umbral | 1563b6bc82b3606302ccfc90be5068858eaa4d7a9544fe67b2500228c707c992

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
25-12-2024 16:55

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General

Target

PesmobileGen.exe
Size

231KB
MD5

f55b6dd676bb7064d38a1eaac5b08f69
SHA1

f772349cd296f12d6399fc613c0c898696ac89a7
SHA256

1563b6bc82b3606302ccfc90be5068858eaa4d7a9544fe67b2500228c707c992
SHA512

251ddb5bcb67ae9e3699c237e49452afcc7335e12eae14fb2b5834b847fec3be980ba9c05f1568dad35e84245f157c9a67ee7b5551e7bfbeb6b1ea086966851f
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD4EMzNkqNlOQLWU1pAzg3b8e1mei:DoZdL+EP8EMzNkqNlOQLWU1pAzmM

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3056-1-0x0000000000C70000-0x0000000000CB0000-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
2092	powershell.exe
2860	powershell.exe
2628	powershell.exe
1056	powershell.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
8	discord.com
9	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1764	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2092	powershell.exe
2860	powershell.exe
2628	powershell.exe
2728	powershell.exe
1056	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3056	PesmobileGen.exe
Token: SeDebugPrivilege	2092	powershell.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	2728	powershell.exe
Token: SeIncreaseQuotaPrivilege	876	wmic.exe
Token: SeSecurityPrivilege	876	wmic.exe
Token: SeTakeOwnershipPrivilege	876	wmic.exe
Token: SeLoadDriverPrivilege	876	wmic.exe
Token: SeSystemProfilePrivilege	876	wmic.exe
Token: SeSystemtimePrivilege	876	wmic.exe
Token: SeProfSingleProcessPrivilege	876	wmic.exe
Token: SeIncBasePriorityPrivilege	876	wmic.exe
Token: SeCreatePagefilePrivilege	876	wmic.exe
Token: SeBackupPrivilege	876	wmic.exe
Token: SeRestorePrivilege	876	wmic.exe
Token: SeShutdownPrivilege	876	wmic.exe
Token: SeDebugPrivilege	876	wmic.exe
Token: SeSystemEnvironmentPrivilege	876	wmic.exe
Token: SeRemoteShutdownPrivilege	876	wmic.exe
Token: SeUndockPrivilege	876	wmic.exe
Token: SeManageVolumePrivilege	876	wmic.exe
Token: 33	876	wmic.exe
Token: 34	876	wmic.exe
Token: 35	876	wmic.exe
Token: SeIncreaseQuotaPrivilege	876	wmic.exe
Token: SeSecurityPrivilege	876	wmic.exe
Token: SeTakeOwnershipPrivilege	876	wmic.exe
Token: SeLoadDriverPrivilege	876	wmic.exe
Token: SeSystemProfilePrivilege	876	wmic.exe
Token: SeSystemtimePrivilege	876	wmic.exe
Token: SeProfSingleProcessPrivilege	876	wmic.exe
Token: SeIncBasePriorityPrivilege	876	wmic.exe
Token: SeCreatePagefilePrivilege	876	wmic.exe
Token: SeBackupPrivilege	876	wmic.exe
Token: SeRestorePrivilege	876	wmic.exe
Token: SeShutdownPrivilege	876	wmic.exe
Token: SeDebugPrivilege	876	wmic.exe
Token: SeSystemEnvironmentPrivilege	876	wmic.exe
Token: SeRemoteShutdownPrivilege	876	wmic.exe
Token: SeUndockPrivilege	876	wmic.exe
Token: SeManageVolumePrivilege	876	wmic.exe
Token: 33	876	wmic.exe
Token: 34	876	wmic.exe
Token: 35	876	wmic.exe
Token: SeIncreaseQuotaPrivilege	1348	wmic.exe
Token: SeSecurityPrivilege	1348	wmic.exe
Token: SeTakeOwnershipPrivilege	1348	wmic.exe
Token: SeLoadDriverPrivilege	1348	wmic.exe
Token: SeSystemProfilePrivilege	1348	wmic.exe
Token: SeSystemtimePrivilege	1348	wmic.exe
Token: SeProfSingleProcessPrivilege	1348	wmic.exe
Token: SeIncBasePriorityPrivilege	1348	wmic.exe
Token: SeCreatePagefilePrivilege	1348	wmic.exe
Token: SeBackupPrivilege	1348	wmic.exe
Token: SeRestorePrivilege	1348	wmic.exe
Token: SeShutdownPrivilege	1348	wmic.exe
Token: SeDebugPrivilege	1348	wmic.exe
Token: SeSystemEnvironmentPrivilege	1348	wmic.exe
Token: SeRemoteShutdownPrivilege	1348	wmic.exe
Token: SeUndockPrivilege	1348	wmic.exe
Token: SeManageVolumePrivilege	1348	wmic.exe
Token: 33	1348	wmic.exe
Token: 34	1348	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 3056 wrote to memory of 2092	3056	PesmobileGen.exe	30
PID 3056 wrote to memory of 2092	3056	PesmobileGen.exe	30
PID 3056 wrote to memory of 2092	3056	PesmobileGen.exe	30
PID 3056 wrote to memory of 2860	3056	PesmobileGen.exe	32
PID 3056 wrote to memory of 2860	3056	PesmobileGen.exe	32
PID 3056 wrote to memory of 2860	3056	PesmobileGen.exe	32
PID 3056 wrote to memory of 2628	3056	PesmobileGen.exe	34
PID 3056 wrote to memory of 2628	3056	PesmobileGen.exe	34
PID 3056 wrote to memory of 2628	3056	PesmobileGen.exe	34
PID 3056 wrote to memory of 2728	3056	PesmobileGen.exe	36
PID 3056 wrote to memory of 2728	3056	PesmobileGen.exe	36
PID 3056 wrote to memory of 2728	3056	PesmobileGen.exe	36
PID 3056 wrote to memory of 876	3056	PesmobileGen.exe	38
PID 3056 wrote to memory of 876	3056	PesmobileGen.exe	38
PID 3056 wrote to memory of 876	3056	PesmobileGen.exe	38
PID 3056 wrote to memory of 1348	3056	PesmobileGen.exe	41
PID 3056 wrote to memory of 1348	3056	PesmobileGen.exe	41
PID 3056 wrote to memory of 1348	3056	PesmobileGen.exe	41
PID 3056 wrote to memory of 2016	3056	PesmobileGen.exe	43
PID 3056 wrote to memory of 2016	3056	PesmobileGen.exe	43
PID 3056 wrote to memory of 2016	3056	PesmobileGen.exe	43
PID 3056 wrote to memory of 1056	3056	PesmobileGen.exe	45
PID 3056 wrote to memory of 1056	3056	PesmobileGen.exe	45
PID 3056 wrote to memory of 1056	3056	PesmobileGen.exe	45
PID 3056 wrote to memory of 1764	3056	PesmobileGen.exe	47
PID 3056 wrote to memory of 1764	3056	PesmobileGen.exe	47
PID 3056 wrote to memory of 1764	3056	PesmobileGen.exe	47

C:\Users\Admin\AppData\Local\Temp\PesmobileGen.exe
"C:\Users\Admin\AppData\Local\Temp\PesmobileGen.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3056
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\PesmobileGen.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2092
- 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:2860
- 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:2628
- 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:2728
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:876
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1348
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2016
- 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:1056
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1764

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
3b2003a6be2fff7d0e5d340e9b2e646a

SHA1
7e02accd56149e1e8145ce5f55c7f64e5b8c185a

SHA256
465db58bd6941c4f598cb8cce6024f11ce5daa27e21a74b01fdc04006d8e02ba

SHA512
bb7383a5242039d8d2cbc84e17f5fb61333318a6b86b37023dfc49f1b14e6579f8b0a73ff1a337bdb201874712d8c71f9afc4af4f89c81e2da4eb9ef22fdc88b

Download Submit
memory/2092-12-0x000007FEED260000-0x000007FEEDBFD000-memory.dmp

Filesize
9.6MB

Download
memory/2092-13-0x000007FEED260000-0x000007FEEDBFD000-memory.dmp

Filesize
9.6MB

Download
memory/2092-8-0x000007FEED260000-0x000007FEEDBFD000-memory.dmp

Filesize
9.6MB

Download
memory/2092-10-0x0000000002070000-0x0000000002078000-memory.dmp

Filesize
32KB

Download
memory/2092-9-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2092-11-0x000007FEED260000-0x000007FEEDBFD000-memory.dmp

Filesize
9.6MB

Download
memory/2092-7-0x000007FEED51E000-0x000007FEED51F000-memory.dmp

Filesize
4KB

Download
memory/2860-19-0x000000001B780000-0x000000001BA62000-memory.dmp

Filesize
2.9MB

Download
memory/2860-20-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

Filesize
32KB

Download
memory/3056-0-0x000007FEF58B3000-0x000007FEF58B4000-memory.dmp

Filesize
4KB

Download
memory/3056-2-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

Filesize
9.9MB

Download
memory/3056-40-0x000007FEF58B3000-0x000007FEF58B4000-memory.dmp

Filesize
4KB

Download
memory/3056-41-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

Filesize
9.9MB

Download
memory/3056-1-0x0000000000C70000-0x0000000000CB0000-memory.dmp

Filesize
256KB

Download
memory/3056-51-0x000007FEF58B0000-0x000007FEF629C000-memory.dmp

Filesize
9.9MB

Download