umbral | 256aa419764dc6cf6fef1a4bbe7a918c207c48515e9e13d18881a69b326c79f0

Resubmissions

26-07-2024 22:22

240726-2ap5aaycqq 10

Analysis

max time kernel
90s
max time network
96s
platform
windows11-21h2_x64
resource
win11-20240709-en
resource tags

arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system
submitted
26-07-2024 22:22

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General

Target

Umbral.exe
Size

229KB
MD5

7b8f7224e44d39c521160c3b33e22e98
SHA1

a8ab775e550aef4aa3b2f485116bcc245c7ccb48
SHA256

256aa419764dc6cf6fef1a4bbe7a918c207c48515e9e13d18881a69b326c79f0
SHA512

c11c922edb6d3aa634fd68dc59a86463fd29b27eead95864efc003fcbb226610854f3acceff7b580fb96443952aa68696f87ea4004e01af96eca570a75359859
SSDEEP

6144:tloZM9rIkd8g+EtXHkv/iD4u5PpSQPL42BECDja/yb8e1mUZJi:voZmL+EP8u5PpSQPL42BECDjamp+

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral4/memory/1068-1-0x000002389DEC0000-0x000002389DF00000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2124	powershell.exe
1324	powershell.exe
3920	powershell.exe
5024	powershell.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
4	discord.com
6	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
1	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
2360	PING.EXE
3368	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2768	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2360	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1068	Umbral.exe
5024	powershell.exe
5024	powershell.exe
2124	powershell.exe
2124	powershell.exe
1324	powershell.exe
1324	powershell.exe
2372	powershell.exe
2372	powershell.exe
3920	powershell.exe
3920	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1068	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3336	wmic.exe
Token: SeSecurityPrivilege	3336	wmic.exe
Token: SeTakeOwnershipPrivilege	3336	wmic.exe
Token: SeLoadDriverPrivilege	3336	wmic.exe
Token: SeSystemProfilePrivilege	3336	wmic.exe
Token: SeSystemtimePrivilege	3336	wmic.exe
Token: SeProfSingleProcessPrivilege	3336	wmic.exe
Token: SeIncBasePriorityPrivilege	3336	wmic.exe
Token: SeCreatePagefilePrivilege	3336	wmic.exe
Token: SeBackupPrivilege	3336	wmic.exe
Token: SeRestorePrivilege	3336	wmic.exe
Token: SeShutdownPrivilege	3336	wmic.exe
Token: SeDebugPrivilege	3336	wmic.exe
Token: SeSystemEnvironmentPrivilege	3336	wmic.exe
Token: SeRemoteShutdownPrivilege	3336	wmic.exe
Token: SeUndockPrivilege	3336	wmic.exe
Token: SeManageVolumePrivilege	3336	wmic.exe
Token: 33	3336	wmic.exe
Token: 34	3336	wmic.exe
Token: 35	3336	wmic.exe
Token: 36	3336	wmic.exe
Token: SeIncreaseQuotaPrivilege	3336	wmic.exe
Token: SeSecurityPrivilege	3336	wmic.exe
Token: SeTakeOwnershipPrivilege	3336	wmic.exe
Token: SeLoadDriverPrivilege	3336	wmic.exe
Token: SeSystemProfilePrivilege	3336	wmic.exe
Token: SeSystemtimePrivilege	3336	wmic.exe
Token: SeProfSingleProcessPrivilege	3336	wmic.exe
Token: SeIncBasePriorityPrivilege	3336	wmic.exe
Token: SeCreatePagefilePrivilege	3336	wmic.exe
Token: SeBackupPrivilege	3336	wmic.exe
Token: SeRestorePrivilege	3336	wmic.exe
Token: SeShutdownPrivilege	3336	wmic.exe
Token: SeDebugPrivilege	3336	wmic.exe
Token: SeSystemEnvironmentPrivilege	3336	wmic.exe
Token: SeRemoteShutdownPrivilege	3336	wmic.exe
Token: SeUndockPrivilege	3336	wmic.exe
Token: SeManageVolumePrivilege	3336	wmic.exe
Token: 33	3336	wmic.exe
Token: 34	3336	wmic.exe
Token: 35	3336	wmic.exe
Token: 36	3336	wmic.exe
Token: SeDebugPrivilege	5024	powershell.exe
Token: SeDebugPrivilege	2124	powershell.exe
Token: SeDebugPrivilege	1324	powershell.exe
Token: SeDebugPrivilege	2372	powershell.exe
Token: SeIncreaseQuotaPrivilege	4480	wmic.exe
Token: SeSecurityPrivilege	4480	wmic.exe
Token: SeTakeOwnershipPrivilege	4480	wmic.exe
Token: SeLoadDriverPrivilege	4480	wmic.exe
Token: SeSystemProfilePrivilege	4480	wmic.exe
Token: SeSystemtimePrivilege	4480	wmic.exe
Token: SeProfSingleProcessPrivilege	4480	wmic.exe
Token: SeIncBasePriorityPrivilege	4480	wmic.exe
Token: SeCreatePagefilePrivilege	4480	wmic.exe
Token: SeBackupPrivilege	4480	wmic.exe
Token: SeRestorePrivilege	4480	wmic.exe
Token: SeShutdownPrivilege	4480	wmic.exe
Token: SeDebugPrivilege	4480	wmic.exe
Token: SeSystemEnvironmentPrivilege	4480	wmic.exe
Token: SeRemoteShutdownPrivilege	4480	wmic.exe
Token: SeUndockPrivilege	4480	wmic.exe
Token: SeManageVolumePrivilege	4480	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1068 wrote to memory of 3336	1068	Umbral.exe	82
PID 1068 wrote to memory of 3336	1068	Umbral.exe	82
PID 1068 wrote to memory of 3548	1068	Umbral.exe	85
PID 1068 wrote to memory of 3548	1068	Umbral.exe	85
PID 1068 wrote to memory of 5024	1068	Umbral.exe	87
PID 1068 wrote to memory of 5024	1068	Umbral.exe	87
PID 1068 wrote to memory of 2124	1068	Umbral.exe	89
PID 1068 wrote to memory of 2124	1068	Umbral.exe	89
PID 1068 wrote to memory of 1324	1068	Umbral.exe	91
PID 1068 wrote to memory of 1324	1068	Umbral.exe	91
PID 1068 wrote to memory of 2372	1068	Umbral.exe	93
PID 1068 wrote to memory of 2372	1068	Umbral.exe	93
PID 1068 wrote to memory of 4480	1068	Umbral.exe	95
PID 1068 wrote to memory of 4480	1068	Umbral.exe	95
PID 1068 wrote to memory of 2376	1068	Umbral.exe	97
PID 1068 wrote to memory of 2376	1068	Umbral.exe	97
PID 1068 wrote to memory of 1680	1068	Umbral.exe	99
PID 1068 wrote to memory of 1680	1068	Umbral.exe	99
PID 1068 wrote to memory of 3920	1068	Umbral.exe	101
PID 1068 wrote to memory of 3920	1068	Umbral.exe	101
PID 1068 wrote to memory of 2768	1068	Umbral.exe	103
PID 1068 wrote to memory of 2768	1068	Umbral.exe	103
PID 1068 wrote to memory of 3368	1068	Umbral.exe	105
PID 1068 wrote to memory of 3368	1068	Umbral.exe	105
PID 3368 wrote to memory of 2360	3368	cmd.exe	107
PID 3368 wrote to memory of 2360	3368	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3548	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3336
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:3548
- 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:5024
- 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:2124
- 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:1324
- 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:2372
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2376
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1680
- 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:3920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2768
- 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:3368
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2360

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

Replay Monitor

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Downloads

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

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
ddbf17224eb02adc2627cfaf80e332c2

SHA1
657498a83a4a8d52a4de1ae614a819c9443c3822

SHA256
e42c82c09b37d7406b4165e28393a1159455a42cc67eaaa82af291307a1cb89f

SHA512
5f5a5fce410256ec759e41cf936d9d320f9c06fe748bbdb325a3377bdda0f2a8e4049afb5cd0ee9e8077868bbba6881b73efb84fe24e5306dcd75a259ec293bb

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

Filesize
1KB

MD5
476e01b08c6de2caee0ed102eddab449

SHA1
f479fe165ba63a07b5668d780fcfa298c139c4de

SHA256
553e566756c394e36f401cef5cafc587077e6e3418a31b1423234520f91e81cf

SHA512
79cc8f0f1cd1bdc9ca15391251faf3985b6404efeefe90749b3aee64b175447f6dfbf4d7bc18a9fa4990361f88acd27d79546c5d2df757635a94f4dcf8c850ad

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fgpui0d1.wmp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1068-66-0x00000238B86A0000-0x00000238B86AA000-memory.dmp

Filesize
40KB

Download
memory/1068-32-0x000002389FCE0000-0x000002389FCFE000-memory.dmp

Filesize
120KB

Download
memory/1068-84-0x00007FFC12130000-0x00007FFC12BF2000-memory.dmp

Filesize
10.8MB

Download
memory/1068-67-0x00000238B8760000-0x00000238B8772000-memory.dmp

Filesize
72KB

Download
memory/1068-2-0x00007FFC12130000-0x00007FFC12BF2000-memory.dmp

Filesize
10.8MB

Download
memory/1068-30-0x00000238B86C0000-0x00000238B8736000-memory.dmp

Filesize
472KB

Download
memory/1068-31-0x00000238B8640000-0x00000238B8690000-memory.dmp

Filesize
320KB

Download
memory/1068-0-0x00007FFC12133000-0x00007FFC12135000-memory.dmp

Filesize
8KB

Download
memory/1068-1-0x000002389DEC0000-0x000002389DF00000-memory.dmp

Filesize
256KB

Download
memory/5024-14-0x00007FFC12130000-0x00007FFC12BF2000-memory.dmp

Filesize
10.8MB

Download
memory/5024-4-0x00007FFC12130000-0x00007FFC12BF2000-memory.dmp

Filesize
10.8MB

Download
memory/5024-3-0x00007FFC12130000-0x00007FFC12BF2000-memory.dmp

Filesize
10.8MB

Download
memory/5024-10-0x00000195FFE50000-0x00000195FFE72000-memory.dmp

Filesize
136KB

Download
memory/5024-17-0x00007FFC12130000-0x00007FFC12BF2000-memory.dmp

Filesize
10.8MB

Download