umbral | 9ff459396b1f4de8dbca8a866ff3b9e4a46c48a9dc1071812a256fe21349caf9

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
29-11-2024 13:37

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General

Target

BESTDISCORDIPPULLERMAMBAPULLER.exe
Size

230KB
MD5

b23d20593d9176d95302568243f60052
SHA1

fef1aa01b7a41a8255d71309c7c5badf48a7a907
SHA256

9ff459396b1f4de8dbca8a866ff3b9e4a46c48a9dc1071812a256fe21349caf9
SHA512

13a9f86ca7b7df87b4174875fb3d7a7552986a6484297c841037b054d3bf01eab724f3b080f9f1984cc58912e0a50953f5d1e2355dca1cc5366eca4870400d3e
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4M8RobhS6FDAxDeebSzb8e1muQTSi:noZtL+EP8M8RobhS6FDAxDeebIHQz

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2880-1-0x0000000000250000-0x0000000000290000-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
2640	powershell.exe
2680	powershell.exe
2508	powershell.exe
2516	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
760	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

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.

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

pid	Process
760	cmd.exe
2352	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2076	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2352	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2880	BESTDISCORDIPPULLERMAMBAPULLER.exe
2640	powershell.exe
2680	powershell.exe
2508	powershell.exe
2936	powershell.exe
2516	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe
Token: SeIncreaseQuotaPrivilege	2204	wmic.exe
Token: SeSecurityPrivilege	2204	wmic.exe
Token: SeTakeOwnershipPrivilege	2204	wmic.exe
Token: SeLoadDriverPrivilege	2204	wmic.exe
Token: SeSystemProfilePrivilege	2204	wmic.exe
Token: SeSystemtimePrivilege	2204	wmic.exe
Token: SeProfSingleProcessPrivilege	2204	wmic.exe
Token: SeIncBasePriorityPrivilege	2204	wmic.exe
Token: SeCreatePagefilePrivilege	2204	wmic.exe
Token: SeBackupPrivilege	2204	wmic.exe
Token: SeRestorePrivilege	2204	wmic.exe
Token: SeShutdownPrivilege	2204	wmic.exe
Token: SeDebugPrivilege	2204	wmic.exe
Token: SeSystemEnvironmentPrivilege	2204	wmic.exe
Token: SeRemoteShutdownPrivilege	2204	wmic.exe
Token: SeUndockPrivilege	2204	wmic.exe
Token: SeManageVolumePrivilege	2204	wmic.exe
Token: 33	2204	wmic.exe
Token: 34	2204	wmic.exe
Token: 35	2204	wmic.exe
Token: SeIncreaseQuotaPrivilege	2204	wmic.exe
Token: SeSecurityPrivilege	2204	wmic.exe
Token: SeTakeOwnershipPrivilege	2204	wmic.exe
Token: SeLoadDriverPrivilege	2204	wmic.exe
Token: SeSystemProfilePrivilege	2204	wmic.exe
Token: SeSystemtimePrivilege	2204	wmic.exe
Token: SeProfSingleProcessPrivilege	2204	wmic.exe
Token: SeIncBasePriorityPrivilege	2204	wmic.exe
Token: SeCreatePagefilePrivilege	2204	wmic.exe
Token: SeBackupPrivilege	2204	wmic.exe
Token: SeRestorePrivilege	2204	wmic.exe
Token: SeShutdownPrivilege	2204	wmic.exe
Token: SeDebugPrivilege	2204	wmic.exe
Token: SeSystemEnvironmentPrivilege	2204	wmic.exe
Token: SeRemoteShutdownPrivilege	2204	wmic.exe
Token: SeUndockPrivilege	2204	wmic.exe
Token: SeManageVolumePrivilege	2204	wmic.exe
Token: 33	2204	wmic.exe
Token: 34	2204	wmic.exe
Token: 35	2204	wmic.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	2680	powershell.exe
Token: SeDebugPrivilege	2508	powershell.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeIncreaseQuotaPrivilege	1140	wmic.exe
Token: SeSecurityPrivilege	1140	wmic.exe
Token: SeTakeOwnershipPrivilege	1140	wmic.exe
Token: SeLoadDriverPrivilege	1140	wmic.exe
Token: SeSystemProfilePrivilege	1140	wmic.exe
Token: SeSystemtimePrivilege	1140	wmic.exe
Token: SeProfSingleProcessPrivilege	1140	wmic.exe
Token: SeIncBasePriorityPrivilege	1140	wmic.exe
Token: SeCreatePagefilePrivilege	1140	wmic.exe
Token: SeBackupPrivilege	1140	wmic.exe
Token: SeRestorePrivilege	1140	wmic.exe
Token: SeShutdownPrivilege	1140	wmic.exe
Token: SeDebugPrivilege	1140	wmic.exe
Token: SeSystemEnvironmentPrivilege	1140	wmic.exe
Token: SeRemoteShutdownPrivilege	1140	wmic.exe
Token: SeUndockPrivilege	1140	wmic.exe
Token: SeManageVolumePrivilege	1140	wmic.exe
Token: 33	1140	wmic.exe
Token: 34	1140	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2880 wrote to memory of 2204	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	30
PID 2880 wrote to memory of 2204	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	30
PID 2880 wrote to memory of 2204	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	30
PID 2880 wrote to memory of 2748	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	33
PID 2880 wrote to memory of 2748	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	33
PID 2880 wrote to memory of 2748	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	33
PID 2880 wrote to memory of 2640	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	35
PID 2880 wrote to memory of 2640	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	35
PID 2880 wrote to memory of 2640	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	35
PID 2880 wrote to memory of 2680	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	37
PID 2880 wrote to memory of 2680	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	37
PID 2880 wrote to memory of 2680	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	37
PID 2880 wrote to memory of 2508	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	39
PID 2880 wrote to memory of 2508	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	39
PID 2880 wrote to memory of 2508	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	39
PID 2880 wrote to memory of 2936	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	41
PID 2880 wrote to memory of 2936	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	41
PID 2880 wrote to memory of 2936	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	41
PID 2880 wrote to memory of 1140	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	43
PID 2880 wrote to memory of 1140	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	43
PID 2880 wrote to memory of 1140	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	43
PID 2880 wrote to memory of 1632	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	45
PID 2880 wrote to memory of 1632	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	45
PID 2880 wrote to memory of 1632	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	45
PID 2880 wrote to memory of 472	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	47
PID 2880 wrote to memory of 472	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	47
PID 2880 wrote to memory of 472	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	47
PID 2880 wrote to memory of 2516	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	49
PID 2880 wrote to memory of 2516	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	49
PID 2880 wrote to memory of 2516	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	49
PID 2880 wrote to memory of 2076	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	51
PID 2880 wrote to memory of 2076	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	51
PID 2880 wrote to memory of 2076	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	51
PID 2880 wrote to memory of 760	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	53
PID 2880 wrote to memory of 760	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	53
PID 2880 wrote to memory of 760	2880	BESTDISCORDIPPULLERMAMBAPULLER.exe	53
PID 760 wrote to memory of 2352	760	cmd.exe	55
PID 760 wrote to memory of 2352	760	cmd.exe	55
PID 760 wrote to memory of 2352	760	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2748	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BESTDISCORDIPPULLERMAMBAPULLER.exe
"C:\Users\Admin\AppData\Local\Temp\BESTDISCORDIPPULLERMAMBAPULLER.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2880
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2204
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BESTDISCORDIPPULLERMAMBAPULLER.exe"
  2⤵
  - Views/modifies file attributes
  PID:2748
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\BESTDISCORDIPPULLERMAMBAPULLER.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2640
- 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:2680
- 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:2508
- 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:2936
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1140
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1632
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:472
- 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:2516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2076
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\BESTDISCORDIPPULLERMAMBAPULLER.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:760
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2352

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
799111c307b228dc7531ed92ec2d7ca3

SHA1
c5858c57be399f303bb2f2d5df0fe4d13c94794c

SHA256
03542b3b8e014865d20319a2059ecf2a160f102c0240c02c23ada131390cb6f7

SHA512
6351efc6fb73038f045e8649d35af4e6e6971f3bf995927a03a1cfbf08048b64cfda1b82d096e6611924093781caecf214eafbe19ba8b43e4618478fa65c0284

Download Submit
memory/2516-47-0x00000000023A0000-0x00000000023A8000-memory.dmp

Filesize
32KB

Download
memory/2640-7-0x000000001B1B0000-0x000000001B492000-memory.dmp

Filesize
2.9MB

Download
memory/2640-8-0x0000000001C80000-0x0000000001C88000-memory.dmp

Filesize
32KB

Download
memory/2680-14-0x000000001B2A0000-0x000000001B582000-memory.dmp

Filesize
2.9MB

Download
memory/2680-15-0x0000000002320000-0x0000000002328000-memory.dmp

Filesize
32KB

Download
memory/2880-0-0x000007FEF5A53000-0x000007FEF5A54000-memory.dmp

Filesize
4KB

Download
memory/2880-39-0x000007FEF5A53000-0x000007FEF5A54000-memory.dmp

Filesize
4KB

Download
memory/2880-2-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-46-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download
memory/2880-1-0x0000000000250000-0x0000000000290000-memory.dmp

Filesize
256KB

Download
memory/2880-52-0x000007FEF5A50000-0x000007FEF643C000-memory.dmp

Filesize
9.9MB

Download