umbral | 435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92

Analysis

max time kernel
122s
max time network
126s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
19-09-2024 08:34

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General

Target

435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe
Size

231KB
MD5

3b915b9bbc5ddf429f85bf939febe424
SHA1

2278baaf3764a27bc962de75601f4d49b2191592
SHA256

435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92
SHA512

d83341bf784bed732bf120299824ea066f66f505b6dd0fb0b84396af34877a1ba0c483c805835179be2463dd34503b31260035e78f47ca1396305f60f2be50ed
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD4LmfzMOsTPkPFQu//OPub8e1mt6i:DoZtL+EP8LwzMOsTPkPFQu//OKO/

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2032-1-0x0000000000F20000-0x0000000000F60000-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
2888	powershell.exe
2684	powershell.exe
1408	powershell.exe
2288	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe

Deletes itself 1 IoCs

pid	Process
2384	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
2384	cmd.exe
2496	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2360	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2496	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe
2888	powershell.exe
2288	powershell.exe
2684	powershell.exe
2604	powershell.exe
1408	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe
Token: 33	2020	wmic.exe
Token: 34	2020	wmic.exe
Token: 35	2020	wmic.exe
Token: SeIncreaseQuotaPrivilege	2020	wmic.exe
Token: SeSecurityPrivilege	2020	wmic.exe
Token: SeTakeOwnershipPrivilege	2020	wmic.exe
Token: SeLoadDriverPrivilege	2020	wmic.exe
Token: SeSystemProfilePrivilege	2020	wmic.exe
Token: SeSystemtimePrivilege	2020	wmic.exe
Token: SeProfSingleProcessPrivilege	2020	wmic.exe
Token: SeIncBasePriorityPrivilege	2020	wmic.exe
Token: SeCreatePagefilePrivilege	2020	wmic.exe
Token: SeBackupPrivilege	2020	wmic.exe
Token: SeRestorePrivilege	2020	wmic.exe
Token: SeShutdownPrivilege	2020	wmic.exe
Token: SeDebugPrivilege	2020	wmic.exe
Token: SeSystemEnvironmentPrivilege	2020	wmic.exe
Token: SeRemoteShutdownPrivilege	2020	wmic.exe
Token: SeUndockPrivilege	2020	wmic.exe
Token: SeManageVolumePrivilege	2020	wmic.exe
Token: 33	2020	wmic.exe
Token: 34	2020	wmic.exe
Token: 35	2020	wmic.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	2288	powershell.exe
Token: SeDebugPrivilege	2684	powershell.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeIncreaseQuotaPrivilege	2968	wmic.exe
Token: SeSecurityPrivilege	2968	wmic.exe
Token: SeTakeOwnershipPrivilege	2968	wmic.exe
Token: SeLoadDriverPrivilege	2968	wmic.exe
Token: SeSystemProfilePrivilege	2968	wmic.exe
Token: SeSystemtimePrivilege	2968	wmic.exe
Token: SeProfSingleProcessPrivilege	2968	wmic.exe
Token: SeIncBasePriorityPrivilege	2968	wmic.exe
Token: SeCreatePagefilePrivilege	2968	wmic.exe
Token: SeBackupPrivilege	2968	wmic.exe
Token: SeRestorePrivilege	2968	wmic.exe
Token: SeShutdownPrivilege	2968	wmic.exe
Token: SeDebugPrivilege	2968	wmic.exe
Token: SeSystemEnvironmentPrivilege	2968	wmic.exe
Token: SeRemoteShutdownPrivilege	2968	wmic.exe
Token: SeUndockPrivilege	2968	wmic.exe
Token: SeManageVolumePrivilege	2968	wmic.exe
Token: 33	2968	wmic.exe
Token: 34	2968	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 2020	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	31
PID 2032 wrote to memory of 2020	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	31
PID 2032 wrote to memory of 2020	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	31
PID 2032 wrote to memory of 2804	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	34
PID 2032 wrote to memory of 2804	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	34
PID 2032 wrote to memory of 2804	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	34
PID 2032 wrote to memory of 2888	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	36
PID 2032 wrote to memory of 2888	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	36
PID 2032 wrote to memory of 2888	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	36
PID 2032 wrote to memory of 2288	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	38
PID 2032 wrote to memory of 2288	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	38
PID 2032 wrote to memory of 2288	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	38
PID 2032 wrote to memory of 2684	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	40
PID 2032 wrote to memory of 2684	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	40
PID 2032 wrote to memory of 2684	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	40
PID 2032 wrote to memory of 2604	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	42
PID 2032 wrote to memory of 2604	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	42
PID 2032 wrote to memory of 2604	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	42
PID 2032 wrote to memory of 2968	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	44
PID 2032 wrote to memory of 2968	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	44
PID 2032 wrote to memory of 2968	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	44
PID 2032 wrote to memory of 3004	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	46
PID 2032 wrote to memory of 3004	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	46
PID 2032 wrote to memory of 3004	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	46
PID 2032 wrote to memory of 1840	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	48
PID 2032 wrote to memory of 1840	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	48
PID 2032 wrote to memory of 1840	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	48
PID 2032 wrote to memory of 1408	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	50
PID 2032 wrote to memory of 1408	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	50
PID 2032 wrote to memory of 1408	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	50
PID 2032 wrote to memory of 2360	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	52
PID 2032 wrote to memory of 2360	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	52
PID 2032 wrote to memory of 2360	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	52
PID 2032 wrote to memory of 2384	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	54
PID 2032 wrote to memory of 2384	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	54
PID 2032 wrote to memory of 2384	2032	435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe	54
PID 2384 wrote to memory of 2496	2384	cmd.exe	56
PID 2384 wrote to memory of 2496	2384	cmd.exe	56
PID 2384 wrote to memory of 2496	2384	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2804	attrib.exe

C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe
"C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2020
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe"
  2⤵
  - Views/modifies file attributes
  PID:2804
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2888
- 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:2288
- 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:2684
- 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:2604
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3004
- 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:1408
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2360
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\435a2c3b87a6d4e96690d2aae112660823dc52740222c85a80e5f01e9910ee92.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2384
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2496

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
7d4236bcefd1380b969e742b6bb31efc

SHA1
16edc0b53602f50400f5905660a09754f8bfccdd

SHA256
a884bd4faddfc11e6706afe7ff61646907e547191170d85e72b37bb3df954038

SHA512
1f44cc381b8f18afa23427d979cf05840f33899efdc25bbc3e237692562649f4dca2f9e6d4ffa45d96b1c9393d8f59a6f1c29d5733a8e655ba7c371240235f6a

Download Submit
memory/1408-44-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/2032-0-0x000007FEF5EF3000-0x000007FEF5EF4000-memory.dmp

Filesize
4KB

Download
memory/2032-1-0x0000000000F20000-0x0000000000F60000-memory.dmp

Filesize
256KB

Download
memory/2032-2-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/2032-48-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

Filesize
9.9MB

Download
memory/2288-14-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/2288-15-0x00000000023A0000-0x00000000023A8000-memory.dmp

Filesize
32KB

Download
memory/2888-7-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/2888-8-0x0000000001D70000-0x0000000001D78000-memory.dmp

Filesize
32KB

Download