umbral | aa23463d85a070a894711f628356694599b8eeca33e3e3dc161f2ef765932235

Analysis

max time kernel
148s
max time network
151s
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 05:55

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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/0x00070000000234e7-28.dat	family_umbral
behavioral2/memory/4300-36-0x0000019E22330000-0x0000019E22370000-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
4812	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-1-5-21-701583114-2636601053-947405450-1000\Control Panel\International\Geo\Nation	BL-Tools-v2.8.3.exe

Executes dropped EXE 2 IoCs

pid	Process
1396	BLTools 2.8.4 FIX.exe
4300	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
25	discord.com
26	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
17	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1396	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
1968	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2648	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4300	Umbral.exe
4812	powershell.exe
4812	powershell.exe
4200	powershell.exe
4200	powershell.exe
1476	powershell.exe
1476	powershell.exe
3496	powershell.exe
3496	powershell.exe
2004	powershell.exe
2004	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3616	BL-Tools-v2.8.3.exe
Token: SeDebugPrivilege	4300	Umbral.exe
Token: SeIncreaseQuotaPrivilege	232	wmic.exe
Token: SeSecurityPrivilege	232	wmic.exe
Token: SeTakeOwnershipPrivilege	232	wmic.exe
Token: SeLoadDriverPrivilege	232	wmic.exe
Token: SeSystemProfilePrivilege	232	wmic.exe
Token: SeSystemtimePrivilege	232	wmic.exe
Token: SeProfSingleProcessPrivilege	232	wmic.exe
Token: SeIncBasePriorityPrivilege	232	wmic.exe
Token: SeCreatePagefilePrivilege	232	wmic.exe
Token: SeBackupPrivilege	232	wmic.exe
Token: SeRestorePrivilege	232	wmic.exe
Token: SeShutdownPrivilege	232	wmic.exe
Token: SeDebugPrivilege	232	wmic.exe
Token: SeSystemEnvironmentPrivilege	232	wmic.exe
Token: SeRemoteShutdownPrivilege	232	wmic.exe
Token: SeUndockPrivilege	232	wmic.exe
Token: SeManageVolumePrivilege	232	wmic.exe
Token: 33	232	wmic.exe
Token: 34	232	wmic.exe
Token: 35	232	wmic.exe
Token: 36	232	wmic.exe
Token: SeIncreaseQuotaPrivilege	232	wmic.exe
Token: SeSecurityPrivilege	232	wmic.exe
Token: SeTakeOwnershipPrivilege	232	wmic.exe
Token: SeLoadDriverPrivilege	232	wmic.exe
Token: SeSystemProfilePrivilege	232	wmic.exe
Token: SeSystemtimePrivilege	232	wmic.exe
Token: SeProfSingleProcessPrivilege	232	wmic.exe
Token: SeIncBasePriorityPrivilege	232	wmic.exe
Token: SeCreatePagefilePrivilege	232	wmic.exe
Token: SeBackupPrivilege	232	wmic.exe
Token: SeRestorePrivilege	232	wmic.exe
Token: SeShutdownPrivilege	232	wmic.exe
Token: SeDebugPrivilege	232	wmic.exe
Token: SeSystemEnvironmentPrivilege	232	wmic.exe
Token: SeRemoteShutdownPrivilege	232	wmic.exe
Token: SeUndockPrivilege	232	wmic.exe
Token: SeManageVolumePrivilege	232	wmic.exe
Token: 33	232	wmic.exe
Token: 34	232	wmic.exe
Token: 35	232	wmic.exe
Token: 36	232	wmic.exe
Token: SeDebugPrivilege	4812	powershell.exe
Token: SeDebugPrivilege	4200	powershell.exe
Token: SeDebugPrivilege	1476	powershell.exe
Token: SeDebugPrivilege	3496	powershell.exe
Token: SeIncreaseQuotaPrivilege	3244	wmic.exe
Token: SeSecurityPrivilege	3244	wmic.exe
Token: SeTakeOwnershipPrivilege	3244	wmic.exe
Token: SeLoadDriverPrivilege	3244	wmic.exe
Token: SeSystemProfilePrivilege	3244	wmic.exe
Token: SeSystemtimePrivilege	3244	wmic.exe
Token: SeProfSingleProcessPrivilege	3244	wmic.exe
Token: SeIncBasePriorityPrivilege	3244	wmic.exe
Token: SeCreatePagefilePrivilege	3244	wmic.exe
Token: SeBackupPrivilege	3244	wmic.exe
Token: SeRestorePrivilege	3244	wmic.exe
Token: SeShutdownPrivilege	3244	wmic.exe
Token: SeDebugPrivilege	3244	wmic.exe
Token: SeSystemEnvironmentPrivilege	3244	wmic.exe
Token: SeRemoteShutdownPrivilege	3244	wmic.exe
Token: SeUndockPrivilege	3244	wmic.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 3616 wrote to memory of 1396	3616	BL-Tools-v2.8.3.exe	87
PID 3616 wrote to memory of 1396	3616	BL-Tools-v2.8.3.exe	87
PID 3616 wrote to memory of 1396	3616	BL-Tools-v2.8.3.exe	87
PID 3616 wrote to memory of 4300	3616	BL-Tools-v2.8.3.exe	88
PID 3616 wrote to memory of 4300	3616	BL-Tools-v2.8.3.exe	88
PID 4300 wrote to memory of 232	4300	Umbral.exe	89
PID 4300 wrote to memory of 232	4300	Umbral.exe	89
PID 4300 wrote to memory of 3508	4300	Umbral.exe	91
PID 4300 wrote to memory of 3508	4300	Umbral.exe	91
PID 4300 wrote to memory of 4812	4300	Umbral.exe	93
PID 4300 wrote to memory of 4812	4300	Umbral.exe	93
PID 4300 wrote to memory of 4200	4300	Umbral.exe	95
PID 4300 wrote to memory of 4200	4300	Umbral.exe	95
PID 4300 wrote to memory of 1476	4300	Umbral.exe	97
PID 4300 wrote to memory of 1476	4300	Umbral.exe	97
PID 4300 wrote to memory of 3496	4300	Umbral.exe	99
PID 4300 wrote to memory of 3496	4300	Umbral.exe	99
PID 4300 wrote to memory of 3244	4300	Umbral.exe	101
PID 4300 wrote to memory of 3244	4300	Umbral.exe	101
PID 4300 wrote to memory of 2300	4300	Umbral.exe	103
PID 4300 wrote to memory of 2300	4300	Umbral.exe	103
PID 4300 wrote to memory of 4348	4300	Umbral.exe	105
PID 4300 wrote to memory of 4348	4300	Umbral.exe	105
PID 4300 wrote to memory of 2004	4300	Umbral.exe	107
PID 4300 wrote to memory of 2004	4300	Umbral.exe	107
PID 4300 wrote to memory of 1968	4300	Umbral.exe	109
PID 4300 wrote to memory of 1968	4300	Umbral.exe	109
PID 4300 wrote to memory of 1832	4300	Umbral.exe	111
PID 4300 wrote to memory of 1832	4300	Umbral.exe	111
PID 1832 wrote to memory of 2648	1832	cmd.exe	113
PID 1832 wrote to memory of 2648	1832	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3508	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:3616
- 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:1396
- 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:4300
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:232
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
    3⤵
    - Views/modifies file attributes
    PID:3508
- - 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:4812
- - 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:4200
- - 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:1476
- - 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:3496
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3244
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2300
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:4348
- - 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:2004
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:1968
- - 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:1832
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:2648

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
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
ec68f430dd646907595c25a337c6f032

SHA1
7fc35f368450557543feac46f3ec34cd68581811

SHA256
43b31b43ebf535cffbf983420cfc26f0cd0bb8e88b0add85383b458243a36ab5

SHA512
1ab54dd427341ca14d580736d2ec06c91abf1e1b45b5ca982f05c43c5a86a7e64684f3c3eb00f31db89f244027b450a0f5a05c9f954032c58a72f138aab05ed3

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

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
1aefe566d0c19c9e3ddaf9ea005f71c0

SHA1
8d8cfb0d2192706100eb241f38a32b31f03329f1

SHA256
dc85b671f8ebac6cfa68897b1826019925c95a5ec36676fe18ba0085f437905a

SHA512
f22782b33f7990a0783154fbe6d49e03f16c873a3b4c91f1fc5ed76d0e7b88f0df876ccdf007828ba4d9a5f97cb2362f922cbacad03de5804bc8abeb36cb2d09

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_ntvvqoen.kb4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1396-24-0x000000007453E000-0x000000007453F000-memory.dmp

Filesize
4KB

Download
memory/1396-39-0x0000000000110000-0x0000000000830000-memory.dmp

Filesize
7.1MB

Download
memory/1396-63-0x0000000002B30000-0x0000000002B31000-memory.dmp

Filesize
4KB

Download
memory/3616-38-0x00007FFCFB730000-0x00007FFCFC1F1000-memory.dmp

Filesize
10.8MB

Download
memory/3616-0-0x0000000000900000-0x0000000000F6E000-memory.dmp

Filesize
6.4MB

Download
memory/3616-2-0x00007FFCFB730000-0x00007FFCFC1F1000-memory.dmp

Filesize
10.8MB

Download
memory/3616-1-0x00007FFCFB733000-0x00007FFCFB735000-memory.dmp

Filesize
8KB

Download
memory/4300-68-0x0000019E3CAA0000-0x0000019E3CB16000-memory.dmp

Filesize
472KB

Download
memory/4300-69-0x0000019E3CB20000-0x0000019E3CB70000-memory.dmp

Filesize
320KB

Download
memory/4300-70-0x0000019E23FA0000-0x0000019E23FBE000-memory.dmp

Filesize
120KB

Download
memory/4300-37-0x00007FFCFB733000-0x00007FFCFB735000-memory.dmp

Filesize
8KB

Download
memory/4300-106-0x0000019E23FF0000-0x0000019E23FFA000-memory.dmp

Filesize
40KB

Download
memory/4300-107-0x0000019E24020000-0x0000019E24032000-memory.dmp

Filesize
72KB

Download
memory/4300-36-0x0000019E22330000-0x0000019E22370000-memory.dmp

Filesize
256KB

Download
memory/4812-40-0x0000016742470000-0x0000016742492000-memory.dmp

Filesize
136KB

Download