umbral | d59f40a7e459e4f03cfafe017c0f9433714f8530757a674976a5dcc2bc68618d

Analysis

max time kernel
91s
max time network
95s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
29-11-2024 17:43

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General

Target

Umbral.exe
Size

230KB
MD5

d36aaa797c0db93779d1e7d23deb0ea1
SHA1

8c43cdc2bbd58bde7e445a9b26a745d091c93c5c
SHA256

d59f40a7e459e4f03cfafe017c0f9433714f8530757a674976a5dcc2bc68618d
SHA512

cf192d81fb909a91b989e50b7c0bb1092f130b3394b4205ce46afa9f2070f17a6461366dbad7bbc721d8449facaf2864203d274afcd95b65d3420070c0adb9e7
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4OGsLCg/7IiR0STTKEJ/b8e1mVni:noZtL+EP8OGsLCg/7IiR0STTKE1r

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3076-1-0x0000027A0BD20000-0x0000027A0BD60000-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
2876	powershell.exe
1648	powershell.exe
4196	powershell.exe
4036	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
1	discord.com
5	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
3668	cmd.exe
3612	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1200	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3612	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3076	Umbral.exe
2876	powershell.exe
2876	powershell.exe
1648	powershell.exe
1648	powershell.exe
4196	powershell.exe
4196	powershell.exe
2900	powershell.exe
2900	powershell.exe
4036	powershell.exe
4036	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3076	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2568	wmic.exe
Token: SeSecurityPrivilege	2568	wmic.exe
Token: SeTakeOwnershipPrivilege	2568	wmic.exe
Token: SeLoadDriverPrivilege	2568	wmic.exe
Token: SeSystemProfilePrivilege	2568	wmic.exe
Token: SeSystemtimePrivilege	2568	wmic.exe
Token: SeProfSingleProcessPrivilege	2568	wmic.exe
Token: SeIncBasePriorityPrivilege	2568	wmic.exe
Token: SeCreatePagefilePrivilege	2568	wmic.exe
Token: SeBackupPrivilege	2568	wmic.exe
Token: SeRestorePrivilege	2568	wmic.exe
Token: SeShutdownPrivilege	2568	wmic.exe
Token: SeDebugPrivilege	2568	wmic.exe
Token: SeSystemEnvironmentPrivilege	2568	wmic.exe
Token: SeRemoteShutdownPrivilege	2568	wmic.exe
Token: SeUndockPrivilege	2568	wmic.exe
Token: SeManageVolumePrivilege	2568	wmic.exe
Token: 33	2568	wmic.exe
Token: 34	2568	wmic.exe
Token: 35	2568	wmic.exe
Token: 36	2568	wmic.exe
Token: SeIncreaseQuotaPrivilege	2568	wmic.exe
Token: SeSecurityPrivilege	2568	wmic.exe
Token: SeTakeOwnershipPrivilege	2568	wmic.exe
Token: SeLoadDriverPrivilege	2568	wmic.exe
Token: SeSystemProfilePrivilege	2568	wmic.exe
Token: SeSystemtimePrivilege	2568	wmic.exe
Token: SeProfSingleProcessPrivilege	2568	wmic.exe
Token: SeIncBasePriorityPrivilege	2568	wmic.exe
Token: SeCreatePagefilePrivilege	2568	wmic.exe
Token: SeBackupPrivilege	2568	wmic.exe
Token: SeRestorePrivilege	2568	wmic.exe
Token: SeShutdownPrivilege	2568	wmic.exe
Token: SeDebugPrivilege	2568	wmic.exe
Token: SeSystemEnvironmentPrivilege	2568	wmic.exe
Token: SeRemoteShutdownPrivilege	2568	wmic.exe
Token: SeUndockPrivilege	2568	wmic.exe
Token: SeManageVolumePrivilege	2568	wmic.exe
Token: 33	2568	wmic.exe
Token: 34	2568	wmic.exe
Token: 35	2568	wmic.exe
Token: 36	2568	wmic.exe
Token: SeDebugPrivilege	2876	powershell.exe
Token: SeDebugPrivilege	1648	powershell.exe
Token: SeDebugPrivilege	4196	powershell.exe
Token: SeDebugPrivilege	2900	powershell.exe
Token: SeIncreaseQuotaPrivilege	3216	wmic.exe
Token: SeSecurityPrivilege	3216	wmic.exe
Token: SeTakeOwnershipPrivilege	3216	wmic.exe
Token: SeLoadDriverPrivilege	3216	wmic.exe
Token: SeSystemProfilePrivilege	3216	wmic.exe
Token: SeSystemtimePrivilege	3216	wmic.exe
Token: SeProfSingleProcessPrivilege	3216	wmic.exe
Token: SeIncBasePriorityPrivilege	3216	wmic.exe
Token: SeCreatePagefilePrivilege	3216	wmic.exe
Token: SeBackupPrivilege	3216	wmic.exe
Token: SeRestorePrivilege	3216	wmic.exe
Token: SeShutdownPrivilege	3216	wmic.exe
Token: SeDebugPrivilege	3216	wmic.exe
Token: SeSystemEnvironmentPrivilege	3216	wmic.exe
Token: SeRemoteShutdownPrivilege	3216	wmic.exe
Token: SeUndockPrivilege	3216	wmic.exe
Token: SeManageVolumePrivilege	3216	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3076 wrote to memory of 2568	3076	Umbral.exe	79
PID 3076 wrote to memory of 2568	3076	Umbral.exe	79
PID 3076 wrote to memory of 2136	3076	Umbral.exe	82
PID 3076 wrote to memory of 2136	3076	Umbral.exe	82
PID 3076 wrote to memory of 2876	3076	Umbral.exe	84
PID 3076 wrote to memory of 2876	3076	Umbral.exe	84
PID 3076 wrote to memory of 1648	3076	Umbral.exe	86
PID 3076 wrote to memory of 1648	3076	Umbral.exe	86
PID 3076 wrote to memory of 4196	3076	Umbral.exe	88
PID 3076 wrote to memory of 4196	3076	Umbral.exe	88
PID 3076 wrote to memory of 2900	3076	Umbral.exe	90
PID 3076 wrote to memory of 2900	3076	Umbral.exe	90
PID 3076 wrote to memory of 3216	3076	Umbral.exe	92
PID 3076 wrote to memory of 3216	3076	Umbral.exe	92
PID 3076 wrote to memory of 3844	3076	Umbral.exe	94
PID 3076 wrote to memory of 3844	3076	Umbral.exe	94
PID 3076 wrote to memory of 1624	3076	Umbral.exe	96
PID 3076 wrote to memory of 1624	3076	Umbral.exe	96
PID 3076 wrote to memory of 4036	3076	Umbral.exe	98
PID 3076 wrote to memory of 4036	3076	Umbral.exe	98
PID 3076 wrote to memory of 1200	3076	Umbral.exe	100
PID 3076 wrote to memory of 1200	3076	Umbral.exe	100
PID 3076 wrote to memory of 3668	3076	Umbral.exe	102
PID 3076 wrote to memory of 3668	3076	Umbral.exe	102
PID 3668 wrote to memory of 3612	3668	cmd.exe	104
PID 3668 wrote to memory of 3612	3668	cmd.exe	104

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2136	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:3076
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2568
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2136
- 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:2876
- 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:1648
- 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:4196
- 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:2900
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3216
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3844
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1624
- 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:4036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1200
- 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:3668
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3612

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
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
6bddc96a32b9ed8fc70b141ccf4a39b2

SHA1
0f33c0699da40a5eadcec646791cf21cdb0dd7c6

SHA256
cb3853abe77eb0da8a1caccb49e97a573b6f35570722eb759116a645d724c132

SHA512
e41f1597b4129b759e4199db195df1c24e47cc47dc9850fab2d48e44bc3d37dc3658fbfbb62332a0b93c552587d7fab09de1634f605faa2209b8470c2a6eaca6

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

Filesize
1KB

MD5
57083a8e45ebe4fd84c7c0f137ec3e21

SHA1
857b5ea57f7bcf03cadee122106c6e58792a9b84

SHA256
f20102c4dc409cad3cdaf7a330c3a18a730a9d7d902b9fbee2a84186cba93d40

SHA512
4bbc21c07c05ee1f783242f0fb59324d5ff9ae18bdf892f02980d582fed83380888eeba58e1a6a321507cfd5d4fe82a328a0d3482b29633be4e3ebbeac636f87

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

Filesize
1KB

MD5
59cb742bf23f733732c168ea38c5fae1

SHA1
ea5d799304f061f12b421eb9c0c08e0c470ec2f9

SHA256
fbfc9a8d8963981cb6b86ea6dbae33598df74c6b60b43c7e8f0c1929183e6396

SHA512
2b88e2c7db7e5a21d59393f48c6fe194306fd88337c930fe37065178e9fc215bc347d6bdc4ef2647748e93cf605bc3daabe46f5681857f0ebee3c673bddb72fa

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tr0xw5i0.l2i.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2876-12-0x0000019AC5320000-0x0000019AC5342000-memory.dmp

Filesize
136KB

Download
memory/2876-13-0x00007FFC080E0000-0x00007FFC08BA2000-memory.dmp

Filesize
10.8MB

Download
memory/2876-14-0x00007FFC080E0000-0x00007FFC08BA2000-memory.dmp

Filesize
10.8MB

Download
memory/2876-17-0x00007FFC080E0000-0x00007FFC08BA2000-memory.dmp

Filesize
10.8MB

Download
memory/2876-3-0x00007FFC080E0000-0x00007FFC08BA2000-memory.dmp

Filesize
10.8MB

Download
memory/3076-33-0x0000027A0DB50000-0x0000027A0DB6E000-memory.dmp

Filesize
120KB

Download
memory/3076-31-0x0000027A26510000-0x0000027A26586000-memory.dmp

Filesize
472KB

Download
memory/3076-32-0x0000027A0DB70000-0x0000027A0DBC0000-memory.dmp

Filesize
320KB

Download
memory/3076-1-0x0000027A0BD20000-0x0000027A0BD60000-memory.dmp

Filesize
256KB

Download
memory/3076-0-0x00007FFC080E3000-0x00007FFC080E5000-memory.dmp

Filesize
8KB

Download
memory/3076-68-0x0000027A0DBC0000-0x0000027A0DBCA000-memory.dmp

Filesize
40KB

Download
memory/3076-69-0x0000027A265B0000-0x0000027A265C2000-memory.dmp

Filesize
72KB

Download
memory/3076-2-0x00007FFC080E0000-0x00007FFC08BA2000-memory.dmp

Filesize
10.8MB

Download
memory/3076-88-0x00007FFC080E0000-0x00007FFC08BA2000-memory.dmp

Filesize
10.8MB

Download