umbral | 72f47523343d7d1ddc198998a6a411686dbfcc5a608314ba400957e369e24ff8

Analysis

max time kernel
17s
max time network
20s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
23-07-2024 20:59

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General

Target

Umbral.exe
Size

227KB
MD5

79ad93ed49ecead23248ec08cc51ecfd
SHA1

06340a50ce4fa06499e37070bbd70d6a0f25786f
SHA256

72f47523343d7d1ddc198998a6a411686dbfcc5a608314ba400957e369e24ff8
SHA512

083fff8df6f2d015cc46a05af331d8eb1dd1b91add76a3b47b818a594bc57a80d167cc6fdb2360de489c52b97e8d042abb207e0133d1a446850504c17ab5ffd7
SSDEEP

6144:eloZM9rIkd8g+EtXHkv/iD4n8jjSQPL4yBECDjazBb8e1mCi:IoZOL+EP8n8jjSQPL4yBECDjaNQ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3936-1-0x0000013E286D0000-0x0000013E28710000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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
5068	powershell.exe
4064	powershell.exe
4880	powershell.exe
516	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
4	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
4948	cmd.exe
1392	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5076	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1392	PING.EXE

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
5068	powershell.exe
5068	powershell.exe
5068	powershell.exe
4064	powershell.exe
4064	powershell.exe
4064	powershell.exe
4880	powershell.exe
4880	powershell.exe
4880	powershell.exe
2488	powershell.exe
2488	powershell.exe
2488	powershell.exe
516	powershell.exe
516	powershell.exe
516	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3936	Umbral.exe
Token: SeDebugPrivilege	5068	powershell.exe
Token: SeIncreaseQuotaPrivilege	5068	powershell.exe
Token: SeSecurityPrivilege	5068	powershell.exe
Token: SeTakeOwnershipPrivilege	5068	powershell.exe
Token: SeLoadDriverPrivilege	5068	powershell.exe
Token: SeSystemProfilePrivilege	5068	powershell.exe
Token: SeSystemtimePrivilege	5068	powershell.exe
Token: SeProfSingleProcessPrivilege	5068	powershell.exe
Token: SeIncBasePriorityPrivilege	5068	powershell.exe
Token: SeCreatePagefilePrivilege	5068	powershell.exe
Token: SeBackupPrivilege	5068	powershell.exe
Token: SeRestorePrivilege	5068	powershell.exe
Token: SeShutdownPrivilege	5068	powershell.exe
Token: SeDebugPrivilege	5068	powershell.exe
Token: SeSystemEnvironmentPrivilege	5068	powershell.exe
Token: SeRemoteShutdownPrivilege	5068	powershell.exe
Token: SeUndockPrivilege	5068	powershell.exe
Token: SeManageVolumePrivilege	5068	powershell.exe
Token: 33	5068	powershell.exe
Token: 34	5068	powershell.exe
Token: 35	5068	powershell.exe
Token: 36	5068	powershell.exe
Token: SeDebugPrivilege	4064	powershell.exe
Token: SeDebugPrivilege	4880	powershell.exe
Token: SeDebugPrivilege	2488	powershell.exe
Token: SeIncreaseQuotaPrivilege	4300	wmic.exe
Token: SeSecurityPrivilege	4300	wmic.exe
Token: SeTakeOwnershipPrivilege	4300	wmic.exe
Token: SeLoadDriverPrivilege	4300	wmic.exe
Token: SeSystemProfilePrivilege	4300	wmic.exe
Token: SeSystemtimePrivilege	4300	wmic.exe
Token: SeProfSingleProcessPrivilege	4300	wmic.exe
Token: SeIncBasePriorityPrivilege	4300	wmic.exe
Token: SeCreatePagefilePrivilege	4300	wmic.exe
Token: SeBackupPrivilege	4300	wmic.exe
Token: SeRestorePrivilege	4300	wmic.exe
Token: SeShutdownPrivilege	4300	wmic.exe
Token: SeDebugPrivilege	4300	wmic.exe
Token: SeSystemEnvironmentPrivilege	4300	wmic.exe
Token: SeRemoteShutdownPrivilege	4300	wmic.exe
Token: SeUndockPrivilege	4300	wmic.exe
Token: SeManageVolumePrivilege	4300	wmic.exe
Token: 33	4300	wmic.exe
Token: 34	4300	wmic.exe
Token: 35	4300	wmic.exe
Token: 36	4300	wmic.exe
Token: SeIncreaseQuotaPrivilege	4300	wmic.exe
Token: SeSecurityPrivilege	4300	wmic.exe
Token: SeTakeOwnershipPrivilege	4300	wmic.exe
Token: SeLoadDriverPrivilege	4300	wmic.exe
Token: SeSystemProfilePrivilege	4300	wmic.exe
Token: SeSystemtimePrivilege	4300	wmic.exe
Token: SeProfSingleProcessPrivilege	4300	wmic.exe
Token: SeIncBasePriorityPrivilege	4300	wmic.exe
Token: SeCreatePagefilePrivilege	4300	wmic.exe
Token: SeBackupPrivilege	4300	wmic.exe
Token: SeRestorePrivilege	4300	wmic.exe
Token: SeShutdownPrivilege	4300	wmic.exe
Token: SeDebugPrivilege	4300	wmic.exe
Token: SeSystemEnvironmentPrivilege	4300	wmic.exe
Token: SeRemoteShutdownPrivilege	4300	wmic.exe
Token: SeUndockPrivilege	4300	wmic.exe
Token: SeManageVolumePrivilege	4300	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3936 wrote to memory of 4288	3936	Umbral.exe	74
PID 3936 wrote to memory of 4288	3936	Umbral.exe	74
PID 3936 wrote to memory of 5068	3936	Umbral.exe	76
PID 3936 wrote to memory of 5068	3936	Umbral.exe	76
PID 3936 wrote to memory of 4064	3936	Umbral.exe	79
PID 3936 wrote to memory of 4064	3936	Umbral.exe	79
PID 3936 wrote to memory of 4880	3936	Umbral.exe	81
PID 3936 wrote to memory of 4880	3936	Umbral.exe	81
PID 3936 wrote to memory of 2488	3936	Umbral.exe	83
PID 3936 wrote to memory of 2488	3936	Umbral.exe	83
PID 3936 wrote to memory of 4300	3936	Umbral.exe	85
PID 3936 wrote to memory of 4300	3936	Umbral.exe	85
PID 3936 wrote to memory of 4452	3936	Umbral.exe	88
PID 3936 wrote to memory of 4452	3936	Umbral.exe	88
PID 3936 wrote to memory of 4056	3936	Umbral.exe	90
PID 3936 wrote to memory of 4056	3936	Umbral.exe	90
PID 3936 wrote to memory of 516	3936	Umbral.exe	92
PID 3936 wrote to memory of 516	3936	Umbral.exe	92
PID 3936 wrote to memory of 5076	3936	Umbral.exe	94
PID 3936 wrote to memory of 5076	3936	Umbral.exe	94
PID 3936 wrote to memory of 4948	3936	Umbral.exe	96
PID 3936 wrote to memory of 4948	3936	Umbral.exe	96
PID 4948 wrote to memory of 1392	4948	cmd.exe	98
PID 4948 wrote to memory of 1392	4948	cmd.exe	98

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4288	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:3936
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4288
- 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:5068
- 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:4064
- 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:4880
- 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:2488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4300
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4452
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4056
- 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:516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5076
- 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:4948
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1392

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
ad5cd538ca58cb28ede39c108acb5785

SHA1
1ae910026f3dbe90ed025e9e96ead2b5399be877

SHA256
c9e6cb04d6c893458d5a7e12eb575cf97c3172f5e312b1f63a667cbbc5f0c033

SHA512
c066c5d9b276a68fa636647bb29aea05bfa2292217bc77f5324d9c1d93117772ee8277e1f7cff91ec8d6b7c05ca078f929cecfdbb09582522a9067f54740af13

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

Filesize
1KB

MD5
090db2fbe69b92777594de801503c896

SHA1
d161c5e58bffe0157c2446e542d08c7bcbdc04c6

SHA256
e152b418dbf092eddd0e918f99570516fcda3138748a72c1947d748fbe60c355

SHA512
647326f687bc71b5c0b1b051fb81d60b7f498ac19f44470bb46455771f4a4798e4862e677f46e0dbaa90052232a6b260aca2e0ff2adb5a6184f8c6ffe63f1b05

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

Filesize
1KB

MD5
fa66c7a80de4dff281c01ef5d6c9160c

SHA1
036f1e7c0ab0377b68a723838cbb25788fe8d21b

SHA256
f9cd0ea6cb1bbd26ec56860a61be241516d7a7a57a233605a51d2f2531461fbe

SHA512
5e8e7ea5c1e1463a14b62f321d25507b102a5965516d97a061fe2a3ee9d3680ca4d559226b043f75897fd3af724d8442eed5245fb1bf12290f9d74ea3b8d1274

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

Filesize
1KB

MD5
fb5eacf23b5670f4fa1c1f1f182cccbd

SHA1
ea58bfa70b2b08830bcd26476817270b3682a430

SHA256
8863df312c68b9a1ffb8f353e0c924c24627a3b24c82ce7813d6c803cd46e055

SHA512
6502abcf42f8cd2613cae3a9a274f7ebd206ba6fe99f4f8737068b879e0a5fcf1043ab24838c446f66180ab1e4555ba685405d851df7af2fa76dee2909ae22a0

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

Filesize
1KB

MD5
2f2b1597f7233fdb0a3caad308d342dc

SHA1
d5e2a8c197d062740de6b372d7b4e9b93b6f2635

SHA256
88d269d917bf1974414a67945283569a3c42b9cd71bb1c595f40f8d8f86ed6d3

SHA512
5674cb196eda7c2f64c2da7f03c1b039407dc631dd85d4edfa191e21842ad5ee1f05d97f36df3be483146c8808186eead783dbf80a5c2c6c2bb46986d2ea72e0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w312sncw.cqv.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/3936-182-0x00007FFB66330000-0x00007FFB66D1C000-memory.dmp

Filesize
9.9MB

Download
memory/3936-152-0x0000013E42E10000-0x0000013E42E22000-memory.dmp

Filesize
72KB

Download
memory/3936-151-0x0000013E2A460000-0x0000013E2A46A000-memory.dmp

Filesize
40KB

Download
memory/3936-0-0x00007FFB66333000-0x00007FFB66334000-memory.dmp

Filesize
4KB

Download
memory/3936-86-0x0000013E2A4B0000-0x0000013E2A500000-memory.dmp

Filesize
320KB

Download
memory/3936-87-0x0000013E2A430000-0x0000013E2A44E000-memory.dmp

Filesize
120KB

Download
memory/3936-2-0x00007FFB66330000-0x00007FFB66D1C000-memory.dmp

Filesize
9.9MB

Download
memory/3936-1-0x0000013E286D0000-0x0000013E28710000-memory.dmp

Filesize
256KB

Download
memory/5068-11-0x00007FFB66330000-0x00007FFB66D1C000-memory.dmp

Filesize
9.9MB

Download
memory/5068-53-0x00007FFB66330000-0x00007FFB66D1C000-memory.dmp

Filesize
9.9MB

Download
memory/5068-49-0x00007FFB66330000-0x00007FFB66D1C000-memory.dmp

Filesize
9.9MB

Download
memory/5068-42-0x00007FFB66330000-0x00007FFB66D1C000-memory.dmp

Filesize
9.9MB

Download
memory/5068-13-0x00007FFB66330000-0x00007FFB66D1C000-memory.dmp

Filesize
9.9MB

Download
memory/5068-12-0x000002D1FBA40000-0x000002D1FBAB6000-memory.dmp

Filesize
472KB

Download
memory/5068-8-0x00007FFB66330000-0x00007FFB66D1C000-memory.dmp

Filesize
9.9MB

Download
memory/5068-7-0x000002D1FB870000-0x000002D1FB892000-memory.dmp

Filesize
136KB

Download