Analysis Overview
SHA256
cf1f6eb66912ff5ad30f8940accdb1df9bb2f8f8cdf3f8d45a4febd48c5641b9
Threat Level: Known bad
The file Nursultan.exe was found to be: Known bad.
Malicious Activity Summary
DcRat
Modifies WinLogon for persistence
Process spawned unexpected child process
Dcrat family
DCRat payload
DCRat payload
Checks computer location settings
Loads dropped DLL
Executes dropped EXE
Looks up external IP address via web service
Adds Run key to start application
Drops file in Program Files directory
Drops file in Windows directory
Enumerates physical storage devices
Unsigned PE
Modifies system certificate store
Suspicious behavior: GetForegroundWindowSpam
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Uses Task Scheduler COM API
Suspicious use of WriteProcessMemory
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-03 03:45
Signatures
DCRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Dcrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-03 03:45
Reported
2024-06-03 03:48
Platform
win7-20240221-en
Max time kernel
144s
Max time network
150s
Command Line
Signatures
DcRat
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| File created | C:\Program Files (x86)\Windows Portable Devices\dwm.exe | C:\ProviderInto\blocksurrogate.exe | N/A |
| File created | C:\Program Files (x86)\Windows Portable Devices\6cb0b6c459d5d3 | C:\ProviderInto\blocksurrogate.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Portable Devices\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Portable Devices\\dwm.exe\", \"C:\\Program Files (x86)\\Google\\CrashReports\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Portable Devices\\dwm.exe\", \"C:\\Program Files (x86)\\Google\\CrashReports\\dwm.exe\", \"C:\\Recovery\\ed850442-d104-11ee-9c57-c695cbc44580\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Program Files (x86)\\Windows Portable Devices\\dwm.exe\", \"C:\\Program Files (x86)\\Google\\CrashReports\\dwm.exe\", \"C:\\Recovery\\ed850442-d104-11ee-9c57-c695cbc44580\\dwm.exe\", \"C:\\Recovery\\ed850442-d104-11ee-9c57-c695cbc44580\\wininit.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
Process spawned unexpected child process
| Description | Indicator | Process | Target |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe |
DCRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProviderInto\blocksurrogate.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Program Files (x86)\\Google\\CrashReports\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Program Files (x86)\\Google\\CrashReports\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Recovery\\ed850442-d104-11ee-9c57-c695cbc44580\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Recovery\\ed850442-d104-11ee-9c57-c695cbc44580\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Recovery\\ed850442-d104-11ee-9c57-c695cbc44580\\wininit.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\wininit = "\"C:\\Recovery\\ed850442-d104-11ee-9c57-c695cbc44580\\wininit.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Program Files (x86)\\Windows Portable Devices\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\dwm = "\"C:\\Program Files (x86)\\Windows Portable Devices\\dwm.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | ipinfo.io | N/A | N/A |
| N/A | ipinfo.io | N/A | N/A |
Drops file in Program Files directory
| Description | Indicator | Process | Target |
| File created | C:\Program Files (x86)\Windows Portable Devices\6cb0b6c459d5d3 | C:\ProviderInto\blocksurrogate.exe | N/A |
| File created | C:\Program Files (x86)\Google\CrashReports\dwm.exe | C:\ProviderInto\blocksurrogate.exe | N/A |
| File created | C:\Program Files (x86)\Google\CrashReports\6cb0b6c459d5d3 | C:\ProviderInto\blocksurrogate.exe | N/A |
| File created | C:\Program Files (x86)\Windows Portable Devices\dwm.exe | C:\ProviderInto\blocksurrogate.exe | N/A |
| File opened for modification | C:\Program Files (x86)\Windows Portable Devices\dwm.exe | C:\ProviderInto\blocksurrogate.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Modifies system certificate store
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8 | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| Set value (data) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\ROOT\Certificates\CABD2A79A1076A31F21D253635CB039D4329A5E8\Blob = 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 | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProviderInto\blocksurrogate.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\ProviderInto\blocksurrogate.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Nursultan.exe
"C:\Users\Admin\AppData\Local\Temp\Nursultan.exe"
C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\ProviderInto\bg4vLJUaDkf5tC.vbe"
C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\ProviderInto\NmoUHUSCIv.bat" "
C:\ProviderInto\blocksurrogate.exe
"C:\ProviderInto\blocksurrogate.exe"
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 13 /tr "'C:\Program Files (x86)\Windows Portable Devices\dwm.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files (x86)\Windows Portable Devices\dwm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 10 /tr "'C:\Program Files (x86)\Windows Portable Devices\dwm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Google\CrashReports\dwm.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Program Files (x86)\Google\CrashReports\dwm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 5 /tr "'C:\Program Files (x86)\Google\CrashReports\dwm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 11 /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwm" /sc ONLOGON /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "dwmd" /sc MINUTE /mo 10 /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 7 /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\wininit.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininit" /sc ONLOGON /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\wininit.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "wininitw" /sc MINUTE /mo 14 /tr "'C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\wininit.exe'" /rl HIGHEST /f
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\XfWEItxuzP.bat"
C:\Windows\system32\w32tm.exe
w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe
"C:\Recovery\ed850442-d104-11ee-9c57-c695cbc44580\dwm.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | a0990228.xsph.ru | udp |
| RU | 141.8.192.93:80 | a0990228.xsph.ru | tcp |
| US | 8.8.8.8:53 | ipinfo.io | udp |
| US | 34.117.186.192:443 | ipinfo.io | tcp |
| RU | 141.8.192.93:80 | a0990228.xsph.ru | tcp |
| RU | 141.8.192.93:80 | a0990228.xsph.ru | tcp |
Files
C:\ProviderInto\bg4vLJUaDkf5tC.vbe
| MD5 | 7f1bd72e83931ae16e0939d3dbc24d5b |
| SHA1 | 8e4ebd32d84a2e9e415c86b82332cf467e8ff1ab |
| SHA256 | 3478b04d7b9a3accf9d74e14f39493a5802938dbc774b2946a4c810ad3ee94af |
| SHA512 | d22cad0ce50bfd7fd81c9b067d8388765f51d3fbe406e9008cce04fd0863e591781f26b6259a4b5c528ece7696f7ce3997720961582143ec5627306cce48c57c |
C:\ProviderInto\NmoUHUSCIv.bat
| MD5 | f6f5d0c8f6feac0cb30c89fd1657cb64 |
| SHA1 | be50cec1500209cf68fe55f56b9dcc340546f454 |
| SHA256 | ea164f49511be36687b6c8aba7115701c6dd583f58589d948a72ea12de1c672e |
| SHA512 | 69a7947e16c893818a04887bf8b2e4a8cd22ad91ec9bfaa603c4eec99204c762d6d46493b0298520419f9818e2459ae372a8876b18f470b9138a1fb80f6ad258 |
\ProviderInto\blocksurrogate.exe
| MD5 | 7ca99a0ca6db34fcfa842e5f6c203c94 |
| SHA1 | cf1a8e002cdd663e810281ff2b9093ddfa9527d0 |
| SHA256 | 9de7ec4d1da007ad17d08ae860b474fec5ab46dd834584ba9fb36ff8a00b52f0 |
| SHA512 | 17ae7000770c2f2e7918fad9e202c033bcf3c92490ca04f955142abe164b0583ac22a3659f4dc120643df8c51a9d11b832071dfe66fe2032d6d778d3d4b53a33 |
memory/2736-13-0x0000000000A80000-0x0000000000BDC000-memory.dmp
memory/2736-14-0x0000000000340000-0x000000000035C000-memory.dmp
memory/2736-16-0x0000000000390000-0x00000000003A2000-memory.dmp
memory/2736-15-0x0000000000370000-0x0000000000386000-memory.dmp
memory/2736-17-0x0000000000490000-0x000000000049E000-memory.dmp
memory/2736-18-0x0000000000540000-0x000000000054C000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\XfWEItxuzP.bat
| MD5 | e426c43551a7808b57736948b4c41b86 |
| SHA1 | 4241f92961addbe9f4345a83870d96ab1d4a79de |
| SHA256 | 2e5c1c70b6232b6a108a14c01d1ec5c7d5b2b4699d952fd0447de01a90dcc175 |
| SHA512 | 522681bdd8961d8c2c0abc9a2aaeda810a0b9b80451317e6c378eb0581b73f35b6ae5efc93e4483c18885c276efafa52a5b00f9c798eae1484053161d7f29582 |
memory/2480-34-0x00000000009C0000-0x0000000000B1C000-memory.dmp
memory/2480-35-0x0000000000450000-0x0000000000462000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-03 03:45
Reported
2024-06-03 03:48
Platform
win10v2004-20240426-en
Max time kernel
137s
Max time network
148s
Command Line
Signatures
DcRat
Modifies WinLogon for persistence
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\INF\\smss.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\INF\\smss.exe\", \"C:\\ProviderInto\\taskhostw.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
Process spawned unexpected child process
| Description | Indicator | Process | Target |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe | |
| Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process | N/A | C:\Windows\system32\schtasks.exe |
DCRat payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\Nursultan.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation | C:\Windows\SysWOW64\WScript.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation | C:\ProviderInto\blocksurrogate.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProviderInto\blocksurrogate.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\smss = "\"C:\\Windows\\INF\\smss.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\smss = "\"C:\\Windows\\INF\\smss.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\ProviderInto\\taskhostw.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\taskhostw = "\"C:\\ProviderInto\\taskhostw.exe\"" | C:\ProviderInto\blocksurrogate.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | ipinfo.io | N/A | N/A |
| N/A | ipinfo.io | N/A | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\INF\smss.exe | C:\ProviderInto\blocksurrogate.exe | N/A |
| File opened for modification | C:\Windows\INF\smss.exe | C:\ProviderInto\blocksurrogate.exe | N/A |
| File created | C:\Windows\INF\69ddcba757bf72 | C:\ProviderInto\blocksurrogate.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000_Classes\Local Settings | C:\Users\Admin\AppData\Local\Temp\Nursultan.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProviderInto\blocksurrogate.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\ProviderInto\taskhostw.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\ProviderInto\blocksurrogate.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\ProviderInto\taskhostw.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Nursultan.exe
"C:\Users\Admin\AppData\Local\Temp\Nursultan.exe"
C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\ProviderInto\bg4vLJUaDkf5tC.vbe"
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\ProviderInto\NmoUHUSCIv.bat" "
C:\ProviderInto\blocksurrogate.exe
"C:\ProviderInto\blocksurrogate.exe"
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Windows\INF\smss.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smss" /sc ONLOGON /tr "'C:\Windows\INF\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "smsss" /sc MINUTE /mo 12 /tr "'C:\Windows\INF\smss.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 10 /tr "'C:\ProviderInto\taskhostw.exe'" /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostw" /sc ONLOGON /tr "'C:\ProviderInto\taskhostw.exe'" /rl HIGHEST /f
C:\Windows\system32\schtasks.exe
schtasks.exe /create /tn "taskhostwt" /sc MINUTE /mo 8 /tr "'C:\ProviderInto\taskhostw.exe'" /rl HIGHEST /f
C:\ProviderInto\taskhostw.exe
"C:\ProviderInto\taskhostw.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | a0990228.xsph.ru | udp |
| RU | 141.8.192.93:80 | a0990228.xsph.ru | tcp |
| US | 8.8.8.8:53 | 217.106.137.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 97.17.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 93.192.8.141.in-addr.arpa | udp |
| US | 8.8.8.8:53 | ipinfo.io | udp |
| US | 34.117.186.192:443 | ipinfo.io | tcp |
| RU | 141.8.192.93:80 | a0990228.xsph.ru | tcp |
| US | 8.8.8.8:53 | 192.186.117.34.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 91.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 82.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 23.236.111.52.in-addr.arpa | udp |
| RU | 141.8.192.93:80 | a0990228.xsph.ru | tcp |
Files
C:\ProviderInto\bg4vLJUaDkf5tC.vbe
| MD5 | 7f1bd72e83931ae16e0939d3dbc24d5b |
| SHA1 | 8e4ebd32d84a2e9e415c86b82332cf467e8ff1ab |
| SHA256 | 3478b04d7b9a3accf9d74e14f39493a5802938dbc774b2946a4c810ad3ee94af |
| SHA512 | d22cad0ce50bfd7fd81c9b067d8388765f51d3fbe406e9008cce04fd0863e591781f26b6259a4b5c528ece7696f7ce3997720961582143ec5627306cce48c57c |
C:\ProviderInto\NmoUHUSCIv.bat
| MD5 | f6f5d0c8f6feac0cb30c89fd1657cb64 |
| SHA1 | be50cec1500209cf68fe55f56b9dcc340546f454 |
| SHA256 | ea164f49511be36687b6c8aba7115701c6dd583f58589d948a72ea12de1c672e |
| SHA512 | 69a7947e16c893818a04887bf8b2e4a8cd22ad91ec9bfaa603c4eec99204c762d6d46493b0298520419f9818e2459ae372a8876b18f470b9138a1fb80f6ad258 |
C:\ProviderInto\blocksurrogate.exe
| MD5 | 7ca99a0ca6db34fcfa842e5f6c203c94 |
| SHA1 | cf1a8e002cdd663e810281ff2b9093ddfa9527d0 |
| SHA256 | 9de7ec4d1da007ad17d08ae860b474fec5ab46dd834584ba9fb36ff8a00b52f0 |
| SHA512 | 17ae7000770c2f2e7918fad9e202c033bcf3c92490ca04f955142abe164b0583ac22a3659f4dc120643df8c51a9d11b832071dfe66fe2032d6d778d3d4b53a33 |
memory/4372-12-0x00007FFFD3593000-0x00007FFFD3595000-memory.dmp
memory/4372-13-0x0000000000950000-0x0000000000AAC000-memory.dmp
memory/4372-14-0x0000000002B90000-0x0000000002BAC000-memory.dmp
memory/4372-15-0x000000001BC80000-0x000000001BCD0000-memory.dmp
memory/4372-16-0x0000000002BB0000-0x0000000002BC6000-memory.dmp
memory/4372-17-0x0000000001380000-0x0000000001392000-memory.dmp
memory/4372-18-0x000000001C330000-0x000000001C858000-memory.dmp
memory/4372-19-0x000000001BC30000-0x000000001BC3E000-memory.dmp
memory/4372-20-0x000000001BC40000-0x000000001BC4C000-memory.dmp
memory/4592-36-0x0000000002640000-0x0000000002652000-memory.dmp