umbral | c2fe8b9e983021434ee8805969733c76b0e598a49bb24b3bd9e51ca18ef964bf

Analysis

max time kernel
93s
max time network
148s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-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
behavioral2/memory/1240-1-0x000002B572D50000-0x000002B572D92000-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
464	powershell.exe
2860	powershell.exe
992	powershell.exe
4516	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
22	discord.com
23	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
528	PING.EXE
4052	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3412	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
528	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1240	wexside.exe
464	powershell.exe
464	powershell.exe
2860	powershell.exe
2860	powershell.exe
992	powershell.exe
992	powershell.exe
4852	powershell.exe
4852	powershell.exe
4516	powershell.exe
4516	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1240	wexside.exe
Token: SeIncreaseQuotaPrivilege	4284	wmic.exe
Token: SeSecurityPrivilege	4284	wmic.exe
Token: SeTakeOwnershipPrivilege	4284	wmic.exe
Token: SeLoadDriverPrivilege	4284	wmic.exe
Token: SeSystemProfilePrivilege	4284	wmic.exe
Token: SeSystemtimePrivilege	4284	wmic.exe
Token: SeProfSingleProcessPrivilege	4284	wmic.exe
Token: SeIncBasePriorityPrivilege	4284	wmic.exe
Token: SeCreatePagefilePrivilege	4284	wmic.exe
Token: SeBackupPrivilege	4284	wmic.exe
Token: SeRestorePrivilege	4284	wmic.exe
Token: SeShutdownPrivilege	4284	wmic.exe
Token: SeDebugPrivilege	4284	wmic.exe
Token: SeSystemEnvironmentPrivilege	4284	wmic.exe
Token: SeRemoteShutdownPrivilege	4284	wmic.exe
Token: SeUndockPrivilege	4284	wmic.exe
Token: SeManageVolumePrivilege	4284	wmic.exe
Token: 33	4284	wmic.exe
Token: 34	4284	wmic.exe
Token: 35	4284	wmic.exe
Token: 36	4284	wmic.exe
Token: SeIncreaseQuotaPrivilege	4284	wmic.exe
Token: SeSecurityPrivilege	4284	wmic.exe
Token: SeTakeOwnershipPrivilege	4284	wmic.exe
Token: SeLoadDriverPrivilege	4284	wmic.exe
Token: SeSystemProfilePrivilege	4284	wmic.exe
Token: SeSystemtimePrivilege	4284	wmic.exe
Token: SeProfSingleProcessPrivilege	4284	wmic.exe
Token: SeIncBasePriorityPrivilege	4284	wmic.exe
Token: SeCreatePagefilePrivilege	4284	wmic.exe
Token: SeBackupPrivilege	4284	wmic.exe
Token: SeRestorePrivilege	4284	wmic.exe
Token: SeShutdownPrivilege	4284	wmic.exe
Token: SeDebugPrivilege	4284	wmic.exe
Token: SeSystemEnvironmentPrivilege	4284	wmic.exe
Token: SeRemoteShutdownPrivilege	4284	wmic.exe
Token: SeUndockPrivilege	4284	wmic.exe
Token: SeManageVolumePrivilege	4284	wmic.exe
Token: 33	4284	wmic.exe
Token: 34	4284	wmic.exe
Token: 35	4284	wmic.exe
Token: 36	4284	wmic.exe
Token: SeDebugPrivilege	464	powershell.exe
Token: SeDebugPrivilege	2860	powershell.exe
Token: SeDebugPrivilege	992	powershell.exe
Token: SeDebugPrivilege	4852	powershell.exe
Token: SeIncreaseQuotaPrivilege	3788	wmic.exe
Token: SeSecurityPrivilege	3788	wmic.exe
Token: SeTakeOwnershipPrivilege	3788	wmic.exe
Token: SeLoadDriverPrivilege	3788	wmic.exe
Token: SeSystemProfilePrivilege	3788	wmic.exe
Token: SeSystemtimePrivilege	3788	wmic.exe
Token: SeProfSingleProcessPrivilege	3788	wmic.exe
Token: SeIncBasePriorityPrivilege	3788	wmic.exe
Token: SeCreatePagefilePrivilege	3788	wmic.exe
Token: SeBackupPrivilege	3788	wmic.exe
Token: SeRestorePrivilege	3788	wmic.exe
Token: SeShutdownPrivilege	3788	wmic.exe
Token: SeDebugPrivilege	3788	wmic.exe
Token: SeSystemEnvironmentPrivilege	3788	wmic.exe
Token: SeRemoteShutdownPrivilege	3788	wmic.exe
Token: SeUndockPrivilege	3788	wmic.exe
Token: SeManageVolumePrivilege	3788	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1240 wrote to memory of 4284	1240	wexside.exe	82
PID 1240 wrote to memory of 4284	1240	wexside.exe	82
PID 1240 wrote to memory of 3192	1240	wexside.exe	85
PID 1240 wrote to memory of 3192	1240	wexside.exe	85
PID 1240 wrote to memory of 464	1240	wexside.exe	87
PID 1240 wrote to memory of 464	1240	wexside.exe	87
PID 1240 wrote to memory of 2860	1240	wexside.exe	89
PID 1240 wrote to memory of 2860	1240	wexside.exe	89
PID 1240 wrote to memory of 992	1240	wexside.exe	91
PID 1240 wrote to memory of 992	1240	wexside.exe	91
PID 1240 wrote to memory of 4852	1240	wexside.exe	93
PID 1240 wrote to memory of 4852	1240	wexside.exe	93
PID 1240 wrote to memory of 3788	1240	wexside.exe	95
PID 1240 wrote to memory of 3788	1240	wexside.exe	95
PID 1240 wrote to memory of 1828	1240	wexside.exe	97
PID 1240 wrote to memory of 1828	1240	wexside.exe	97
PID 1240 wrote to memory of 3724	1240	wexside.exe	99
PID 1240 wrote to memory of 3724	1240	wexside.exe	99
PID 1240 wrote to memory of 4516	1240	wexside.exe	101
PID 1240 wrote to memory of 4516	1240	wexside.exe	101
PID 1240 wrote to memory of 3412	1240	wexside.exe	103
PID 1240 wrote to memory of 3412	1240	wexside.exe	103
PID 1240 wrote to memory of 4052	1240	wexside.exe	107
PID 1240 wrote to memory of 4052	1240	wexside.exe	107
PID 4052 wrote to memory of 528	4052	cmd.exe	109
PID 4052 wrote to memory of 528	4052	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3192	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:1240
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4284
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\wexside.exe"
  2⤵
  - Views/modifies file attributes
  PID:3192
- 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:464
- 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:2860
- 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:992
- 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:4852
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3788
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1828
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3724
- 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:4516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3412
- 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:4052
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:528

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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
adb2d5e1a5595365546f2bcd774a5be5

SHA1
b15ab5a08855b1b630197471d7ca7f81df9b8d3e

SHA256
47ea8cc898d4c287d4bbf125ac8f8247e76c9b99e266e4b351948dd0ae05683a

SHA512
fdaa080e169569298012a97de1897e5369aa04650b6c0c29570c88007f7b3d85653dfa86efdc9943c74d37c392fb46c6afc629d31172f4c692539e32d99a1372

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_aqyjuncw.w1k.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/464-5-0x00007FFD0AF00000-0x00007FFD0B9C1000-memory.dmp

Filesize
10.8MB

Download
memory/464-4-0x000002B62BA90000-0x000002B62BAB2000-memory.dmp

Filesize
136KB

Download
memory/464-15-0x00007FFD0AF00000-0x00007FFD0B9C1000-memory.dmp

Filesize
10.8MB

Download
memory/464-18-0x00007FFD0AF00000-0x00007FFD0B9C1000-memory.dmp

Filesize
10.8MB

Download
memory/464-3-0x00007FFD0AF00000-0x00007FFD0B9C1000-memory.dmp

Filesize
10.8MB

Download
memory/1240-34-0x000002B5755A0000-0x000002B5755F0000-memory.dmp

Filesize
320KB

Download
memory/1240-33-0x000002B575520000-0x000002B575596000-memory.dmp

Filesize
472KB

Download
memory/1240-35-0x000002B574B20000-0x000002B574B3E000-memory.dmp

Filesize
120KB

Download
memory/1240-1-0x000002B572D50000-0x000002B572D92000-memory.dmp

Filesize
264KB

Download
memory/1240-0-0x00007FFD0AF03000-0x00007FFD0AF05000-memory.dmp

Filesize
8KB

Download
memory/1240-72-0x000002B573250000-0x000002B57325A000-memory.dmp

Filesize
40KB

Download
memory/1240-73-0x000002B575370000-0x000002B575382000-memory.dmp

Filesize
72KB

Download
memory/1240-2-0x00007FFD0AF00000-0x00007FFD0B9C1000-memory.dmp

Filesize
10.8MB

Download
memory/1240-93-0x00007FFD0AF00000-0x00007FFD0B9C1000-memory.dmp

Filesize
10.8MB

Download