umbral | c6e3deb37384306e5bc08d51469e978c001ee54cf0ad8baa59942eda2c849b6b

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
02/02/2025, 19:41

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General

Target

sws.exe
Size

227KB
MD5

46fb05503b2ba89656a6b2f95e5572ad
SHA1

01dac03ded08fc26c42fd88c77090aa6f4cea70e
SHA256

c6e3deb37384306e5bc08d51469e978c001ee54cf0ad8baa59942eda2c849b6b
SHA512

7bf112ab9a4df51776c75bd933af3400ec909473389238e13797b61e055236cfacc02d06558061c03a542c3fda0d1575b19646029a2b09c9e45119bf699934a0
SSDEEP

6144:eloZM+rIkd8g+EtXHkv/iD43tny5nsAvpOXZkQlK8Zb8e1m8hEi:IoZtL+EP83tny5nsAvpOXZkQlr9

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1928-1-0x0000000000ED0000-0x0000000000F10000-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
2660	powershell.exe
2704	powershell.exe
2840	powershell.exe
2564	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2716	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
9	discord.com
10	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
2716	cmd.exe
1692	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2624	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1692	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1928	sws.exe
2660	powershell.exe
2564	powershell.exe
2704	powershell.exe
2288	powershell.exe
2840	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1928	sws.exe
Token: SeIncreaseQuotaPrivilege	2900	wmic.exe
Token: SeSecurityPrivilege	2900	wmic.exe
Token: SeTakeOwnershipPrivilege	2900	wmic.exe
Token: SeLoadDriverPrivilege	2900	wmic.exe
Token: SeSystemProfilePrivilege	2900	wmic.exe
Token: SeSystemtimePrivilege	2900	wmic.exe
Token: SeProfSingleProcessPrivilege	2900	wmic.exe
Token: SeIncBasePriorityPrivilege	2900	wmic.exe
Token: SeCreatePagefilePrivilege	2900	wmic.exe
Token: SeBackupPrivilege	2900	wmic.exe
Token: SeRestorePrivilege	2900	wmic.exe
Token: SeShutdownPrivilege	2900	wmic.exe
Token: SeDebugPrivilege	2900	wmic.exe
Token: SeSystemEnvironmentPrivilege	2900	wmic.exe
Token: SeRemoteShutdownPrivilege	2900	wmic.exe
Token: SeUndockPrivilege	2900	wmic.exe
Token: SeManageVolumePrivilege	2900	wmic.exe
Token: 33	2900	wmic.exe
Token: 34	2900	wmic.exe
Token: 35	2900	wmic.exe
Token: SeIncreaseQuotaPrivilege	2900	wmic.exe
Token: SeSecurityPrivilege	2900	wmic.exe
Token: SeTakeOwnershipPrivilege	2900	wmic.exe
Token: SeLoadDriverPrivilege	2900	wmic.exe
Token: SeSystemProfilePrivilege	2900	wmic.exe
Token: SeSystemtimePrivilege	2900	wmic.exe
Token: SeProfSingleProcessPrivilege	2900	wmic.exe
Token: SeIncBasePriorityPrivilege	2900	wmic.exe
Token: SeCreatePagefilePrivilege	2900	wmic.exe
Token: SeBackupPrivilege	2900	wmic.exe
Token: SeRestorePrivilege	2900	wmic.exe
Token: SeShutdownPrivilege	2900	wmic.exe
Token: SeDebugPrivilege	2900	wmic.exe
Token: SeSystemEnvironmentPrivilege	2900	wmic.exe
Token: SeRemoteShutdownPrivilege	2900	wmic.exe
Token: SeUndockPrivilege	2900	wmic.exe
Token: SeManageVolumePrivilege	2900	wmic.exe
Token: 33	2900	wmic.exe
Token: 34	2900	wmic.exe
Token: 35	2900	wmic.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	2564	powershell.exe
Token: SeDebugPrivilege	2704	powershell.exe
Token: SeDebugPrivilege	2288	powershell.exe
Token: SeIncreaseQuotaPrivilege	1988	wmic.exe
Token: SeSecurityPrivilege	1988	wmic.exe
Token: SeTakeOwnershipPrivilege	1988	wmic.exe
Token: SeLoadDriverPrivilege	1988	wmic.exe
Token: SeSystemProfilePrivilege	1988	wmic.exe
Token: SeSystemtimePrivilege	1988	wmic.exe
Token: SeProfSingleProcessPrivilege	1988	wmic.exe
Token: SeIncBasePriorityPrivilege	1988	wmic.exe
Token: SeCreatePagefilePrivilege	1988	wmic.exe
Token: SeBackupPrivilege	1988	wmic.exe
Token: SeRestorePrivilege	1988	wmic.exe
Token: SeShutdownPrivilege	1988	wmic.exe
Token: SeDebugPrivilege	1988	wmic.exe
Token: SeSystemEnvironmentPrivilege	1988	wmic.exe
Token: SeRemoteShutdownPrivilege	1988	wmic.exe
Token: SeUndockPrivilege	1988	wmic.exe
Token: SeManageVolumePrivilege	1988	wmic.exe
Token: 33	1988	wmic.exe
Token: 34	1988	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1928 wrote to memory of 2900	1928	sws.exe	31
PID 1928 wrote to memory of 2900	1928	sws.exe	31
PID 1928 wrote to memory of 2900	1928	sws.exe	31
PID 1928 wrote to memory of 2920	1928	sws.exe	34
PID 1928 wrote to memory of 2920	1928	sws.exe	34
PID 1928 wrote to memory of 2920	1928	sws.exe	34
PID 1928 wrote to memory of 2660	1928	sws.exe	36
PID 1928 wrote to memory of 2660	1928	sws.exe	36
PID 1928 wrote to memory of 2660	1928	sws.exe	36
PID 1928 wrote to memory of 2564	1928	sws.exe	38
PID 1928 wrote to memory of 2564	1928	sws.exe	38
PID 1928 wrote to memory of 2564	1928	sws.exe	38
PID 1928 wrote to memory of 2704	1928	sws.exe	40
PID 1928 wrote to memory of 2704	1928	sws.exe	40
PID 1928 wrote to memory of 2704	1928	sws.exe	40
PID 1928 wrote to memory of 2288	1928	sws.exe	42
PID 1928 wrote to memory of 2288	1928	sws.exe	42
PID 1928 wrote to memory of 2288	1928	sws.exe	42
PID 1928 wrote to memory of 1988	1928	sws.exe	44
PID 1928 wrote to memory of 1988	1928	sws.exe	44
PID 1928 wrote to memory of 1988	1928	sws.exe	44
PID 1928 wrote to memory of 1488	1928	sws.exe	46
PID 1928 wrote to memory of 1488	1928	sws.exe	46
PID 1928 wrote to memory of 1488	1928	sws.exe	46
PID 1928 wrote to memory of 1244	1928	sws.exe	48
PID 1928 wrote to memory of 1244	1928	sws.exe	48
PID 1928 wrote to memory of 1244	1928	sws.exe	48
PID 1928 wrote to memory of 2840	1928	sws.exe	50
PID 1928 wrote to memory of 2840	1928	sws.exe	50
PID 1928 wrote to memory of 2840	1928	sws.exe	50
PID 1928 wrote to memory of 2624	1928	sws.exe	52
PID 1928 wrote to memory of 2624	1928	sws.exe	52
PID 1928 wrote to memory of 2624	1928	sws.exe	52
PID 1928 wrote to memory of 2716	1928	sws.exe	54
PID 1928 wrote to memory of 2716	1928	sws.exe	54
PID 1928 wrote to memory of 2716	1928	sws.exe	54
PID 2716 wrote to memory of 1692	2716	cmd.exe	56
PID 2716 wrote to memory of 1692	2716	cmd.exe	56
PID 2716 wrote to memory of 1692	2716	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2920	attrib.exe

C:\Users\Admin\AppData\Local\Temp\sws.exe
"C:\Users\Admin\AppData\Local\Temp\sws.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1928
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2900
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\sws.exe"
  2⤵
  - Views/modifies file attributes
  PID:2920
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\sws.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2660
- 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:2564
- 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:2704
- 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:2288
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1988
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1244
- 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:2840
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2624
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\sws.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1692

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
d3fd7c458b25634b9baea08616bc53fa

SHA1
7e80060f257f273a390e669c49b11fc3ccf90621

SHA256
12dd7a42c2757d3659fc4a76187390f624d91d48fcb9bdc56af1af307cc1457e

SHA512
8cfd542b4a924527bf0d0fd40dab3716130c9914520e55062f1b0baaf5b02e356b3775bacc075facb1822d7775a5ca2956adc2574765375b8177a741bba5213c

Download Submit
memory/1928-0-0x000007FEF5813000-0x000007FEF5814000-memory.dmp

Filesize
4KB

Download
memory/1928-1-0x0000000000ED0000-0x0000000000F10000-memory.dmp

Filesize
256KB

Download
memory/1928-2-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/1928-47-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2564-14-0x000000001B7C0000-0x000000001BAA2000-memory.dmp

Filesize
2.9MB

Download
memory/2564-15-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download
memory/2660-7-0x000000001B550000-0x000000001B832000-memory.dmp

Filesize
2.9MB

Download
memory/2660-8-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/2840-43-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download