umbral | 1c400bc43d208e97292438c4ea59e8203c7fb0e78d44b4af7c2b5af3b71c4a4d

Resubmissions

29/08/2024, 22:54

240829-2v2zksvhrc 10

29/08/2024, 15:11

240829-skqdcszepk 10

Analysis

max time kernel
213s
max time network
279s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
29/08/2024, 15:11

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Umbral.exe
Size

484KB
MD5

76bdc0aa53bd46fd5eb4c4bbba89e865
SHA1

5b65000b2503e75e424d8360a40703fb2ff7aa2f
SHA256

1c400bc43d208e97292438c4ea59e8203c7fb0e78d44b4af7c2b5af3b71c4a4d
SHA512

cc5365a4ba91f3f0dde1177290cce6c538fb75b4dbee53dc74c9870c1c8a4937b44cc1565045497f1a94a6f5bdc127709246a28793c42574fab46b23d4f8f669
SSDEEP

12288:MoZrL+EP8njZwR/k4XVG/BcoNiZI8kYFNLQd2nLyNz67:SI8jZwR/k4XVG/BcoNi55MILyM7

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/232-1-0x000001B4253F0000-0x000001B425470000-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
1404	powershell.exe
768	powershell.exe
4420	powershell.exe
2248	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
1	discord.com
5	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
2	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
2976	cmd.exe
3772	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2536	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3772	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2248	powershell.exe
2248	powershell.exe
1404	powershell.exe
1404	powershell.exe
768	powershell.exe
768	powershell.exe
4124	powershell.exe
4124	powershell.exe
4420	powershell.exe
4420	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	232	Umbral.exe
Token: SeDebugPrivilege	2248	powershell.exe
Token: SeDebugPrivilege	1404	powershell.exe
Token: SeDebugPrivilege	768	powershell.exe
Token: SeDebugPrivilege	4124	powershell.exe
Token: SeIncreaseQuotaPrivilege	3036	wmic.exe
Token: SeSecurityPrivilege	3036	wmic.exe
Token: SeTakeOwnershipPrivilege	3036	wmic.exe
Token: SeLoadDriverPrivilege	3036	wmic.exe
Token: SeSystemProfilePrivilege	3036	wmic.exe
Token: SeSystemtimePrivilege	3036	wmic.exe
Token: SeProfSingleProcessPrivilege	3036	wmic.exe
Token: SeIncBasePriorityPrivilege	3036	wmic.exe
Token: SeCreatePagefilePrivilege	3036	wmic.exe
Token: SeBackupPrivilege	3036	wmic.exe
Token: SeRestorePrivilege	3036	wmic.exe
Token: SeShutdownPrivilege	3036	wmic.exe
Token: SeDebugPrivilege	3036	wmic.exe
Token: SeSystemEnvironmentPrivilege	3036	wmic.exe
Token: SeRemoteShutdownPrivilege	3036	wmic.exe
Token: SeUndockPrivilege	3036	wmic.exe
Token: SeManageVolumePrivilege	3036	wmic.exe
Token: 33	3036	wmic.exe
Token: 34	3036	wmic.exe
Token: 35	3036	wmic.exe
Token: 36	3036	wmic.exe
Token: SeIncreaseQuotaPrivilege	3036	wmic.exe
Token: SeSecurityPrivilege	3036	wmic.exe
Token: SeTakeOwnershipPrivilege	3036	wmic.exe
Token: SeLoadDriverPrivilege	3036	wmic.exe
Token: SeSystemProfilePrivilege	3036	wmic.exe
Token: SeSystemtimePrivilege	3036	wmic.exe
Token: SeProfSingleProcessPrivilege	3036	wmic.exe
Token: SeIncBasePriorityPrivilege	3036	wmic.exe
Token: SeCreatePagefilePrivilege	3036	wmic.exe
Token: SeBackupPrivilege	3036	wmic.exe
Token: SeRestorePrivilege	3036	wmic.exe
Token: SeShutdownPrivilege	3036	wmic.exe
Token: SeDebugPrivilege	3036	wmic.exe
Token: SeSystemEnvironmentPrivilege	3036	wmic.exe
Token: SeRemoteShutdownPrivilege	3036	wmic.exe
Token: SeUndockPrivilege	3036	wmic.exe
Token: SeManageVolumePrivilege	3036	wmic.exe
Token: 33	3036	wmic.exe
Token: 34	3036	wmic.exe
Token: 35	3036	wmic.exe
Token: 36	3036	wmic.exe
Token: SeIncreaseQuotaPrivilege	2824	wmic.exe
Token: SeSecurityPrivilege	2824	wmic.exe
Token: SeTakeOwnershipPrivilege	2824	wmic.exe
Token: SeLoadDriverPrivilege	2824	wmic.exe
Token: SeSystemProfilePrivilege	2824	wmic.exe
Token: SeSystemtimePrivilege	2824	wmic.exe
Token: SeProfSingleProcessPrivilege	2824	wmic.exe
Token: SeIncBasePriorityPrivilege	2824	wmic.exe
Token: SeCreatePagefilePrivilege	2824	wmic.exe
Token: SeBackupPrivilege	2824	wmic.exe
Token: SeRestorePrivilege	2824	wmic.exe
Token: SeShutdownPrivilege	2824	wmic.exe
Token: SeDebugPrivilege	2824	wmic.exe
Token: SeSystemEnvironmentPrivilege	2824	wmic.exe
Token: SeRemoteShutdownPrivilege	2824	wmic.exe
Token: SeUndockPrivilege	2824	wmic.exe
Token: SeManageVolumePrivilege	2824	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 232 wrote to memory of 2940	232	Umbral.exe	79
PID 232 wrote to memory of 2940	232	Umbral.exe	79
PID 232 wrote to memory of 2248	232	Umbral.exe	81
PID 232 wrote to memory of 2248	232	Umbral.exe	81
PID 232 wrote to memory of 1404	232	Umbral.exe	83
PID 232 wrote to memory of 1404	232	Umbral.exe	83
PID 232 wrote to memory of 768	232	Umbral.exe	85
PID 232 wrote to memory of 768	232	Umbral.exe	85
PID 232 wrote to memory of 4124	232	Umbral.exe	87
PID 232 wrote to memory of 4124	232	Umbral.exe	87
PID 232 wrote to memory of 3036	232	Umbral.exe	89
PID 232 wrote to memory of 3036	232	Umbral.exe	89
PID 232 wrote to memory of 2824	232	Umbral.exe	92
PID 232 wrote to memory of 2824	232	Umbral.exe	92
PID 232 wrote to memory of 652	232	Umbral.exe	94
PID 232 wrote to memory of 652	232	Umbral.exe	94
PID 232 wrote to memory of 4420	232	Umbral.exe	96
PID 232 wrote to memory of 4420	232	Umbral.exe	96
PID 232 wrote to memory of 2536	232	Umbral.exe	98
PID 232 wrote to memory of 2536	232	Umbral.exe	98
PID 232 wrote to memory of 2976	232	Umbral.exe	100
PID 232 wrote to memory of 2976	232	Umbral.exe	100
PID 2976 wrote to memory of 3772	2976	cmd.exe	102
PID 2976 wrote to memory of 3772	2976	cmd.exe	102

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2940	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:232
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2940
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2248
- 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:1404
- 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:768
- 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:4124
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2824
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:652
- 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:4420
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2536
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2976
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3772

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
fa21dd50b4e64421076f843031c8ccf7

SHA1
2c56e94f130c0d8d77116e939ffee4e37cf982bd

SHA256
e4f21aca1e12aafa8de7af24b79a75526e902c7d4b3fea5bdb6e723976997be3

SHA512
b8de2bfeb7af06c587dd1f424d410cf83471f31a55a3ea4c4481ce07ffd9bf66ddc1f7775ecd6ac65ac33baaec90ba5a208a9aefc84f31125a50dfb919982687

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

Filesize
1KB

MD5
b2b24ca7620724977dbda92c9d67f03a

SHA1
690c78914829b65044e9912fb47d897ff36fb93c

SHA256
56fdfc125fed54c2b81358537c4b8c373e2058fe4b156de4869aed5532125955

SHA512
bcdbf8b6b094cc610e9286a52d8d42d9526795ba6ad26e1986ac1bd96ef0b6f943b1dc55528c8e40629d29c60fb8123cf6e34ebda2b422df8051faf8e3da2efe

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qxm2qiow.1tp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/232-34-0x000001B427240000-0x000001B42725E000-memory.dmp

Filesize
120KB

Download
memory/232-69-0x000001B43F990000-0x000001B43F9A2000-memory.dmp

Filesize
72KB

Download
memory/232-87-0x00007FF944ED0000-0x00007FF945992000-memory.dmp

Filesize
10.8MB

Download
memory/232-86-0x000001B43FDA0000-0x000001B43FF53000-memory.dmp

Filesize
1.7MB

Download
memory/232-1-0x000001B4253F0000-0x000001B425470000-memory.dmp

Filesize
512KB

Download
memory/232-68-0x000001B427270000-0x000001B42727A000-memory.dmp

Filesize
40KB

Download
memory/232-2-0x00007FF944ED0000-0x00007FF945992000-memory.dmp

Filesize
10.8MB

Download
memory/232-32-0x000001B43FCA0000-0x000001B43FD16000-memory.dmp

Filesize
472KB

Download
memory/232-33-0x000001B43F9E0000-0x000001B43FA30000-memory.dmp

Filesize
320KB

Download
memory/232-0-0x00007FF944ED3000-0x00007FF944ED5000-memory.dmp

Filesize
8KB

Download
memory/2248-11-0x000001F92F750000-0x000001F92F772000-memory.dmp

Filesize
136KB

Download
memory/2248-12-0x00007FF944ED0000-0x00007FF945992000-memory.dmp

Filesize
10.8MB

Download
memory/2248-13-0x00007FF944ED0000-0x00007FF945992000-memory.dmp

Filesize
10.8MB

Download
memory/2248-14-0x00007FF944ED0000-0x00007FF945992000-memory.dmp

Filesize
10.8MB

Download
memory/2248-19-0x00007FF944ED0000-0x00007FF945992000-memory.dmp

Filesize
10.8MB

Download
memory/2248-18-0x00007FF944ED0000-0x00007FF945992000-memory.dmp

Filesize
10.8MB

Download
memory/2248-15-0x00007FF944ED0000-0x00007FF945992000-memory.dmp

Filesize
10.8MB

Download