umbral | 0d40285ecea52026970582f409dc872e807b08bff8dae8d80586abb970561390

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
04-08-2024 11:54

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General

Target

crackgroup.exe
Size

231KB
MD5

2d1b35b5d718c37ac6cf1daf74668c5c
SHA1

3db5006dbbb6cb3eb4a999823aebe3cd34e883f7
SHA256

0d40285ecea52026970582f409dc872e807b08bff8dae8d80586abb970561390
SHA512

118b13219915396427a2c25e1516cbe441ddad08cca0038ddb2a35967bb1ff2017fd6de554a95db68caf91119bee4076df61461ed35ceef8f8b0f07b5c930752
SSDEEP

6144:RloZMNrIkd8g+EtXHkv/iD48O94vFuW568VHCCHkqb8e1m8Mdi:joZmL+EP88O94vFuW568VHCCHrPM0

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2352-1-0x0000000000DF0000-0x0000000000E30000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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
2788	powershell.exe
2604	powershell.exe
2624	powershell.exe
2088	powershell.exe

Reads user/profile data of web browsers 2 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

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

Web Service

T1102

flow	ioc
6	discord.com
7	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1960	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2788	powershell.exe
2604	powershell.exe
2624	powershell.exe
2284	powershell.exe
2088	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2352	crackgroup.exe
Token: SeDebugPrivilege	2788	powershell.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2284	powershell.exe
Token: SeIncreaseQuotaPrivilege	2968	wmic.exe
Token: SeSecurityPrivilege	2968	wmic.exe
Token: SeTakeOwnershipPrivilege	2968	wmic.exe
Token: SeLoadDriverPrivilege	2968	wmic.exe
Token: SeSystemProfilePrivilege	2968	wmic.exe
Token: SeSystemtimePrivilege	2968	wmic.exe
Token: SeProfSingleProcessPrivilege	2968	wmic.exe
Token: SeIncBasePriorityPrivilege	2968	wmic.exe
Token: SeCreatePagefilePrivilege	2968	wmic.exe
Token: SeBackupPrivilege	2968	wmic.exe
Token: SeRestorePrivilege	2968	wmic.exe
Token: SeShutdownPrivilege	2968	wmic.exe
Token: SeDebugPrivilege	2968	wmic.exe
Token: SeSystemEnvironmentPrivilege	2968	wmic.exe
Token: SeRemoteShutdownPrivilege	2968	wmic.exe
Token: SeUndockPrivilege	2968	wmic.exe
Token: SeManageVolumePrivilege	2968	wmic.exe
Token: 33	2968	wmic.exe
Token: 34	2968	wmic.exe
Token: 35	2968	wmic.exe
Token: SeIncreaseQuotaPrivilege	2968	wmic.exe
Token: SeSecurityPrivilege	2968	wmic.exe
Token: SeTakeOwnershipPrivilege	2968	wmic.exe
Token: SeLoadDriverPrivilege	2968	wmic.exe
Token: SeSystemProfilePrivilege	2968	wmic.exe
Token: SeSystemtimePrivilege	2968	wmic.exe
Token: SeProfSingleProcessPrivilege	2968	wmic.exe
Token: SeIncBasePriorityPrivilege	2968	wmic.exe
Token: SeCreatePagefilePrivilege	2968	wmic.exe
Token: SeBackupPrivilege	2968	wmic.exe
Token: SeRestorePrivilege	2968	wmic.exe
Token: SeShutdownPrivilege	2968	wmic.exe
Token: SeDebugPrivilege	2968	wmic.exe
Token: SeSystemEnvironmentPrivilege	2968	wmic.exe
Token: SeRemoteShutdownPrivilege	2968	wmic.exe
Token: SeUndockPrivilege	2968	wmic.exe
Token: SeManageVolumePrivilege	2968	wmic.exe
Token: 33	2968	wmic.exe
Token: 34	2968	wmic.exe
Token: 35	2968	wmic.exe
Token: SeIncreaseQuotaPrivilege	2856	wmic.exe
Token: SeSecurityPrivilege	2856	wmic.exe
Token: SeTakeOwnershipPrivilege	2856	wmic.exe
Token: SeLoadDriverPrivilege	2856	wmic.exe
Token: SeSystemProfilePrivilege	2856	wmic.exe
Token: SeSystemtimePrivilege	2856	wmic.exe
Token: SeProfSingleProcessPrivilege	2856	wmic.exe
Token: SeIncBasePriorityPrivilege	2856	wmic.exe
Token: SeCreatePagefilePrivilege	2856	wmic.exe
Token: SeBackupPrivilege	2856	wmic.exe
Token: SeRestorePrivilege	2856	wmic.exe
Token: SeShutdownPrivilege	2856	wmic.exe
Token: SeDebugPrivilege	2856	wmic.exe
Token: SeSystemEnvironmentPrivilege	2856	wmic.exe
Token: SeRemoteShutdownPrivilege	2856	wmic.exe
Token: SeUndockPrivilege	2856	wmic.exe
Token: SeManageVolumePrivilege	2856	wmic.exe
Token: 33	2856	wmic.exe
Token: 34	2856	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2352 wrote to memory of 2788	2352	crackgroup.exe	30
PID 2352 wrote to memory of 2788	2352	crackgroup.exe	30
PID 2352 wrote to memory of 2788	2352	crackgroup.exe	30
PID 2352 wrote to memory of 2604	2352	crackgroup.exe	32
PID 2352 wrote to memory of 2604	2352	crackgroup.exe	32
PID 2352 wrote to memory of 2604	2352	crackgroup.exe	32
PID 2352 wrote to memory of 2624	2352	crackgroup.exe	34
PID 2352 wrote to memory of 2624	2352	crackgroup.exe	34
PID 2352 wrote to memory of 2624	2352	crackgroup.exe	34
PID 2352 wrote to memory of 2284	2352	crackgroup.exe	36
PID 2352 wrote to memory of 2284	2352	crackgroup.exe	36
PID 2352 wrote to memory of 2284	2352	crackgroup.exe	36
PID 2352 wrote to memory of 2968	2352	crackgroup.exe	38
PID 2352 wrote to memory of 2968	2352	crackgroup.exe	38
PID 2352 wrote to memory of 2968	2352	crackgroup.exe	38
PID 2352 wrote to memory of 2856	2352	crackgroup.exe	41
PID 2352 wrote to memory of 2856	2352	crackgroup.exe	41
PID 2352 wrote to memory of 2856	2352	crackgroup.exe	41
PID 2352 wrote to memory of 3000	2352	crackgroup.exe	43
PID 2352 wrote to memory of 3000	2352	crackgroup.exe	43
PID 2352 wrote to memory of 3000	2352	crackgroup.exe	43
PID 2352 wrote to memory of 2088	2352	crackgroup.exe	45
PID 2352 wrote to memory of 2088	2352	crackgroup.exe	45
PID 2352 wrote to memory of 2088	2352	crackgroup.exe	45
PID 2352 wrote to memory of 1960	2352	crackgroup.exe	47
PID 2352 wrote to memory of 1960	2352	crackgroup.exe	47
PID 2352 wrote to memory of 1960	2352	crackgroup.exe	47

C:\Users\Admin\AppData\Local\Temp\crackgroup.exe
"C:\Users\Admin\AppData\Local\Temp\crackgroup.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2352
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\crackgroup.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2788
- 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:2604
- 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:2624
- 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:2284
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2856
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3000
- 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:2088
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1960

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

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
3e6cd3e39288c9d007977f77a2f24c09

SHA1
e609627e8a0bfc1a92aa144c22c5ff15ed4454d3

SHA256
92cebbe82f5e9f3982218ac79a645a49539bd3fe45beca44431286a7be7ea0b3

SHA512
a84df78a573728e74397dca6f0cbdb9bf535ba09ad82e8ed225ea46899b9d718894a4a0aefe9dda5070a74aad5de751720aea0165ed190041c2af10a3bb9134f

Download Submit
memory/2352-1-0x0000000000DF0000-0x0000000000E30000-memory.dmp

Filesize
256KB

Download
memory/2352-2-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

Filesize
9.9MB

Download
memory/2352-51-0x000007FEF5CF0000-0x000007FEF66DC000-memory.dmp

Filesize
9.9MB

Download
memory/2352-0-0x000007FEF5CF3000-0x000007FEF5CF4000-memory.dmp

Filesize
4KB

Download
memory/2604-21-0x000000001B740000-0x000000001BA22000-memory.dmp

Filesize
2.9MB

Download
memory/2604-22-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2788-8-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/2788-13-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

Filesize
9.6MB

Download
memory/2788-14-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

Filesize
9.6MB

Download
memory/2788-15-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

Filesize
9.6MB

Download
memory/2788-12-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

Filesize
9.6MB

Download
memory/2788-11-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

Filesize
9.6MB

Download
memory/2788-10-0x000007FEEDC50000-0x000007FEEE5ED000-memory.dmp

Filesize
9.6MB

Download
memory/2788-9-0x0000000001E00000-0x0000000001E08000-memory.dmp

Filesize
32KB

Download
memory/2788-7-0x000007FEEDF0E000-0x000007FEEDF0F000-memory.dmp

Filesize
4KB

Download