umbral | 0506a1b19dc8f17889113566ad1888b13f0aa9e956b8de39a5e55c36cd268b9a

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

Processes:

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

Processes:

powershell.exe

pid process

2668 powershell.exe
Drops file in Drivers directory 1 IoCs

Processes:

Venomer-Rat.exe

description ioc process

File opened for modification C:\Windows\System32\drivers\etc\hosts Venomer-Rat.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

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

Processes:

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.

Processes:

flow ioc

4 ip-api.com
Detects videocard installed 1 TTPs 1 IoCs
Uses WMIC.exe to determine videocard installed.

System Information Discovery
T1082

Processes:

wmic.exe

pid process

2776 wmic.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

2876 PING.EXE
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

Venomer-Rat.exepowershell.exepowershell.exepowershell.exepowershell.exepowershell.exe

pid process

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

pid	process
2668	powershell.exe

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

pid	process
2084	cmd.exe

flow	ioc
7	discord.com
8	discord.com

flow	ioc
4	ip-api.com

pid	process
2776	wmic.exe

pid	process
2876	PING.EXE

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

Processes:

Venomer-Rat.exewmic.exepowershell.exepowershell.exepowershell.exepowershell.exewmic.exe

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

Processes:

Venomer-Rat.execmd.exe

description	pid	process	target process
PID 2140 wrote to memory of 3032	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 3032	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 3032	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 2636	2140	Venomer-Rat.exe	attrib.exe
PID 2140 wrote to memory of 2636	2140	Venomer-Rat.exe	attrib.exe
PID 2140 wrote to memory of 2636	2140	Venomer-Rat.exe	attrib.exe
PID 2140 wrote to memory of 2668	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2668	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2668	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2624	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2624	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2624	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2504	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2504	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2504	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2408	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2408	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2408	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 1784	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 1784	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 1784	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 1520	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 1520	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 1520	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 2328	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 2328	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 2328	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 1332	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 1332	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 1332	2140	Venomer-Rat.exe	powershell.exe
PID 2140 wrote to memory of 2776	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 2776	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 2776	2140	Venomer-Rat.exe	wmic.exe
PID 2140 wrote to memory of 2084	2140	Venomer-Rat.exe	cmd.exe
PID 2140 wrote to memory of 2084	2140	Venomer-Rat.exe	cmd.exe
PID 2140 wrote to memory of 2084	2140	Venomer-Rat.exe	cmd.exe
PID 2084 wrote to memory of 2876	2084	cmd.exe	PING.EXE
PID 2084 wrote to memory of 2876	2084	cmd.exe	PING.EXE
PID 2084 wrote to memory of 2876	2084	cmd.exe	PING.EXE

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

2636 attrib.exe

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

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

1

T1564

Hidden Files and Directories

1

T1564.001

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Web Service

1

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
\??\PIPE\srvsvc
MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads