umbral | c2fe8b9e983021434ee8805969733c76b0e598a49bb24b3bd9e51ca18ef964bf

Analysis

max time kernel
99s
max time network
143s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241211-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
30-12-2024 23:21

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General

Target

wexside.exe
Size

238KB
MD5

197e386d613b87bb8b3c834228ba2d18
SHA1

095c5dcb7d12080dc47df4fec784fd053bd55931
SHA256

c2fe8b9e983021434ee8805969733c76b0e598a49bb24b3bd9e51ca18ef964bf
SHA512

33371058ee6e1fbdce569c74d619a8bc1c3d00cd693b4e9687ab8ea68c7fb0bfd7e8113893de7a44b1824f543b9555606d1cd5c2f0ff32f5dc052774263b82a7
SSDEEP

6144:DloZM+rIkd8g+EtXHkv/iD4EnxpjpaC9Qop7mGzkob8e1motiN:hoZtL+EP8EnxpjpaC9Qop7mGzVy

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral3/memory/3260-1-0x0000021F7B190000-0x0000021F7B1D2000-memory.dmp	family_umbral

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

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
1272	powershell.exe
1872	powershell.exe
1164	powershell.exe
4932	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	wexside.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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
9	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
2996	cmd.exe
5104	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4520	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5104	PING.EXE

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
4740	wmic.exe
4740	wmic.exe
4740	wmic.exe
4740	wmic.exe
3260	wexside.exe
1272	powershell.exe
1272	powershell.exe
1872	powershell.exe
1872	powershell.exe
1164	powershell.exe
1164	powershell.exe
2988	powershell.exe
2988	powershell.exe
5068	wmic.exe
5068	wmic.exe
5068	wmic.exe
5068	wmic.exe
1988	wmic.exe
1988	wmic.exe
1988	wmic.exe
1988	wmic.exe
4964	wmic.exe
4964	wmic.exe
4964	wmic.exe
4964	wmic.exe
4932	powershell.exe
4932	powershell.exe
4520	wmic.exe
4520	wmic.exe
4520	wmic.exe
4520	wmic.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3260	wexside.exe
Token: SeIncreaseQuotaPrivilege	4740	wmic.exe
Token: SeSecurityPrivilege	4740	wmic.exe
Token: SeTakeOwnershipPrivilege	4740	wmic.exe
Token: SeLoadDriverPrivilege	4740	wmic.exe
Token: SeSystemProfilePrivilege	4740	wmic.exe
Token: SeSystemtimePrivilege	4740	wmic.exe
Token: SeProfSingleProcessPrivilege	4740	wmic.exe
Token: SeIncBasePriorityPrivilege	4740	wmic.exe
Token: SeCreatePagefilePrivilege	4740	wmic.exe
Token: SeBackupPrivilege	4740	wmic.exe
Token: SeRestorePrivilege	4740	wmic.exe
Token: SeShutdownPrivilege	4740	wmic.exe
Token: SeDebugPrivilege	4740	wmic.exe
Token: SeSystemEnvironmentPrivilege	4740	wmic.exe
Token: SeRemoteShutdownPrivilege	4740	wmic.exe
Token: SeUndockPrivilege	4740	wmic.exe
Token: SeManageVolumePrivilege	4740	wmic.exe
Token: 33	4740	wmic.exe
Token: 34	4740	wmic.exe
Token: 35	4740	wmic.exe
Token: 36	4740	wmic.exe
Token: SeIncreaseQuotaPrivilege	4740	wmic.exe
Token: SeSecurityPrivilege	4740	wmic.exe
Token: SeTakeOwnershipPrivilege	4740	wmic.exe
Token: SeLoadDriverPrivilege	4740	wmic.exe
Token: SeSystemProfilePrivilege	4740	wmic.exe
Token: SeSystemtimePrivilege	4740	wmic.exe
Token: SeProfSingleProcessPrivilege	4740	wmic.exe
Token: SeIncBasePriorityPrivilege	4740	wmic.exe
Token: SeCreatePagefilePrivilege	4740	wmic.exe
Token: SeBackupPrivilege	4740	wmic.exe
Token: SeRestorePrivilege	4740	wmic.exe
Token: SeShutdownPrivilege	4740	wmic.exe
Token: SeDebugPrivilege	4740	wmic.exe
Token: SeSystemEnvironmentPrivilege	4740	wmic.exe
Token: SeRemoteShutdownPrivilege	4740	wmic.exe
Token: SeUndockPrivilege	4740	wmic.exe
Token: SeManageVolumePrivilege	4740	wmic.exe
Token: 33	4740	wmic.exe
Token: 34	4740	wmic.exe
Token: 35	4740	wmic.exe
Token: 36	4740	wmic.exe
Token: SeDebugPrivilege	1272	powershell.exe
Token: SeIncreaseQuotaPrivilege	1272	powershell.exe
Token: SeSecurityPrivilege	1272	powershell.exe
Token: SeTakeOwnershipPrivilege	1272	powershell.exe
Token: SeLoadDriverPrivilege	1272	powershell.exe
Token: SeSystemProfilePrivilege	1272	powershell.exe
Token: SeSystemtimePrivilege	1272	powershell.exe
Token: SeProfSingleProcessPrivilege	1272	powershell.exe
Token: SeIncBasePriorityPrivilege	1272	powershell.exe
Token: SeCreatePagefilePrivilege	1272	powershell.exe
Token: SeBackupPrivilege	1272	powershell.exe
Token: SeRestorePrivilege	1272	powershell.exe
Token: SeShutdownPrivilege	1272	powershell.exe
Token: SeDebugPrivilege	1272	powershell.exe
Token: SeSystemEnvironmentPrivilege	1272	powershell.exe
Token: SeRemoteShutdownPrivilege	1272	powershell.exe
Token: SeUndockPrivilege	1272	powershell.exe
Token: SeManageVolumePrivilege	1272	powershell.exe
Token: 33	1272	powershell.exe
Token: 34	1272	powershell.exe
Token: 35	1272	powershell.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3260 wrote to memory of 4740	3260	wexside.exe	82
PID 3260 wrote to memory of 4740	3260	wexside.exe	82
PID 3260 wrote to memory of 1456	3260	wexside.exe	85
PID 3260 wrote to memory of 1456	3260	wexside.exe	85
PID 3260 wrote to memory of 1272	3260	wexside.exe	87
PID 3260 wrote to memory of 1272	3260	wexside.exe	87
PID 3260 wrote to memory of 1872	3260	wexside.exe	90
PID 3260 wrote to memory of 1872	3260	wexside.exe	90
PID 3260 wrote to memory of 1164	3260	wexside.exe	92
PID 3260 wrote to memory of 1164	3260	wexside.exe	92
PID 3260 wrote to memory of 2988	3260	wexside.exe	94
PID 3260 wrote to memory of 2988	3260	wexside.exe	94
PID 3260 wrote to memory of 5068	3260	wexside.exe	98
PID 3260 wrote to memory of 5068	3260	wexside.exe	98
PID 3260 wrote to memory of 1988	3260	wexside.exe	100
PID 3260 wrote to memory of 1988	3260	wexside.exe	100
PID 3260 wrote to memory of 4964	3260	wexside.exe	102
PID 3260 wrote to memory of 4964	3260	wexside.exe	102
PID 3260 wrote to memory of 4932	3260	wexside.exe	104
PID 3260 wrote to memory of 4932	3260	wexside.exe	104
PID 3260 wrote to memory of 4520	3260	wexside.exe	106
PID 3260 wrote to memory of 4520	3260	wexside.exe	106
PID 3260 wrote to memory of 2996	3260	wexside.exe	109
PID 3260 wrote to memory of 2996	3260	wexside.exe	109
PID 2996 wrote to memory of 5104	2996	cmd.exe	111
PID 2996 wrote to memory of 5104	2996	cmd.exe	111

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1456	attrib.exe

C:\Users\Admin\AppData\Local\Temp\wexside.exe
"C:\Users\Admin\AppData\Local\Temp\wexside.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3260
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4740
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\wexside.exe"
  2⤵
  - Views/modifies file attributes
  PID:1456
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\wexside.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1272
- 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
  PID:1872
- 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
  PID:1164
- 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
  PID:2988
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:5068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1988
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4964
- 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:4932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  - Suspicious behavior: EnumeratesProcesses
  PID:4520
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\wexside.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2996
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:5104

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
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
d6d1b8bb34838ccf42d5f69e919b1612

SHA1
20e9df1f5dd5908ce1b537d158961e0b1674949e

SHA256
8a4e7eae00df2e789c958a38e78ac0b53f439afe2d5bfe8a81fb8c6e232b6491

SHA512
ff3ba5dc3cb548018747a315f098e01c5a6f8aee029223ef4080b3db76b0ecaa6a01a1c79e1434bdf2aa5b2ae66ec85d33e760064282411c7712fba890a0309d

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

Filesize
948B

MD5
a9ab4419e3986b8e240c9478cc52eb51

SHA1
7e1b1b31bc47b9d4dccea76e6511d3632cb0395e

SHA256
87c993fd034df762cdf24506c046959e98985d38697b234f7ca092db49671846

SHA512
8f3d3ac39795b11719f40d3eb9a574576c8a5e6b837a1f3d63f7996faaf728e02ec5e26f4bed71ab850c9fa9272ec94fb6449b251eadc82672f84bdd5ec256a6

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

Filesize
1KB

MD5
8e1fdd1b66d2fee9f6a052524d4ddca5

SHA1
0a9d0994559d1be2eecd8b0d6960540ca627bdb6

SHA256
4cc7c1b79d1b48582d4dc27ca8c31457b9bf2441deb7914399bb9e6863f18b13

SHA512
5a5494b878b08e8515811ab7a3d68780dac7423f5562477d98249a8bedf7ec98567b7cd5d4c6967d6bc63f2d6d9b7da9a65e0eb29d4b955026b469b5b598d1f3

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

Filesize
1KB

MD5
5a0df240cb43647883ec0b33fd731423

SHA1
845eaa0564aca19706ccc4ab1687f52b6c78f98a

SHA256
425c0bd39a54a400b79bd6649364ce122a5a25169cc1175314b7be36f5616016

SHA512
415d6acbc7905c5e5029affc59f9a8a5207941718e6f463e96c22c9d1d3323e669c9264fe5b40759f8b94c7cfefbb4c362562ac57efe060f8315e48302266eea

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wsv1qigy.dbm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1272-4-0x00007FFDC1B40000-0x00007FFDC2602000-memory.dmp

Filesize
10.8MB

Download
memory/1272-14-0x00000224392E0000-0x0000022439302000-memory.dmp

Filesize
136KB

Download
memory/1272-15-0x00007FFDC1B40000-0x00007FFDC2602000-memory.dmp

Filesize
10.8MB

Download
memory/1272-18-0x00007FFDC1B40000-0x00007FFDC2602000-memory.dmp

Filesize
10.8MB

Download
memory/1272-3-0x00007FFDC1B40000-0x00007FFDC2602000-memory.dmp

Filesize
10.8MB

Download
memory/3260-33-0x0000021F7D870000-0x0000021F7D8C0000-memory.dmp

Filesize
320KB

Download
memory/3260-32-0x0000021F7D8C0000-0x0000021F7D936000-memory.dmp

Filesize
472KB

Download
memory/3260-34-0x0000021F7D970000-0x0000021F7D98E000-memory.dmp

Filesize
120KB

Download
memory/3260-1-0x0000021F7B190000-0x0000021F7B1D2000-memory.dmp

Filesize
264KB

Download
memory/3260-0-0x00007FFDC1B43000-0x00007FFDC1B45000-memory.dmp

Filesize
8KB

Download
memory/3260-59-0x0000021F7DA90000-0x0000021F7DAA2000-memory.dmp

Filesize
72KB

Download
memory/3260-58-0x0000021F7D860000-0x0000021F7D86A000-memory.dmp

Filesize
40KB

Download
memory/3260-2-0x00007FFDC1B40000-0x00007FFDC2602000-memory.dmp

Filesize
10.8MB

Download
memory/3260-77-0x00007FFDC1B40000-0x00007FFDC2602000-memory.dmp

Filesize
10.8MB

Download