umbral | 8cbfb916aafe951957c1c79531deaa85f3c3d71bd9afa0b42d0996c71371116f

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-02-2025 21:57

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General

Target

Woofer.exe
Size

229KB
MD5

8a2615083862de25f6d86c69304a4078
SHA1

4c88dbba86b4023a22700671e2116c96bd8ebb0f
SHA256

8cbfb916aafe951957c1c79531deaa85f3c3d71bd9afa0b42d0996c71371116f
SHA512

ae108ba79a2f5782aa82f90fda878ccc442f15c0938011b5d03bafb0f4c72497813b21f8bf7c4f358f232bf118946e556d2315cf52cdc91c6dd992d7bd326df4
SSDEEP

6144:lloZMArIkd8g+EtXHkv/iD45GEoaxfEY32mfh8ItRub8e1mfi:noZHL+EP85GEoaxfEY32mfh8It8V

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2172-1-0x0000000000230000-0x0000000000270000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2608	powershell.exe
1248	powershell.exe
2000	powershell.exe
1960	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
9	discord.com
10	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
7	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2176	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2608	powershell.exe
1248	powershell.exe
2000	powershell.exe
2792	powershell.exe
1960	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2172	Woofer.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeDebugPrivilege	1248	powershell.exe
Token: SeDebugPrivilege	2000	powershell.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeIncreaseQuotaPrivilege	2940	wmic.exe
Token: SeSecurityPrivilege	2940	wmic.exe
Token: SeTakeOwnershipPrivilege	2940	wmic.exe
Token: SeLoadDriverPrivilege	2940	wmic.exe
Token: SeSystemProfilePrivilege	2940	wmic.exe
Token: SeSystemtimePrivilege	2940	wmic.exe
Token: SeProfSingleProcessPrivilege	2940	wmic.exe
Token: SeIncBasePriorityPrivilege	2940	wmic.exe
Token: SeCreatePagefilePrivilege	2940	wmic.exe
Token: SeBackupPrivilege	2940	wmic.exe
Token: SeRestorePrivilege	2940	wmic.exe
Token: SeShutdownPrivilege	2940	wmic.exe
Token: SeDebugPrivilege	2940	wmic.exe
Token: SeSystemEnvironmentPrivilege	2940	wmic.exe
Token: SeRemoteShutdownPrivilege	2940	wmic.exe
Token: SeUndockPrivilege	2940	wmic.exe
Token: SeManageVolumePrivilege	2940	wmic.exe
Token: 33	2940	wmic.exe
Token: 34	2940	wmic.exe
Token: 35	2940	wmic.exe
Token: SeIncreaseQuotaPrivilege	2940	wmic.exe
Token: SeSecurityPrivilege	2940	wmic.exe
Token: SeTakeOwnershipPrivilege	2940	wmic.exe
Token: SeLoadDriverPrivilege	2940	wmic.exe
Token: SeSystemProfilePrivilege	2940	wmic.exe
Token: SeSystemtimePrivilege	2940	wmic.exe
Token: SeProfSingleProcessPrivilege	2940	wmic.exe
Token: SeIncBasePriorityPrivilege	2940	wmic.exe
Token: SeCreatePagefilePrivilege	2940	wmic.exe
Token: SeBackupPrivilege	2940	wmic.exe
Token: SeRestorePrivilege	2940	wmic.exe
Token: SeShutdownPrivilege	2940	wmic.exe
Token: SeDebugPrivilege	2940	wmic.exe
Token: SeSystemEnvironmentPrivilege	2940	wmic.exe
Token: SeRemoteShutdownPrivilege	2940	wmic.exe
Token: SeUndockPrivilege	2940	wmic.exe
Token: SeManageVolumePrivilege	2940	wmic.exe
Token: 33	2940	wmic.exe
Token: 34	2940	wmic.exe
Token: 35	2940	wmic.exe
Token: SeIncreaseQuotaPrivilege	2412	wmic.exe
Token: SeSecurityPrivilege	2412	wmic.exe
Token: SeTakeOwnershipPrivilege	2412	wmic.exe
Token: SeLoadDriverPrivilege	2412	wmic.exe
Token: SeSystemProfilePrivilege	2412	wmic.exe
Token: SeSystemtimePrivilege	2412	wmic.exe
Token: SeProfSingleProcessPrivilege	2412	wmic.exe
Token: SeIncBasePriorityPrivilege	2412	wmic.exe
Token: SeCreatePagefilePrivilege	2412	wmic.exe
Token: SeBackupPrivilege	2412	wmic.exe
Token: SeRestorePrivilege	2412	wmic.exe
Token: SeShutdownPrivilege	2412	wmic.exe
Token: SeDebugPrivilege	2412	wmic.exe
Token: SeSystemEnvironmentPrivilege	2412	wmic.exe
Token: SeRemoteShutdownPrivilege	2412	wmic.exe
Token: SeUndockPrivilege	2412	wmic.exe
Token: SeManageVolumePrivilege	2412	wmic.exe
Token: 33	2412	wmic.exe
Token: 34	2412	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2608	2172	Woofer.exe	31
PID 2172 wrote to memory of 2608	2172	Woofer.exe	31
PID 2172 wrote to memory of 2608	2172	Woofer.exe	31
PID 2172 wrote to memory of 1248	2172	Woofer.exe	33
PID 2172 wrote to memory of 1248	2172	Woofer.exe	33
PID 2172 wrote to memory of 1248	2172	Woofer.exe	33
PID 2172 wrote to memory of 2000	2172	Woofer.exe	35
PID 2172 wrote to memory of 2000	2172	Woofer.exe	35
PID 2172 wrote to memory of 2000	2172	Woofer.exe	35
PID 2172 wrote to memory of 2792	2172	Woofer.exe	37
PID 2172 wrote to memory of 2792	2172	Woofer.exe	37
PID 2172 wrote to memory of 2792	2172	Woofer.exe	37
PID 2172 wrote to memory of 2940	2172	Woofer.exe	39
PID 2172 wrote to memory of 2940	2172	Woofer.exe	39
PID 2172 wrote to memory of 2940	2172	Woofer.exe	39
PID 2172 wrote to memory of 2412	2172	Woofer.exe	42
PID 2172 wrote to memory of 2412	2172	Woofer.exe	42
PID 2172 wrote to memory of 2412	2172	Woofer.exe	42
PID 2172 wrote to memory of 2316	2172	Woofer.exe	44
PID 2172 wrote to memory of 2316	2172	Woofer.exe	44
PID 2172 wrote to memory of 2316	2172	Woofer.exe	44
PID 2172 wrote to memory of 1960	2172	Woofer.exe	46
PID 2172 wrote to memory of 1960	2172	Woofer.exe	46
PID 2172 wrote to memory of 1960	2172	Woofer.exe	46
PID 2172 wrote to memory of 2176	2172	Woofer.exe	48
PID 2172 wrote to memory of 2176	2172	Woofer.exe	48
PID 2172 wrote to memory of 2176	2172	Woofer.exe	48

C:\Users\Admin\AppData\Local\Temp\Woofer.exe
"C:\Users\Admin\AppData\Local\Temp\Woofer.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Woofer.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2608
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1248
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2000
- 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:2792
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2940
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2316
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1960
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2176

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\VTN2NAHST1H3DQQWNG8V.temp

Filesize
7KB

MD5
f47e7327bd20118ccbb738a08c2d8f33

SHA1
fe2e17f2a79061cde373026a2625f030c3e6611d

SHA256
2902465df34d1b84ed7a1f02f1cd413bddcb0971ccf2a780a602c189663fe46a

SHA512
a2bb7603e0bd3bfc397db2a6dc23e5523d1d799a1f3b074169bb021234dfca19fcd07cc86d8bf9721848949cb1eae6bdff324137d10edd0db1231df78f11d091

Download Submit
memory/1248-22-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download
memory/1248-21-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2172-4-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp

Filesize
9.9MB

Download
memory/2172-0-0x000007FEF5E53000-0x000007FEF5E54000-memory.dmp

Filesize
4KB

Download
memory/2172-3-0x000007FEF5E53000-0x000007FEF5E54000-memory.dmp

Filesize
4KB

Download
memory/2172-2-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp

Filesize
9.9MB

Download
memory/2172-1-0x0000000000230000-0x0000000000270000-memory.dmp

Filesize
256KB

Download
memory/2172-54-0x000007FEF5E50000-0x000007FEF683C000-memory.dmp

Filesize
9.9MB

Download
memory/2608-9-0x000007FEED8CE000-0x000007FEED8CF000-memory.dmp

Filesize
4KB

Download
memory/2608-10-0x000000001B600000-0x000000001B8E2000-memory.dmp

Filesize
2.9MB

Download
memory/2608-11-0x00000000028E0000-0x00000000028E8000-memory.dmp

Filesize
32KB

Download
memory/2608-13-0x000007FEED610000-0x000007FEEDFAD000-memory.dmp

Filesize
9.6MB

Download
memory/2608-12-0x000007FEED610000-0x000007FEEDFAD000-memory.dmp

Filesize
9.6MB

Download
memory/2608-14-0x000007FEED610000-0x000007FEEDFAD000-memory.dmp

Filesize
9.6MB

Download
memory/2608-15-0x000007FEED610000-0x000007FEEDFAD000-memory.dmp

Filesize
9.6MB

Download