umbral | a89f3d297cbac8b605cd554dd0ea7891c7fcff9e63c7c22810d1c8121fd128b1

Analysis

max time kernel
143s
max time network
125s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
03-05-2024 20:19

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General

Target

Umbral.exe
Size

229KB
MD5

dd294f4a30b78637d2de6ae794442508
SHA1

2f28200fb482bb7f280ecde35070b8bf181900ef
SHA256

a89f3d297cbac8b605cd554dd0ea7891c7fcff9e63c7c22810d1c8121fd128b1
SHA512

cc4343ab3d9dc6f6eb8312a28df24442280144d3c54fe3fca65412b6285ae98c264a67a70a86b1fd73418bee535ea5adbe968e7b48a40ad833beaabf459d7bf5
SSDEEP

6144:1loZMLrIkd8g+EtXHkv/iD4n9ruuMzvERlwOffu2/b8e1mR6i:XoZ0L+EP8n9ruuMzvERlwOffuYK

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2180-0-0x000001D0D3C90000-0x000001D0D3CD0000-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
4864	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
37	discord.com
38	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5012	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2180	Umbral.exe
4864	powershell.exe
4864	powershell.exe
3728	powershell.exe
3728	powershell.exe
1520	powershell.exe
1520	powershell.exe
1408	powershell.exe
1408	powershell.exe
2412	powershell.exe
2412	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2180	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4716	wmic.exe
Token: SeSecurityPrivilege	4716	wmic.exe
Token: SeTakeOwnershipPrivilege	4716	wmic.exe
Token: SeLoadDriverPrivilege	4716	wmic.exe
Token: SeSystemProfilePrivilege	4716	wmic.exe
Token: SeSystemtimePrivilege	4716	wmic.exe
Token: SeProfSingleProcessPrivilege	4716	wmic.exe
Token: SeIncBasePriorityPrivilege	4716	wmic.exe
Token: SeCreatePagefilePrivilege	4716	wmic.exe
Token: SeBackupPrivilege	4716	wmic.exe
Token: SeRestorePrivilege	4716	wmic.exe
Token: SeShutdownPrivilege	4716	wmic.exe
Token: SeDebugPrivilege	4716	wmic.exe
Token: SeSystemEnvironmentPrivilege	4716	wmic.exe
Token: SeRemoteShutdownPrivilege	4716	wmic.exe
Token: SeUndockPrivilege	4716	wmic.exe
Token: SeManageVolumePrivilege	4716	wmic.exe
Token: 33	4716	wmic.exe
Token: 34	4716	wmic.exe
Token: 35	4716	wmic.exe
Token: 36	4716	wmic.exe
Token: SeIncreaseQuotaPrivilege	4716	wmic.exe
Token: SeSecurityPrivilege	4716	wmic.exe
Token: SeTakeOwnershipPrivilege	4716	wmic.exe
Token: SeLoadDriverPrivilege	4716	wmic.exe
Token: SeSystemProfilePrivilege	4716	wmic.exe
Token: SeSystemtimePrivilege	4716	wmic.exe
Token: SeProfSingleProcessPrivilege	4716	wmic.exe
Token: SeIncBasePriorityPrivilege	4716	wmic.exe
Token: SeCreatePagefilePrivilege	4716	wmic.exe
Token: SeBackupPrivilege	4716	wmic.exe
Token: SeRestorePrivilege	4716	wmic.exe
Token: SeShutdownPrivilege	4716	wmic.exe
Token: SeDebugPrivilege	4716	wmic.exe
Token: SeSystemEnvironmentPrivilege	4716	wmic.exe
Token: SeRemoteShutdownPrivilege	4716	wmic.exe
Token: SeUndockPrivilege	4716	wmic.exe
Token: SeManageVolumePrivilege	4716	wmic.exe
Token: 33	4716	wmic.exe
Token: 34	4716	wmic.exe
Token: 35	4716	wmic.exe
Token: 36	4716	wmic.exe
Token: SeDebugPrivilege	4864	powershell.exe
Token: SeDebugPrivilege	3728	powershell.exe
Token: SeDebugPrivilege	1520	powershell.exe
Token: SeDebugPrivilege	1408	powershell.exe
Token: SeIncreaseQuotaPrivilege	3980	wmic.exe
Token: SeSecurityPrivilege	3980	wmic.exe
Token: SeTakeOwnershipPrivilege	3980	wmic.exe
Token: SeLoadDriverPrivilege	3980	wmic.exe
Token: SeSystemProfilePrivilege	3980	wmic.exe
Token: SeSystemtimePrivilege	3980	wmic.exe
Token: SeProfSingleProcessPrivilege	3980	wmic.exe
Token: SeIncBasePriorityPrivilege	3980	wmic.exe
Token: SeCreatePagefilePrivilege	3980	wmic.exe
Token: SeBackupPrivilege	3980	wmic.exe
Token: SeRestorePrivilege	3980	wmic.exe
Token: SeShutdownPrivilege	3980	wmic.exe
Token: SeDebugPrivilege	3980	wmic.exe
Token: SeSystemEnvironmentPrivilege	3980	wmic.exe
Token: SeRemoteShutdownPrivilege	3980	wmic.exe
Token: SeUndockPrivilege	3980	wmic.exe
Token: SeManageVolumePrivilege	3980	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2180 wrote to memory of 4716	2180	Umbral.exe	84
PID 2180 wrote to memory of 4716	2180	Umbral.exe	84
PID 2180 wrote to memory of 4864	2180	Umbral.exe	87
PID 2180 wrote to memory of 4864	2180	Umbral.exe	87
PID 2180 wrote to memory of 3728	2180	Umbral.exe	90
PID 2180 wrote to memory of 3728	2180	Umbral.exe	90
PID 2180 wrote to memory of 1520	2180	Umbral.exe	94
PID 2180 wrote to memory of 1520	2180	Umbral.exe	94
PID 2180 wrote to memory of 1408	2180	Umbral.exe	96
PID 2180 wrote to memory of 1408	2180	Umbral.exe	96
PID 2180 wrote to memory of 3980	2180	Umbral.exe	100
PID 2180 wrote to memory of 3980	2180	Umbral.exe	100
PID 2180 wrote to memory of 2368	2180	Umbral.exe	102
PID 2180 wrote to memory of 2368	2180	Umbral.exe	102
PID 2180 wrote to memory of 116	2180	Umbral.exe	104
PID 2180 wrote to memory of 116	2180	Umbral.exe	104
PID 2180 wrote to memory of 2412	2180	Umbral.exe	106
PID 2180 wrote to memory of 2412	2180	Umbral.exe	106
PID 2180 wrote to memory of 5012	2180	Umbral.exe	109
PID 2180 wrote to memory of 5012	2180	Umbral.exe	109

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:2180
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4716
- 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:4864
- 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:3728
- 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:1520
- 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:1408
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2368
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:116
- 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:2412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5012

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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
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
1a58f982c18490e622e00d4eb75ace5a

SHA1
60c30527b74659ecf09089a5a7c02a1df9a71b65

SHA256
4b7f800c0dea209162cc86627983993127eb20e3f8616646c41cb3ce15d9b39d

SHA512
ddab516a967783c5951717853aa5b3ef6dd5b442db50092888b2e7f3179fc68120fcde69a08d6ab280740eaadb6eadfc758c3118b52706f869e48ac1aebda480

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

Filesize
1KB

MD5
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

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

Filesize
1KB

MD5
401e2433ba6338e47aa49b1d254fae92

SHA1
ccde8ccf7ab162f2c286b0fade504b794bf9e48e

SHA256
7f511887994094051fafd009ae9b8974f7ae5ec28306ed6aa4ec54dadfd12b55

SHA512
e5fed80d17b8afaad388634863d7c64730949c462b59027bca8f6a80113895a00c135557ffcb1f3a3e7f11734ee257a05c4c69482334b372e2cbc66c4c43669d

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tbt3bu0m.alw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2180-34-0x000001D0D5910000-0x000001D0D592E000-memory.dmp

Filesize
120KB

Download
memory/2180-32-0x000001D0EE420000-0x000001D0EE496000-memory.dmp

Filesize
472KB

Download
memory/2180-33-0x000001D0D5960000-0x000001D0D59B0000-memory.dmp

Filesize
320KB

Download
memory/2180-0-0x000001D0D3C90000-0x000001D0D3CD0000-memory.dmp

Filesize
256KB

Download
memory/2180-2-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

Filesize
10.8MB

Download
memory/2180-70-0x000001D0D5950000-0x000001D0D595A000-memory.dmp

Filesize
40KB

Download
memory/2180-71-0x000001D0EE2F0000-0x000001D0EE302000-memory.dmp

Filesize
72KB

Download
memory/2180-1-0x00007FFE318E3000-0x00007FFE318E5000-memory.dmp

Filesize
8KB

Download
memory/2180-89-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

Filesize
10.8MB

Download
memory/4864-17-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

Filesize
10.8MB

Download
memory/4864-14-0x000001D51D510000-0x000001D51D532000-memory.dmp

Filesize
136KB

Download
memory/4864-4-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

Filesize
10.8MB

Download
memory/4864-3-0x00007FFE318E0000-0x00007FFE323A1000-memory.dmp

Filesize
10.8MB

Download