umbral | c2caa0fa4a868c131c9139635dd57f67ec1bba9283ab4b0a121fdff5a4a21082

Analysis

max time kernel
461s
max time network
1183s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
07-06-2024 19:22

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General

Target

TEST.exe
Size

229KB
MD5

9dc985d83754309760ae45747d8081c2
SHA1

b60e1c39ee8da20c5bdf1df501fab12fd45eaf50
SHA256

f3fdf0137c30af49a71a174e204795a0b96ef2a8a0a53fda4add34574f79005b
SHA512

d0908c5e493bd83cd58e73b715c9318cb6032bb388d7c6ffbdc75b4bb813e594153a57e2ecebbe0a2d1aa0513312be16886b08ad8b91fc590217838057a730cf
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD4hYBSGELnsmd42X3WVzb8e1mzi:voZtL+EP8hYBSGELnsmd42X3WtB

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3432-1-0x0000026A04470000-0x0000026A044B0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2280	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	TEST.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
20	discord.com
21	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
17	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4136	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2280	powershell.exe
2280	powershell.exe
740	powershell.exe
740	powershell.exe
2792	powershell.exe
2792	powershell.exe
1544	powershell.exe
1544	powershell.exe
1776	powershell.exe
1776	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3432	TEST.exe
Token: SeDebugPrivilege	2280	powershell.exe
Token: SeDebugPrivilege	740	powershell.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeDebugPrivilege	1544	powershell.exe
Token: SeIncreaseQuotaPrivilege	3096	wmic.exe
Token: SeSecurityPrivilege	3096	wmic.exe
Token: SeTakeOwnershipPrivilege	3096	wmic.exe
Token: SeLoadDriverPrivilege	3096	wmic.exe
Token: SeSystemProfilePrivilege	3096	wmic.exe
Token: SeSystemtimePrivilege	3096	wmic.exe
Token: SeProfSingleProcessPrivilege	3096	wmic.exe
Token: SeIncBasePriorityPrivilege	3096	wmic.exe
Token: SeCreatePagefilePrivilege	3096	wmic.exe
Token: SeBackupPrivilege	3096	wmic.exe
Token: SeRestorePrivilege	3096	wmic.exe
Token: SeShutdownPrivilege	3096	wmic.exe
Token: SeDebugPrivilege	3096	wmic.exe
Token: SeSystemEnvironmentPrivilege	3096	wmic.exe
Token: SeRemoteShutdownPrivilege	3096	wmic.exe
Token: SeUndockPrivilege	3096	wmic.exe
Token: SeManageVolumePrivilege	3096	wmic.exe
Token: 33	3096	wmic.exe
Token: 34	3096	wmic.exe
Token: 35	3096	wmic.exe
Token: 36	3096	wmic.exe
Token: SeIncreaseQuotaPrivilege	3096	wmic.exe
Token: SeSecurityPrivilege	3096	wmic.exe
Token: SeTakeOwnershipPrivilege	3096	wmic.exe
Token: SeLoadDriverPrivilege	3096	wmic.exe
Token: SeSystemProfilePrivilege	3096	wmic.exe
Token: SeSystemtimePrivilege	3096	wmic.exe
Token: SeProfSingleProcessPrivilege	3096	wmic.exe
Token: SeIncBasePriorityPrivilege	3096	wmic.exe
Token: SeCreatePagefilePrivilege	3096	wmic.exe
Token: SeBackupPrivilege	3096	wmic.exe
Token: SeRestorePrivilege	3096	wmic.exe
Token: SeShutdownPrivilege	3096	wmic.exe
Token: SeDebugPrivilege	3096	wmic.exe
Token: SeSystemEnvironmentPrivilege	3096	wmic.exe
Token: SeRemoteShutdownPrivilege	3096	wmic.exe
Token: SeUndockPrivilege	3096	wmic.exe
Token: SeManageVolumePrivilege	3096	wmic.exe
Token: 33	3096	wmic.exe
Token: 34	3096	wmic.exe
Token: 35	3096	wmic.exe
Token: 36	3096	wmic.exe
Token: SeIncreaseQuotaPrivilege	744	wmic.exe
Token: SeSecurityPrivilege	744	wmic.exe
Token: SeTakeOwnershipPrivilege	744	wmic.exe
Token: SeLoadDriverPrivilege	744	wmic.exe
Token: SeSystemProfilePrivilege	744	wmic.exe
Token: SeSystemtimePrivilege	744	wmic.exe
Token: SeProfSingleProcessPrivilege	744	wmic.exe
Token: SeIncBasePriorityPrivilege	744	wmic.exe
Token: SeCreatePagefilePrivilege	744	wmic.exe
Token: SeBackupPrivilege	744	wmic.exe
Token: SeRestorePrivilege	744	wmic.exe
Token: SeShutdownPrivilege	744	wmic.exe
Token: SeDebugPrivilege	744	wmic.exe
Token: SeSystemEnvironmentPrivilege	744	wmic.exe
Token: SeRemoteShutdownPrivilege	744	wmic.exe
Token: SeUndockPrivilege	744	wmic.exe
Token: SeManageVolumePrivilege	744	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3432 wrote to memory of 2280	3432	TEST.exe	82
PID 3432 wrote to memory of 2280	3432	TEST.exe	82
PID 3432 wrote to memory of 740	3432	TEST.exe	86
PID 3432 wrote to memory of 740	3432	TEST.exe	86
PID 3432 wrote to memory of 2792	3432	TEST.exe	88
PID 3432 wrote to memory of 2792	3432	TEST.exe	88
PID 3432 wrote to memory of 1544	3432	TEST.exe	90
PID 3432 wrote to memory of 1544	3432	TEST.exe	90
PID 3432 wrote to memory of 3096	3432	TEST.exe	92
PID 3432 wrote to memory of 3096	3432	TEST.exe	92
PID 3432 wrote to memory of 744	3432	TEST.exe	95
PID 3432 wrote to memory of 744	3432	TEST.exe	95
PID 3432 wrote to memory of 2260	3432	TEST.exe	97
PID 3432 wrote to memory of 2260	3432	TEST.exe	97
PID 3432 wrote to memory of 1776	3432	TEST.exe	99
PID 3432 wrote to memory of 1776	3432	TEST.exe	99
PID 3432 wrote to memory of 4136	3432	TEST.exe	101
PID 3432 wrote to memory of 4136	3432	TEST.exe	101

C:\Users\Admin\AppData\Local\Temp\TEST.exe
"C:\Users\Admin\AppData\Local\Temp\TEST.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3432
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\TEST.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2280
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:740
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2792
- 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:1544
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3096
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2260
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1776
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4136

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
0b8cb2e6dd5794b6a56a4bdbbd430fd7

SHA1
2b08e348c3489c6a35761af073018e3784c12074

SHA256
bcce0d44e33747e4c39df9afbd0a4e98a47ded0188375e4dfdd94cafbb366e1f

SHA512
15ce3b588aa80899f69b0313c7e188d886bddbd09783ca732ac33f9ae8e4e017a72b6f98919f581383a4582732575e5faedb0dea87e01cf2b657424945fdf4d2

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
ec79fae4e7c09310ebf4f2d85a33a638

SHA1
f2bdd995b12e65e7ed437d228f22223b59e76efb

SHA256
e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

SHA512
af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tkyfzb25.m3z.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2280-13-0x000001C2219B0000-0x000001C2219D2000-memory.dmp

Filesize
136KB

Download
memory/2280-14-0x00007FFBAB440000-0x00007FFBABF01000-memory.dmp

Filesize
10.8MB

Download
memory/2280-15-0x00007FFBAB440000-0x00007FFBABF01000-memory.dmp

Filesize
10.8MB

Download
memory/2280-18-0x00007FFBAB440000-0x00007FFBABF01000-memory.dmp

Filesize
10.8MB

Download
memory/2280-3-0x00007FFBAB440000-0x00007FFBABF01000-memory.dmp

Filesize
10.8MB

Download
memory/3432-33-0x0000026A1EB60000-0x0000026A1EBB0000-memory.dmp

Filesize
320KB

Download
memory/3432-32-0x0000026A1EBE0000-0x0000026A1EC56000-memory.dmp

Filesize
472KB

Download
memory/3432-34-0x0000026A1EC60000-0x0000026A1EC7E000-memory.dmp

Filesize
120KB

Download
memory/3432-1-0x0000026A04470000-0x0000026A044B0000-memory.dmp

Filesize
256KB

Download
memory/3432-0-0x00007FFBAB443000-0x00007FFBAB445000-memory.dmp

Filesize
8KB

Download
memory/3432-69-0x0000026A06230000-0x0000026A0623A000-memory.dmp

Filesize
40KB

Download
memory/3432-70-0x0000026A1EC80000-0x0000026A1EC92000-memory.dmp

Filesize
72KB

Download
memory/3432-2-0x00007FFBAB440000-0x00007FFBABF01000-memory.dmp

Filesize
10.8MB

Download
memory/3432-86-0x00007FFBAB440000-0x00007FFBABF01000-memory.dmp

Filesize
10.8MB

Download