umbral | 8ae1dd94ce9613b67ea8eb9e4ea1868824b8714bb1b184debd03048f668823dd

Analysis

max time kernel
120s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
27-07-2024 12:57

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General

Target

xdark.exe
Size

229KB
MD5

4d3247cc8c41f20789fee08c48359cde
SHA1

409a5ccfec9dcc173d79c2f760a389439d024afc
SHA256

8ae1dd94ce9613b67ea8eb9e4ea1868824b8714bb1b184debd03048f668823dd
SHA512

65f6cf419a656840825923944cf737accc9f5591266694c94c1ac9477fef4f79a60e967ece7c878b853b63c99ce7662ce808ad58ea49a25b00b8b3cda9f8b22f
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD4AO+VQ6YXzQKXap8aLLyuQb8e1mni:voZtL+EP8A3VQ6YXzQFp8aLLyXN

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2712-1-0x0000012306240000-0x0000012306280000-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
4712	powershell.exe
4476	powershell.exe
3616	powershell.exe
2448	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	xdark.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
28	discord.com
29	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
14	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
1220	cmd.exe
4948	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5024	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4948	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2712	xdark.exe
4712	powershell.exe
4712	powershell.exe
3616	powershell.exe
3616	powershell.exe
2448	powershell.exe
2448	powershell.exe
2744	powershell.exe
2744	powershell.exe
4476	powershell.exe
4476	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2712	xdark.exe
Token: SeIncreaseQuotaPrivilege	3040	wmic.exe
Token: SeSecurityPrivilege	3040	wmic.exe
Token: SeTakeOwnershipPrivilege	3040	wmic.exe
Token: SeLoadDriverPrivilege	3040	wmic.exe
Token: SeSystemProfilePrivilege	3040	wmic.exe
Token: SeSystemtimePrivilege	3040	wmic.exe
Token: SeProfSingleProcessPrivilege	3040	wmic.exe
Token: SeIncBasePriorityPrivilege	3040	wmic.exe
Token: SeCreatePagefilePrivilege	3040	wmic.exe
Token: SeBackupPrivilege	3040	wmic.exe
Token: SeRestorePrivilege	3040	wmic.exe
Token: SeShutdownPrivilege	3040	wmic.exe
Token: SeDebugPrivilege	3040	wmic.exe
Token: SeSystemEnvironmentPrivilege	3040	wmic.exe
Token: SeRemoteShutdownPrivilege	3040	wmic.exe
Token: SeUndockPrivilege	3040	wmic.exe
Token: SeManageVolumePrivilege	3040	wmic.exe
Token: 33	3040	wmic.exe
Token: 34	3040	wmic.exe
Token: 35	3040	wmic.exe
Token: 36	3040	wmic.exe
Token: SeIncreaseQuotaPrivilege	3040	wmic.exe
Token: SeSecurityPrivilege	3040	wmic.exe
Token: SeTakeOwnershipPrivilege	3040	wmic.exe
Token: SeLoadDriverPrivilege	3040	wmic.exe
Token: SeSystemProfilePrivilege	3040	wmic.exe
Token: SeSystemtimePrivilege	3040	wmic.exe
Token: SeProfSingleProcessPrivilege	3040	wmic.exe
Token: SeIncBasePriorityPrivilege	3040	wmic.exe
Token: SeCreatePagefilePrivilege	3040	wmic.exe
Token: SeBackupPrivilege	3040	wmic.exe
Token: SeRestorePrivilege	3040	wmic.exe
Token: SeShutdownPrivilege	3040	wmic.exe
Token: SeDebugPrivilege	3040	wmic.exe
Token: SeSystemEnvironmentPrivilege	3040	wmic.exe
Token: SeRemoteShutdownPrivilege	3040	wmic.exe
Token: SeUndockPrivilege	3040	wmic.exe
Token: SeManageVolumePrivilege	3040	wmic.exe
Token: 33	3040	wmic.exe
Token: 34	3040	wmic.exe
Token: 35	3040	wmic.exe
Token: 36	3040	wmic.exe
Token: SeDebugPrivilege	4712	powershell.exe
Token: SeDebugPrivilege	3616	powershell.exe
Token: SeDebugPrivilege	2448	powershell.exe
Token: SeDebugPrivilege	2744	powershell.exe
Token: SeIncreaseQuotaPrivilege	4960	wmic.exe
Token: SeSecurityPrivilege	4960	wmic.exe
Token: SeTakeOwnershipPrivilege	4960	wmic.exe
Token: SeLoadDriverPrivilege	4960	wmic.exe
Token: SeSystemProfilePrivilege	4960	wmic.exe
Token: SeSystemtimePrivilege	4960	wmic.exe
Token: SeProfSingleProcessPrivilege	4960	wmic.exe
Token: SeIncBasePriorityPrivilege	4960	wmic.exe
Token: SeCreatePagefilePrivilege	4960	wmic.exe
Token: SeBackupPrivilege	4960	wmic.exe
Token: SeRestorePrivilege	4960	wmic.exe
Token: SeShutdownPrivilege	4960	wmic.exe
Token: SeDebugPrivilege	4960	wmic.exe
Token: SeSystemEnvironmentPrivilege	4960	wmic.exe
Token: SeRemoteShutdownPrivilege	4960	wmic.exe
Token: SeUndockPrivilege	4960	wmic.exe
Token: SeManageVolumePrivilege	4960	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2712 wrote to memory of 3040	2712	xdark.exe	87
PID 2712 wrote to memory of 3040	2712	xdark.exe	87
PID 2712 wrote to memory of 4584	2712	xdark.exe	90
PID 2712 wrote to memory of 4584	2712	xdark.exe	90
PID 2712 wrote to memory of 4712	2712	xdark.exe	92
PID 2712 wrote to memory of 4712	2712	xdark.exe	92
PID 2712 wrote to memory of 3616	2712	xdark.exe	94
PID 2712 wrote to memory of 3616	2712	xdark.exe	94
PID 2712 wrote to memory of 2448	2712	xdark.exe	98
PID 2712 wrote to memory of 2448	2712	xdark.exe	98
PID 2712 wrote to memory of 2744	2712	xdark.exe	101
PID 2712 wrote to memory of 2744	2712	xdark.exe	101
PID 2712 wrote to memory of 4960	2712	xdark.exe	104
PID 2712 wrote to memory of 4960	2712	xdark.exe	104
PID 2712 wrote to memory of 4528	2712	xdark.exe	106
PID 2712 wrote to memory of 4528	2712	xdark.exe	106
PID 2712 wrote to memory of 4572	2712	xdark.exe	108
PID 2712 wrote to memory of 4572	2712	xdark.exe	108
PID 2712 wrote to memory of 4476	2712	xdark.exe	110
PID 2712 wrote to memory of 4476	2712	xdark.exe	110
PID 2712 wrote to memory of 5024	2712	xdark.exe	113
PID 2712 wrote to memory of 5024	2712	xdark.exe	113
PID 2712 wrote to memory of 1220	2712	xdark.exe	116
PID 2712 wrote to memory of 1220	2712	xdark.exe	116
PID 1220 wrote to memory of 4948	1220	cmd.exe	118
PID 1220 wrote to memory of 4948	1220	cmd.exe	118

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4584	attrib.exe

C:\Users\Admin\AppData\Local\Temp\xdark.exe
"C:\Users\Admin\AppData\Local\Temp\xdark.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2712
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3040
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\xdark.exe"
  2⤵
  - Views/modifies file attributes
  PID:4584
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\xdark.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4712
- 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:3616
- 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:2448
- 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:2744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4960
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4528
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4572
- 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:4476
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5024
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\xdark.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1220
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4948

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
bd5940f08d0be56e65e5f2aaf47c538e

SHA1
d7e31b87866e5e383ab5499da64aba50f03e8443

SHA256
2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

SHA512
c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

Filesize
948B

MD5
5824a6037c081fda5d46de274b6e2799

SHA1
526367a09300cbde430e8fb44e41cbe7a0937aac

SHA256
4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f

SHA512
a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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

Filesize
1KB

MD5
71418d0b9965891dd306df50dd80a200

SHA1
a0df11b105d282fdce36532bc9edb82a410ac070

SHA256
2c63e7f45102284aaf6f22dfbccf6055a9de6b9163b1589ac766be7b2f8fbb52

SHA512
e399b8c48ba33ba7417f7be56eab4489a32f5f39d7fc580a7e01b50ab6565476dac55b769926f36148664ea377b4622b9d537e08d8964fa6b870b2facae0d2bd

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

Filesize
1KB

MD5
8c20cb69ff3eb935626ecadbf0d9fe43

SHA1
2f1c743328d84b35bd90b0efdb4984ea61a7b2fb

SHA256
048e350526280570940e0067f9d63de2cc7b46c2e1b973550c19283a5d172851

SHA512
0b7bbce7975405127e9663ff1d7c59c9c60da342e7a16e76dada15b5ef0682638d493c4b8781d16f913281a7b36dcd1717a90bda2244f49161c7d53179efc95f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4veyb02l.ja2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2712-71-0x00000123206E0000-0x00000123206EA000-memory.dmp

Filesize
40KB

Download
memory/2712-35-0x0000012306840000-0x000001230685E000-memory.dmp

Filesize
120KB

Download
memory/2712-90-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

Filesize
10.8MB

Download
memory/2712-72-0x0000012320770000-0x0000012320782000-memory.dmp

Filesize
72KB

Download
memory/2712-2-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

Filesize
10.8MB

Download
memory/2712-33-0x00000123209F0000-0x0000012320A66000-memory.dmp

Filesize
472KB

Download
memory/2712-34-0x0000012320720000-0x0000012320770000-memory.dmp

Filesize
320KB

Download
memory/2712-0-0x00007FFD60A43000-0x00007FFD60A45000-memory.dmp

Filesize
8KB

Download
memory/2712-1-0x0000012306240000-0x0000012306280000-memory.dmp

Filesize
256KB

Download
memory/4712-15-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

Filesize
10.8MB

Download
memory/4712-14-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

Filesize
10.8MB

Download
memory/4712-3-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

Filesize
10.8MB

Download
memory/4712-11-0x000002E071210000-0x000002E071232000-memory.dmp

Filesize
136KB

Download
memory/4712-18-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

Filesize
10.8MB

Download