umbral | 733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277

Analysis

max time kernel
20s
max time network
23s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
19-09-2024 03:25

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General

Target

733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe
Size

227KB
MD5

a9c85ce4900aa26ca173db8d18423290
SHA1

913ff9008ac363798994a5db576357623c3abb6b
SHA256

733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277
SHA512

2d2eb846ea057068ce639c39494adea686bbc76b7cce0eb4c0ea7396f0048bb3fafe3d9b24421d906d321576b8f3ac6517d4fa69886fecf958690b8fdf844cc9
SSDEEP

6144:eloZM+rIkd8g+EtXHkv/iD4mI1UOsTPkhFQu//O6vb8e1m0Li:IoZtL+EP8mI1UOsTPkhFQu//OAg

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/904-1-0x0000000000300000-0x0000000000340000-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
2816	powershell.exe
3068	powershell.exe
1060	powershell.exe
2616	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe

Deletes itself 1 IoCs

pid	Process
2168	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
10	discord.com
9	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
2168	cmd.exe
2176	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2144	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2176	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe
2816	powershell.exe
2616	powershell.exe
3068	powershell.exe
2444	powershell.exe
1060	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe
Token: SeIncreaseQuotaPrivilege	272	wmic.exe
Token: SeSecurityPrivilege	272	wmic.exe
Token: SeTakeOwnershipPrivilege	272	wmic.exe
Token: SeLoadDriverPrivilege	272	wmic.exe
Token: SeSystemProfilePrivilege	272	wmic.exe
Token: SeSystemtimePrivilege	272	wmic.exe
Token: SeProfSingleProcessPrivilege	272	wmic.exe
Token: SeIncBasePriorityPrivilege	272	wmic.exe
Token: SeCreatePagefilePrivilege	272	wmic.exe
Token: SeBackupPrivilege	272	wmic.exe
Token: SeRestorePrivilege	272	wmic.exe
Token: SeShutdownPrivilege	272	wmic.exe
Token: SeDebugPrivilege	272	wmic.exe
Token: SeSystemEnvironmentPrivilege	272	wmic.exe
Token: SeRemoteShutdownPrivilege	272	wmic.exe
Token: SeUndockPrivilege	272	wmic.exe
Token: SeManageVolumePrivilege	272	wmic.exe
Token: 33	272	wmic.exe
Token: 34	272	wmic.exe
Token: 35	272	wmic.exe
Token: SeIncreaseQuotaPrivilege	272	wmic.exe
Token: SeSecurityPrivilege	272	wmic.exe
Token: SeTakeOwnershipPrivilege	272	wmic.exe
Token: SeLoadDriverPrivilege	272	wmic.exe
Token: SeSystemProfilePrivilege	272	wmic.exe
Token: SeSystemtimePrivilege	272	wmic.exe
Token: SeProfSingleProcessPrivilege	272	wmic.exe
Token: SeIncBasePriorityPrivilege	272	wmic.exe
Token: SeCreatePagefilePrivilege	272	wmic.exe
Token: SeBackupPrivilege	272	wmic.exe
Token: SeRestorePrivilege	272	wmic.exe
Token: SeShutdownPrivilege	272	wmic.exe
Token: SeDebugPrivilege	272	wmic.exe
Token: SeSystemEnvironmentPrivilege	272	wmic.exe
Token: SeRemoteShutdownPrivilege	272	wmic.exe
Token: SeUndockPrivilege	272	wmic.exe
Token: SeManageVolumePrivilege	272	wmic.exe
Token: 33	272	wmic.exe
Token: 34	272	wmic.exe
Token: 35	272	wmic.exe
Token: SeDebugPrivilege	2816	powershell.exe
Token: SeDebugPrivilege	2616	powershell.exe
Token: SeDebugPrivilege	3068	powershell.exe
Token: SeDebugPrivilege	2444	powershell.exe
Token: SeIncreaseQuotaPrivilege	588	wmic.exe
Token: SeSecurityPrivilege	588	wmic.exe
Token: SeTakeOwnershipPrivilege	588	wmic.exe
Token: SeLoadDriverPrivilege	588	wmic.exe
Token: SeSystemProfilePrivilege	588	wmic.exe
Token: SeSystemtimePrivilege	588	wmic.exe
Token: SeProfSingleProcessPrivilege	588	wmic.exe
Token: SeIncBasePriorityPrivilege	588	wmic.exe
Token: SeCreatePagefilePrivilege	588	wmic.exe
Token: SeBackupPrivilege	588	wmic.exe
Token: SeRestorePrivilege	588	wmic.exe
Token: SeShutdownPrivilege	588	wmic.exe
Token: SeDebugPrivilege	588	wmic.exe
Token: SeSystemEnvironmentPrivilege	588	wmic.exe
Token: SeRemoteShutdownPrivilege	588	wmic.exe
Token: SeUndockPrivilege	588	wmic.exe
Token: SeManageVolumePrivilege	588	wmic.exe
Token: 33	588	wmic.exe
Token: 34	588	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 904 wrote to memory of 272	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	29
PID 904 wrote to memory of 272	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	29
PID 904 wrote to memory of 272	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	29
PID 904 wrote to memory of 2704	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	32
PID 904 wrote to memory of 2704	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	32
PID 904 wrote to memory of 2704	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	32
PID 904 wrote to memory of 2816	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	34
PID 904 wrote to memory of 2816	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	34
PID 904 wrote to memory of 2816	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	34
PID 904 wrote to memory of 2616	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	36
PID 904 wrote to memory of 2616	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	36
PID 904 wrote to memory of 2616	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	36
PID 904 wrote to memory of 3068	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	38
PID 904 wrote to memory of 3068	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	38
PID 904 wrote to memory of 3068	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	38
PID 904 wrote to memory of 2444	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	40
PID 904 wrote to memory of 2444	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	40
PID 904 wrote to memory of 2444	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	40
PID 904 wrote to memory of 588	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	42
PID 904 wrote to memory of 588	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	42
PID 904 wrote to memory of 588	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	42
PID 904 wrote to memory of 1540	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	44
PID 904 wrote to memory of 1540	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	44
PID 904 wrote to memory of 1540	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	44
PID 904 wrote to memory of 2948	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	46
PID 904 wrote to memory of 2948	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	46
PID 904 wrote to memory of 2948	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	46
PID 904 wrote to memory of 1060	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	48
PID 904 wrote to memory of 1060	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	48
PID 904 wrote to memory of 1060	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	48
PID 904 wrote to memory of 2144	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	50
PID 904 wrote to memory of 2144	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	50
PID 904 wrote to memory of 2144	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	50
PID 904 wrote to memory of 2168	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	52
PID 904 wrote to memory of 2168	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	52
PID 904 wrote to memory of 2168	904	733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe	52
PID 2168 wrote to memory of 2176	2168	cmd.exe	54
PID 2168 wrote to memory of 2176	2168	cmd.exe	54
PID 2168 wrote to memory of 2176	2168	cmd.exe	54

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2704	attrib.exe

C:\Users\Admin\AppData\Local\Temp\733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe
"C:\Users\Admin\AppData\Local\Temp\733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:904
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:272
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe"
  2⤵
  - Views/modifies file attributes
  PID:2704
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2816
- 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:2616
- 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:3068
- 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:2444
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:588
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1540
- 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:1060
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2144
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\733c9f0a21cb6a4386496fa43fd1b2255e07adec398ea5a296523ffbacf83277N.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2168
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2176

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
da874ae3229cdb58283b2f204777d039

SHA1
28b3ff96149066e1ba62cac701f66a52c05f533f

SHA256
19675f8169c5bd23f0986f0aa94c8b08bdd17737a7acebff8e4640027fe2c1cd

SHA512
2a3b3e743d34f69b8454f6e24f4c8fa60f2ea33b3c33145ef090f8974a1b2df9d0294c1024269fdbb3e8838615c61367c72870d2951663c9a7803aad198a867a

Download Submit
memory/904-30-0x000007FEF5F53000-0x000007FEF5F54000-memory.dmp

Filesize
4KB

Download
memory/904-1-0x0000000000300000-0x0000000000340000-memory.dmp

Filesize
256KB

Download
memory/904-2-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

Filesize
9.9MB

Download
memory/904-49-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

Filesize
9.9MB

Download
memory/904-0-0x000007FEF5F53000-0x000007FEF5F54000-memory.dmp

Filesize
4KB

Download
memory/904-36-0x000007FEF5F50000-0x000007FEF693C000-memory.dmp

Filesize
9.9MB

Download
memory/1060-45-0x00000000026D0000-0x00000000026D8000-memory.dmp

Filesize
32KB

Download
memory/2616-14-0x000000001B310000-0x000000001B5F2000-memory.dmp

Filesize
2.9MB

Download
memory/2616-15-0x0000000002510000-0x0000000002518000-memory.dmp

Filesize
32KB

Download
memory/2816-8-0x00000000020C0000-0x00000000020C8000-memory.dmp

Filesize
32KB

Download
memory/2816-7-0x000000001B310000-0x000000001B5F2000-memory.dmp

Filesize
2.9MB

Download