umbral | 6b3fb6fce70e0a6cbe4dec6627f76ff70414048360f03c7d72099fbd059591ed

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-09-2024 00:47

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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/340-1-0x00000000012D0000-0x0000000001310000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3044	powershell.exe
2792	powershell.exe
2348	powershell.exe
1096	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
2712	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
2712	cmd.exe
1268	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2084	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1268	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
340	Emerald.exe
1096	powershell.exe
3044	powershell.exe
2792	powershell.exe
1300	powershell.exe
2348	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	340	Emerald.exe
Token: SeIncreaseQuotaPrivilege	1484	wmic.exe
Token: SeSecurityPrivilege	1484	wmic.exe
Token: SeTakeOwnershipPrivilege	1484	wmic.exe
Token: SeLoadDriverPrivilege	1484	wmic.exe
Token: SeSystemProfilePrivilege	1484	wmic.exe
Token: SeSystemtimePrivilege	1484	wmic.exe
Token: SeProfSingleProcessPrivilege	1484	wmic.exe
Token: SeIncBasePriorityPrivilege	1484	wmic.exe
Token: SeCreatePagefilePrivilege	1484	wmic.exe
Token: SeBackupPrivilege	1484	wmic.exe
Token: SeRestorePrivilege	1484	wmic.exe
Token: SeShutdownPrivilege	1484	wmic.exe
Token: SeDebugPrivilege	1484	wmic.exe
Token: SeSystemEnvironmentPrivilege	1484	wmic.exe
Token: SeRemoteShutdownPrivilege	1484	wmic.exe
Token: SeUndockPrivilege	1484	wmic.exe
Token: SeManageVolumePrivilege	1484	wmic.exe
Token: 33	1484	wmic.exe
Token: 34	1484	wmic.exe
Token: 35	1484	wmic.exe
Token: SeIncreaseQuotaPrivilege	1484	wmic.exe
Token: SeSecurityPrivilege	1484	wmic.exe
Token: SeTakeOwnershipPrivilege	1484	wmic.exe
Token: SeLoadDriverPrivilege	1484	wmic.exe
Token: SeSystemProfilePrivilege	1484	wmic.exe
Token: SeSystemtimePrivilege	1484	wmic.exe
Token: SeProfSingleProcessPrivilege	1484	wmic.exe
Token: SeIncBasePriorityPrivilege	1484	wmic.exe
Token: SeCreatePagefilePrivilege	1484	wmic.exe
Token: SeBackupPrivilege	1484	wmic.exe
Token: SeRestorePrivilege	1484	wmic.exe
Token: SeShutdownPrivilege	1484	wmic.exe
Token: SeDebugPrivilege	1484	wmic.exe
Token: SeSystemEnvironmentPrivilege	1484	wmic.exe
Token: SeRemoteShutdownPrivilege	1484	wmic.exe
Token: SeUndockPrivilege	1484	wmic.exe
Token: SeManageVolumePrivilege	1484	wmic.exe
Token: 33	1484	wmic.exe
Token: 34	1484	wmic.exe
Token: 35	1484	wmic.exe
Token: SeDebugPrivilege	1096	powershell.exe
Token: SeDebugPrivilege	3044	powershell.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeDebugPrivilege	1300	powershell.exe
Token: SeIncreaseQuotaPrivilege	3004	wmic.exe
Token: SeSecurityPrivilege	3004	wmic.exe
Token: SeTakeOwnershipPrivilege	3004	wmic.exe
Token: SeLoadDriverPrivilege	3004	wmic.exe
Token: SeSystemProfilePrivilege	3004	wmic.exe
Token: SeSystemtimePrivilege	3004	wmic.exe
Token: SeProfSingleProcessPrivilege	3004	wmic.exe
Token: SeIncBasePriorityPrivilege	3004	wmic.exe
Token: SeCreatePagefilePrivilege	3004	wmic.exe
Token: SeBackupPrivilege	3004	wmic.exe
Token: SeRestorePrivilege	3004	wmic.exe
Token: SeShutdownPrivilege	3004	wmic.exe
Token: SeDebugPrivilege	3004	wmic.exe
Token: SeSystemEnvironmentPrivilege	3004	wmic.exe
Token: SeRemoteShutdownPrivilege	3004	wmic.exe
Token: SeUndockPrivilege	3004	wmic.exe
Token: SeManageVolumePrivilege	3004	wmic.exe
Token: 33	3004	wmic.exe
Token: 34	3004	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 340 wrote to memory of 1484	340	Emerald.exe	30
PID 340 wrote to memory of 1484	340	Emerald.exe	30
PID 340 wrote to memory of 1484	340	Emerald.exe	30
PID 340 wrote to memory of 2760	340	Emerald.exe	33
PID 340 wrote to memory of 2760	340	Emerald.exe	33
PID 340 wrote to memory of 2760	340	Emerald.exe	33
PID 340 wrote to memory of 1096	340	Emerald.exe	35
PID 340 wrote to memory of 1096	340	Emerald.exe	35
PID 340 wrote to memory of 1096	340	Emerald.exe	35
PID 340 wrote to memory of 3044	340	Emerald.exe	37
PID 340 wrote to memory of 3044	340	Emerald.exe	37
PID 340 wrote to memory of 3044	340	Emerald.exe	37
PID 340 wrote to memory of 2792	340	Emerald.exe	39
PID 340 wrote to memory of 2792	340	Emerald.exe	39
PID 340 wrote to memory of 2792	340	Emerald.exe	39
PID 340 wrote to memory of 1300	340	Emerald.exe	42
PID 340 wrote to memory of 1300	340	Emerald.exe	42
PID 340 wrote to memory of 1300	340	Emerald.exe	42
PID 340 wrote to memory of 3004	340	Emerald.exe	44
PID 340 wrote to memory of 3004	340	Emerald.exe	44
PID 340 wrote to memory of 3004	340	Emerald.exe	44
PID 340 wrote to memory of 2604	340	Emerald.exe	46
PID 340 wrote to memory of 2604	340	Emerald.exe	46
PID 340 wrote to memory of 2604	340	Emerald.exe	46
PID 340 wrote to memory of 1468	340	Emerald.exe	48
PID 340 wrote to memory of 1468	340	Emerald.exe	48
PID 340 wrote to memory of 1468	340	Emerald.exe	48
PID 340 wrote to memory of 2348	340	Emerald.exe	50
PID 340 wrote to memory of 2348	340	Emerald.exe	50
PID 340 wrote to memory of 2348	340	Emerald.exe	50
PID 340 wrote to memory of 2084	340	Emerald.exe	52
PID 340 wrote to memory of 2084	340	Emerald.exe	52
PID 340 wrote to memory of 2084	340	Emerald.exe	52
PID 340 wrote to memory of 2712	340	Emerald.exe	54
PID 340 wrote to memory of 2712	340	Emerald.exe	54
PID 340 wrote to memory of 2712	340	Emerald.exe	54
PID 2712 wrote to memory of 1268	2712	cmd.exe	56
PID 2712 wrote to memory of 1268	2712	cmd.exe	56
PID 2712 wrote to memory of 1268	2712	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2760	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:340
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1484
- 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:2760
- 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:1096
- 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:3044
- 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:2792
- 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:1300
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3004
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2604
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1468
- 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:2348
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2084
- 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:2712
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1268

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
5ec73777fcd947c0b470f1112e490d35

SHA1
0715ccf304c8d12fc88ff92e47205772f3dc3a64

SHA256
b55a4253280b0623349951f860e4ae057a7cf45f16892d4ed6bd7e04f0f5c0db

SHA512
ea51da8a7f7908d93049fa90bafd816de48a56df0bde8a40e2b7a61c59bb92341642f03700275e34efc71c5746770182a50b48c29fcb5dc9a011d96d3faadb0c

Download Submit
memory/340-0-0x000007FEF57C3000-0x000007FEF57C4000-memory.dmp

Filesize
4KB

Download
memory/340-1-0x00000000012D0000-0x0000000001310000-memory.dmp

Filesize
256KB

Download
memory/340-2-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/340-47-0x000007FEF57C0000-0x000007FEF61AC000-memory.dmp

Filesize
9.9MB

Download
memory/1096-7-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/1096-8-0x0000000001F80000-0x0000000001F88000-memory.dmp

Filesize
32KB

Download
memory/2348-43-0x00000000005F0000-0x00000000005F8000-memory.dmp

Filesize
32KB

Download
memory/3044-14-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/3044-15-0x00000000027A0000-0x00000000027A8000-memory.dmp

Filesize
32KB

Download