umbral | c2fe8b9e983021434ee8805969733c76b0e598a49bb24b3bd9e51ca18ef964bf

Analysis

max time kernel
147s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-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
behavioral4/memory/1604-1-0x00000210C9150000-0x00000210C9192000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
476	powershell.exe
2336	powershell.exe
1324	powershell.exe
880	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
1	discord.com
6	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
1	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
4600	cmd.exe
4996	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4784	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4996	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1604	wexside.exe
880	powershell.exe
880	powershell.exe
476	powershell.exe
476	powershell.exe
2336	powershell.exe
2336	powershell.exe
2532	powershell.exe
2532	powershell.exe
1324	powershell.exe
1324	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1604	wexside.exe
Token: SeIncreaseQuotaPrivilege	4632	wmic.exe
Token: SeSecurityPrivilege	4632	wmic.exe
Token: SeTakeOwnershipPrivilege	4632	wmic.exe
Token: SeLoadDriverPrivilege	4632	wmic.exe
Token: SeSystemProfilePrivilege	4632	wmic.exe
Token: SeSystemtimePrivilege	4632	wmic.exe
Token: SeProfSingleProcessPrivilege	4632	wmic.exe
Token: SeIncBasePriorityPrivilege	4632	wmic.exe
Token: SeCreatePagefilePrivilege	4632	wmic.exe
Token: SeBackupPrivilege	4632	wmic.exe
Token: SeRestorePrivilege	4632	wmic.exe
Token: SeShutdownPrivilege	4632	wmic.exe
Token: SeDebugPrivilege	4632	wmic.exe
Token: SeSystemEnvironmentPrivilege	4632	wmic.exe
Token: SeRemoteShutdownPrivilege	4632	wmic.exe
Token: SeUndockPrivilege	4632	wmic.exe
Token: SeManageVolumePrivilege	4632	wmic.exe
Token: 33	4632	wmic.exe
Token: 34	4632	wmic.exe
Token: 35	4632	wmic.exe
Token: 36	4632	wmic.exe
Token: SeIncreaseQuotaPrivilege	4632	wmic.exe
Token: SeSecurityPrivilege	4632	wmic.exe
Token: SeTakeOwnershipPrivilege	4632	wmic.exe
Token: SeLoadDriverPrivilege	4632	wmic.exe
Token: SeSystemProfilePrivilege	4632	wmic.exe
Token: SeSystemtimePrivilege	4632	wmic.exe
Token: SeProfSingleProcessPrivilege	4632	wmic.exe
Token: SeIncBasePriorityPrivilege	4632	wmic.exe
Token: SeCreatePagefilePrivilege	4632	wmic.exe
Token: SeBackupPrivilege	4632	wmic.exe
Token: SeRestorePrivilege	4632	wmic.exe
Token: SeShutdownPrivilege	4632	wmic.exe
Token: SeDebugPrivilege	4632	wmic.exe
Token: SeSystemEnvironmentPrivilege	4632	wmic.exe
Token: SeRemoteShutdownPrivilege	4632	wmic.exe
Token: SeUndockPrivilege	4632	wmic.exe
Token: SeManageVolumePrivilege	4632	wmic.exe
Token: 33	4632	wmic.exe
Token: 34	4632	wmic.exe
Token: 35	4632	wmic.exe
Token: 36	4632	wmic.exe
Token: SeDebugPrivilege	880	powershell.exe
Token: SeDebugPrivilege	476	powershell.exe
Token: SeDebugPrivilege	2336	powershell.exe
Token: SeDebugPrivilege	2532	powershell.exe
Token: SeIncreaseQuotaPrivilege	2272	wmic.exe
Token: SeSecurityPrivilege	2272	wmic.exe
Token: SeTakeOwnershipPrivilege	2272	wmic.exe
Token: SeLoadDriverPrivilege	2272	wmic.exe
Token: SeSystemProfilePrivilege	2272	wmic.exe
Token: SeSystemtimePrivilege	2272	wmic.exe
Token: SeProfSingleProcessPrivilege	2272	wmic.exe
Token: SeIncBasePriorityPrivilege	2272	wmic.exe
Token: SeCreatePagefilePrivilege	2272	wmic.exe
Token: SeBackupPrivilege	2272	wmic.exe
Token: SeRestorePrivilege	2272	wmic.exe
Token: SeShutdownPrivilege	2272	wmic.exe
Token: SeDebugPrivilege	2272	wmic.exe
Token: SeSystemEnvironmentPrivilege	2272	wmic.exe
Token: SeRemoteShutdownPrivilege	2272	wmic.exe
Token: SeUndockPrivilege	2272	wmic.exe
Token: SeManageVolumePrivilege	2272	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1604 wrote to memory of 4632	1604	wexside.exe	78
PID 1604 wrote to memory of 4632	1604	wexside.exe	78
PID 1604 wrote to memory of 3440	1604	wexside.exe	81
PID 1604 wrote to memory of 3440	1604	wexside.exe	81
PID 1604 wrote to memory of 880	1604	wexside.exe	83
PID 1604 wrote to memory of 880	1604	wexside.exe	83
PID 1604 wrote to memory of 476	1604	wexside.exe	85
PID 1604 wrote to memory of 476	1604	wexside.exe	85
PID 1604 wrote to memory of 2336	1604	wexside.exe	87
PID 1604 wrote to memory of 2336	1604	wexside.exe	87
PID 1604 wrote to memory of 2532	1604	wexside.exe	89
PID 1604 wrote to memory of 2532	1604	wexside.exe	89
PID 1604 wrote to memory of 2272	1604	wexside.exe	91
PID 1604 wrote to memory of 2272	1604	wexside.exe	91
PID 1604 wrote to memory of 1728	1604	wexside.exe	93
PID 1604 wrote to memory of 1728	1604	wexside.exe	93
PID 1604 wrote to memory of 3940	1604	wexside.exe	95
PID 1604 wrote to memory of 3940	1604	wexside.exe	95
PID 1604 wrote to memory of 1324	1604	wexside.exe	97
PID 1604 wrote to memory of 1324	1604	wexside.exe	97
PID 1604 wrote to memory of 4784	1604	wexside.exe	99
PID 1604 wrote to memory of 4784	1604	wexside.exe	99
PID 1604 wrote to memory of 4600	1604	wexside.exe	101
PID 1604 wrote to memory of 4600	1604	wexside.exe	101
PID 4600 wrote to memory of 4996	4600	cmd.exe	103
PID 4600 wrote to memory of 4996	4600	cmd.exe	103

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3440	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:1604
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4632
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\wexside.exe"
  2⤵
  - Views/modifies file attributes
  PID:3440
- 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:880
- 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:476
- 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:2336
- 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:2532
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2272
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1728
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3940
- 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:1324
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4784
- 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:4600
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4996

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
1fa296616351110091f73106e17e15eb

SHA1
dc687b2563bfb6e90961bfe270a6b5d64300bb83

SHA256
e1e1de5781d5e5beb74bc6e93c5f0a132b9e7c9582de06524177dcac3a24af0d

SHA512
e8dda96fd8dfe88de22271dcc07cc288aeb6d8aff097b61b1802283339d4cd635f094d55b9b0fc0e5beb682639a2b3c865d65d9970544ada5aa1920c93cb98dd

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

Filesize
1KB

MD5
a90b4707584041171553e72b34bfc940

SHA1
70eb4843983d6b57a7f255ace1e5cf3d068d7011

SHA256
378d2414a7626d27d1734ed4f5c9df44569aa85ee20939274c7d638e53b9cb1d

SHA512
2b02e49648472bb20675e5cc711a6a7481a3b185fc23408301dcf46f344e42241dab16134059be6ede27c9af744f5d0060758efcd0b6a6768c2ef486b3f4882e

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

Filesize
1KB

MD5
83f6e5e020e57e01c9165d9085a35c1f

SHA1
eaf3331202b8d9e3cbcfbd05e2da74f449196639

SHA256
4ab76fb219a0d3ffb4e41b86a2a0544af4766585b331f96accfd18cc4b32c53b

SHA512
bd46fe0b1954bc06abf72b826619534a6110a3f9160c7e67ed0c820fbf100bc88fbcc89855d6b33fc5b6259621f9d8efe32be8a171be71c7503b7e934ff125c3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nc3iliaw.33x.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/880-13-0x00007FFFEE620000-0x00007FFFEF0E2000-memory.dmp

Filesize
10.8MB

Download
memory/880-16-0x00007FFFEE620000-0x00007FFFEF0E2000-memory.dmp

Filesize
10.8MB

Download
memory/880-12-0x00007FFFEE620000-0x00007FFFEF0E2000-memory.dmp

Filesize
10.8MB

Download
memory/880-11-0x00000271BBEA0000-0x00000271BBEC2000-memory.dmp

Filesize
136KB

Download
memory/1604-32-0x00000210C96A0000-0x00000210C96BE000-memory.dmp

Filesize
120KB

Download
memory/1604-31-0x00000210E3A40000-0x00000210E3A90000-memory.dmp

Filesize
320KB

Download
memory/1604-30-0x00000210E39C0000-0x00000210E3A36000-memory.dmp

Filesize
472KB

Download
memory/1604-0-0x00007FFFEE623000-0x00007FFFEE625000-memory.dmp

Filesize
8KB

Download
memory/1604-2-0x00007FFFEE620000-0x00007FFFEF0E2000-memory.dmp

Filesize
10.8MB

Download
memory/1604-67-0x00000210CAFB0000-0x00000210CAFBA000-memory.dmp

Filesize
40KB

Download
memory/1604-68-0x00000210E37B0000-0x00000210E37C2000-memory.dmp

Filesize
72KB

Download
memory/1604-1-0x00000210C9150000-0x00000210C9192000-memory.dmp

Filesize
264KB

Download
memory/1604-87-0x00007FFFEE620000-0x00007FFFEF0E2000-memory.dmp

Filesize
10.8MB

Download