umbral | 0506a1b19dc8f17889113566ad1888b13f0aa9e956b8de39a5e55c36cd268b9a

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
31-05-2024 21:59

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General

Target

Venomer-Rat.exe
Size

235KB
MD5

5a410c6eeda88a58fc797ae80849ef9a
SHA1

433f6296aa36bee061dbfb43ba23d7ea41471728
SHA256

0506a1b19dc8f17889113566ad1888b13f0aa9e956b8de39a5e55c36cd268b9a
SHA512

e8a257b05492b5fa20bbf3d742b28e200bf103490bbb075176281a6e4ddb085a9b994f0b6ef7e0fed1d0cfe27830de55ec736f5956d1991494c85217792b2c8f
SSDEEP

6144:jloZM+rIkd8g+EtXHkv/iD49T0o+fVeGJ8MFXSy3gwb8e1m+sVi:BoZtL+EP89T0o+fVeGJ8MFXSy3dBn

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2140-1-0x0000000000AA0000-0x0000000000AE0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2668	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2084	cmd.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

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

Web Service

T1102

flow	ioc
7	discord.com
8	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2776	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2876	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2140	Venomer-Rat.exe
2668	powershell.exe
2624	powershell.exe
2504	powershell.exe
2408	powershell.exe
1332	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2140	Venomer-Rat.exe
Token: SeIncreaseQuotaPrivilege	3032	wmic.exe
Token: SeSecurityPrivilege	3032	wmic.exe
Token: SeTakeOwnershipPrivilege	3032	wmic.exe
Token: SeLoadDriverPrivilege	3032	wmic.exe
Token: SeSystemProfilePrivilege	3032	wmic.exe
Token: SeSystemtimePrivilege	3032	wmic.exe
Token: SeProfSingleProcessPrivilege	3032	wmic.exe
Token: SeIncBasePriorityPrivilege	3032	wmic.exe
Token: SeCreatePagefilePrivilege	3032	wmic.exe
Token: SeBackupPrivilege	3032	wmic.exe
Token: SeRestorePrivilege	3032	wmic.exe
Token: SeShutdownPrivilege	3032	wmic.exe
Token: SeDebugPrivilege	3032	wmic.exe
Token: SeSystemEnvironmentPrivilege	3032	wmic.exe
Token: SeRemoteShutdownPrivilege	3032	wmic.exe
Token: SeUndockPrivilege	3032	wmic.exe
Token: SeManageVolumePrivilege	3032	wmic.exe
Token: 33	3032	wmic.exe
Token: 34	3032	wmic.exe
Token: 35	3032	wmic.exe
Token: SeIncreaseQuotaPrivilege	3032	wmic.exe
Token: SeSecurityPrivilege	3032	wmic.exe
Token: SeTakeOwnershipPrivilege	3032	wmic.exe
Token: SeLoadDriverPrivilege	3032	wmic.exe
Token: SeSystemProfilePrivilege	3032	wmic.exe
Token: SeSystemtimePrivilege	3032	wmic.exe
Token: SeProfSingleProcessPrivilege	3032	wmic.exe
Token: SeIncBasePriorityPrivilege	3032	wmic.exe
Token: SeCreatePagefilePrivilege	3032	wmic.exe
Token: SeBackupPrivilege	3032	wmic.exe
Token: SeRestorePrivilege	3032	wmic.exe
Token: SeShutdownPrivilege	3032	wmic.exe
Token: SeDebugPrivilege	3032	wmic.exe
Token: SeSystemEnvironmentPrivilege	3032	wmic.exe
Token: SeRemoteShutdownPrivilege	3032	wmic.exe
Token: SeUndockPrivilege	3032	wmic.exe
Token: SeManageVolumePrivilege	3032	wmic.exe
Token: 33	3032	wmic.exe
Token: 34	3032	wmic.exe
Token: 35	3032	wmic.exe
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2504	powershell.exe
Token: SeDebugPrivilege	2408	powershell.exe
Token: SeIncreaseQuotaPrivilege	1784	wmic.exe
Token: SeSecurityPrivilege	1784	wmic.exe
Token: SeTakeOwnershipPrivilege	1784	wmic.exe
Token: SeLoadDriverPrivilege	1784	wmic.exe
Token: SeSystemProfilePrivilege	1784	wmic.exe
Token: SeSystemtimePrivilege	1784	wmic.exe
Token: SeProfSingleProcessPrivilege	1784	wmic.exe
Token: SeIncBasePriorityPrivilege	1784	wmic.exe
Token: SeCreatePagefilePrivilege	1784	wmic.exe
Token: SeBackupPrivilege	1784	wmic.exe
Token: SeRestorePrivilege	1784	wmic.exe
Token: SeShutdownPrivilege	1784	wmic.exe
Token: SeDebugPrivilege	1784	wmic.exe
Token: SeSystemEnvironmentPrivilege	1784	wmic.exe
Token: SeRemoteShutdownPrivilege	1784	wmic.exe
Token: SeUndockPrivilege	1784	wmic.exe
Token: SeManageVolumePrivilege	1784	wmic.exe
Token: 33	1784	wmic.exe
Token: 34	1784	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2140 wrote to memory of 3032	2140	Venomer-Rat.exe	29
PID 2140 wrote to memory of 3032	2140	Venomer-Rat.exe	29
PID 2140 wrote to memory of 3032	2140	Venomer-Rat.exe	29
PID 2140 wrote to memory of 2636	2140	Venomer-Rat.exe	31
PID 2140 wrote to memory of 2636	2140	Venomer-Rat.exe	31
PID 2140 wrote to memory of 2636	2140	Venomer-Rat.exe	31
PID 2140 wrote to memory of 2668	2140	Venomer-Rat.exe	33
PID 2140 wrote to memory of 2668	2140	Venomer-Rat.exe	33
PID 2140 wrote to memory of 2668	2140	Venomer-Rat.exe	33
PID 2140 wrote to memory of 2624	2140	Venomer-Rat.exe	35
PID 2140 wrote to memory of 2624	2140	Venomer-Rat.exe	35
PID 2140 wrote to memory of 2624	2140	Venomer-Rat.exe	35
PID 2140 wrote to memory of 2504	2140	Venomer-Rat.exe	37
PID 2140 wrote to memory of 2504	2140	Venomer-Rat.exe	37
PID 2140 wrote to memory of 2504	2140	Venomer-Rat.exe	37
PID 2140 wrote to memory of 2408	2140	Venomer-Rat.exe	39
PID 2140 wrote to memory of 2408	2140	Venomer-Rat.exe	39
PID 2140 wrote to memory of 2408	2140	Venomer-Rat.exe	39
PID 2140 wrote to memory of 1784	2140	Venomer-Rat.exe	41
PID 2140 wrote to memory of 1784	2140	Venomer-Rat.exe	41
PID 2140 wrote to memory of 1784	2140	Venomer-Rat.exe	41
PID 2140 wrote to memory of 1520	2140	Venomer-Rat.exe	43
PID 2140 wrote to memory of 1520	2140	Venomer-Rat.exe	43
PID 2140 wrote to memory of 1520	2140	Venomer-Rat.exe	43
PID 2140 wrote to memory of 2328	2140	Venomer-Rat.exe	45
PID 2140 wrote to memory of 2328	2140	Venomer-Rat.exe	45
PID 2140 wrote to memory of 2328	2140	Venomer-Rat.exe	45
PID 2140 wrote to memory of 1332	2140	Venomer-Rat.exe	47
PID 2140 wrote to memory of 1332	2140	Venomer-Rat.exe	47
PID 2140 wrote to memory of 1332	2140	Venomer-Rat.exe	47
PID 2140 wrote to memory of 2776	2140	Venomer-Rat.exe	49
PID 2140 wrote to memory of 2776	2140	Venomer-Rat.exe	49
PID 2140 wrote to memory of 2776	2140	Venomer-Rat.exe	49
PID 2140 wrote to memory of 2084	2140	Venomer-Rat.exe	51
PID 2140 wrote to memory of 2084	2140	Venomer-Rat.exe	51
PID 2140 wrote to memory of 2084	2140	Venomer-Rat.exe	51
PID 2084 wrote to memory of 2876	2084	cmd.exe	53
PID 2084 wrote to memory of 2876	2084	cmd.exe	53
PID 2084 wrote to memory of 2876	2084	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2636	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Venomer-Rat.exe
"C:\Users\Admin\AppData\Local\Temp\Venomer-Rat.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2140
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3032
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Venomer-Rat.exe"
  2⤵
  - Views/modifies file attributes
  PID:2636
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Venomer-Rat.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2668
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2504
- 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:2408
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1784
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1520
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2328
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2776
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Venomer-Rat.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2876

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1948

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

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

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Downloads

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

Filesize
7KB

MD5
2ab4aab30fa04b699080eecf2f33580d

SHA1
b231357a5c108c0ccfb3fb1932a05c0f559fb1ea

SHA256
38abcf3d9c960acb1bcfeb3cbb05d82179e5a73772004db7f0cab90521a63742

SHA512
0e89f7d9521239eb7112a7c058607b2c92794ac09307128c7a03511420d768b3d6df63c485e2e2736ca7f7a582449049b0de14189d2017cd70eeb2548c7994b1

Download Submit
memory/1332-43-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/2140-0-0x000007FEF54A3000-0x000007FEF54A4000-memory.dmp

Filesize
4KB

Download
memory/2140-1-0x0000000000AA0000-0x0000000000AE0000-memory.dmp

Filesize
256KB

Download
memory/2140-2-0x000007FEF54A0000-0x000007FEF5E8C000-memory.dmp

Filesize
9.9MB

Download
memory/2140-47-0x000007FEF54A0000-0x000007FEF5E8C000-memory.dmp

Filesize
9.9MB

Download
memory/2624-14-0x000000001B6D0000-0x000000001B9B2000-memory.dmp

Filesize
2.9MB

Download
memory/2624-15-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/2668-7-0x000000001B590000-0x000000001B872000-memory.dmp

Filesize
2.9MB

Download
memory/2668-8-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download