umbral | 18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922

Analysis

max time kernel
31s
max time network
39s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-09-2024 01:41

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Reason

Machine shutdown

Report Analysis Logs

General

Target

Umbral.exe
Size

231KB
MD5

2e5358fcd0403cf1c6dd36a32952d9ea
SHA1

cb03dcf965d79b39657643469b6bbdec205c0a22
SHA256

18448b3f95efc450d3183f547c3b3f74d645911e3e198895a429d1cd02080922
SHA512

0bc336ebad20497f6d8a89db417106ae0f306bd34588e1118b6d82b1da63890ab7ef35b646d259ac78d7c92bc3fcf87d96596f9c61de31910c7d2c4a3ebfaaac
SSDEEP

6144:xloZMarIkd8g+EtXHkv/iD4kNJe5nsAvEOXZkQlzIb8e1m2P7Ai:DoZhL+EP8kNJe5nsAvEOXZkQlE57Z

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1824-1-0x000002A0CFB60000-0x000002A0CFBA0000-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
1628	powershell.exe
1920	powershell.exe
1940	powershell.exe
816	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
21	discord.com
22	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
3340	cmd.exe
3012	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5088	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3012	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1824	Umbral.exe
1628	powershell.exe
1628	powershell.exe
1920	powershell.exe
1920	powershell.exe
1940	powershell.exe
1940	powershell.exe
5040	powershell.exe
5040	powershell.exe
816	powershell.exe
816	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1824	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2580	wmic.exe
Token: SeSecurityPrivilege	2580	wmic.exe
Token: SeTakeOwnershipPrivilege	2580	wmic.exe
Token: SeLoadDriverPrivilege	2580	wmic.exe
Token: SeSystemProfilePrivilege	2580	wmic.exe
Token: SeSystemtimePrivilege	2580	wmic.exe
Token: SeProfSingleProcessPrivilege	2580	wmic.exe
Token: SeIncBasePriorityPrivilege	2580	wmic.exe
Token: SeCreatePagefilePrivilege	2580	wmic.exe
Token: SeBackupPrivilege	2580	wmic.exe
Token: SeRestorePrivilege	2580	wmic.exe
Token: SeShutdownPrivilege	2580	wmic.exe
Token: SeDebugPrivilege	2580	wmic.exe
Token: SeSystemEnvironmentPrivilege	2580	wmic.exe
Token: SeRemoteShutdownPrivilege	2580	wmic.exe
Token: SeUndockPrivilege	2580	wmic.exe
Token: SeManageVolumePrivilege	2580	wmic.exe
Token: 33	2580	wmic.exe
Token: 34	2580	wmic.exe
Token: 35	2580	wmic.exe
Token: 36	2580	wmic.exe
Token: SeIncreaseQuotaPrivilege	2580	wmic.exe
Token: SeSecurityPrivilege	2580	wmic.exe
Token: SeTakeOwnershipPrivilege	2580	wmic.exe
Token: SeLoadDriverPrivilege	2580	wmic.exe
Token: SeSystemProfilePrivilege	2580	wmic.exe
Token: SeSystemtimePrivilege	2580	wmic.exe
Token: SeProfSingleProcessPrivilege	2580	wmic.exe
Token: SeIncBasePriorityPrivilege	2580	wmic.exe
Token: SeCreatePagefilePrivilege	2580	wmic.exe
Token: SeBackupPrivilege	2580	wmic.exe
Token: SeRestorePrivilege	2580	wmic.exe
Token: SeShutdownPrivilege	2580	wmic.exe
Token: SeDebugPrivilege	2580	wmic.exe
Token: SeSystemEnvironmentPrivilege	2580	wmic.exe
Token: SeRemoteShutdownPrivilege	2580	wmic.exe
Token: SeUndockPrivilege	2580	wmic.exe
Token: SeManageVolumePrivilege	2580	wmic.exe
Token: 33	2580	wmic.exe
Token: 34	2580	wmic.exe
Token: 35	2580	wmic.exe
Token: 36	2580	wmic.exe
Token: SeDebugPrivilege	1628	powershell.exe
Token: SeDebugPrivilege	1920	powershell.exe
Token: SeDebugPrivilege	1940	powershell.exe
Token: SeDebugPrivilege	5040	powershell.exe
Token: SeIncreaseQuotaPrivilege	3440	wmic.exe
Token: SeSecurityPrivilege	3440	wmic.exe
Token: SeTakeOwnershipPrivilege	3440	wmic.exe
Token: SeLoadDriverPrivilege	3440	wmic.exe
Token: SeSystemProfilePrivilege	3440	wmic.exe
Token: SeSystemtimePrivilege	3440	wmic.exe
Token: SeProfSingleProcessPrivilege	3440	wmic.exe
Token: SeIncBasePriorityPrivilege	3440	wmic.exe
Token: SeCreatePagefilePrivilege	3440	wmic.exe
Token: SeBackupPrivilege	3440	wmic.exe
Token: SeRestorePrivilege	3440	wmic.exe
Token: SeShutdownPrivilege	3440	wmic.exe
Token: SeDebugPrivilege	3440	wmic.exe
Token: SeSystemEnvironmentPrivilege	3440	wmic.exe
Token: SeRemoteShutdownPrivilege	3440	wmic.exe
Token: SeUndockPrivilege	3440	wmic.exe
Token: SeManageVolumePrivilege	3440	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1824 wrote to memory of 2580	1824	Umbral.exe	84
PID 1824 wrote to memory of 2580	1824	Umbral.exe	84
PID 1824 wrote to memory of 4820	1824	Umbral.exe	89
PID 1824 wrote to memory of 4820	1824	Umbral.exe	89
PID 1824 wrote to memory of 1628	1824	Umbral.exe	91
PID 1824 wrote to memory of 1628	1824	Umbral.exe	91
PID 1824 wrote to memory of 1920	1824	Umbral.exe	94
PID 1824 wrote to memory of 1920	1824	Umbral.exe	94
PID 1824 wrote to memory of 1940	1824	Umbral.exe	96
PID 1824 wrote to memory of 1940	1824	Umbral.exe	96
PID 1824 wrote to memory of 5040	1824	Umbral.exe	98
PID 1824 wrote to memory of 5040	1824	Umbral.exe	98
PID 1824 wrote to memory of 3440	1824	Umbral.exe	102
PID 1824 wrote to memory of 3440	1824	Umbral.exe	102
PID 1824 wrote to memory of 4132	1824	Umbral.exe	104
PID 1824 wrote to memory of 4132	1824	Umbral.exe	104
PID 1824 wrote to memory of 4300	1824	Umbral.exe	106
PID 1824 wrote to memory of 4300	1824	Umbral.exe	106
PID 1824 wrote to memory of 816	1824	Umbral.exe	108
PID 1824 wrote to memory of 816	1824	Umbral.exe	108
PID 1824 wrote to memory of 5088	1824	Umbral.exe	111
PID 1824 wrote to memory of 5088	1824	Umbral.exe	111
PID 1824 wrote to memory of 3340	1824	Umbral.exe	113
PID 1824 wrote to memory of 3340	1824	Umbral.exe	113
PID 3340 wrote to memory of 3012	3340	cmd.exe	115
PID 3340 wrote to memory of 3012	3340	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4820	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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1824
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2580
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:4820
- 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:1628
- 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:1920
- 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:1940
- 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:5040
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3440
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4132
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4300
- 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:816
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5088
- 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:3340
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3012

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
28ef595a6cc9f47b8eccb22d4ed50d6c

SHA1
4335de707324b15eba79017938c3da2752d3eea5

SHA256
3abd14d4fe7b5697b2fa84993e7183f4fd2580be5b4e5150da15ddda5a9560b9

SHA512
687b7849faa62a4dabc240b573afa163f0cda9a80be61cebe28ef1461777744d73b465ac92d065093228068540846e79c899445057f5b906f9b9fa9868132208

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
eeb6ad386d143f278077171fc01a81e8

SHA1
43cff1bd7240965bfb2f10e47c0cec0f94332e2d

SHA256
59d62f9472b4c00b7cae0ee702789fa2b0042c468e4de9421d2430f9973eb00d

SHA512
b40f003e6d97adaaf05809f06d12df01984943d9eb6c44eaeffef90df8de0040373150c9714b11a42db5189b7064eeed0609a39f6f1feb91b05dd1835333e8f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xyrumxv1.hjq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1628-4-0x0000028CD0B60000-0x0000028CD0B82000-memory.dmp

Filesize
136KB

Download
memory/1628-5-0x00007FFABBF30000-0x00007FFABC9F1000-memory.dmp

Filesize
10.8MB

Download
memory/1628-15-0x00007FFABBF30000-0x00007FFABC9F1000-memory.dmp

Filesize
10.8MB

Download
memory/1628-18-0x00007FFABBF30000-0x00007FFABC9F1000-memory.dmp

Filesize
10.8MB

Download
memory/1628-3-0x00007FFABBF30000-0x00007FFABC9F1000-memory.dmp

Filesize
10.8MB

Download
memory/1824-34-0x000002A0D1800000-0x000002A0D1850000-memory.dmp

Filesize
320KB

Download
memory/1824-33-0x000002A0EA090000-0x000002A0EA106000-memory.dmp

Filesize
472KB

Download
memory/1824-35-0x000002A0D19A0000-0x000002A0D19BE000-memory.dmp

Filesize
120KB

Download
memory/1824-1-0x000002A0CFB60000-0x000002A0CFBA0000-memory.dmp

Filesize
256KB

Download
memory/1824-0-0x00007FFABBF33000-0x00007FFABBF35000-memory.dmp

Filesize
8KB

Download
memory/1824-71-0x000002A0EA130000-0x000002A0EA142000-memory.dmp

Filesize
72KB

Download
memory/1824-70-0x000002A0D1990000-0x000002A0D199A000-memory.dmp

Filesize
40KB

Download
memory/1824-2-0x00007FFABBF30000-0x00007FFABC9F1000-memory.dmp

Filesize
10.8MB

Download
memory/1824-87-0x00007FFABBF30000-0x00007FFABC9F1000-memory.dmp

Filesize
10.8MB

Download