umbral | 8ae1dd94ce9613b67ea8eb9e4ea1868824b8714bb1b184debd03048f668823dd

Analysis

max time kernel
133s
max time network
151s
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, 15:58

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General

Target
xdark.exe
Size 229KB
Sample240727-tepejswhql
SHA256 8ae1dd94ce9613b67ea8eb9e4ea1868824b8714bb1b184debd03048f668823dd
MD5 4d3247cc8c41f20789fee08c48359cde
SHA1 409a5ccfec9dcc173d79c2f760a389439d024afc
SHA512 65f6cf419a656840825923944cf737accc9f5591266694c94c1ac9477fef4f79a60e967ece7c878b853b63c99ce7662ce808ad58ea49a25b00b8b3cda9f8b22f
SSDEEP 6144:tloZM+rIkd8g+EtXHkv/iD4AO+VQ6YXzQKXap8aLLyuQb8e1mni:voZtL+EP8A3VQ6YXzQFp8aLLyXN
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3412-0-0x000001B6ADF60000-0x000001B6ADFA0000-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
4928	powershell.exe
2360	powershell.exe
5032	powershell.exe
3568	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
26	discord.com
27	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
10	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
1236	cmd.exe
4788	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3320	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4788	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3412	xdark.exe
3568	powershell.exe
3568	powershell.exe
4928	powershell.exe
4928	powershell.exe
2360	powershell.exe
2360	powershell.exe
2960	powershell.exe
2960	powershell.exe
5032	powershell.exe
5032	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3412	xdark.exe
Token: SeIncreaseQuotaPrivilege	312	wmic.exe
Token: SeSecurityPrivilege	312	wmic.exe
Token: SeTakeOwnershipPrivilege	312	wmic.exe
Token: SeLoadDriverPrivilege	312	wmic.exe
Token: SeSystemProfilePrivilege	312	wmic.exe
Token: SeSystemtimePrivilege	312	wmic.exe
Token: SeProfSingleProcessPrivilege	312	wmic.exe
Token: SeIncBasePriorityPrivilege	312	wmic.exe
Token: SeCreatePagefilePrivilege	312	wmic.exe
Token: SeBackupPrivilege	312	wmic.exe
Token: SeRestorePrivilege	312	wmic.exe
Token: SeShutdownPrivilege	312	wmic.exe
Token: SeDebugPrivilege	312	wmic.exe
Token: SeSystemEnvironmentPrivilege	312	wmic.exe
Token: SeRemoteShutdownPrivilege	312	wmic.exe
Token: SeUndockPrivilege	312	wmic.exe
Token: SeManageVolumePrivilege	312	wmic.exe
Token: 33	312	wmic.exe
Token: 34	312	wmic.exe
Token: 35	312	wmic.exe
Token: 36	312	wmic.exe
Token: SeIncreaseQuotaPrivilege	312	wmic.exe
Token: SeSecurityPrivilege	312	wmic.exe
Token: SeTakeOwnershipPrivilege	312	wmic.exe
Token: SeLoadDriverPrivilege	312	wmic.exe
Token: SeSystemProfilePrivilege	312	wmic.exe
Token: SeSystemtimePrivilege	312	wmic.exe
Token: SeProfSingleProcessPrivilege	312	wmic.exe
Token: SeIncBasePriorityPrivilege	312	wmic.exe
Token: SeCreatePagefilePrivilege	312	wmic.exe
Token: SeBackupPrivilege	312	wmic.exe
Token: SeRestorePrivilege	312	wmic.exe
Token: SeShutdownPrivilege	312	wmic.exe
Token: SeDebugPrivilege	312	wmic.exe
Token: SeSystemEnvironmentPrivilege	312	wmic.exe
Token: SeRemoteShutdownPrivilege	312	wmic.exe
Token: SeUndockPrivilege	312	wmic.exe
Token: SeManageVolumePrivilege	312	wmic.exe
Token: 33	312	wmic.exe
Token: 34	312	wmic.exe
Token: 35	312	wmic.exe
Token: 36	312	wmic.exe
Token: SeDebugPrivilege	3568	powershell.exe
Token: SeDebugPrivilege	4928	powershell.exe
Token: SeDebugPrivilege	2360	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeIncreaseQuotaPrivilege	3196	wmic.exe
Token: SeSecurityPrivilege	3196	wmic.exe
Token: SeTakeOwnershipPrivilege	3196	wmic.exe
Token: SeLoadDriverPrivilege	3196	wmic.exe
Token: SeSystemProfilePrivilege	3196	wmic.exe
Token: SeSystemtimePrivilege	3196	wmic.exe
Token: SeProfSingleProcessPrivilege	3196	wmic.exe
Token: SeIncBasePriorityPrivilege	3196	wmic.exe
Token: SeCreatePagefilePrivilege	3196	wmic.exe
Token: SeBackupPrivilege	3196	wmic.exe
Token: SeRestorePrivilege	3196	wmic.exe
Token: SeShutdownPrivilege	3196	wmic.exe
Token: SeDebugPrivilege	3196	wmic.exe
Token: SeSystemEnvironmentPrivilege	3196	wmic.exe
Token: SeRemoteShutdownPrivilege	3196	wmic.exe
Token: SeUndockPrivilege	3196	wmic.exe
Token: SeManageVolumePrivilege	3196	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3412 wrote to memory of 312	3412	xdark.exe	88
PID 3412 wrote to memory of 312	3412	xdark.exe	88
PID 3412 wrote to memory of 4884	3412	xdark.exe	92
PID 3412 wrote to memory of 4884	3412	xdark.exe	92
PID 3412 wrote to memory of 3568	3412	xdark.exe	94
PID 3412 wrote to memory of 3568	3412	xdark.exe	94
PID 3412 wrote to memory of 4928	3412	xdark.exe	96
PID 3412 wrote to memory of 4928	3412	xdark.exe	96
PID 3412 wrote to memory of 2360	3412	xdark.exe	98
PID 3412 wrote to memory of 2360	3412	xdark.exe	98
PID 3412 wrote to memory of 2960	3412	xdark.exe	100
PID 3412 wrote to memory of 2960	3412	xdark.exe	100
PID 3412 wrote to memory of 3196	3412	xdark.exe	105
PID 3412 wrote to memory of 3196	3412	xdark.exe	105
PID 3412 wrote to memory of 4492	3412	xdark.exe	107
PID 3412 wrote to memory of 4492	3412	xdark.exe	107
PID 3412 wrote to memory of 816	3412	xdark.exe	109
PID 3412 wrote to memory of 816	3412	xdark.exe	109
PID 3412 wrote to memory of 5032	3412	xdark.exe	111
PID 3412 wrote to memory of 5032	3412	xdark.exe	111
PID 3412 wrote to memory of 3320	3412	xdark.exe	113
PID 3412 wrote to memory of 3320	3412	xdark.exe	113
PID 3412 wrote to memory of 1236	3412	xdark.exe	118
PID 3412 wrote to memory of 1236	3412	xdark.exe	118
PID 1236 wrote to memory of 4788	1236	cmd.exe	120
PID 1236 wrote to memory of 4788	1236	cmd.exe	120

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4884	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:3412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:312
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\xdark.exe"
  2⤵
  - Views/modifies file attributes
  PID:4884
- 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:3568
- 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:4928
- 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:2360
- 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:2960
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3196
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:816
- 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:5032
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3320
- 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:1236
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4788

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 4394552922777081d43fb523126cf176d5a676602a5435713320942034f6b3cf
MD5 35967cf5ed9a95ec4fe527dd96567a02
SHA1 6a7439c241a30ec540d5d204e02a4cbb2a464737
SHA512 419b3c336a67ef964bc166d1267cea146ed5878f98304d6e39fb9a3c0394d75693810a9ddc101cdda5e3196ad7d603df01a3260705cf9ef7cf8d4b252df01f45
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 64a4bafafc0be421baf492086bf83aeb21a3509d7f3027359a041583a3dd940e
MD5 edf85b8f69da682c105ec0f602c84799
SHA1 0efb133decbec10356d952a19876141bd25b03c9
SHA512 d18460006d8192ea69893b66e48f1bcc6c162bba6ed3a5259a6bc2b516ca0978ad53da071d6e390c1153c9a0e62fd7edd288505346efcfe8e9c63a04e7102614
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 a28890c82033d3deaf5770ecd1b0239c77321acc93704b1d4b1e167b91e30aeb
MD5 b0a78e60bfb279d18fd3d6e7a67411f5
SHA1 9344fe3654a14bc66afb9dc6ea215fabfbe5c906
SHA512 9548be23bec645cd705482f78d43b63659e38cf879c34f7071f42fd86ee02039379a5e92fbe0f1c74c12aaebabdd8002f57eba111d3e855cbd0c89a110e346f2
MD5 SHA1 SHA512

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 2c51ebcc061eb2c5ac2400aebda8359e05db51ef434dd665f5ac08418463f573
MD5 ee8d073cdd8102a80c44488493c923f4
SHA1 a62b0420867f69058cc8825f9367495600f73478
SHA512 617ae082d9e4f2e6504bca93d6f48502f3e3e649ca9db421da28776f6f5adfa51746bc1be444be7e98ff1e80f61ceefca18a9ac5be34a7ea09f8cf5a81ad6512
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_vnimdjek.b1g.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vnimdjek.b1g.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/3412-69-0x000001B6C84B0000-0x000001B6C85B2000-memory.dmp

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memory/3412-35-0x000001B6C8720000-0x000001B6C873E000-memory.dmp

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memory/3412-93-0x00007FF9EB9D0000-0x00007FF9EC491000-memory.dmp

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memory/3412-92-0x000001B6C84B0000-0x000001B6C85B2000-memory.dmp

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memory/3412-2-0x00007FF9EB9D0000-0x00007FF9EC491000-memory.dmp

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memory/3412-33-0x000001B6C87A0000-0x000001B6C8816000-memory.dmp

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memory/3412-34-0x000001B6C8820000-0x000001B6C8870000-memory.dmp

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memory/3412-73-0x000001B6C8980000-0x000001B6C8992000-memory.dmp

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memory/3412-1-0x00007FF9EB9D3000-0x00007FF9EB9D5000-memory.dmp

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memory/3412-0-0x000001B6ADF60000-0x000001B6ADFA0000-memory.dmp

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memory/3412-72-0x000001B6C8760000-0x000001B6C876A000-memory.dmp

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memory/3568-4-0x00007FF9EB9D0000-0x00007FF9EC491000-memory.dmp

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memory/3568-11-0x000001DC297F0000-0x000001DC29812000-memory.dmp

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memory/3568-5-0x00007FF9EB9D0000-0x00007FF9EC491000-memory.dmp

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memory/3568-3-0x00007FF9EB9D0000-0x00007FF9EC491000-memory.dmp

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memory/3568-18-0x00007FF9EB9D0000-0x00007FF9EC491000-memory.dmp

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