\\Roaming\\x4c6lpG5\\MGDvRNf.exe,explorer.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
NanoCore
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\DDP Subsystem = "C:\\Program Files (x86)\\DDP Subsystem\\ddpss.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 520 set thread context of 1440 | N/A | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\DDP Subsystem\ddpss.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
| File opened for modification | C:\Program Files (x86)\DDP Subsystem\ddpss.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe
"C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v shell /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\x4c6lpG5\MGDvRNf.exe,explorer.exe"
C:\Windows\SysWOW64\reg.exe
reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v shell /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\x4c6lpG5\MGDvRNf.exe,explorer.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 8.8.8.8:53 | informer.ddns.net | udp |
Files
memory/520-54-0x0000000076D71000-0x0000000076D73000-memory.dmp
memory/520-55-0x0000000074D50000-0x00000000752FB000-memory.dmp
memory/520-56-0x0000000074D50000-0x00000000752FB000-memory.dmp
\Users\Admin\AppData\Roaming\x4c6lpG5\MGDvRNf.exe
| MD5 | 9deae9ea695e8e5fdab35294f848e6b2 |
| SHA1 | 73314c20de4b46a6ddb5c9b224e22c1c20ef0183 |
| SHA256 | 38e14f1ab8dab71a76cbbc260d5c43d41023f2b23e8955f29dc81213454660f2 |
| SHA512 | 89b70646c7789b81c029829a47888b93af8033b92665104e0513446b4ca08fb3e04579480a5d00ef50817104742ff747b20c0b03f9ab82d6c8cf5738bf369d76 |
memory/572-58-0x0000000000000000-mapping.dmp
memory/1788-59-0x0000000000000000-mapping.dmp
memory/1440-60-0x0000000000400000-0x0000000000436000-memory.dmp
memory/1440-61-0x0000000000400000-0x0000000000436000-memory.dmp
memory/1440-64-0x0000000000400000-0x0000000000436000-memory.dmp
memory/1440-63-0x0000000000400000-0x0000000000436000-memory.dmp
memory/1440-67-0x000000000041D8D6-mapping.dmp
memory/1440-66-0x0000000000400000-0x0000000000436000-memory.dmp
memory/1440-69-0x0000000000400000-0x0000000000436000-memory.dmp
memory/1440-71-0x0000000000400000-0x0000000000436000-memory.dmp
memory/520-73-0x0000000074D50000-0x00000000752FB000-memory.dmp
memory/1440-74-0x0000000074D50000-0x00000000752FB000-memory.dmp
memory/1440-75-0x0000000074D50000-0x00000000752FB000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2022-11-26 23:00
Reported
2022-11-27 16:40
Platform
win10v2004-20221111-en
Max time kernel
149s
Max time network
205s
Command Line
Signatures
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "C:\\Users\\Admin\\AppData\\Roaming\\x4c6lpG5\\MGDvRNf.exe,explorer.exe" | C:\Windows\SysWOW64\reg.exe | N/A |
NanoCore
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DSL Manager = "C:\\Program Files (x86)\\DSL Manager\\dslmgr.exe" | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Suspicious use of SetThreadContext
| Description | Indicator | Process | Target |
| PID 4600 set thread context of 4008 | N/A | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\DSL Manager\dslmgr.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
| File opened for modification | C:\Program Files (x86)\DSL Manager\dslmgr.exe | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Enumerates physical storage devices
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe
"C:\Users\Admin\AppData\Local\Temp\IMG_88967569.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v shell /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\x4c6lpG5\MGDvRNf.exe,explorer.exe"
C:\Windows\SysWOW64\reg.exe
reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon" /f /v shell /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\x4c6lpG5\MGDvRNf.exe,explorer.exe"
C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"
Network
| Country | Destination | Domain | Proto |
| N/A | 20.42.65.84:443 | tcp | |
| N/A | 178.79.208.1:80 | tcp | |
| N/A | 178.79.208.1:80 | tcp | |
| N/A | 8.8.8.8:53 | 226.101.242.52.in-addr.arpa | udp |
| N/A | 8.8.8.8:53 | informer.ddns.net | udp |
Files
memory/4600-132-0x0000000074E50000-0x0000000075401000-memory.dmp
memory/4600-133-0x0000000074E50000-0x0000000075401000-memory.dmp
memory/3716-134-0x0000000000000000-mapping.dmp
memory/4424-135-0x0000000000000000-mapping.dmp
memory/4008-136-0x0000000000000000-mapping.dmp
memory/4008-137-0x0000000000400000-0x0000000000436000-memory.dmp
memory/4600-138-0x0000000074E50000-0x0000000075401000-memory.dmp
memory/4008-139-0x0000000074E50000-0x0000000075401000-memory.dmp
memory/4008-140-0x0000000074E50000-0x0000000075401000-memory.dmp