umbral | 0506a1b19dc8f17889113566ad1888b13f0aa9e956b8de39a5e55c36cd268b9a

Analysis

max time kernel
93s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-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
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

pid	Process
2016	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

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
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.

flow	ioc
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1304	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
748	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

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

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

description	pid	Process	procid_target
PID 2056 wrote to memory of 1108	2056	Venomer-Rat.exe	88
PID 2056 wrote to memory of 1108	2056	Venomer-Rat.exe	88
PID 2056 wrote to memory of 4316	2056	Venomer-Rat.exe	91
PID 2056 wrote to memory of 4316	2056	Venomer-Rat.exe	91
PID 2056 wrote to memory of 2016	2056	Venomer-Rat.exe	93
PID 2056 wrote to memory of 2016	2056	Venomer-Rat.exe	93
PID 2056 wrote to memory of 404	2056	Venomer-Rat.exe	95
PID 2056 wrote to memory of 404	2056	Venomer-Rat.exe	95
PID 2056 wrote to memory of 4636	2056	Venomer-Rat.exe	97
PID 2056 wrote to memory of 4636	2056	Venomer-Rat.exe	97
PID 2056 wrote to memory of 4312	2056	Venomer-Rat.exe	99
PID 2056 wrote to memory of 4312	2056	Venomer-Rat.exe	99
PID 2056 wrote to memory of 1964	2056	Venomer-Rat.exe	101
PID 2056 wrote to memory of 1964	2056	Venomer-Rat.exe	101
PID 2056 wrote to memory of 4452	2056	Venomer-Rat.exe	103
PID 2056 wrote to memory of 4452	2056	Venomer-Rat.exe	103
PID 2056 wrote to memory of 4968	2056	Venomer-Rat.exe	105
PID 2056 wrote to memory of 4968	2056	Venomer-Rat.exe	105
PID 2056 wrote to memory of 4372	2056	Venomer-Rat.exe	107
PID 2056 wrote to memory of 4372	2056	Venomer-Rat.exe	107
PID 2056 wrote to memory of 1304	2056	Venomer-Rat.exe	109
PID 2056 wrote to memory of 1304	2056	Venomer-Rat.exe	109
PID 2056 wrote to memory of 1540	2056	Venomer-Rat.exe	111
PID 2056 wrote to memory of 1540	2056	Venomer-Rat.exe	111
PID 1540 wrote to memory of 748	1540	cmd.exe	113
PID 1540 wrote to memory of 748	1540	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

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 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

Replay Monitor

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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