Analysis Overview
SHA256
9f4e15691c7cba48529a16545029e3d253cdf6eda498347842211c0b2622777e
Threat Level: Known bad
The file SolaraBootstrapper.exe was found to be: Known bad.
Malicious Activity Summary
Detect Xworm Payload
Xworm
Command and Scripting Interpreter: PowerShell
Executes dropped EXE
Drops startup file
Checks computer location settings
Adds Run key to start application
Unsigned PE
Enumerates physical storage devices
Uses Task Scheduler COM API
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-27 17:08
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-27 17:08
Reported
2024-05-27 17:09
Platform
win10v2004-20240426-en
Max time kernel
64s
Max time network
67s
Command Line
Signatures
Detect Xworm Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
| N/A | N/A | N/A | N/A |
Xworm
Command and Scripting Interpreter: PowerShell
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\Solara.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MicrosoftEdgeUpdateCore.lnk | C:\Users\Admin\AppData\Local\Temp\Solara.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\MicrosoftEdgeUpdateCore.lnk | C:\Users\Admin\AppData\Local\Temp\Solara.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Solara.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdateCore.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MicrosoftEdgeUpdateCore = "C:\\Users\\Admin\\AppData\\Local\\MicrosoftEdgeUpdateCore.exe" | C:\Users\Admin\AppData\Local\Temp\Solara.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 |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Solara.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Solara.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdateCore.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Solara.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
"C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe"
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Solara.exe'
C:\Users\Admin\AppData\Local\Temp\Solara.exe
"C:\Users\Admin\AppData\Local\Temp\Solara.exe"
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\wd.bat'
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\wd.bat" "
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /K "C:\Users\Admin\AppData\Local\Temp\wd.bat"
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -Command "Add-MpPreference -ExclusionPath 'C:\Users' ; Add-MpPreference -ExclusionProcess 'msedge.exe'"
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Solara.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Solara.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdateCore.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'MicrosoftEdgeUpdateCore.exe'
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "MicrosoftEdgeUpdateCore" /tr "C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdateCore.exe"
C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdateCore.exe
C:\Users\Admin\AppData\Local\MicrosoftEdgeUpdateCore.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.24.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | kc6fvwrif8.duckdns.org | udp |
| NL | 37.120.141.139:1605 | kc6fvwrif8.duckdns.org | tcp |
| US | 8.8.8.8:53 | 139.141.120.37.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
Files
memory/3296-0-0x00007FFAA2D73000-0x00007FFAA2D75000-memory.dmp
memory/3296-1-0x0000000000D80000-0x0000000000D90000-memory.dmp
memory/3296-2-0x00007FFAA2D70000-0x00007FFAA3831000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\SolaraBootstrapper.exe
| MD5 | d06c816e7c13422b694ba5c4aa9b4ab0 |
| SHA1 | ca2997045fd9c3c04b98230f328f89dd10381626 |
| SHA256 | 9f4e15691c7cba48529a16545029e3d253cdf6eda498347842211c0b2622777e |
| SHA512 | 2a2953cc177cda9d82dc2b42d59a24efb8c562a6a48d9407292620f54bb8025adc88401a4b66eca53200701beb6f73d57eb75a91dad1cb64dd0bfcae98c10618 |
memory/1240-4-0x00007FFAA2D70000-0x00007FFAA3831000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_30xls1s5.wil.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/1844-14-0x000002554B630000-0x000002554B652000-memory.dmp
memory/1844-15-0x00007FFAA2D70000-0x00007FFAA3831000-memory.dmp
memory/1844-16-0x00007FFAA2D70000-0x00007FFAA3831000-memory.dmp
memory/1844-17-0x00007FFAA2D70000-0x00007FFAA3831000-memory.dmp
memory/1844-20-0x00007FFAA2D70000-0x00007FFAA3831000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Solara.exe
| MD5 | 4fd2e20e8786696b34718903b88f6e08 |
| SHA1 | 43bd2574ae6cb27e0bb190c264d1c7601a4f7b2d |
| SHA256 | cfd564af1265d8b04db1cea2a2b0d1d6332e59d24ec7ad7c995d8b44343703e6 |
| SHA512 | 0600931b9af0b72555bcd76c5e6f8621f93c001a1e2e50b3063dc110db5cfb63a0e266c1625182fc0b7542816fcdc92872f7d81af36ed25fd59ef23b0b98f484 |
memory/2364-33-0x0000000000580000-0x0000000000592000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
| MD5 | d85ba6ff808d9e5444a4b369f5bc2730 |
| SHA1 | 31aa9d96590fff6981b315e0b391b575e4c0804a |
| SHA256 | 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f |
| SHA512 | 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249 |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 77d622bb1a5b250869a3238b9bc1402b |
| SHA1 | d47f4003c2554b9dfc4c16f22460b331886b191b |
| SHA256 | f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb |
| SHA512 | d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9 |
memory/1240-46-0x00007FFAA2D70000-0x00007FFAA3831000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\SolaraBootstrapper.exe.log
| MD5 | 2ff39f6c7249774be85fd60a8f9a245e |
| SHA1 | 684ff36b31aedc1e587c8496c02722c6698c1c4e |
| SHA256 | e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced |
| SHA512 | 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1 |
memory/3296-53-0x00007FFAA2D70000-0x00007FFAA3831000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\wd.bat
| MD5 | d0efdb25af889198a6aa353cb2a35c30 |
| SHA1 | 4890e2646976d833890d8cd82ab9ac5641bdec84 |
| SHA256 | 5f3448ff787c59ef65c22e4003fdb5aa56483ac088a955a410ffc71dde47ea6f |
| SHA512 | bdd0f4e9d17e5dac3f8e08220b38d5b40fb5e08719e48d5ae3f9ec33802a278d9e2784a130aef63810f3270e3a4bbc7ec29c606ce3c3ca2f26705363f2634719 |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | b51dc9e5ec3c97f72b4ca9488bbb4462 |
| SHA1 | 5c1e8c0b728cd124edcacefb399bbd5e25b21bd3 |
| SHA256 | 976f9534aa2976c85c2455bdde786a3f55d63aefdd40942eba1223c4c93590db |
| SHA512 | 0e5aa6cf64c535aefb833e5757b68e1094c87424abe2615a7d7d26b1b31eff358d12e36e75ca57fd690a9919b776600bf4c5c0e5a5df55366ba62238bdf3f280 |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 34f595487e6bfd1d11c7de88ee50356a |
| SHA1 | 4caad088c15766cc0fa1f42009260e9a02f953bb |
| SHA256 | 0f9a4b52e01cb051052228a55d0515911b7ef5a8db3cf925528c746df511424d |
| SHA512 | 10976c5deaf9fac449e703e852c3b08d099f430de2d7c7b8e2525c35d63e28b890e5aab63feff9b20bca0aaf9f35a3ba411aee3fbeee9ea59f90ed25bd617a0b |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | da5c82b0e070047f7377042d08093ff4 |
| SHA1 | 89d05987cd60828cca516c5c40c18935c35e8bd3 |
| SHA256 | 77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5 |
| SHA512 | 7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | b1a1d8b05525b7b0c5babfd80488c1f2 |
| SHA1 | c85bbd6b7d0143676916c20fd52720499c2bb5c6 |
| SHA256 | adad192fc86c2f939fd3f70cb9ad323139a4e100f7c90b4454e2c53bdbc9b705 |
| SHA512 | 346c6513c1373bab58439e37d3f75de1c5c587d7eb27076cf696e885a027b3b38d70b585839d1a2e7f2270cdcf0dac8c1fdff799f3b1158242ae9e3364c2a06e |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | ce4540390cc4841c8973eb5a3e9f4f7d |
| SHA1 | 2293f30a6f4c9538bc5b06606c10a50ab4ecef8e |
| SHA256 | e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105 |
| SHA512 | 2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b |