umbral | b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b

Analysis

max time kernel
16s
max time network
17s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28-11-2024 14:21

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General

Target

b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe
Size

229KB
MD5

63c8a7e1b6b7aceb3da5f2f6b0abc53a
SHA1

957f75df411f22c1076838f331c14d5e6e08ee31
SHA256

b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b
SHA512

e260c30ece30075f5efd0753ff8c9073be033571fc99e830bb08a30e071fd643d0fa796a78778491fcfabe479d6f7bae995dc432ff2d00f3b91753144639132a
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD4giX9UgGhZq+fiQBFUuQb8e1mLucSUi4:foZtL+EP8gI9UgGhZq+fiQBFUT33d4

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2124-1-0x00000000008A0000-0x00000000008E0000-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
1368	powershell.exe
2936	powershell.exe
2724	powershell.exe
2040	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe

Deletes itself 1 IoCs

pid	Process
1908	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
1908	cmd.exe
2476	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2900	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2476	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe
1368	powershell.exe
2936	powershell.exe
2724	powershell.exe
2488	powershell.exe
2040	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe
Token: SeIncreaseQuotaPrivilege	820	wmic.exe
Token: SeSecurityPrivilege	820	wmic.exe
Token: SeTakeOwnershipPrivilege	820	wmic.exe
Token: SeLoadDriverPrivilege	820	wmic.exe
Token: SeSystemProfilePrivilege	820	wmic.exe
Token: SeSystemtimePrivilege	820	wmic.exe
Token: SeProfSingleProcessPrivilege	820	wmic.exe
Token: SeIncBasePriorityPrivilege	820	wmic.exe
Token: SeCreatePagefilePrivilege	820	wmic.exe
Token: SeBackupPrivilege	820	wmic.exe
Token: SeRestorePrivilege	820	wmic.exe
Token: SeShutdownPrivilege	820	wmic.exe
Token: SeDebugPrivilege	820	wmic.exe
Token: SeSystemEnvironmentPrivilege	820	wmic.exe
Token: SeRemoteShutdownPrivilege	820	wmic.exe
Token: SeUndockPrivilege	820	wmic.exe
Token: SeManageVolumePrivilege	820	wmic.exe
Token: 33	820	wmic.exe
Token: 34	820	wmic.exe
Token: 35	820	wmic.exe
Token: SeIncreaseQuotaPrivilege	820	wmic.exe
Token: SeSecurityPrivilege	820	wmic.exe
Token: SeTakeOwnershipPrivilege	820	wmic.exe
Token: SeLoadDriverPrivilege	820	wmic.exe
Token: SeSystemProfilePrivilege	820	wmic.exe
Token: SeSystemtimePrivilege	820	wmic.exe
Token: SeProfSingleProcessPrivilege	820	wmic.exe
Token: SeIncBasePriorityPrivilege	820	wmic.exe
Token: SeCreatePagefilePrivilege	820	wmic.exe
Token: SeBackupPrivilege	820	wmic.exe
Token: SeRestorePrivilege	820	wmic.exe
Token: SeShutdownPrivilege	820	wmic.exe
Token: SeDebugPrivilege	820	wmic.exe
Token: SeSystemEnvironmentPrivilege	820	wmic.exe
Token: SeRemoteShutdownPrivilege	820	wmic.exe
Token: SeUndockPrivilege	820	wmic.exe
Token: SeManageVolumePrivilege	820	wmic.exe
Token: 33	820	wmic.exe
Token: 34	820	wmic.exe
Token: 35	820	wmic.exe
Token: SeDebugPrivilege	1368	powershell.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	2488	powershell.exe
Token: SeIncreaseQuotaPrivilege	2836	wmic.exe
Token: SeSecurityPrivilege	2836	wmic.exe
Token: SeTakeOwnershipPrivilege	2836	wmic.exe
Token: SeLoadDriverPrivilege	2836	wmic.exe
Token: SeSystemProfilePrivilege	2836	wmic.exe
Token: SeSystemtimePrivilege	2836	wmic.exe
Token: SeProfSingleProcessPrivilege	2836	wmic.exe
Token: SeIncBasePriorityPrivilege	2836	wmic.exe
Token: SeCreatePagefilePrivilege	2836	wmic.exe
Token: SeBackupPrivilege	2836	wmic.exe
Token: SeRestorePrivilege	2836	wmic.exe
Token: SeShutdownPrivilege	2836	wmic.exe
Token: SeDebugPrivilege	2836	wmic.exe
Token: SeSystemEnvironmentPrivilege	2836	wmic.exe
Token: SeRemoteShutdownPrivilege	2836	wmic.exe
Token: SeUndockPrivilege	2836	wmic.exe
Token: SeManageVolumePrivilege	2836	wmic.exe
Token: 33	2836	wmic.exe
Token: 34	2836	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2124 wrote to memory of 820	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	30
PID 2124 wrote to memory of 820	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	30
PID 2124 wrote to memory of 820	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	30
PID 2124 wrote to memory of 2228	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	33
PID 2124 wrote to memory of 2228	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	33
PID 2124 wrote to memory of 2228	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	33
PID 2124 wrote to memory of 1368	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	35
PID 2124 wrote to memory of 1368	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	35
PID 2124 wrote to memory of 1368	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	35
PID 2124 wrote to memory of 2936	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	37
PID 2124 wrote to memory of 2936	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	37
PID 2124 wrote to memory of 2936	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	37
PID 2124 wrote to memory of 2724	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	39
PID 2124 wrote to memory of 2724	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	39
PID 2124 wrote to memory of 2724	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	39
PID 2124 wrote to memory of 2488	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	41
PID 2124 wrote to memory of 2488	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	41
PID 2124 wrote to memory of 2488	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	41
PID 2124 wrote to memory of 2836	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	43
PID 2124 wrote to memory of 2836	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	43
PID 2124 wrote to memory of 2836	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	43
PID 2124 wrote to memory of 2116	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	45
PID 2124 wrote to memory of 2116	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	45
PID 2124 wrote to memory of 2116	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	45
PID 2124 wrote to memory of 1840	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	48
PID 2124 wrote to memory of 1840	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	48
PID 2124 wrote to memory of 1840	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	48
PID 2124 wrote to memory of 2040	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	50
PID 2124 wrote to memory of 2040	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	50
PID 2124 wrote to memory of 2040	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	50
PID 2124 wrote to memory of 2900	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	52
PID 2124 wrote to memory of 2900	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	52
PID 2124 wrote to memory of 2900	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	52
PID 2124 wrote to memory of 1908	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	54
PID 2124 wrote to memory of 1908	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	54
PID 2124 wrote to memory of 1908	2124	b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe	54
PID 1908 wrote to memory of 2476	1908	cmd.exe	56
PID 1908 wrote to memory of 2476	1908	cmd.exe	56
PID 1908 wrote to memory of 2476	1908	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2228	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe
"C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2124
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:820
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe"
  2⤵
  - Views/modifies file attributes
  PID:2228
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1368
- 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:2936
- 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:2724
- 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:2488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2116
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1840
- 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:2040
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2900
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b2bfd1500afcf35758914c882e9ced8eedd422f085eb6cb620438a92c70ef01b.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1908
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2476

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

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Downloads

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

Filesize
7KB

MD5
d3d25edb38149b7fdff449f8c61fde71

SHA1
14b74c1246ab0d3bf03c892e7dfdc469129e077d

SHA256
34667ce3ac122f4a7a90f667a7f6891aa3d5e9332b9d3aa8140744977ba418ee

SHA512
a8c0f3e53815c7f24f755bc003e1f89a248607da6130cc6a221d77427d2a99008898a96eb9296fd32a9c639a1977bbc7e0c9ffd30bdf8989799078bd239f98ea

Download Submit
memory/1368-7-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/1368-8-0x00000000028A0000-0x00000000028A8000-memory.dmp

Filesize
32KB

Download
memory/2040-43-0x00000000028A0000-0x00000000028A8000-memory.dmp

Filesize
32KB

Download
memory/2124-0-0x000007FEF58D3000-0x000007FEF58D4000-memory.dmp

Filesize
4KB

Download
memory/2124-1-0x00000000008A0000-0x00000000008E0000-memory.dmp

Filesize
256KB

Download
memory/2124-2-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2124-47-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2936-14-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2936-15-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download