umbral | 1dc70027f52c53ee62f42585d875c8ee665c62c1a3688090c4031bd443549dc3

Resubmissions

01-12-2024 09:08

241201-k34dyayqat 10

01-12-2024 08:43

241201-kmxapaypcz 10

Analysis

max time kernel
97s
max time network
140s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
01-12-2024 08:43

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General

Target

gorebox.exe
Size

433KB
MD5

cc25bf7377c0ac9204180e9f7291456a
SHA1

2564bdbe4d34317222e0f6d8319868f2d9310c1c
SHA256

1dc70027f52c53ee62f42585d875c8ee665c62c1a3688090c4031bd443549dc3
SHA512

a785074fc29f63b785aad523c8889c2c3f20f52599e6b5715f12c3aaf873fcbeb53f68b5d32a29494d90999fc9f3b3dc6e7c728f0440434aa827c7171df78195
SSDEEP

6144:YahOrp0yN90QEoh+Kg4+CAQepPq06NaqQxFAyPjbBW8mpqf+JvQxPRt:Yi7y90C+T4+CAnpPqoqQx59W89+J8b

Score

10^/10

umbral execution persistence spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1312553527435984916/bA-hbry9izKY0icMXgK9Nr6rEcNwmzCA1_QKEDcV4uegdqzcVCTUfnkyX2nsI1C3Coao

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x00280000000450cd-8.dat	family_umbral
behavioral1/memory/3760-10-0x00000170914D0000-0x000001709151A000-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
3812	powershell.exe
4580	powershell.exe
3744	powershell.exe
3636	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	goreboxr.exe

Executes dropped EXE 2 IoCs

pid	Process
4012	GoreBox.exe
3760	goreboxr.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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	gorebox.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
20	discord.com
21	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
8	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2112	wmic.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
444	wmic.exe
444	wmic.exe
444	wmic.exe
444	wmic.exe
3760	goreboxr.exe
3812	powershell.exe
3812	powershell.exe
3744	powershell.exe
3744	powershell.exe
3636	powershell.exe
3636	powershell.exe
3916	powershell.exe
3916	powershell.exe
1748	wmic.exe
1748	wmic.exe
1748	wmic.exe
1748	wmic.exe
3248	wmic.exe
3248	wmic.exe
3248	wmic.exe
3248	wmic.exe
3676	wmic.exe
3676	wmic.exe
3676	wmic.exe
3676	wmic.exe
4580	powershell.exe
4580	powershell.exe
2112	wmic.exe
2112	wmic.exe
2112	wmic.exe
2112	wmic.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3760	goreboxr.exe
Token: SeIncreaseQuotaPrivilege	444	wmic.exe
Token: SeSecurityPrivilege	444	wmic.exe
Token: SeTakeOwnershipPrivilege	444	wmic.exe
Token: SeLoadDriverPrivilege	444	wmic.exe
Token: SeSystemProfilePrivilege	444	wmic.exe
Token: SeSystemtimePrivilege	444	wmic.exe
Token: SeProfSingleProcessPrivilege	444	wmic.exe
Token: SeIncBasePriorityPrivilege	444	wmic.exe
Token: SeCreatePagefilePrivilege	444	wmic.exe
Token: SeBackupPrivilege	444	wmic.exe
Token: SeRestorePrivilege	444	wmic.exe
Token: SeShutdownPrivilege	444	wmic.exe
Token: SeDebugPrivilege	444	wmic.exe
Token: SeSystemEnvironmentPrivilege	444	wmic.exe
Token: SeRemoteShutdownPrivilege	444	wmic.exe
Token: SeUndockPrivilege	444	wmic.exe
Token: SeManageVolumePrivilege	444	wmic.exe
Token: 33	444	wmic.exe
Token: 34	444	wmic.exe
Token: 35	444	wmic.exe
Token: 36	444	wmic.exe
Token: SeIncreaseQuotaPrivilege	444	wmic.exe
Token: SeSecurityPrivilege	444	wmic.exe
Token: SeTakeOwnershipPrivilege	444	wmic.exe
Token: SeLoadDriverPrivilege	444	wmic.exe
Token: SeSystemProfilePrivilege	444	wmic.exe
Token: SeSystemtimePrivilege	444	wmic.exe
Token: SeProfSingleProcessPrivilege	444	wmic.exe
Token: SeIncBasePriorityPrivilege	444	wmic.exe
Token: SeCreatePagefilePrivilege	444	wmic.exe
Token: SeBackupPrivilege	444	wmic.exe
Token: SeRestorePrivilege	444	wmic.exe
Token: SeShutdownPrivilege	444	wmic.exe
Token: SeDebugPrivilege	444	wmic.exe
Token: SeSystemEnvironmentPrivilege	444	wmic.exe
Token: SeRemoteShutdownPrivilege	444	wmic.exe
Token: SeUndockPrivilege	444	wmic.exe
Token: SeManageVolumePrivilege	444	wmic.exe
Token: 33	444	wmic.exe
Token: 34	444	wmic.exe
Token: 35	444	wmic.exe
Token: 36	444	wmic.exe
Token: SeDebugPrivilege	3812	powershell.exe
Token: SeIncreaseQuotaPrivilege	3812	powershell.exe
Token: SeSecurityPrivilege	3812	powershell.exe
Token: SeTakeOwnershipPrivilege	3812	powershell.exe
Token: SeLoadDriverPrivilege	3812	powershell.exe
Token: SeSystemProfilePrivilege	3812	powershell.exe
Token: SeSystemtimePrivilege	3812	powershell.exe
Token: SeProfSingleProcessPrivilege	3812	powershell.exe
Token: SeIncBasePriorityPrivilege	3812	powershell.exe
Token: SeCreatePagefilePrivilege	3812	powershell.exe
Token: SeBackupPrivilege	3812	powershell.exe
Token: SeRestorePrivilege	3812	powershell.exe
Token: SeShutdownPrivilege	3812	powershell.exe
Token: SeDebugPrivilege	3812	powershell.exe
Token: SeSystemEnvironmentPrivilege	3812	powershell.exe
Token: SeRemoteShutdownPrivilege	3812	powershell.exe
Token: SeUndockPrivilege	3812	powershell.exe
Token: SeManageVolumePrivilege	3812	powershell.exe
Token: 33	3812	powershell.exe
Token: 34	3812	powershell.exe
Token: 35	3812	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 4012	2084	gorebox.exe	81
PID 2084 wrote to memory of 4012	2084	gorebox.exe	81
PID 2084 wrote to memory of 3760	2084	gorebox.exe	82
PID 2084 wrote to memory of 3760	2084	gorebox.exe	82
PID 3760 wrote to memory of 444	3760	goreboxr.exe	83
PID 3760 wrote to memory of 444	3760	goreboxr.exe	83
PID 3760 wrote to memory of 3812	3760	goreboxr.exe	86
PID 3760 wrote to memory of 3812	3760	goreboxr.exe	86
PID 3760 wrote to memory of 3744	3760	goreboxr.exe	89
PID 3760 wrote to memory of 3744	3760	goreboxr.exe	89
PID 3760 wrote to memory of 3636	3760	goreboxr.exe	91
PID 3760 wrote to memory of 3636	3760	goreboxr.exe	91
PID 3760 wrote to memory of 3916	3760	goreboxr.exe	95
PID 3760 wrote to memory of 3916	3760	goreboxr.exe	95
PID 3760 wrote to memory of 1748	3760	goreboxr.exe	98
PID 3760 wrote to memory of 1748	3760	goreboxr.exe	98
PID 3760 wrote to memory of 3248	3760	goreboxr.exe	100
PID 3760 wrote to memory of 3248	3760	goreboxr.exe	100
PID 3760 wrote to memory of 3676	3760	goreboxr.exe	102
PID 3760 wrote to memory of 3676	3760	goreboxr.exe	102
PID 3760 wrote to memory of 4580	3760	goreboxr.exe	104
PID 3760 wrote to memory of 4580	3760	goreboxr.exe	104
PID 3760 wrote to memory of 2112	3760	goreboxr.exe	106
PID 3760 wrote to memory of 2112	3760	goreboxr.exe	106

C:\Users\Admin\AppData\Local\Temp\gorebox.exe
"C:\Users\Admin\AppData\Local\Temp\gorebox.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\GoreBox.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\GoreBox.exe
  2⤵
  - Executes dropped EXE
  PID:4012
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\goreboxr.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\goreboxr.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3760
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:444
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\goreboxr.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3812
- - 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
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:3744
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:3636
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3916
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1748
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3248
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3676
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:4580
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious behavior: EnumeratesProcesses
    PID:2112

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

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
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
60ba7ac90c0e466144b48a90919960b6

SHA1
fe7f5d9e1d317f9409d8daa35d9c890f7e222d6a

SHA256
43d3c3113c66141b3a1f1f1bbf2d32a80128d029903ca58db09e9c6a9410ef9e

SHA512
92a1d912fd7be06820ec97b192b965d04ff44ff6a1c76b55405ecf20ca995762d823f52f174d8f48feb1d454716ab244adb4945febbf4fe4a6f91dd9791f87f2

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

Filesize
948B

MD5
1297ab1638f5754968fea0e770ae6b77

SHA1
31d494d49591b10227e9e20441102f15e089c0eb

SHA256
9ccaa5d197966ed0d707103be05ab3e5b48f9992545d743d5bc8fa2a00d905f8

SHA512
105ad4ced4851c6b78e5a8038b1c5584ecea0eb32087994f7fefde86207961739b5d6ed64f64d9e5298b1c149069c6cb3b7658e56bb329ed79f5ff6a25c18f3f

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

Filesize
1KB

MD5
cce846d4d061ab3c9c60e2e4723afc37

SHA1
dbfb35606ef1ba6a8fe0761baf0a5a8d61ddc3d0

SHA256
05493954effa576bee288b5da8a22c2b8cf6b3f1f7a7f49d430ff7c959e78385

SHA512
c21366673b03e1fd661acba46d00200f83df5a40668f1c39abcf6e0d92370a8fc40758e487566fd7066b185f0658d9f149f293dce01235b60fbac8c40f4d7172

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

Filesize
1KB

MD5
3fe8acacbcea9723436f6a8a96ca56a6

SHA1
69bfb0cfb7debbc189283ce7728132bace1fb8d9

SHA256
71303800d8cc8b399bf9332dde36ba3f123adc6d9b8e30252a7225829e8777f3

SHA512
b14ff78ffd5b61c6e97fc368429f3c6678d1a72a7e8a4ceba2cf75b5b8111bebf0429f7616d88ebadc3fef43cd6ce52c6ce1a296dc4e9f3f174dcd2bc372c9ef

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\GoreBox.exe

Filesize
651KB

MD5
5b23e32cdf5236587cf71ce4b5f001a6

SHA1
f9ab18bb610b5e999320e422f4fffd05ed08209a

SHA256
11cfef86247a1725b6ac0ad49bb40217d6758c2fae04041f7aa1b73c68795d72

SHA512
82859dc2637ec91af549cb402afafc1a2f09c73b7046eecaf81b366abd7b003f74f12b50b198ed79e49beb56f1117e2b9164d05bd9a650858db80075d39fee42

Download Submit
C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\goreboxr.exe

Filesize
275KB

MD5
97a8417cd8fa79bce383a00a55568274

SHA1
a2b3789316bf0cce8826f7377a6ccfea8b4aa08d

SHA256
7c3217c00a01cbb6cfd0243869490f4d7c48cc41626a472d88b406f196978810

SHA512
417741e48d0cc5c5913fcce861662c927bf43d4d568144ab719bd19eca9f8ced0fdffd77fcd7c899ff3474f570274c1faab85b47a1d269230b18c5f7ad7a81a4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_na4vujy4.jw3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3744-36-0x0000020FBA8B0000-0x0000020FBAACD000-memory.dmp

Filesize
2.1MB

Download
memory/3760-66-0x00000170ABED0000-0x00000170ABEE2000-memory.dmp

Filesize
72KB

Download
memory/3760-38-0x0000017093210000-0x0000017093286000-memory.dmp

Filesize
472KB

Download
memory/3760-39-0x0000017093170000-0x00000170931C0000-memory.dmp

Filesize
320KB

Download
memory/3760-40-0x0000017093150000-0x000001709316E000-memory.dmp

Filesize
120KB

Download
memory/3760-11-0x00007FFCB9580000-0x00007FFCBA042000-memory.dmp

Filesize
10.8MB

Download
memory/3760-10-0x00000170914D0000-0x000001709151A000-memory.dmp

Filesize
296KB

Download
memory/3760-65-0x00000170932A0000-0x00000170932AA000-memory.dmp

Filesize
40KB

Download
memory/3760-9-0x00007FFCB9583000-0x00007FFCB9585000-memory.dmp

Filesize
8KB

Download
memory/3760-86-0x00000170ABCE0000-0x00000170ABE87000-memory.dmp

Filesize
1.7MB

Download
memory/3760-87-0x00007FFCB9580000-0x00007FFCBA042000-memory.dmp

Filesize
10.8MB

Download
memory/3812-21-0x0000023A73390000-0x0000023A733B2000-memory.dmp

Filesize
136KB

Download