umbral | 084d8dae75296d5278702a13359c8869ea6919de5e0f3e939d0e786771238614

Analysis

max time kernel
97s
max time network
121s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
22-08-2024 22:58

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General

Target

cbe01fe4646cb0bf553e56fab6049ea0N.exe
Size

332KB
MD5

cbe01fe4646cb0bf553e56fab6049ea0
SHA1

74323c61e5e6af54a185db9055a63b58164a0875
SHA256

084d8dae75296d5278702a13359c8869ea6919de5e0f3e939d0e786771238614
SHA512

231f36ca6f9904dee27d8bd663f2210686f1b999341bf5da4aa6726785cbfa78df9af9ca2095cc918682ec215e92509beb34ea294b88eeabfa74f263ec801bc3
SSDEEP

6144:tqS31vVrANegm9Wv3IOm+I3Wy6VlWd40pKr/zZ5wBJqsycOPAahF:4S7PWvSR3WTVl50wrN5wDq//A

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x00060000000226f8-7.dat	family_umbral
behavioral2/memory/4056-17-0x000001F20C9E0000-0x000001F20CA20000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1284	powershell.exe
4052	powershell.exe
4476	powershell.exe
3888	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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	cbe01fe4646cb0bf553e56fab6049ea0N.exe

Executes dropped EXE 2 IoCs

pid	Process
4056	Umbral.exe
3476	svchost.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
24	ip-api.com

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
3156	cmd.exe
2712	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4716	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2712	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4056	Umbral.exe
1284	powershell.exe
1284	powershell.exe
4052	powershell.exe
4052	powershell.exe
4476	powershell.exe
4476	powershell.exe
4208	powershell.exe
4208	powershell.exe
3888	powershell.exe
3888	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4056	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2936	wmic.exe
Token: SeSecurityPrivilege	2936	wmic.exe
Token: SeTakeOwnershipPrivilege	2936	wmic.exe
Token: SeLoadDriverPrivilege	2936	wmic.exe
Token: SeSystemProfilePrivilege	2936	wmic.exe
Token: SeSystemtimePrivilege	2936	wmic.exe
Token: SeProfSingleProcessPrivilege	2936	wmic.exe
Token: SeIncBasePriorityPrivilege	2936	wmic.exe
Token: SeCreatePagefilePrivilege	2936	wmic.exe
Token: SeBackupPrivilege	2936	wmic.exe
Token: SeRestorePrivilege	2936	wmic.exe
Token: SeShutdownPrivilege	2936	wmic.exe
Token: SeDebugPrivilege	2936	wmic.exe
Token: SeSystemEnvironmentPrivilege	2936	wmic.exe
Token: SeRemoteShutdownPrivilege	2936	wmic.exe
Token: SeUndockPrivilege	2936	wmic.exe
Token: SeManageVolumePrivilege	2936	wmic.exe
Token: 33	2936	wmic.exe
Token: 34	2936	wmic.exe
Token: 35	2936	wmic.exe
Token: 36	2936	wmic.exe
Token: SeIncreaseQuotaPrivilege	2936	wmic.exe
Token: SeSecurityPrivilege	2936	wmic.exe
Token: SeTakeOwnershipPrivilege	2936	wmic.exe
Token: SeLoadDriverPrivilege	2936	wmic.exe
Token: SeSystemProfilePrivilege	2936	wmic.exe
Token: SeSystemtimePrivilege	2936	wmic.exe
Token: SeProfSingleProcessPrivilege	2936	wmic.exe
Token: SeIncBasePriorityPrivilege	2936	wmic.exe
Token: SeCreatePagefilePrivilege	2936	wmic.exe
Token: SeBackupPrivilege	2936	wmic.exe
Token: SeRestorePrivilege	2936	wmic.exe
Token: SeShutdownPrivilege	2936	wmic.exe
Token: SeDebugPrivilege	2936	wmic.exe
Token: SeSystemEnvironmentPrivilege	2936	wmic.exe
Token: SeRemoteShutdownPrivilege	2936	wmic.exe
Token: SeUndockPrivilege	2936	wmic.exe
Token: SeManageVolumePrivilege	2936	wmic.exe
Token: 33	2936	wmic.exe
Token: 34	2936	wmic.exe
Token: 35	2936	wmic.exe
Token: 36	2936	wmic.exe
Token: SeDebugPrivilege	1284	powershell.exe
Token: SeDebugPrivilege	4052	powershell.exe
Token: SeDebugPrivilege	4476	powershell.exe
Token: SeDebugPrivilege	4208	powershell.exe
Token: SeIncreaseQuotaPrivilege	1976	wmic.exe
Token: SeSecurityPrivilege	1976	wmic.exe
Token: SeTakeOwnershipPrivilege	1976	wmic.exe
Token: SeLoadDriverPrivilege	1976	wmic.exe
Token: SeSystemProfilePrivilege	1976	wmic.exe
Token: SeSystemtimePrivilege	1976	wmic.exe
Token: SeProfSingleProcessPrivilege	1976	wmic.exe
Token: SeIncBasePriorityPrivilege	1976	wmic.exe
Token: SeCreatePagefilePrivilege	1976	wmic.exe
Token: SeBackupPrivilege	1976	wmic.exe
Token: SeRestorePrivilege	1976	wmic.exe
Token: SeShutdownPrivilege	1976	wmic.exe
Token: SeDebugPrivilege	1976	wmic.exe
Token: SeSystemEnvironmentPrivilege	1976	wmic.exe
Token: SeRemoteShutdownPrivilege	1976	wmic.exe
Token: SeUndockPrivilege	1976	wmic.exe
Token: SeManageVolumePrivilege	1976	wmic.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 4444 wrote to memory of 4056	4444	cbe01fe4646cb0bf553e56fab6049ea0N.exe	90
PID 4444 wrote to memory of 4056	4444	cbe01fe4646cb0bf553e56fab6049ea0N.exe	90
PID 4444 wrote to memory of 3476	4444	cbe01fe4646cb0bf553e56fab6049ea0N.exe	91
PID 4444 wrote to memory of 3476	4444	cbe01fe4646cb0bf553e56fab6049ea0N.exe	91
PID 4056 wrote to memory of 2936	4056	Umbral.exe	95
PID 4056 wrote to memory of 2936	4056	Umbral.exe	95
PID 4056 wrote to memory of 2712	4056	Umbral.exe	97
PID 4056 wrote to memory of 2712	4056	Umbral.exe	97
PID 4056 wrote to memory of 1284	4056	Umbral.exe	99
PID 4056 wrote to memory of 1284	4056	Umbral.exe	99
PID 4056 wrote to memory of 4052	4056	Umbral.exe	102
PID 4056 wrote to memory of 4052	4056	Umbral.exe	102
PID 4056 wrote to memory of 4476	4056	Umbral.exe	104
PID 4056 wrote to memory of 4476	4056	Umbral.exe	104
PID 4056 wrote to memory of 4208	4056	Umbral.exe	106
PID 4056 wrote to memory of 4208	4056	Umbral.exe	106
PID 4056 wrote to memory of 1976	4056	Umbral.exe	108
PID 4056 wrote to memory of 1976	4056	Umbral.exe	108
PID 4056 wrote to memory of 4284	4056	Umbral.exe	110
PID 4056 wrote to memory of 4284	4056	Umbral.exe	110
PID 4056 wrote to memory of 2224	4056	Umbral.exe	113
PID 4056 wrote to memory of 2224	4056	Umbral.exe	113
PID 4056 wrote to memory of 3888	4056	Umbral.exe	115
PID 4056 wrote to memory of 3888	4056	Umbral.exe	115
PID 4056 wrote to memory of 4716	4056	Umbral.exe	117
PID 4056 wrote to memory of 4716	4056	Umbral.exe	117
PID 4056 wrote to memory of 3156	4056	Umbral.exe	119
PID 4056 wrote to memory of 3156	4056	Umbral.exe	119
PID 3156 wrote to memory of 2712	3156	cmd.exe	121
PID 3156 wrote to memory of 2712	3156	cmd.exe	121

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2712	attrib.exe

C:\Users\Admin\AppData\Local\Temp\cbe01fe4646cb0bf553e56fab6049ea0N.exe
"C:\Users\Admin\AppData\Local\Temp\cbe01fe4646cb0bf553e56fab6049ea0N.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4444
- 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:4056
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2936
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
    3⤵
    - Views/modifies file attributes
    PID:2712
- - 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:1284
- - 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⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4052
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4476
- - 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:4208
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:1976
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:4284
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:2224
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:3888
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:4716
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:3156
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2712
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Executes dropped EXE
  PID:3476

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
69b4f192a560ac3dec47b5fdd888038a

SHA1
d8ac8c81566453df1c46933e53cd8ada8c8a9ddc

SHA256
82a3be32dd488d1cb8f5ad472a5b28d4786f959a523ace5a695d1c0e5488efe9

SHA512
e4bf83c9983c91710bc6cdbb5b049b2737f6333e02ed0109a42ab59ef7c0de7d40dd42439c865e792a69e98d026c4d5a9491786ce03ff530fb94a717e907c495

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

Filesize
944B

MD5
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
948B

MD5
1a58f982c18490e622e00d4eb75ace5a

SHA1
60c30527b74659ecf09089a5a7c02a1df9a71b65

SHA256
4b7f800c0dea209162cc86627983993127eb20e3f8616646c41cb3ce15d9b39d

SHA512
ddab516a967783c5951717853aa5b3ef6dd5b442db50092888b2e7f3179fc68120fcde69a08d6ab280740eaadb6eadfc758c3118b52706f869e48ac1aebda480

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

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
231KB

MD5
a733fa354827ee6841d92540f7031823

SHA1
12d0420484d4aee5945633298824003c1715815a

SHA256
9da608bc82962c952329648689186ab278007ec0895ce14d136dd0cc48eddc34

SHA512
ce699c379824cf4134cc134b9d803fe6cd7b2e3ab9a79af8ddd8f95713ffe67f96ab2fd04310f4700715bf9db2d1a8a0699bf916f6405fdcf6c66789e9764832

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ky4vd5x3.tpq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
479KB

MD5
dd6cec99223a8139819a04b08a53ef6a

SHA1
7941a00b799f614af2d212322304ed3c403cdc6b

SHA256
8f541cf02aa94b2d9a9f6c8ef1cd88ed56211394ec209d12a48b3507846ef65d

SHA512
d18b8d4ca61c35678ef220f90e09d2a3dea36beb46b76aaf63605c521ffcc34d77e3c1a7ad323f749edf4b0749da3eaf80b7b3ea50af5eeaae5d96ba3cb3aff7

Download Submit
memory/1284-38-0x0000027571350000-0x0000027571372000-memory.dmp

Filesize
136KB

Download
memory/3476-26-0x00000000008C0000-0x000000000093E000-memory.dmp

Filesize
504KB

Download
memory/3476-32-0x00007FFF447A0000-0x00007FFF45261000-memory.dmp

Filesize
10.8MB

Download
memory/3476-29-0x00007FFF447A0000-0x00007FFF45261000-memory.dmp

Filesize
10.8MB

Download
memory/4056-17-0x000001F20C9E0000-0x000001F20CA20000-memory.dmp

Filesize
256KB

Download
memory/4056-28-0x00007FFF447A0000-0x00007FFF45261000-memory.dmp

Filesize
10.8MB

Download
memory/4056-59-0x000001F2271B0000-0x000001F227226000-memory.dmp

Filesize
472KB

Download
memory/4056-60-0x000001F227230000-0x000001F227280000-memory.dmp

Filesize
320KB

Download
memory/4056-61-0x000001F20D000000-0x000001F20D01E000-memory.dmp

Filesize
120KB

Download
memory/4056-97-0x000001F20E770000-0x000001F20E77A000-memory.dmp

Filesize
40KB

Download
memory/4056-98-0x000001F227130000-0x000001F227142000-memory.dmp

Filesize
72KB

Download
memory/4056-116-0x00007FFF447A0000-0x00007FFF45261000-memory.dmp

Filesize
10.8MB

Download
memory/4444-0-0x00007FFF447A3000-0x00007FFF447A5000-memory.dmp

Filesize
8KB

Download
memory/4444-30-0x00007FFF447A0000-0x00007FFF45261000-memory.dmp

Filesize
10.8MB

Download
memory/4444-3-0x00007FFF447A0000-0x00007FFF45261000-memory.dmp

Filesize
10.8MB

Download
memory/4444-1-0x0000000000E60000-0x0000000000EBA000-memory.dmp

Filesize
360KB

Download