umbral | 7bef7c9f99847e7c368be124992565c4bcd089948d5b1ca1d1c46911c625a5b1

Resubmissions

01-12-2024 09:35

241201-lkjggsyqhy 10

01-12-2024 09:26

241201-ld8g2ayqdx 10

Analysis

max time kernel
432s
max time network
434s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-12-2024 09:35

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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/0x0009000000023c82-7.dat	family_umbral
behavioral1/memory/3456-9-0x00000149C78E0000-0x00000149C792A000-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
4052	powershell.exe
3184	powershell.exe
2384	powershell.exe
1304	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
2044	GoreBox.exe
3456	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
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
9	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
4340	cmd.exe
4876	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4364	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4876	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3456	gorerrrr.exe
4052	powershell.exe
4052	powershell.exe
3184	powershell.exe
3184	powershell.exe
2384	powershell.exe
2384	powershell.exe
3816	powershell.exe
3816	powershell.exe
1304	powershell.exe
1304	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3456	gorerrrr.exe
Token: SeIncreaseQuotaPrivilege	2576	wmic.exe
Token: SeSecurityPrivilege	2576	wmic.exe
Token: SeTakeOwnershipPrivilege	2576	wmic.exe
Token: SeLoadDriverPrivilege	2576	wmic.exe
Token: SeSystemProfilePrivilege	2576	wmic.exe
Token: SeSystemtimePrivilege	2576	wmic.exe
Token: SeProfSingleProcessPrivilege	2576	wmic.exe
Token: SeIncBasePriorityPrivilege	2576	wmic.exe
Token: SeCreatePagefilePrivilege	2576	wmic.exe
Token: SeBackupPrivilege	2576	wmic.exe
Token: SeRestorePrivilege	2576	wmic.exe
Token: SeShutdownPrivilege	2576	wmic.exe
Token: SeDebugPrivilege	2576	wmic.exe
Token: SeSystemEnvironmentPrivilege	2576	wmic.exe
Token: SeRemoteShutdownPrivilege	2576	wmic.exe
Token: SeUndockPrivilege	2576	wmic.exe
Token: SeManageVolumePrivilege	2576	wmic.exe
Token: 33	2576	wmic.exe
Token: 34	2576	wmic.exe
Token: 35	2576	wmic.exe
Token: 36	2576	wmic.exe
Token: SeIncreaseQuotaPrivilege	2576	wmic.exe
Token: SeSecurityPrivilege	2576	wmic.exe
Token: SeTakeOwnershipPrivilege	2576	wmic.exe
Token: SeLoadDriverPrivilege	2576	wmic.exe
Token: SeSystemProfilePrivilege	2576	wmic.exe
Token: SeSystemtimePrivilege	2576	wmic.exe
Token: SeProfSingleProcessPrivilege	2576	wmic.exe
Token: SeIncBasePriorityPrivilege	2576	wmic.exe
Token: SeCreatePagefilePrivilege	2576	wmic.exe
Token: SeBackupPrivilege	2576	wmic.exe
Token: SeRestorePrivilege	2576	wmic.exe
Token: SeShutdownPrivilege	2576	wmic.exe
Token: SeDebugPrivilege	2576	wmic.exe
Token: SeSystemEnvironmentPrivilege	2576	wmic.exe
Token: SeRemoteShutdownPrivilege	2576	wmic.exe
Token: SeUndockPrivilege	2576	wmic.exe
Token: SeManageVolumePrivilege	2576	wmic.exe
Token: 33	2576	wmic.exe
Token: 34	2576	wmic.exe
Token: 35	2576	wmic.exe
Token: 36	2576	wmic.exe
Token: SeDebugPrivilege	4052	powershell.exe
Token: SeDebugPrivilege	3184	powershell.exe
Token: SeDebugPrivilege	2384	powershell.exe
Token: SeDebugPrivilege	3816	powershell.exe
Token: SeIncreaseQuotaPrivilege	3964	wmic.exe
Token: SeSecurityPrivilege	3964	wmic.exe
Token: SeTakeOwnershipPrivilege	3964	wmic.exe
Token: SeLoadDriverPrivilege	3964	wmic.exe
Token: SeSystemProfilePrivilege	3964	wmic.exe
Token: SeSystemtimePrivilege	3964	wmic.exe
Token: SeProfSingleProcessPrivilege	3964	wmic.exe
Token: SeIncBasePriorityPrivilege	3964	wmic.exe
Token: SeCreatePagefilePrivilege	3964	wmic.exe
Token: SeBackupPrivilege	3964	wmic.exe
Token: SeRestorePrivilege	3964	wmic.exe
Token: SeShutdownPrivilege	3964	wmic.exe
Token: SeDebugPrivilege	3964	wmic.exe
Token: SeSystemEnvironmentPrivilege	3964	wmic.exe
Token: SeRemoteShutdownPrivilege	3964	wmic.exe
Token: SeUndockPrivilege	3964	wmic.exe
Token: SeManageVolumePrivilege	3964	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4412 wrote to memory of 2044	4412	gorebox.exe	83
PID 4412 wrote to memory of 2044	4412	gorebox.exe	83
PID 4412 wrote to memory of 3456	4412	gorebox.exe	84
PID 4412 wrote to memory of 3456	4412	gorebox.exe	84
PID 3456 wrote to memory of 2576	3456	gorerrrr.exe	85
PID 3456 wrote to memory of 2576	3456	gorerrrr.exe	85
PID 3456 wrote to memory of 4112	3456	gorerrrr.exe	88
PID 3456 wrote to memory of 4112	3456	gorerrrr.exe	88
PID 3456 wrote to memory of 4052	3456	gorerrrr.exe	90
PID 3456 wrote to memory of 4052	3456	gorerrrr.exe	90
PID 3456 wrote to memory of 3184	3456	gorerrrr.exe	92
PID 3456 wrote to memory of 3184	3456	gorerrrr.exe	92
PID 3456 wrote to memory of 2384	3456	gorerrrr.exe	94
PID 3456 wrote to memory of 2384	3456	gorerrrr.exe	94
PID 3456 wrote to memory of 3816	3456	gorerrrr.exe	96
PID 3456 wrote to memory of 3816	3456	gorerrrr.exe	96
PID 3456 wrote to memory of 3964	3456	gorerrrr.exe	99
PID 3456 wrote to memory of 3964	3456	gorerrrr.exe	99
PID 3456 wrote to memory of 2872	3456	gorerrrr.exe	101
PID 3456 wrote to memory of 2872	3456	gorerrrr.exe	101
PID 3456 wrote to memory of 4432	3456	gorerrrr.exe	103
PID 3456 wrote to memory of 4432	3456	gorerrrr.exe	103
PID 3456 wrote to memory of 1304	3456	gorerrrr.exe	105
PID 3456 wrote to memory of 1304	3456	gorerrrr.exe	105
PID 3456 wrote to memory of 4364	3456	gorerrrr.exe	107
PID 3456 wrote to memory of 4364	3456	gorerrrr.exe	107
PID 3456 wrote to memory of 4340	3456	gorerrrr.exe	109
PID 3456 wrote to memory of 4340	3456	gorerrrr.exe	109
PID 4340 wrote to memory of 4876	4340	cmd.exe	111
PID 4340 wrote to memory of 4876	4340	cmd.exe	111

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4112	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:4412
- 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:2044
- 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:3456
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2576
- - 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:4112
- - 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:4052
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:3184
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:2384
- - 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
    - Suspicious use of AdjustPrivilegeToken
    PID:3816
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3964
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2872
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:4432
- - 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:1304
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:4364
- - 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:4340
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4876

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
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
ec1ba4a995d866b282087b26a0539bbc

SHA1
c4aeae2bc3fa9a898680648b20102f01e8a811cf

SHA256
469da678c3c0364b1b511962cffd44cbfc10aab5c1c528c0c09fd952f08d8a2c

SHA512
07bf757ec9d0d368d3ef1bfc2b562895e2708757f8fefa04fa50beaa6fb38af1018ea0cfccf5666c5c8baa4c894deead9652c53e0608aa6a83ef5b396dba43e9

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_rst5vxwk.22j.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3456-38-0x00000149E2070000-0x00000149E20E6000-memory.dmp

Filesize
472KB

Download
memory/3456-9-0x00000149C78E0000-0x00000149C792A000-memory.dmp

Filesize
296KB

Download
memory/3456-39-0x00000149E1EE0000-0x00000149E1F30000-memory.dmp

Filesize
320KB

Download
memory/3456-40-0x00000149E1F30000-0x00000149E1F4E000-memory.dmp

Filesize
120KB

Download
memory/3456-10-0x00007FF9E2CE3000-0x00007FF9E2CE5000-memory.dmp

Filesize
8KB

Download
memory/3456-77-0x00000149E20F0000-0x00000149E20FA000-memory.dmp

Filesize
40KB

Download
memory/3456-78-0x00000149E2120000-0x00000149E2132000-memory.dmp

Filesize
72KB

Download
memory/3456-11-0x00007FF9E2CE0000-0x00007FF9E37A1000-memory.dmp

Filesize
10.8MB

Download
memory/3456-98-0x00007FF9E2CE0000-0x00007FF9E37A1000-memory.dmp

Filesize
10.8MB

Download
memory/4052-18-0x0000019BD3BF0000-0x0000019BD3C12000-memory.dmp

Filesize
136KB

Download