Analysis Overview
SHA256
ed5fe58c45c8b0e48c4c9405ba8065234090e19e145465117e0d2342f43fd872
Threat Level: Known bad
The file Krampus.rar was found to be: Known bad.
Malicious Activity Summary
Umbral family
Umbral
Detect Umbral payload
Drops file in Drivers directory
Reads user/profile data of web browsers
Looks up external IP address via web service
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Suspicious behavior: EnumeratesProcesses
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Views/modifies file attributes
Detects videocard installed
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-18 15:48
Signatures
Detect Umbral payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Umbral family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-18 15:48
Reported
2024-04-18 15:51
Platform
win11-20240412-en
Max time kernel
147s
Max time network
151s
Command Line
Signatures
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3263309122-2820180308-3568046652-1000_Classes\Local Settings | C:\Windows\system32\cmd.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3263309122-2820180308-3568046652-1000_Classes\Local Settings | C:\Windows\system32\OpenWith.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
Processes
C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Krampus.rar
C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
Network
| Country | Destination | Domain | Proto |
| IE | 52.111.236.22:443 | tcp | |
| US | 8.8.8.8:53 | 19.229.111.52.in-addr.arpa | udp |
Files
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-18 15:48
Reported
2024-04-18 15:49
Platform
win11-20240412-en
Max time kernel
6s
Max time network
20s
Command Line
Signatures
Detect Umbral payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Umbral
Drops file in Drivers directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\System32\drivers\etc\hosts | C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.exe | N/A |
Reads user/profile data of web browsers
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | ip-api.com | N/A | N/A |
Detects videocard installed
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.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 |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.exe | N/A |
| Token: SeIncreaseQuotaPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeSecurityPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeTakeOwnershipPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeLoadDriverPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeSystemtimePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeProfSingleProcessPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeSystemEnvironmentPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeRemoteShutdownPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeUndockPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeManageVolumePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: 33 | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: 34 | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: 35 | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: 36 | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeIncreaseQuotaPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeSecurityPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeTakeOwnershipPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeLoadDriverPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeSystemtimePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeProfSingleProcessPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeCreatePagefilePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeBackupPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeRestorePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeShutdownPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeSystemEnvironmentPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeRemoteShutdownPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeUndockPrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: SeManageVolumePrivilege | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: 33 | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: 34 | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: 35 | N/A | C:\Windows\System32\Wbem\wmic.exe | N/A |
| Token: 36 | N/A | C:\Windows\System32\Wbem\wmic.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 |
Suspicious use of WriteProcessMemory
Views/modifies file attributes
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SYSTEM32\attrib.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.exe
"C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.exe"
C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
C:\Windows\SYSTEM32\attrib.exe
"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.exe"
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Krampus\b5uEJHZB6Rl.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" os get Caption
C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" computersystem get totalphysicalmemory
C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
C:\Windows\System32\Wbem\wmic.exe
"wmic" path win32_VideoController get name
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | gstatic.com | udp |
| GB | 172.217.16.227:443 | gstatic.com | tcp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
| US | 8.8.8.8:53 | 227.16.217.172.in-addr.arpa | udp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
Files
memory/2092-0-0x000001DD8E4A0000-0x000001DD8E4E0000-memory.dmp
memory/2092-1-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/2092-2-0x000001DDA8AF0000-0x000001DDA8B00000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jib5u2fi.orh.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/2824-11-0x0000015515430000-0x0000015515452000-memory.dmp
memory/2824-12-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/2824-13-0x000001552DAA0000-0x000001552DAB0000-memory.dmp
memory/2824-14-0x000001552DAA0000-0x000001552DAB0000-memory.dmp
memory/2824-15-0x000001552DAA0000-0x000001552DAB0000-memory.dmp
memory/2824-18-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
| MD5 | 627073ee3ca9676911bee35548eff2b8 |
| SHA1 | 4c4b68c65e2cab9864b51167d710aa29ebdcff2e |
| SHA256 | 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c |
| SHA512 | 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb |
memory/5052-20-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/5052-21-0x00000187BBC10000-0x00000187BBC20000-memory.dmp
memory/5052-22-0x00000187BBC10000-0x00000187BBC20000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 2e8eb51096d6f6781456fef7df731d97 |
| SHA1 | ec2aaf851a618fb43c3d040a13a71997c25bda43 |
| SHA256 | 96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864 |
| SHA512 | 0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2 |
memory/5052-32-0x00000187BBC10000-0x00000187BBC20000-memory.dmp
memory/2092-33-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/5052-34-0x00000187BBC10000-0x00000187BBC20000-memory.dmp
memory/5052-36-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/2092-39-0x000001DDA8C80000-0x000001DDA8CF6000-memory.dmp
memory/2092-40-0x000001DDA8D00000-0x000001DDA8D50000-memory.dmp
memory/2092-41-0x000001DDA8AD0000-0x000001DDA8AEE000-memory.dmp
memory/3572-50-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/3572-51-0x000002953A230000-0x000002953A240000-memory.dmp
memory/3572-52-0x000002953A230000-0x000002953A240000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 441a842138038e6385e430a90d7ea608 |
| SHA1 | 7b3712d2cdd37e10ee9b3994131ee5175e920f01 |
| SHA256 | 47592f3324179912d3bdba336b9e75568c2c5f1a9fb37c1ba9f0db9df822164c |
| SHA512 | 9dbddc3216f2a132ae3961b3aeac2c5b8828dcc9292f6c5bf1171c47453aa8687f92658818d771413492c0ea565e9ede17b9c03e427af9dc2ac21a78369a6666 |
memory/2092-54-0x000001DDA8AF0000-0x000001DDA8B00000-memory.dmp
memory/3572-67-0x000002953A230000-0x000002953A240000-memory.dmp
memory/3572-69-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/1152-78-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/1152-81-0x000001FFBFE90000-0x000001FFBFEA0000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | e8ad350bb24c7ab38efd0ef0553239c7 |
| SHA1 | 887c19e4c11de19854458e26a1ed05b67a75bf29 |
| SHA256 | 5cf85b38cbbf1a064a4f8001a0ec031993d44e46b8e65d713785c84916cb8ffd |
| SHA512 | 74fef147e98b8b576712c212174a7793deb619d54c7ac7956e38ed4e09202f0c93ae4ec9e89cd4d0ac79c481d30c5c3fc5a3d042537c74d7bffda1f8453aef6e |
memory/1152-82-0x000001FFBFE90000-0x000001FFBFEA0000-memory.dmp
memory/1152-79-0x000001FFBFE90000-0x000001FFBFEA0000-memory.dmp
memory/1152-84-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/2092-87-0x000001DDA8C50000-0x000001DDA8C62000-memory.dmp
memory/2092-86-0x000001DDA8C20000-0x000001DDA8C2A000-memory.dmp
memory/2016-90-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
memory/2016-91-0x0000023863350000-0x0000023863360000-memory.dmp
memory/2016-92-0x0000023863350000-0x0000023863360000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 21afec55047674edd150dc516f1c851e |
| SHA1 | e4b709d2bfaf132bd729e61b9740948dffaffa90 |
| SHA256 | 43844e938dc4b56a86c4aedec50551f4771076cdcd2033416f6194a9bc84a951 |
| SHA512 | 63e12c9a9e783494d86c09f1a5bf151a311e789beefcdc1ab86d7e485bc97ecbdf609f6933a0f59243d4198b4483d1ebabc4aa42734f81f2a1785c59c8281510 |
memory/2016-102-0x0000023863350000-0x0000023863360000-memory.dmp
memory/2016-104-0x00007FFA17760000-0x00007FFA18222000-memory.dmp
Analysis: behavioral3
Detonation Overview
Submitted
2024-04-18 15:48
Reported
2024-04-18 15:51
Platform
win11-20240412-en
Max time kernel
144s
Max time network
152s
Command Line
Signatures
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-243033537-3771492294-1461557691-1000_Classes\Local Settings | C:\Windows\system32\cmd.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3528 wrote to memory of 4912 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 3528 wrote to memory of 4912 | N/A | C:\Windows\system32\cmd.exe | C:\Windows\system32\NOTEPAD.EXE |
Processes
C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Krampus\krampusexec-65cafadfc556c.txt
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\Krampus\krampusexec-65cafadfc556c.txt