umbral | a0b244e1ee7d95f564857f7e481620731d347e5934f4bcc6098a76eb1b71a499

Analysis

max time kernel
136s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
24-08-2024 14:25

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General

Target

Umbral.exe
Size

416KB
MD5

bc5dd701f57c7d57c143f1cfd0bb2e0c
SHA1

bd5cac1520ccb83442a96ac34cfccf2730591720
SHA256

a0b244e1ee7d95f564857f7e481620731d347e5934f4bcc6098a76eb1b71a499
SHA512

dca39c9fab005131247cbddbdf3a6a77eeaa9cf3f4c09a9cd3bf2641add1818092e314c9225060b809a45fb1c66db0de2a7d64dfaaeb3b2f73767faab4e897a2
SSDEEP

12288:5oZtL+EP8HE3APlO2Z6c1niinSFDA2oCMt/YdD:XI8k3APlO2Z6c1niinSJ6/W

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3708-1-0x0000025A67370000-0x0000025A673DE000-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
844	powershell.exe
3232	powershell.exe
2996	powershell.exe
5076	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
30	discord.com
31	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
5	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
3264	cmd.exe
1844	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4084	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1844	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3708	Umbral.exe
5076	powershell.exe
5076	powershell.exe
844	powershell.exe
844	powershell.exe
3232	powershell.exe
3232	powershell.exe
3876	powershell.exe
3876	powershell.exe
2996	powershell.exe
2996	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3708	Umbral.exe
Token: SeIncreaseQuotaPrivilege	1840	wmic.exe
Token: SeSecurityPrivilege	1840	wmic.exe
Token: SeTakeOwnershipPrivilege	1840	wmic.exe
Token: SeLoadDriverPrivilege	1840	wmic.exe
Token: SeSystemProfilePrivilege	1840	wmic.exe
Token: SeSystemtimePrivilege	1840	wmic.exe
Token: SeProfSingleProcessPrivilege	1840	wmic.exe
Token: SeIncBasePriorityPrivilege	1840	wmic.exe
Token: SeCreatePagefilePrivilege	1840	wmic.exe
Token: SeBackupPrivilege	1840	wmic.exe
Token: SeRestorePrivilege	1840	wmic.exe
Token: SeShutdownPrivilege	1840	wmic.exe
Token: SeDebugPrivilege	1840	wmic.exe
Token: SeSystemEnvironmentPrivilege	1840	wmic.exe
Token: SeRemoteShutdownPrivilege	1840	wmic.exe
Token: SeUndockPrivilege	1840	wmic.exe
Token: SeManageVolumePrivilege	1840	wmic.exe
Token: 33	1840	wmic.exe
Token: 34	1840	wmic.exe
Token: 35	1840	wmic.exe
Token: 36	1840	wmic.exe
Token: SeIncreaseQuotaPrivilege	1840	wmic.exe
Token: SeSecurityPrivilege	1840	wmic.exe
Token: SeTakeOwnershipPrivilege	1840	wmic.exe
Token: SeLoadDriverPrivilege	1840	wmic.exe
Token: SeSystemProfilePrivilege	1840	wmic.exe
Token: SeSystemtimePrivilege	1840	wmic.exe
Token: SeProfSingleProcessPrivilege	1840	wmic.exe
Token: SeIncBasePriorityPrivilege	1840	wmic.exe
Token: SeCreatePagefilePrivilege	1840	wmic.exe
Token: SeBackupPrivilege	1840	wmic.exe
Token: SeRestorePrivilege	1840	wmic.exe
Token: SeShutdownPrivilege	1840	wmic.exe
Token: SeDebugPrivilege	1840	wmic.exe
Token: SeSystemEnvironmentPrivilege	1840	wmic.exe
Token: SeRemoteShutdownPrivilege	1840	wmic.exe
Token: SeUndockPrivilege	1840	wmic.exe
Token: SeManageVolumePrivilege	1840	wmic.exe
Token: 33	1840	wmic.exe
Token: 34	1840	wmic.exe
Token: 35	1840	wmic.exe
Token: 36	1840	wmic.exe
Token: SeDebugPrivilege	5076	powershell.exe
Token: SeDebugPrivilege	844	powershell.exe
Token: SeDebugPrivilege	3232	powershell.exe
Token: SeDebugPrivilege	3876	powershell.exe
Token: SeIncreaseQuotaPrivilege	3552	wmic.exe
Token: SeSecurityPrivilege	3552	wmic.exe
Token: SeTakeOwnershipPrivilege	3552	wmic.exe
Token: SeLoadDriverPrivilege	3552	wmic.exe
Token: SeSystemProfilePrivilege	3552	wmic.exe
Token: SeSystemtimePrivilege	3552	wmic.exe
Token: SeProfSingleProcessPrivilege	3552	wmic.exe
Token: SeIncBasePriorityPrivilege	3552	wmic.exe
Token: SeCreatePagefilePrivilege	3552	wmic.exe
Token: SeBackupPrivilege	3552	wmic.exe
Token: SeRestorePrivilege	3552	wmic.exe
Token: SeShutdownPrivilege	3552	wmic.exe
Token: SeDebugPrivilege	3552	wmic.exe
Token: SeSystemEnvironmentPrivilege	3552	wmic.exe
Token: SeRemoteShutdownPrivilege	3552	wmic.exe
Token: SeUndockPrivilege	3552	wmic.exe
Token: SeManageVolumePrivilege	3552	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3708 wrote to memory of 1840	3708	Umbral.exe	85
PID 3708 wrote to memory of 1840	3708	Umbral.exe	85
PID 3708 wrote to memory of 1664	3708	Umbral.exe	90
PID 3708 wrote to memory of 1664	3708	Umbral.exe	90
PID 3708 wrote to memory of 5076	3708	Umbral.exe	92
PID 3708 wrote to memory of 5076	3708	Umbral.exe	92
PID 3708 wrote to memory of 844	3708	Umbral.exe	95
PID 3708 wrote to memory of 844	3708	Umbral.exe	95
PID 3708 wrote to memory of 3232	3708	Umbral.exe	97
PID 3708 wrote to memory of 3232	3708	Umbral.exe	97
PID 3708 wrote to memory of 3876	3708	Umbral.exe	99
PID 3708 wrote to memory of 3876	3708	Umbral.exe	99
PID 3708 wrote to memory of 3552	3708	Umbral.exe	104
PID 3708 wrote to memory of 3552	3708	Umbral.exe	104
PID 3708 wrote to memory of 1320	3708	Umbral.exe	106
PID 3708 wrote to memory of 1320	3708	Umbral.exe	106
PID 3708 wrote to memory of 4492	3708	Umbral.exe	108
PID 3708 wrote to memory of 4492	3708	Umbral.exe	108
PID 3708 wrote to memory of 2996	3708	Umbral.exe	110
PID 3708 wrote to memory of 2996	3708	Umbral.exe	110
PID 3708 wrote to memory of 4084	3708	Umbral.exe	112
PID 3708 wrote to memory of 4084	3708	Umbral.exe	112
PID 3708 wrote to memory of 3264	3708	Umbral.exe	115
PID 3708 wrote to memory of 3264	3708	Umbral.exe	115
PID 3264 wrote to memory of 1844	3264	cmd.exe	117
PID 3264 wrote to memory of 1844	3264	cmd.exe	117

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1664	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:3708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1840
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:1664
- 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:5076
- 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:844
- 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:3232
- 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:3876
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3552
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1320
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4492
- 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:2996
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4084
- 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:3264
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1844

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
6c47b3f4e68eebd47e9332eebfd2dd4e

SHA1
67f0b143336d7db7b281ed3de5e877fa87261834

SHA256
8c48b1f2338e5b24094821f41121d2221f1cb3200338f46df49f64d1c4bc3e0c

SHA512
0acf302a9fc971ef9df65ed42c47ea17828e54dff685f4434f360556fd27cdc26a75069f00dcdc14ba174893c6fd7a2cfd8c6c07be3ce35dafee0a006914eaca

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

Filesize
948B

MD5
17d8127be94d3c1b6fcc9a4ed585003e

SHA1
789874fcc7c778c723f3e89822d8cc8750c6c4c8

SHA256
ea357ad1f95863b3618d31e5b0f90495331f64de2b784d9e185b48668c937a7b

SHA512
bb18b6d07d82227f5cfbe3eb460df79ec892c560ad2964dcd4782aa26336ae15059843bf46a739bdd4a4daa58057f99102531a756a1cf434ce6449b3cd35a98e

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_npkm55tb.vyy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3708-72-0x0000025A699C0000-0x0000025A699D2000-memory.dmp

Filesize
72KB

Download
memory/3708-35-0x0000025A69900000-0x0000025A6991E000-memory.dmp

Filesize
120KB

Download
memory/3708-92-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/3708-88-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/3708-2-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/3708-33-0x0000025A69B30000-0x0000025A69BA6000-memory.dmp

Filesize
472KB

Download
memory/3708-34-0x0000025A69930000-0x0000025A69980000-memory.dmp

Filesize
320KB

Download
memory/3708-87-0x00007FFFDEE53000-0x00007FFFDEE55000-memory.dmp

Filesize
8KB

Download
memory/3708-1-0x0000025A67370000-0x0000025A673DE000-memory.dmp

Filesize
440KB

Download
memory/3708-0-0x00007FFFDEE53000-0x00007FFFDEE55000-memory.dmp

Filesize
8KB

Download
memory/3708-71-0x0000025A69990000-0x0000025A6999A000-memory.dmp

Filesize
40KB

Download
memory/5076-4-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/5076-3-0x0000022B31A50000-0x0000022B31A72000-memory.dmp

Filesize
136KB

Download
memory/5076-15-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/5076-14-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download
memory/5076-18-0x00007FFFDEE50000-0x00007FFFDF911000-memory.dmp

Filesize
10.8MB

Download