umbral | 44a1693b64e6cb0054ab2d7188af6c9f213ba2a65cf278b6f3857ab462cf30a2

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-01-2025 03:01

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General

Target

Umbral.exe
Size

230KB
MD5

38b42800e087dcee9961a8e80318d6f2
SHA1

36893cfd322a6021d8048ca6971fc094de6a9f7c
SHA256

44a1693b64e6cb0054ab2d7188af6c9f213ba2a65cf278b6f3857ab462cf30a2
SHA512

5c1d1065e8d076abeabe473f184e7561a2bc9b8b1486b3bff7540e736aa700a93a4879f97f70e176044089ca6eb0462725f26cdd3cb78190de62a62252cb6039
SSDEEP

6144:uloZM+rIkd8g+EtXHkv/iD4K8Nqbw2xpapPyAxVkK6b8e1myui:4oZtL+EP83Nqbw2xpapPyAxVkdXD

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1612-1-0x0000026D6EE80000-0x0000026D6EEC0000-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
4560	powershell.exe
768	powershell.exe
3340	powershell.exe
4068	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
20	discord.com
21	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

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
2144	PING.EXE
2200	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
444	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2144	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1612	Umbral.exe
4560	powershell.exe
4560	powershell.exe
768	powershell.exe
768	powershell.exe
3340	powershell.exe
3340	powershell.exe
4884	powershell.exe
4884	powershell.exe
4068	powershell.exe
4068	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1612	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3880	wmic.exe
Token: SeSecurityPrivilege	3880	wmic.exe
Token: SeTakeOwnershipPrivilege	3880	wmic.exe
Token: SeLoadDriverPrivilege	3880	wmic.exe
Token: SeSystemProfilePrivilege	3880	wmic.exe
Token: SeSystemtimePrivilege	3880	wmic.exe
Token: SeProfSingleProcessPrivilege	3880	wmic.exe
Token: SeIncBasePriorityPrivilege	3880	wmic.exe
Token: SeCreatePagefilePrivilege	3880	wmic.exe
Token: SeBackupPrivilege	3880	wmic.exe
Token: SeRestorePrivilege	3880	wmic.exe
Token: SeShutdownPrivilege	3880	wmic.exe
Token: SeDebugPrivilege	3880	wmic.exe
Token: SeSystemEnvironmentPrivilege	3880	wmic.exe
Token: SeRemoteShutdownPrivilege	3880	wmic.exe
Token: SeUndockPrivilege	3880	wmic.exe
Token: SeManageVolumePrivilege	3880	wmic.exe
Token: 33	3880	wmic.exe
Token: 34	3880	wmic.exe
Token: 35	3880	wmic.exe
Token: 36	3880	wmic.exe
Token: SeIncreaseQuotaPrivilege	3880	wmic.exe
Token: SeSecurityPrivilege	3880	wmic.exe
Token: SeTakeOwnershipPrivilege	3880	wmic.exe
Token: SeLoadDriverPrivilege	3880	wmic.exe
Token: SeSystemProfilePrivilege	3880	wmic.exe
Token: SeSystemtimePrivilege	3880	wmic.exe
Token: SeProfSingleProcessPrivilege	3880	wmic.exe
Token: SeIncBasePriorityPrivilege	3880	wmic.exe
Token: SeCreatePagefilePrivilege	3880	wmic.exe
Token: SeBackupPrivilege	3880	wmic.exe
Token: SeRestorePrivilege	3880	wmic.exe
Token: SeShutdownPrivilege	3880	wmic.exe
Token: SeDebugPrivilege	3880	wmic.exe
Token: SeSystemEnvironmentPrivilege	3880	wmic.exe
Token: SeRemoteShutdownPrivilege	3880	wmic.exe
Token: SeUndockPrivilege	3880	wmic.exe
Token: SeManageVolumePrivilege	3880	wmic.exe
Token: 33	3880	wmic.exe
Token: 34	3880	wmic.exe
Token: 35	3880	wmic.exe
Token: 36	3880	wmic.exe
Token: SeDebugPrivilege	4560	powershell.exe
Token: SeDebugPrivilege	768	powershell.exe
Token: SeDebugPrivilege	3340	powershell.exe
Token: SeDebugPrivilege	4884	powershell.exe
Token: SeIncreaseQuotaPrivilege	4248	wmic.exe
Token: SeSecurityPrivilege	4248	wmic.exe
Token: SeTakeOwnershipPrivilege	4248	wmic.exe
Token: SeLoadDriverPrivilege	4248	wmic.exe
Token: SeSystemProfilePrivilege	4248	wmic.exe
Token: SeSystemtimePrivilege	4248	wmic.exe
Token: SeProfSingleProcessPrivilege	4248	wmic.exe
Token: SeIncBasePriorityPrivilege	4248	wmic.exe
Token: SeCreatePagefilePrivilege	4248	wmic.exe
Token: SeBackupPrivilege	4248	wmic.exe
Token: SeRestorePrivilege	4248	wmic.exe
Token: SeShutdownPrivilege	4248	wmic.exe
Token: SeDebugPrivilege	4248	wmic.exe
Token: SeSystemEnvironmentPrivilege	4248	wmic.exe
Token: SeRemoteShutdownPrivilege	4248	wmic.exe
Token: SeUndockPrivilege	4248	wmic.exe
Token: SeManageVolumePrivilege	4248	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1612 wrote to memory of 3880	1612	Umbral.exe	82
PID 1612 wrote to memory of 3880	1612	Umbral.exe	82
PID 1612 wrote to memory of 2836	1612	Umbral.exe	85
PID 1612 wrote to memory of 2836	1612	Umbral.exe	85
PID 1612 wrote to memory of 4560	1612	Umbral.exe	87
PID 1612 wrote to memory of 4560	1612	Umbral.exe	87
PID 1612 wrote to memory of 768	1612	Umbral.exe	89
PID 1612 wrote to memory of 768	1612	Umbral.exe	89
PID 1612 wrote to memory of 3340	1612	Umbral.exe	91
PID 1612 wrote to memory of 3340	1612	Umbral.exe	91
PID 1612 wrote to memory of 4884	1612	Umbral.exe	93
PID 1612 wrote to memory of 4884	1612	Umbral.exe	93
PID 1612 wrote to memory of 4248	1612	Umbral.exe	95
PID 1612 wrote to memory of 4248	1612	Umbral.exe	95
PID 1612 wrote to memory of 1280	1612	Umbral.exe	97
PID 1612 wrote to memory of 1280	1612	Umbral.exe	97
PID 1612 wrote to memory of 2060	1612	Umbral.exe	99
PID 1612 wrote to memory of 2060	1612	Umbral.exe	99
PID 1612 wrote to memory of 4068	1612	Umbral.exe	101
PID 1612 wrote to memory of 4068	1612	Umbral.exe	101
PID 1612 wrote to memory of 444	1612	Umbral.exe	103
PID 1612 wrote to memory of 444	1612	Umbral.exe	103
PID 1612 wrote to memory of 2200	1612	Umbral.exe	105
PID 1612 wrote to memory of 2200	1612	Umbral.exe	105
PID 2200 wrote to memory of 2144	2200	cmd.exe	107
PID 2200 wrote to memory of 2144	2200	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2836	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:1612
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3880
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2836
- 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:4560
- 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:768
- 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:3340
- 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:4884
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4248
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1280
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2060
- 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:4068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:444
- 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:2200
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2144

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
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
39c2ac09b52b0685c7da5b25746d8a64

SHA1
c0ac1559da69dc9ad0496c11ce37ef9b907ea656

SHA256
c582429e23c81918907db9c7f32bef2d32c873f2da84fa450707482408e3a160

SHA512
9a6f4c5944cecdd6cf2114f7db583e4742a93b3c9eec6fd60328585370a8ba2f917f7ce689c0341d2dbf391f58ff34ee0088d9d2158ebb2450c547257da095a1

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
dcac964589fef8f1dd8c401fc212ad5c

SHA1
f518a7cfe430e90f61b5180133b1bc644e7e535f

SHA256
658c2ff03e1d130ea4862b82e47c240161a74c70cf3a957568f521507486692e

SHA512
b9b9a9b1afe65d9cd9f8a6c243363b7a1425677845c280d5dc4b01627009e73c0cdbec7418107839e832b8f2ece675233c8b4ef4cb4436e8464fca20ceda7871

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_e2ccym2t.nxt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1612-72-0x0000026D70B80000-0x0000026D70B8A000-memory.dmp

Filesize
40KB

Download
memory/1612-35-0x0000026D70AF0000-0x0000026D70B0E000-memory.dmp

Filesize
120KB

Download
memory/1612-93-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/1612-73-0x0000026D70C40000-0x0000026D70C52000-memory.dmp

Filesize
72KB

Download
memory/1612-2-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/1612-33-0x0000026D70BC0000-0x0000026D70C36000-memory.dmp

Filesize
472KB

Download
memory/1612-34-0x0000026D70B30000-0x0000026D70B80000-memory.dmp

Filesize
320KB

Download
memory/1612-0-0x00007FF868443000-0x00007FF868445000-memory.dmp

Filesize
8KB

Download
memory/1612-1-0x0000026D6EE80000-0x0000026D6EEC0000-memory.dmp

Filesize
256KB

Download
memory/4560-15-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/4560-10-0x00000169EEAA0000-0x00000169EEAC2000-memory.dmp

Filesize
136KB

Download
memory/4560-3-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/4560-12-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download
memory/4560-18-0x00007FF868440000-0x00007FF868F01000-memory.dmp

Filesize
10.8MB

Download