umbral | 2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2

Analysis

max time kernel
134s
max time network
136s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
05-06-2024 08:17

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General

Target

Umbral.exe
Size

227KB
MD5

53681862212e052e3c6b3e9ca9594428
SHA1

f89c700368b19d182062f673f9b51199e08c47cc
SHA256

2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2
SHA512

2f9649751aeeabd4e59b7e172937518bb6867ce99eee00687243d6218edbdbc5d573a5cea36416131a3787360d215d557f91c75f480d30ce3d6bbd1152e81fa8
SSDEEP

6144:+loZM9rIkd8g+EtXHkv/iD4M6Q2nLxCqV0QhTuOLQjb8e1mui:ooZOL+EP8M6Q2nLxCqV0QhTuOLKY

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2324-0-0x000002B448460000-0x000002B4484A0000-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
1948	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
216	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4960	PING.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
1948	powershell.exe
1948	powershell.exe
1948	powershell.exe
4208	powershell.exe
4208	powershell.exe
4208	powershell.exe
3156	powershell.exe
3156	powershell.exe
3156	powershell.exe
3292	powershell.exe
3292	powershell.exe
3292	powershell.exe
4984	powershell.exe
4984	powershell.exe
4984	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2324	Umbral.exe
Token: SeDebugPrivilege	1948	powershell.exe
Token: SeIncreaseQuotaPrivilege	1948	powershell.exe
Token: SeSecurityPrivilege	1948	powershell.exe
Token: SeTakeOwnershipPrivilege	1948	powershell.exe
Token: SeLoadDriverPrivilege	1948	powershell.exe
Token: SeSystemProfilePrivilege	1948	powershell.exe
Token: SeSystemtimePrivilege	1948	powershell.exe
Token: SeProfSingleProcessPrivilege	1948	powershell.exe
Token: SeIncBasePriorityPrivilege	1948	powershell.exe
Token: SeCreatePagefilePrivilege	1948	powershell.exe
Token: SeBackupPrivilege	1948	powershell.exe
Token: SeRestorePrivilege	1948	powershell.exe
Token: SeShutdownPrivilege	1948	powershell.exe
Token: SeDebugPrivilege	1948	powershell.exe
Token: SeSystemEnvironmentPrivilege	1948	powershell.exe
Token: SeRemoteShutdownPrivilege	1948	powershell.exe
Token: SeUndockPrivilege	1948	powershell.exe
Token: SeManageVolumePrivilege	1948	powershell.exe
Token: 33	1948	powershell.exe
Token: 34	1948	powershell.exe
Token: 35	1948	powershell.exe
Token: 36	1948	powershell.exe
Token: SeDebugPrivilege	4208	powershell.exe
Token: SeDebugPrivilege	3156	powershell.exe
Token: SeDebugPrivilege	3292	powershell.exe
Token: SeIncreaseQuotaPrivilege	1392	wmic.exe
Token: SeSecurityPrivilege	1392	wmic.exe
Token: SeTakeOwnershipPrivilege	1392	wmic.exe
Token: SeLoadDriverPrivilege	1392	wmic.exe
Token: SeSystemProfilePrivilege	1392	wmic.exe
Token: SeSystemtimePrivilege	1392	wmic.exe
Token: SeProfSingleProcessPrivilege	1392	wmic.exe
Token: SeIncBasePriorityPrivilege	1392	wmic.exe
Token: SeCreatePagefilePrivilege	1392	wmic.exe
Token: SeBackupPrivilege	1392	wmic.exe
Token: SeRestorePrivilege	1392	wmic.exe
Token: SeShutdownPrivilege	1392	wmic.exe
Token: SeDebugPrivilege	1392	wmic.exe
Token: SeSystemEnvironmentPrivilege	1392	wmic.exe
Token: SeRemoteShutdownPrivilege	1392	wmic.exe
Token: SeUndockPrivilege	1392	wmic.exe
Token: SeManageVolumePrivilege	1392	wmic.exe
Token: 33	1392	wmic.exe
Token: 34	1392	wmic.exe
Token: 35	1392	wmic.exe
Token: 36	1392	wmic.exe
Token: SeIncreaseQuotaPrivilege	1392	wmic.exe
Token: SeSecurityPrivilege	1392	wmic.exe
Token: SeTakeOwnershipPrivilege	1392	wmic.exe
Token: SeLoadDriverPrivilege	1392	wmic.exe
Token: SeSystemProfilePrivilege	1392	wmic.exe
Token: SeSystemtimePrivilege	1392	wmic.exe
Token: SeProfSingleProcessPrivilege	1392	wmic.exe
Token: SeIncBasePriorityPrivilege	1392	wmic.exe
Token: SeCreatePagefilePrivilege	1392	wmic.exe
Token: SeBackupPrivilege	1392	wmic.exe
Token: SeRestorePrivilege	1392	wmic.exe
Token: SeShutdownPrivilege	1392	wmic.exe
Token: SeDebugPrivilege	1392	wmic.exe
Token: SeSystemEnvironmentPrivilege	1392	wmic.exe
Token: SeRemoteShutdownPrivilege	1392	wmic.exe
Token: SeUndockPrivilege	1392	wmic.exe
Token: SeManageVolumePrivilege	1392	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 596	2324	Umbral.exe	73
PID 2324 wrote to memory of 596	2324	Umbral.exe	73
PID 2324 wrote to memory of 1948	2324	Umbral.exe	75
PID 2324 wrote to memory of 1948	2324	Umbral.exe	75
PID 2324 wrote to memory of 4208	2324	Umbral.exe	78
PID 2324 wrote to memory of 4208	2324	Umbral.exe	78
PID 2324 wrote to memory of 3156	2324	Umbral.exe	80
PID 2324 wrote to memory of 3156	2324	Umbral.exe	80
PID 2324 wrote to memory of 3292	2324	Umbral.exe	82
PID 2324 wrote to memory of 3292	2324	Umbral.exe	82
PID 2324 wrote to memory of 1392	2324	Umbral.exe	84
PID 2324 wrote to memory of 1392	2324	Umbral.exe	84
PID 2324 wrote to memory of 4480	2324	Umbral.exe	87
PID 2324 wrote to memory of 4480	2324	Umbral.exe	87
PID 2324 wrote to memory of 5104	2324	Umbral.exe	89
PID 2324 wrote to memory of 5104	2324	Umbral.exe	89
PID 2324 wrote to memory of 4984	2324	Umbral.exe	91
PID 2324 wrote to memory of 4984	2324	Umbral.exe	91
PID 2324 wrote to memory of 216	2324	Umbral.exe	93
PID 2324 wrote to memory of 216	2324	Umbral.exe	93
PID 2324 wrote to memory of 3008	2324	Umbral.exe	95
PID 2324 wrote to memory of 3008	2324	Umbral.exe	95
PID 3008 wrote to memory of 4960	3008	cmd.exe	97
PID 3008 wrote to memory of 4960	3008	cmd.exe	97

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
596	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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:596
- 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:1948
- 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:4208
- 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:3156
- 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:3292
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1392
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:5104
- 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:4984
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:216
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3008
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4960

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
ad5cd538ca58cb28ede39c108acb5785

SHA1
1ae910026f3dbe90ed025e9e96ead2b5399be877

SHA256
c9e6cb04d6c893458d5a7e12eb575cf97c3172f5e312b1f63a667cbbc5f0c033

SHA512
c066c5d9b276a68fa636647bb29aea05bfa2292217bc77f5324d9c1d93117772ee8277e1f7cff91ec8d6b7c05ca078f929cecfdbb09582522a9067f54740af13

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
e9d2d14e856c8107b2da1b4d54acd802

SHA1
9ab68c3abee490d1418df8ecd42d57237232672d

SHA256
4169e453fa3078623937db4268da606deb7104803ca0d1133295992ef3107e87

SHA512
0312972ed4f1870f4219601c62eed1c59379360da6c8e2f0cbcd0dfd327967276b71170bc1631f18d7da651fcc6cb66fa5039f6301f1d36382bbb36b8877440a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
e93982ac2d28c20d1351d3619ddff71e

SHA1
3e47c26610e24fb2a9363b116a3be7ab34f25d67

SHA256
13a73d7b8b6d2a7c5bbaf6a36f5e3c81262931fe52b83192ec571b343bafb7a6

SHA512
a8aed4d03dc31e049240de7603626487ede298d240b2f617f4d0df11c69e8c1e8a393e93432b322af964b64524f9d967dd89bb95a572fdd8f9c7e0381883c0bf

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
d26e61b05e1a82bc1ed5078b6f020fbb

SHA1
5a7b374a664e5975e3aacab00e30fb499bbc5dd8

SHA256
7788aceab7325c7eaeb0c7c6ef1def257f8ffe731874f9b9d3247590528b6011

SHA512
75bfdbfc5e79404951e82448f68cb14b70091ba5abf4119029c826b403ca30d0612d3ab8cdb8190f1c8269ccd5cea27e17736b123990c96557d1cbb61f1a5f1c

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
134c6647f636b28e090bd423336912d4

SHA1
915be716734666c659e322c22807210f280b2bcb

SHA256
83b9a01b608f85103c8b6c060582770cbc034218b2c50d434d0d2f3f2d5ba487

SHA512
d1c809f3e395f0e87de07c5567e3bc16520a9662b304a562944cdb020bfffe21c7e39f48b7719e509f3348e45d6604d0c6046f445409673b4db773d9e157b88e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xfhc2tes.45u.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/1948-50-0x00007FFF7A120000-0x00007FFF7AB0C000-memory.dmp

Filesize
9.9MB

Download
memory/1948-7-0x00007FFF7A120000-0x00007FFF7AB0C000-memory.dmp

Filesize
9.9MB

Download
memory/1948-10-0x00007FFF7A120000-0x00007FFF7AB0C000-memory.dmp

Filesize
9.9MB

Download
memory/1948-43-0x00007FFF7A120000-0x00007FFF7AB0C000-memory.dmp

Filesize
9.9MB

Download
memory/1948-13-0x000002537CF70000-0x000002537CFE6000-memory.dmp

Filesize
472KB

Download
memory/1948-54-0x00007FFF7A120000-0x00007FFF7AB0C000-memory.dmp

Filesize
9.9MB

Download
memory/1948-9-0x00007FFF7A120000-0x00007FFF7AB0C000-memory.dmp

Filesize
9.9MB

Download
memory/1948-8-0x000002537CC90000-0x000002537CCB2000-memory.dmp

Filesize
136KB

Download
memory/2324-87-0x000002B462A10000-0x000002B462A60000-memory.dmp

Filesize
320KB

Download
memory/2324-88-0x000002B44A2D0000-0x000002B44A2EE000-memory.dmp

Filesize
120KB

Download
memory/2324-0-0x000002B448460000-0x000002B4484A0000-memory.dmp

Filesize
256KB

Download
memory/2324-2-0x00007FFF7A120000-0x00007FFF7AB0C000-memory.dmp

Filesize
9.9MB

Download
memory/2324-155-0x000002B44A310000-0x000002B44A322000-memory.dmp

Filesize
72KB

Download
memory/2324-154-0x000002B4488F0000-0x000002B4488FA000-memory.dmp

Filesize
40KB

Download
memory/2324-1-0x00007FFF7A123000-0x00007FFF7A124000-memory.dmp

Filesize
4KB

Download
memory/2324-185-0x00007FFF7A120000-0x00007FFF7AB0C000-memory.dmp

Filesize
9.9MB

Download