umbral | 6e1f345ac5ec917d43779e0087d731fbdf67645b7e74e83d63c7f21e82fb63aa

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
26-08-2024 20:33

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General

Target

passprocbeta.exe
Size

227KB
MD5

4ba03d958d930223cdd9b50885365ddf
SHA1

f111036fad34212ae876170478f57c8fb2e714be
SHA256

6e1f345ac5ec917d43779e0087d731fbdf67645b7e74e83d63c7f21e82fb63aa
SHA512

d1e655aebc11e00e7c23a1b37c75ed1207e5b007aaa1a595d18d1738e84c934225c164be507b4f561b8352abaa36294f4413e95d0fd7a6f230d6789a50fd0d15
SSDEEP

6144:+loZM+rIkd8g+EtXHkv/iD4hn9vCg/7IjR0STTKqFb8e1mLi:ooZtL+EP8hn9vCg/7IjR0STTK+d

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2532-1-0x0000000000A40000-0x0000000000A80000-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
2624	powershell.exe
2752	powershell.exe
2096	powershell.exe
1264	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
1096	cmd.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
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
1096	cmd.exe
332	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1812	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
332	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2532	passprocbeta.exe
2624	powershell.exe
2752	powershell.exe
2096	powershell.exe
672	powershell.exe
1264	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2532	passprocbeta.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	2624	powershell.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	672	powershell.exe
Token: SeIncreaseQuotaPrivilege	2860	wmic.exe
Token: SeSecurityPrivilege	2860	wmic.exe
Token: SeTakeOwnershipPrivilege	2860	wmic.exe
Token: SeLoadDriverPrivilege	2860	wmic.exe
Token: SeSystemProfilePrivilege	2860	wmic.exe
Token: SeSystemtimePrivilege	2860	wmic.exe
Token: SeProfSingleProcessPrivilege	2860	wmic.exe
Token: SeIncBasePriorityPrivilege	2860	wmic.exe
Token: SeCreatePagefilePrivilege	2860	wmic.exe
Token: SeBackupPrivilege	2860	wmic.exe
Token: SeRestorePrivilege	2860	wmic.exe
Token: SeShutdownPrivilege	2860	wmic.exe
Token: SeDebugPrivilege	2860	wmic.exe
Token: SeSystemEnvironmentPrivilege	2860	wmic.exe
Token: SeRemoteShutdownPrivilege	2860	wmic.exe
Token: SeUndockPrivilege	2860	wmic.exe
Token: SeManageVolumePrivilege	2860	wmic.exe
Token: 33	2860	wmic.exe
Token: 34	2860	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2532 wrote to memory of 2240	2532	passprocbeta.exe	30
PID 2532 wrote to memory of 2240	2532	passprocbeta.exe	30
PID 2532 wrote to memory of 2240	2532	passprocbeta.exe	30
PID 2532 wrote to memory of 2720	2532	passprocbeta.exe	33
PID 2532 wrote to memory of 2720	2532	passprocbeta.exe	33
PID 2532 wrote to memory of 2720	2532	passprocbeta.exe	33
PID 2532 wrote to memory of 2624	2532	passprocbeta.exe	35
PID 2532 wrote to memory of 2624	2532	passprocbeta.exe	35
PID 2532 wrote to memory of 2624	2532	passprocbeta.exe	35
PID 2532 wrote to memory of 2752	2532	passprocbeta.exe	37
PID 2532 wrote to memory of 2752	2532	passprocbeta.exe	37
PID 2532 wrote to memory of 2752	2532	passprocbeta.exe	37
PID 2532 wrote to memory of 2096	2532	passprocbeta.exe	39
PID 2532 wrote to memory of 2096	2532	passprocbeta.exe	39
PID 2532 wrote to memory of 2096	2532	passprocbeta.exe	39
PID 2532 wrote to memory of 672	2532	passprocbeta.exe	41
PID 2532 wrote to memory of 672	2532	passprocbeta.exe	41
PID 2532 wrote to memory of 672	2532	passprocbeta.exe	41
PID 2532 wrote to memory of 2860	2532	passprocbeta.exe	43
PID 2532 wrote to memory of 2860	2532	passprocbeta.exe	43
PID 2532 wrote to memory of 2860	2532	passprocbeta.exe	43
PID 2532 wrote to memory of 3016	2532	passprocbeta.exe	45
PID 2532 wrote to memory of 3016	2532	passprocbeta.exe	45
PID 2532 wrote to memory of 3016	2532	passprocbeta.exe	45
PID 2532 wrote to memory of 1484	2532	passprocbeta.exe	47
PID 2532 wrote to memory of 1484	2532	passprocbeta.exe	47
PID 2532 wrote to memory of 1484	2532	passprocbeta.exe	47
PID 2532 wrote to memory of 1264	2532	passprocbeta.exe	49
PID 2532 wrote to memory of 1264	2532	passprocbeta.exe	49
PID 2532 wrote to memory of 1264	2532	passprocbeta.exe	49
PID 2532 wrote to memory of 1812	2532	passprocbeta.exe	51
PID 2532 wrote to memory of 1812	2532	passprocbeta.exe	51
PID 2532 wrote to memory of 1812	2532	passprocbeta.exe	51
PID 2532 wrote to memory of 1096	2532	passprocbeta.exe	53
PID 2532 wrote to memory of 1096	2532	passprocbeta.exe	53
PID 2532 wrote to memory of 1096	2532	passprocbeta.exe	53
PID 1096 wrote to memory of 332	1096	cmd.exe	55
PID 1096 wrote to memory of 332	1096	cmd.exe	55
PID 1096 wrote to memory of 332	1096	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2720	attrib.exe

C:\Users\Admin\AppData\Local\Temp\passprocbeta.exe
"C:\Users\Admin\AppData\Local\Temp\passprocbeta.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2532
- 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\passprocbeta.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\passprocbeta.exe'
  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" 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:2752
- 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:2096
- 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:672
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3016
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1484
- 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:1264
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1812
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\passprocbeta.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1096
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:332

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
4a1a4dc8e2e0136e655898edcb19dcab

SHA1
9c8e5373d27841110fb300a04f665b1af32dadaa

SHA256
3b06aa6cdb2aaf789e76c0732965af779e0e24186b893177a4348fa80c279061

SHA512
4a5be87a0b39e6cd00a350bbfd27ec8ecc9378e155756f10c4a25f01e357fc5f3dcaf2ddaeea09463dc3f9d71396238d66d5d7fe1063f966a34928f287106e63

Download Submit
memory/1264-42-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/2532-0-0x000007FEF5343000-0x000007FEF5344000-memory.dmp

Filesize
4KB

Download
memory/2532-1-0x0000000000A40000-0x0000000000A80000-memory.dmp

Filesize
256KB

Download
memory/2532-2-0x000007FEF5340000-0x000007FEF5D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2532-46-0x000007FEF5340000-0x000007FEF5D2C000-memory.dmp

Filesize
9.9MB

Download
memory/2624-8-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

Filesize
32KB

Download
memory/2624-7-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2752-14-0x000000001B530000-0x000000001B812000-memory.dmp

Filesize
2.9MB

Download
memory/2752-15-0x0000000002870000-0x0000000002878000-memory.dmp

Filesize
32KB

Download