umbral | ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

Analysis

max time kernel
22s
max time network
25s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
16-11-2024 03:18

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General

Target

b5uEJHZB6Rl.exe
Size

231KB
MD5

438289fb9c72ed39bf5497f9af21ec7a
SHA1

8120391ecb41ed6a4c6ef0b259776e59311d6997
SHA256

ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85
SHA512

3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0
SSDEEP

6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3004-1-0x0000000000A40000-0x0000000000A80000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

2984 powershell.exe
2768 powershell.exe
1300 powershell.exe
1788 powershell.exe
Drops file in Drivers directory 1 IoCs

Processes:

b5uEJHZB6Rl.exe

description ioc process

File opened for modification C:\Windows\System32\drivers\etc\hosts b5uEJHZB6Rl.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1536 cmd.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
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

9 discord.com
10 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.

Processes:

flow ioc

6 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

Processes:

cmd.exePING.EXE

pid process

1536 cmd.exe
900 PING.EXE
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.

System Information Discovery
T1082

Processes:

wmic.exe

pid process

2644 wmic.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

900 PING.EXE
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

b5uEJHZB6Rl.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exe

pid process

3004 b5uEJHZB6Rl.exe
2984 powershell.exe
2768 powershell.exe
1300 powershell.exe
2828 powershell.exe
1788 powershell.exe

pid	process
2984	powershell.exe
2768	powershell.exe
1300	powershell.exe
1788	powershell.exe

description	ioc	process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b5uEJHZB6Rl.exe

pid	process
1536	cmd.exe

flow	ioc
9	discord.com
10	discord.com

flow	ioc
6	ip-api.com

pid	process
1536	cmd.exe
900	PING.EXE

pid	process
2644	wmic.exe

pid	process
900	PING.EXE

pid	process
3004	b5uEJHZB6Rl.exe
2984	powershell.exe
2768	powershell.exe
1300	powershell.exe
2828	powershell.exe
1788	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

b5uEJHZB6Rl.exewmic.exepowershell.exepowershell.exepowershell.exepowershell.exewmic.exe

description	pid	process
Token: SeDebugPrivilege	3004	b5uEJHZB6Rl.exe
Token: SeIncreaseQuotaPrivilege	2960	wmic.exe
Token: SeSecurityPrivilege	2960	wmic.exe
Token: SeTakeOwnershipPrivilege	2960	wmic.exe
Token: SeLoadDriverPrivilege	2960	wmic.exe
Token: SeSystemProfilePrivilege	2960	wmic.exe
Token: SeSystemtimePrivilege	2960	wmic.exe
Token: SeProfSingleProcessPrivilege	2960	wmic.exe
Token: SeIncBasePriorityPrivilege	2960	wmic.exe
Token: SeCreatePagefilePrivilege	2960	wmic.exe
Token: SeBackupPrivilege	2960	wmic.exe
Token: SeRestorePrivilege	2960	wmic.exe
Token: SeShutdownPrivilege	2960	wmic.exe
Token: SeDebugPrivilege	2960	wmic.exe
Token: SeSystemEnvironmentPrivilege	2960	wmic.exe
Token: SeRemoteShutdownPrivilege	2960	wmic.exe
Token: SeUndockPrivilege	2960	wmic.exe
Token: SeManageVolumePrivilege	2960	wmic.exe
Token: 33	2960	wmic.exe
Token: 34	2960	wmic.exe
Token: 35	2960	wmic.exe
Token: SeIncreaseQuotaPrivilege	2960	wmic.exe
Token: SeSecurityPrivilege	2960	wmic.exe
Token: SeTakeOwnershipPrivilege	2960	wmic.exe
Token: SeLoadDriverPrivilege	2960	wmic.exe
Token: SeSystemProfilePrivilege	2960	wmic.exe
Token: SeSystemtimePrivilege	2960	wmic.exe
Token: SeProfSingleProcessPrivilege	2960	wmic.exe
Token: SeIncBasePriorityPrivilege	2960	wmic.exe
Token: SeCreatePagefilePrivilege	2960	wmic.exe
Token: SeBackupPrivilege	2960	wmic.exe
Token: SeRestorePrivilege	2960	wmic.exe
Token: SeShutdownPrivilege	2960	wmic.exe
Token: SeDebugPrivilege	2960	wmic.exe
Token: SeSystemEnvironmentPrivilege	2960	wmic.exe
Token: SeRemoteShutdownPrivilege	2960	wmic.exe
Token: SeUndockPrivilege	2960	wmic.exe
Token: SeManageVolumePrivilege	2960	wmic.exe
Token: 33	2960	wmic.exe
Token: 34	2960	wmic.exe
Token: 35	2960	wmic.exe
Token: SeDebugPrivilege	2984	powershell.exe
Token: SeDebugPrivilege	2768	powershell.exe
Token: SeDebugPrivilege	1300	powershell.exe
Token: SeDebugPrivilege	2828	powershell.exe
Token: SeIncreaseQuotaPrivilege	2308	wmic.exe
Token: SeSecurityPrivilege	2308	wmic.exe
Token: SeTakeOwnershipPrivilege	2308	wmic.exe
Token: SeLoadDriverPrivilege	2308	wmic.exe
Token: SeSystemProfilePrivilege	2308	wmic.exe
Token: SeSystemtimePrivilege	2308	wmic.exe
Token: SeProfSingleProcessPrivilege	2308	wmic.exe
Token: SeIncBasePriorityPrivilege	2308	wmic.exe
Token: SeCreatePagefilePrivilege	2308	wmic.exe
Token: SeBackupPrivilege	2308	wmic.exe
Token: SeRestorePrivilege	2308	wmic.exe
Token: SeShutdownPrivilege	2308	wmic.exe
Token: SeDebugPrivilege	2308	wmic.exe
Token: SeSystemEnvironmentPrivilege	2308	wmic.exe
Token: SeRemoteShutdownPrivilege	2308	wmic.exe
Token: SeUndockPrivilege	2308	wmic.exe
Token: SeManageVolumePrivilege	2308	wmic.exe
Token: 33	2308	wmic.exe
Token: 34	2308	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

b5uEJHZB6Rl.execmd.exe

description	pid	process	target process
PID 3004 wrote to memory of 2960	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2960	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2960	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2508	3004	b5uEJHZB6Rl.exe	attrib.exe
PID 3004 wrote to memory of 2508	3004	b5uEJHZB6Rl.exe	attrib.exe
PID 3004 wrote to memory of 2508	3004	b5uEJHZB6Rl.exe	attrib.exe
PID 3004 wrote to memory of 2984	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2984	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2984	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2768	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2768	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2768	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 1300	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 1300	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 1300	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2828	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2828	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2828	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2308	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2308	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2308	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2400	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2400	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2400	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 632	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 632	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 632	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 1788	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 1788	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 1788	3004	b5uEJHZB6Rl.exe	powershell.exe
PID 3004 wrote to memory of 2644	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2644	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 2644	3004	b5uEJHZB6Rl.exe	wmic.exe
PID 3004 wrote to memory of 1536	3004	b5uEJHZB6Rl.exe	cmd.exe
PID 3004 wrote to memory of 1536	3004	b5uEJHZB6Rl.exe	cmd.exe
PID 3004 wrote to memory of 1536	3004	b5uEJHZB6Rl.exe	cmd.exe
PID 1536 wrote to memory of 900	1536	cmd.exe	PING.EXE
PID 1536 wrote to memory of 900	1536	cmd.exe	PING.EXE
PID 1536 wrote to memory of 900	1536	cmd.exe	PING.EXE

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2508 attrib.exe

pid	process
2508	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe
"C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2960
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
  2⤵
  - Views/modifies file attributes
  PID:2508
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2984
- 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:2768
- 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:1300
- 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:2828
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2308
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2400
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:632
- 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:1788
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2644
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1536
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:900

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

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

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

Filesize
7KB

MD5
f8f8a139a20fa652906437032fcb21f9

SHA1
121ee2d186d4462306539661cd9de008a095b717

SHA256
a67571bdca17e8cd7547978be01114b281833b86c5b80c759e5a83f0a5ff3cf5

SHA512
aa7d0c8d6a66df39524e906cda85ba1c817dd50fce53433090f3681a5997b367be40d41a1ccdf0c63572a054dbcfe7501251ff9e963fb41dead37bd17048cc3c

Download Submit
memory/1788-47-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download
memory/1788-46-0x000000001B200000-0x000000001B4E2000-memory.dmp

Filesize
2.9MB

Download
memory/2768-15-0x0000000002490000-0x0000000002498000-memory.dmp

Filesize
32KB

Download
memory/2768-14-0x000000001B1F0000-0x000000001B4D2000-memory.dmp

Filesize
2.9MB

Download
memory/2984-7-0x000000001B1C0000-0x000000001B4A2000-memory.dmp

Filesize
2.9MB

Download
memory/2984-8-0x00000000025A0000-0x00000000025A8000-memory.dmp

Filesize
32KB

Download
memory/3004-0-0x000007FEF66E3000-0x000007FEF66E4000-memory.dmp

Filesize
4KB

Download
memory/3004-29-0x000007FEF66E3000-0x000007FEF66E4000-memory.dmp

Filesize
4KB

Download
memory/3004-35-0x000007FEF66E0000-0x000007FEF70CC000-memory.dmp

Filesize
9.9MB

Download
memory/3004-2-0x000007FEF66E0000-0x000007FEF70CC000-memory.dmp

Filesize
9.9MB

Download
memory/3004-1-0x0000000000A40000-0x0000000000A80000-memory.dmp

Filesize
256KB

Download
memory/3004-52-0x000007FEF66E0000-0x000007FEF70CC000-memory.dmp

Filesize
9.9MB

Download