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
behavioral2/memory/2056-0-0x0000021698190000-0x00000216981D0000-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

2016 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
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

22 discord.com
23 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

5 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

1304 wmic.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

748 PING.EXE

pid	process
2016	powershell.exe

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

flow	ioc
22	discord.com
23	discord.com

flow	ioc
5	ip-api.com

pid	process
1304	wmic.exe

pid	process
748	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

Processes:

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

pid	process
2056	Venomer-Rat.exe
2016	powershell.exe
2016	powershell.exe
404	powershell.exe
404	powershell.exe
4636	powershell.exe
4636	powershell.exe
4312	powershell.exe
4312	powershell.exe
4372	powershell.exe
4372	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes:

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

description	pid	process
Token: SeDebugPrivilege	2056	Venomer-Rat.exe
Token: SeIncreaseQuotaPrivilege	1108	wmic.exe
Token: SeSecurityPrivilege	1108	wmic.exe
Token: SeTakeOwnershipPrivilege	1108	wmic.exe
Token: SeLoadDriverPrivilege	1108	wmic.exe
Token: SeSystemProfilePrivilege	1108	wmic.exe
Token: SeSystemtimePrivilege	1108	wmic.exe
Token: SeProfSingleProcessPrivilege	1108	wmic.exe
Token: SeIncBasePriorityPrivilege	1108	wmic.exe
Token: SeCreatePagefilePrivilege	1108	wmic.exe
Token: SeBackupPrivilege	1108	wmic.exe
Token: SeRestorePrivilege	1108	wmic.exe
Token: SeShutdownPrivilege	1108	wmic.exe
Token: SeDebugPrivilege	1108	wmic.exe
Token: SeSystemEnvironmentPrivilege	1108	wmic.exe
Token: SeRemoteShutdownPrivilege	1108	wmic.exe
Token: SeUndockPrivilege	1108	wmic.exe
Token: SeManageVolumePrivilege	1108	wmic.exe
Token: 33	1108	wmic.exe
Token: 34	1108	wmic.exe
Token: 35	1108	wmic.exe
Token: 36	1108	wmic.exe
Token: SeIncreaseQuotaPrivilege	1108	wmic.exe
Token: SeSecurityPrivilege	1108	wmic.exe
Token: SeTakeOwnershipPrivilege	1108	wmic.exe
Token: SeLoadDriverPrivilege	1108	wmic.exe
Token: SeSystemProfilePrivilege	1108	wmic.exe
Token: SeSystemtimePrivilege	1108	wmic.exe
Token: SeProfSingleProcessPrivilege	1108	wmic.exe
Token: SeIncBasePriorityPrivilege	1108	wmic.exe
Token: SeCreatePagefilePrivilege	1108	wmic.exe
Token: SeBackupPrivilege	1108	wmic.exe
Token: SeRestorePrivilege	1108	wmic.exe
Token: SeShutdownPrivilege	1108	wmic.exe
Token: SeDebugPrivilege	1108	wmic.exe
Token: SeSystemEnvironmentPrivilege	1108	wmic.exe
Token: SeRemoteShutdownPrivilege	1108	wmic.exe
Token: SeUndockPrivilege	1108	wmic.exe
Token: SeManageVolumePrivilege	1108	wmic.exe
Token: 33	1108	wmic.exe
Token: 34	1108	wmic.exe
Token: 35	1108	wmic.exe
Token: 36	1108	wmic.exe
Token: SeDebugPrivilege	2016	powershell.exe
Token: SeDebugPrivilege	404	powershell.exe
Token: SeDebugPrivilege	4636	powershell.exe
Token: SeDebugPrivilege	4312	powershell.exe
Token: SeIncreaseQuotaPrivilege	1964	wmic.exe
Token: SeSecurityPrivilege	1964	wmic.exe
Token: SeTakeOwnershipPrivilege	1964	wmic.exe
Token: SeLoadDriverPrivilege	1964	wmic.exe
Token: SeSystemProfilePrivilege	1964	wmic.exe
Token: SeSystemtimePrivilege	1964	wmic.exe
Token: SeProfSingleProcessPrivilege	1964	wmic.exe
Token: SeIncBasePriorityPrivilege	1964	wmic.exe
Token: SeCreatePagefilePrivilege	1964	wmic.exe
Token: SeBackupPrivilege	1964	wmic.exe
Token: SeRestorePrivilege	1964	wmic.exe
Token: SeShutdownPrivilege	1964	wmic.exe
Token: SeDebugPrivilege	1964	wmic.exe
Token: SeSystemEnvironmentPrivilege	1964	wmic.exe
Token: SeRemoteShutdownPrivilege	1964	wmic.exe
Token: SeUndockPrivilege	1964	wmic.exe
Token: SeManageVolumePrivilege	1964	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

Venomer-Rat.execmd.exe

description	pid	process	target process
PID 2056 wrote to memory of 1108	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 1108	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 4316	2056	Venomer-Rat.exe	attrib.exe
PID 2056 wrote to memory of 4316	2056	Venomer-Rat.exe	attrib.exe
PID 2056 wrote to memory of 2016	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 2016	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 404	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 404	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 4636	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 4636	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 4312	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 4312	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 1964	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 1964	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 4452	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 4452	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 4968	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 4968	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 4372	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 4372	2056	Venomer-Rat.exe	powershell.exe
PID 2056 wrote to memory of 1304	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 1304	2056	Venomer-Rat.exe	wmic.exe
PID 2056 wrote to memory of 1540	2056	Venomer-Rat.exe	cmd.exe
PID 2056 wrote to memory of 1540	2056	Venomer-Rat.exe	cmd.exe
PID 1540 wrote to memory of 748	1540	cmd.exe	PING.EXE
PID 1540 wrote to memory of 748	1540	cmd.exe	PING.EXE

Views/modifies file attributes 1 TTPs 1 IoCs
evasion

Hidden Files and Directories
T1564.001

Processes:

attrib.exe

pid process

4316 attrib.exe

pid	process
4316	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:2056

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1108

C:\Windows\SYSTEM32\attrib.exe
"attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Venomer-Rat.exe"
2⤵
- Views/modifies file attributes
PID:4316

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:2016

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:404

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:4636

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:4312

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" os get Caption
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:1964

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" computersystem get totalphysicalmemory
2⤵
PID:4452

C:\Windows\System32\Wbem\wmic.exe
"wmic.exe" csproduct get uuid
2⤵
PID:4968

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:4372

C:\Windows\System32\Wbem\wmic.exe
"wmic" path win32_VideoController get name
2⤵
- Detects videocard installed
PID:1304

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⤵
- Suspicious use of WriteProcessMemory
PID:1540

C:\Windows\system32\PING.EXE
ping localhost
3⤵
- Runs ping.exe
PID:748

Network

MITRE ATT&CK Matrix ATT&CK v13

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

System Information Discovery

1

T1082

Remote System Discovery

1

T1018

Lateral Movement

Collection

Data from Local System

1

T1005

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
a43e653ffb5ab07940f4bdd9cc8fade4

SHA1
af43d04e3427f111b22dc891c5c7ee8a10ac4123

SHA256
c4c53abb13e99475aebfbe9fec7a8fead81c14c80d9dcc2b81375304f3a683fe

SHA512
62a97e95e1f19a8d4302847110dae44f469877eed6aa8ea22345c6eb25ee220e7d310fa0b7ec5df42356815421c0af7c46a0f1fee8933cc446641800eda6cd1b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
76692775e4781f0c9f0092f5804cfdb1

SHA1
6740e4e4110028c62282ee1e7eb8be576a2bc23a

SHA256
0c451ff3823450d544066237cbfb08556b7ca36c4a0ea085055f69ab35795b00

SHA512
6e0731e3736594d9e86da2fc33e08a663f29100074cc8d46e2716123c946b9eb150c804c7cf8428cac631e1cff984663d41ce3b5e1e77965bd8e2ecf0742af34

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
948B

MD5
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
1KB

MD5
4bc57801806b2fc81aab7af5a05b9580

SHA1
b40d09af4d82edf546f2a4e570b66bc7429756f1

SHA256
8b9e01d834815bd4a69152c70e0250e48f2b2af6665c2a57458bf89b011291fa

SHA512
c7c5a7eec6af15ae5c754d1549c5766a709770bdf43488e30617f7efdb5c8cee54f276397e76fb719622b538458947ce4c5c8cbe2490dc79bc9d14fe0e3e81f1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mpwldaza.g2w.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2016-12-0x0000018A654C0000-0x0000018A654E2000-memory.dmp

Filesize
136KB

Download
memory/2016-13-0x00007FFE4B140000-0x00007FFE4BC01000-memory.dmp

Filesize
10.8MB

Download
memory/2016-14-0x00007FFE4B140000-0x00007FFE4BC01000-memory.dmp

Filesize
10.8MB

Download
memory/2016-15-0x00007FFE4B140000-0x00007FFE4BC01000-memory.dmp

Filesize
10.8MB

Download
memory/2016-18-0x00007FFE4B140000-0x00007FFE4BC01000-memory.dmp

Filesize
10.8MB

Download
memory/2056-34-0x00000216B2950000-0x00000216B29A0000-memory.dmp

Filesize
320KB

Download
memory/2056-33-0x00000216B28D0000-0x00000216B2946000-memory.dmp

Filesize
472KB

Download
memory/2056-35-0x00000216B2850000-0x00000216B286E000-memory.dmp

Filesize
120KB

Download
memory/2056-0-0x0000021698190000-0x00000216981D0000-memory.dmp

Filesize
256KB

Download
memory/2056-1-0x00007FFE4B143000-0x00007FFE4B145000-memory.dmp

Filesize
8KB

Download
memory/2056-72-0x00000216B28B0000-0x00000216B28C2000-memory.dmp

Filesize
72KB

Download
memory/2056-71-0x00000216B2880000-0x00000216B288A000-memory.dmp

Filesize
40KB

Download
memory/2056-2-0x00007FFE4B140000-0x00007FFE4BC01000-memory.dmp

Filesize
10.8MB

Download
memory/2056-90-0x00007FFE4B140000-0x00007FFE4BC01000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads