umbral | d263275c72e75ae20efea5fd0f635335d7591ed2094c391f8b0747316a4182f4

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
11-07-2024 22:05

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General

Target

Umbral.exe
Size

229KB
MD5

6e1ac269ea812669f7007ab3b279ff46
SHA1

03ca8457e3ed82c50db62dddbe85e45118015704
SHA256

d263275c72e75ae20efea5fd0f635335d7591ed2094c391f8b0747316a4182f4
SHA512

925cc2227ad7840796371d387fe9252f3cdfc546aae45afbba07247440031c5154b687ea5c187705d279f47bece0b3aa41c6dffd5cdf52bbe90aacb9f13ac1a9
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD45xsWGsyVtGhTOMdRYTQb8e1mwi:foZtL+EP8TsWGsyVtGhTOMdRYs6

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2252-1-0x0000000000D00000-0x0000000000D40000-memory.dmp	family_umbral

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

execution

PowerShell

T1059.001

pid	Process
2724	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2220	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

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

Web Service

T1102

flow	ioc
7	discord.com
8	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2224	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1948	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2252	Umbral.exe
2724	powershell.exe
3064	powershell.exe
1808	powershell.exe
2620	powershell.exe
1228	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2252	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2716	wmic.exe
Token: SeSecurityPrivilege	2716	wmic.exe
Token: SeTakeOwnershipPrivilege	2716	wmic.exe
Token: SeLoadDriverPrivilege	2716	wmic.exe
Token: SeSystemProfilePrivilege	2716	wmic.exe
Token: SeSystemtimePrivilege	2716	wmic.exe
Token: SeProfSingleProcessPrivilege	2716	wmic.exe
Token: SeIncBasePriorityPrivilege	2716	wmic.exe
Token: SeCreatePagefilePrivilege	2716	wmic.exe
Token: SeBackupPrivilege	2716	wmic.exe
Token: SeRestorePrivilege	2716	wmic.exe
Token: SeShutdownPrivilege	2716	wmic.exe
Token: SeDebugPrivilege	2716	wmic.exe
Token: SeSystemEnvironmentPrivilege	2716	wmic.exe
Token: SeRemoteShutdownPrivilege	2716	wmic.exe
Token: SeUndockPrivilege	2716	wmic.exe
Token: SeManageVolumePrivilege	2716	wmic.exe
Token: 33	2716	wmic.exe
Token: 34	2716	wmic.exe
Token: 35	2716	wmic.exe
Token: SeIncreaseQuotaPrivilege	2716	wmic.exe
Token: SeSecurityPrivilege	2716	wmic.exe
Token: SeTakeOwnershipPrivilege	2716	wmic.exe
Token: SeLoadDriverPrivilege	2716	wmic.exe
Token: SeSystemProfilePrivilege	2716	wmic.exe
Token: SeSystemtimePrivilege	2716	wmic.exe
Token: SeProfSingleProcessPrivilege	2716	wmic.exe
Token: SeIncBasePriorityPrivilege	2716	wmic.exe
Token: SeCreatePagefilePrivilege	2716	wmic.exe
Token: SeBackupPrivilege	2716	wmic.exe
Token: SeRestorePrivilege	2716	wmic.exe
Token: SeShutdownPrivilege	2716	wmic.exe
Token: SeDebugPrivilege	2716	wmic.exe
Token: SeSystemEnvironmentPrivilege	2716	wmic.exe
Token: SeRemoteShutdownPrivilege	2716	wmic.exe
Token: SeUndockPrivilege	2716	wmic.exe
Token: SeManageVolumePrivilege	2716	wmic.exe
Token: 33	2716	wmic.exe
Token: 34	2716	wmic.exe
Token: 35	2716	wmic.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	3064	powershell.exe
Token: SeDebugPrivilege	1808	powershell.exe
Token: SeDebugPrivilege	2620	powershell.exe
Token: SeIncreaseQuotaPrivilege	744	wmic.exe
Token: SeSecurityPrivilege	744	wmic.exe
Token: SeTakeOwnershipPrivilege	744	wmic.exe
Token: SeLoadDriverPrivilege	744	wmic.exe
Token: SeSystemProfilePrivilege	744	wmic.exe
Token: SeSystemtimePrivilege	744	wmic.exe
Token: SeProfSingleProcessPrivilege	744	wmic.exe
Token: SeIncBasePriorityPrivilege	744	wmic.exe
Token: SeCreatePagefilePrivilege	744	wmic.exe
Token: SeBackupPrivilege	744	wmic.exe
Token: SeRestorePrivilege	744	wmic.exe
Token: SeShutdownPrivilege	744	wmic.exe
Token: SeDebugPrivilege	744	wmic.exe
Token: SeSystemEnvironmentPrivilege	744	wmic.exe
Token: SeRemoteShutdownPrivilege	744	wmic.exe
Token: SeUndockPrivilege	744	wmic.exe
Token: SeManageVolumePrivilege	744	wmic.exe
Token: 33	744	wmic.exe
Token: 34	744	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2716	2252	Umbral.exe	30
PID 2252 wrote to memory of 2716	2252	Umbral.exe	30
PID 2252 wrote to memory of 2716	2252	Umbral.exe	30
PID 2252 wrote to memory of 2872	2252	Umbral.exe	33
PID 2252 wrote to memory of 2872	2252	Umbral.exe	33
PID 2252 wrote to memory of 2872	2252	Umbral.exe	33
PID 2252 wrote to memory of 2724	2252	Umbral.exe	35
PID 2252 wrote to memory of 2724	2252	Umbral.exe	35
PID 2252 wrote to memory of 2724	2252	Umbral.exe	35
PID 2252 wrote to memory of 3064	2252	Umbral.exe	37
PID 2252 wrote to memory of 3064	2252	Umbral.exe	37
PID 2252 wrote to memory of 3064	2252	Umbral.exe	37
PID 2252 wrote to memory of 1808	2252	Umbral.exe	39
PID 2252 wrote to memory of 1808	2252	Umbral.exe	39
PID 2252 wrote to memory of 1808	2252	Umbral.exe	39
PID 2252 wrote to memory of 2620	2252	Umbral.exe	41
PID 2252 wrote to memory of 2620	2252	Umbral.exe	41
PID 2252 wrote to memory of 2620	2252	Umbral.exe	41
PID 2252 wrote to memory of 744	2252	Umbral.exe	43
PID 2252 wrote to memory of 744	2252	Umbral.exe	43
PID 2252 wrote to memory of 744	2252	Umbral.exe	43
PID 2252 wrote to memory of 2388	2252	Umbral.exe	45
PID 2252 wrote to memory of 2388	2252	Umbral.exe	45
PID 2252 wrote to memory of 2388	2252	Umbral.exe	45
PID 2252 wrote to memory of 1604	2252	Umbral.exe	47
PID 2252 wrote to memory of 1604	2252	Umbral.exe	47
PID 2252 wrote to memory of 1604	2252	Umbral.exe	47
PID 2252 wrote to memory of 1228	2252	Umbral.exe	49
PID 2252 wrote to memory of 1228	2252	Umbral.exe	49
PID 2252 wrote to memory of 1228	2252	Umbral.exe	49
PID 2252 wrote to memory of 2224	2252	Umbral.exe	51
PID 2252 wrote to memory of 2224	2252	Umbral.exe	51
PID 2252 wrote to memory of 2224	2252	Umbral.exe	51
PID 2252 wrote to memory of 2220	2252	Umbral.exe	53
PID 2252 wrote to memory of 2220	2252	Umbral.exe	53
PID 2252 wrote to memory of 2220	2252	Umbral.exe	53
PID 2220 wrote to memory of 1948	2220	cmd.exe	55
PID 2220 wrote to memory of 1948	2220	cmd.exe	55
PID 2220 wrote to memory of 1948	2220	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2872	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2716
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2872
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2724
- 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:3064
- 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:1808
- 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:2620
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2388
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1604
- 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:1228
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2224
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2220
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1948

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

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
c0a836e527022efa6a124f3eb230be77

SHA1
907f72caa56f1289e42f959c1f931c12967d416f

SHA256
cac3a598cc0840a1d585b9e9331b4a341f3818dfb2f47324b12595ae997cf322

SHA512
80a276d9be4c6fbebf52d4b5bff248192281e59123f060772c27ea2c79fab97953efa8d994dedf272d7b8054cfca5699f86c54fd094dfac31c5dc6d327bc5e68

Download Submit
memory/1228-43-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2252-0-0x000007FEF6163000-0x000007FEF6164000-memory.dmp

Filesize
4KB

Download
memory/2252-1-0x0000000000D00000-0x0000000000D40000-memory.dmp

Filesize
256KB

Download
memory/2252-2-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-47-0x000007FEF6160000-0x000007FEF6B4C000-memory.dmp

Filesize
9.9MB

Download
memory/2724-7-0x000000001B540000-0x000000001B822000-memory.dmp

Filesize
2.9MB

Download
memory/2724-8-0x0000000002070000-0x0000000002078000-memory.dmp

Filesize
32KB

Download
memory/3064-14-0x000000001B590000-0x000000001B872000-memory.dmp

Filesize
2.9MB

Download
memory/3064-15-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download