umbral | 20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
21-08-2024 09:53

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General

Target

20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
Size

506KB
MD5

6f801049dc7c819dc80f015947962f47
SHA1

427c1556b90aa70d3d1b3314bc88325ea30f4687
SHA256

20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd
SHA512

d6dd99f5dcaa1717d36ab6f2ad17264416114b77750bfe90901f37bfabbd5ba2f54f43f356cf1e4db6376eb2b0a8850502ce6535f546c59799961241333bfe2e
SSDEEP

6144:uloZM9rIkd8g+EtXHkv/iD4CGYhfVeGJdMFXSy3v7Igb8e1mSiZ:4oZOL+EP8CGYhfVeGJdMFXSy3vZUZ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2984-1-0x00000000010B0000-0x0000000001136000-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
3032	powershell.exe
2664	powershell.exe
2692	powershell.exe
852	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe

Deletes itself 1 IoCs

pid	Process
2392	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
8	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
2392	cmd.exe
2648	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2592	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2648	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3032	powershell.exe
2664	powershell.exe
2692	powershell.exe
2968	powershell.exe
852	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
Token: SeDebugPrivilege	3032	powershell.exe
Token: SeDebugPrivilege	2664	powershell.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	2968	powershell.exe
Token: SeIncreaseQuotaPrivilege	1976	wmic.exe
Token: SeSecurityPrivilege	1976	wmic.exe
Token: SeTakeOwnershipPrivilege	1976	wmic.exe
Token: SeLoadDriverPrivilege	1976	wmic.exe
Token: SeSystemProfilePrivilege	1976	wmic.exe
Token: SeSystemtimePrivilege	1976	wmic.exe
Token: SeProfSingleProcessPrivilege	1976	wmic.exe
Token: SeIncBasePriorityPrivilege	1976	wmic.exe
Token: SeCreatePagefilePrivilege	1976	wmic.exe
Token: SeBackupPrivilege	1976	wmic.exe
Token: SeRestorePrivilege	1976	wmic.exe
Token: SeShutdownPrivilege	1976	wmic.exe
Token: SeDebugPrivilege	1976	wmic.exe
Token: SeSystemEnvironmentPrivilege	1976	wmic.exe
Token: SeRemoteShutdownPrivilege	1976	wmic.exe
Token: SeUndockPrivilege	1976	wmic.exe
Token: SeManageVolumePrivilege	1976	wmic.exe
Token: 33	1976	wmic.exe
Token: 34	1976	wmic.exe
Token: 35	1976	wmic.exe
Token: SeIncreaseQuotaPrivilege	1976	wmic.exe
Token: SeSecurityPrivilege	1976	wmic.exe
Token: SeTakeOwnershipPrivilege	1976	wmic.exe
Token: SeLoadDriverPrivilege	1976	wmic.exe
Token: SeSystemProfilePrivilege	1976	wmic.exe
Token: SeSystemtimePrivilege	1976	wmic.exe
Token: SeProfSingleProcessPrivilege	1976	wmic.exe
Token: SeIncBasePriorityPrivilege	1976	wmic.exe
Token: SeCreatePagefilePrivilege	1976	wmic.exe
Token: SeBackupPrivilege	1976	wmic.exe
Token: SeRestorePrivilege	1976	wmic.exe
Token: SeShutdownPrivilege	1976	wmic.exe
Token: SeDebugPrivilege	1976	wmic.exe
Token: SeSystemEnvironmentPrivilege	1976	wmic.exe
Token: SeRemoteShutdownPrivilege	1976	wmic.exe
Token: SeUndockPrivilege	1976	wmic.exe
Token: SeManageVolumePrivilege	1976	wmic.exe
Token: 33	1976	wmic.exe
Token: 34	1976	wmic.exe
Token: 35	1976	wmic.exe
Token: SeIncreaseQuotaPrivilege	1000	wmic.exe
Token: SeSecurityPrivilege	1000	wmic.exe
Token: SeTakeOwnershipPrivilege	1000	wmic.exe
Token: SeLoadDriverPrivilege	1000	wmic.exe
Token: SeSystemProfilePrivilege	1000	wmic.exe
Token: SeSystemtimePrivilege	1000	wmic.exe
Token: SeProfSingleProcessPrivilege	1000	wmic.exe
Token: SeIncBasePriorityPrivilege	1000	wmic.exe
Token: SeCreatePagefilePrivilege	1000	wmic.exe
Token: SeBackupPrivilege	1000	wmic.exe
Token: SeRestorePrivilege	1000	wmic.exe
Token: SeShutdownPrivilege	1000	wmic.exe
Token: SeDebugPrivilege	1000	wmic.exe
Token: SeSystemEnvironmentPrivilege	1000	wmic.exe
Token: SeRemoteShutdownPrivilege	1000	wmic.exe
Token: SeUndockPrivilege	1000	wmic.exe
Token: SeManageVolumePrivilege	1000	wmic.exe
Token: 33	1000	wmic.exe
Token: 34	1000	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2984 wrote to memory of 2140	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	31
PID 2984 wrote to memory of 2140	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	31
PID 2984 wrote to memory of 2140	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	31
PID 2984 wrote to memory of 3032	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	33
PID 2984 wrote to memory of 3032	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	33
PID 2984 wrote to memory of 3032	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	33
PID 2984 wrote to memory of 2664	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	35
PID 2984 wrote to memory of 2664	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	35
PID 2984 wrote to memory of 2664	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	35
PID 2984 wrote to memory of 2692	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	37
PID 2984 wrote to memory of 2692	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	37
PID 2984 wrote to memory of 2692	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	37
PID 2984 wrote to memory of 2968	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	39
PID 2984 wrote to memory of 2968	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	39
PID 2984 wrote to memory of 2968	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	39
PID 2984 wrote to memory of 1976	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	41
PID 2984 wrote to memory of 1976	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	41
PID 2984 wrote to memory of 1976	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	41
PID 2984 wrote to memory of 1000	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	44
PID 2984 wrote to memory of 1000	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	44
PID 2984 wrote to memory of 1000	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	44
PID 2984 wrote to memory of 1720	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	46
PID 2984 wrote to memory of 1720	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	46
PID 2984 wrote to memory of 1720	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	46
PID 2984 wrote to memory of 852	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	48
PID 2984 wrote to memory of 852	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	48
PID 2984 wrote to memory of 852	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	48
PID 2984 wrote to memory of 2592	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	50
PID 2984 wrote to memory of 2592	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	50
PID 2984 wrote to memory of 2592	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	50
PID 2984 wrote to memory of 2392	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	52
PID 2984 wrote to memory of 2392	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	52
PID 2984 wrote to memory of 2392	2984	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	52
PID 2392 wrote to memory of 2648	2392	cmd.exe	54
PID 2392 wrote to memory of 2648	2392	cmd.exe	54
PID 2392 wrote to memory of 2648	2392	cmd.exe	54

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2140	attrib.exe

C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
"C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2984
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe"
  2⤵
  - Views/modifies file attributes
  PID:2140
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3032
- 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:2664
- 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:2692
- 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:2968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1976
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1000
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1720
- 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:852
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2592
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2392
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2648

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\C03Z61WPR41EP1E172HI.temp

Filesize
7KB

MD5
b13040fe9c7a2771b11d95e17e11439b

SHA1
672495a108c516ed656649bd2f835ba73678971a

SHA256
e2dbaf783d01d147449903261aab7e91209de1d63c9421a03c57d49df5184b3a

SHA512
5b21ed4b529ec10cc3cd6ed8f8f579c8ab7aec6c59bbe6e25cd14947aa68941843039dc06d121649ff0528b7ed2216a7ab72bfe49026c3f187619ce2c1725fcb

Download Submit
memory/852-47-0x000000001B710000-0x000000001B9F2000-memory.dmp

Filesize
2.9MB

Download
memory/2664-19-0x0000000001DF0000-0x0000000001DF8000-memory.dmp

Filesize
32KB

Download
memory/2664-18-0x000000001B790000-0x000000001BA72000-memory.dmp

Filesize
2.9MB

Download
memory/2984-1-0x00000000010B0000-0x0000000001136000-memory.dmp

Filesize
536KB

Download
memory/2984-2-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2984-51-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2984-0-0x000007FEF5B63000-0x000007FEF5B64000-memory.dmp

Filesize
4KB

Download
memory/3032-8-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/3032-12-0x000007FEEDBF0000-0x000007FEEE58D000-memory.dmp

Filesize
9.6MB

Download
memory/3032-10-0x0000000002C14000-0x0000000002C17000-memory.dmp

Filesize
12KB

Download
memory/3032-11-0x0000000002C1B000-0x0000000002C82000-memory.dmp

Filesize
412KB

Download
memory/3032-9-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/3032-7-0x000007FEEDEAE000-0x000007FEEDEAF000-memory.dmp

Filesize
4KB

Download
memory/3032-52-0x000007FEEDBF0000-0x000007FEEE58D000-memory.dmp

Filesize
9.6MB

Download