umbral | 3294164d79836fe3765e57e50dd0ac898164ccc049f097fb2deb2725478aa583

Analysis

max time kernel
93s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-08-2024 15:26

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General

Target

Umbral.exe
Size

231KB
MD5

37040bc6e02b555d9062631211678bc9
SHA1

cb2f4548ce9bd51ce42301ffa74130d9c6098ad5
SHA256

3294164d79836fe3765e57e50dd0ac898164ccc049f097fb2deb2725478aa583
SHA512

e5db52931152bef14e1dda82288a1f4265d79c4c4ad08f143994b2b60b2b530dfbcdcb1468bd70e5799a55b2a4f02565249e0d41944032bbd43a296757d9754c
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD4FxEe9rI8jB67NokR4cb8e1mtqpui:joZtL+EP8FxEe9rI8jB67NokRxuqR

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3032-0-0x0000021680DD0000-0x0000021680E10000-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
2716	powershell.exe
2584	powershell.exe
2408	powershell.exe
4960	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	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
22	discord.com
21	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
5	ip-api.com

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
888	cmd.exe
2564	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1732	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2564	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3032	Umbral.exe
2716	powershell.exe
2716	powershell.exe
2584	powershell.exe
2584	powershell.exe
2408	powershell.exe
2408	powershell.exe
2980	powershell.exe
2980	powershell.exe
4960	powershell.exe
4960	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3344	wmic.exe
Token: SeSecurityPrivilege	3344	wmic.exe
Token: SeTakeOwnershipPrivilege	3344	wmic.exe
Token: SeLoadDriverPrivilege	3344	wmic.exe
Token: SeSystemProfilePrivilege	3344	wmic.exe
Token: SeSystemtimePrivilege	3344	wmic.exe
Token: SeProfSingleProcessPrivilege	3344	wmic.exe
Token: SeIncBasePriorityPrivilege	3344	wmic.exe
Token: SeCreatePagefilePrivilege	3344	wmic.exe
Token: SeBackupPrivilege	3344	wmic.exe
Token: SeRestorePrivilege	3344	wmic.exe
Token: SeShutdownPrivilege	3344	wmic.exe
Token: SeDebugPrivilege	3344	wmic.exe
Token: SeSystemEnvironmentPrivilege	3344	wmic.exe
Token: SeRemoteShutdownPrivilege	3344	wmic.exe
Token: SeUndockPrivilege	3344	wmic.exe
Token: SeManageVolumePrivilege	3344	wmic.exe
Token: 33	3344	wmic.exe
Token: 34	3344	wmic.exe
Token: 35	3344	wmic.exe
Token: 36	3344	wmic.exe
Token: SeIncreaseQuotaPrivilege	3344	wmic.exe
Token: SeSecurityPrivilege	3344	wmic.exe
Token: SeTakeOwnershipPrivilege	3344	wmic.exe
Token: SeLoadDriverPrivilege	3344	wmic.exe
Token: SeSystemProfilePrivilege	3344	wmic.exe
Token: SeSystemtimePrivilege	3344	wmic.exe
Token: SeProfSingleProcessPrivilege	3344	wmic.exe
Token: SeIncBasePriorityPrivilege	3344	wmic.exe
Token: SeCreatePagefilePrivilege	3344	wmic.exe
Token: SeBackupPrivilege	3344	wmic.exe
Token: SeRestorePrivilege	3344	wmic.exe
Token: SeShutdownPrivilege	3344	wmic.exe
Token: SeDebugPrivilege	3344	wmic.exe
Token: SeSystemEnvironmentPrivilege	3344	wmic.exe
Token: SeRemoteShutdownPrivilege	3344	wmic.exe
Token: SeUndockPrivilege	3344	wmic.exe
Token: SeManageVolumePrivilege	3344	wmic.exe
Token: 33	3344	wmic.exe
Token: 34	3344	wmic.exe
Token: 35	3344	wmic.exe
Token: 36	3344	wmic.exe
Token: SeDebugPrivilege	2716	powershell.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeDebugPrivilege	2408	powershell.exe
Token: SeDebugPrivilege	2980	powershell.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

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 3344	3032	Umbral.exe	88
PID 3032 wrote to memory of 3344	3032	Umbral.exe	88
PID 3032 wrote to memory of 2232	3032	Umbral.exe	91
PID 3032 wrote to memory of 2232	3032	Umbral.exe	91
PID 3032 wrote to memory of 2716	3032	Umbral.exe	93
PID 3032 wrote to memory of 2716	3032	Umbral.exe	93
PID 3032 wrote to memory of 2584	3032	Umbral.exe	95
PID 3032 wrote to memory of 2584	3032	Umbral.exe	95
PID 3032 wrote to memory of 2408	3032	Umbral.exe	97
PID 3032 wrote to memory of 2408	3032	Umbral.exe	97
PID 3032 wrote to memory of 2980	3032	Umbral.exe	99
PID 3032 wrote to memory of 2980	3032	Umbral.exe	99
PID 3032 wrote to memory of 232	3032	Umbral.exe	101
PID 3032 wrote to memory of 232	3032	Umbral.exe	101
PID 3032 wrote to memory of 2560	3032	Umbral.exe	103
PID 3032 wrote to memory of 2560	3032	Umbral.exe	103
PID 3032 wrote to memory of 4936	3032	Umbral.exe	105
PID 3032 wrote to memory of 4936	3032	Umbral.exe	105
PID 3032 wrote to memory of 4960	3032	Umbral.exe	107
PID 3032 wrote to memory of 4960	3032	Umbral.exe	107
PID 3032 wrote to memory of 1732	3032	Umbral.exe	109
PID 3032 wrote to memory of 1732	3032	Umbral.exe	109
PID 3032 wrote to memory of 888	3032	Umbral.exe	111
PID 3032 wrote to memory of 888	3032	Umbral.exe	111
PID 888 wrote to memory of 2564	888	cmd.exe	113
PID 888 wrote to memory of 2564	888	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2232	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3344
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2232
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2716
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2584
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2408
- 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:2980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:232
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2560
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4936
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4960
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1732
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:888
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2564

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

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
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
28ef595a6cc9f47b8eccb22d4ed50d6c

SHA1
4335de707324b15eba79017938c3da2752d3eea5

SHA256
3abd14d4fe7b5697b2fa84993e7183f4fd2580be5b4e5150da15ddda5a9560b9

SHA512
687b7849faa62a4dabc240b573afa163f0cda9a80be61cebe28ef1461777744d73b465ac92d065093228068540846e79c899445057f5b906f9b9fa9868132208

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

Filesize
1KB

MD5
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

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

Filesize
1KB

MD5
92382908106bf04aac6575ae0e55073f

SHA1
b164dd606b60ada42fe843963f95e14e92d5d86a

SHA256
1332dc373efa610424b48ae9955247275f4f94cfeecec93a5121784ed8d6b3db

SHA512
d6ee3e3776f683b2a4eaf4fd92e2cd2b9412d85fb57556130d8cabf52e180fb17b5dcdfec9ccd0b3b80bed2816c0bd2d25de35580b859e7799b7cb61071edb3f

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_biaotwpd.e1h.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2716-3-0x000001BCAE5F0000-0x000001BCAE612000-memory.dmp

Filesize
136KB

Download
memory/2716-13-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

Filesize
10.8MB

Download
memory/2716-14-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

Filesize
10.8MB

Download
memory/2716-15-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

Filesize
10.8MB

Download
memory/2716-18-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

Filesize
10.8MB

Download
memory/3032-34-0x000002169B570000-0x000002169B5C0000-memory.dmp

Filesize
320KB

Download
memory/3032-33-0x000002169B4F0000-0x000002169B566000-memory.dmp

Filesize
472KB

Download
memory/3032-35-0x000002169B5C0000-0x000002169B5DE000-memory.dmp

Filesize
120KB

Download
memory/3032-1-0x00007FF8FF573000-0x00007FF8FF575000-memory.dmp

Filesize
8KB

Download
memory/3032-0-0x0000021680DD0000-0x0000021680E10000-memory.dmp

Filesize
256KB

Download
memory/3032-71-0x000002169B490000-0x000002169B49A000-memory.dmp

Filesize
40KB

Download
memory/3032-72-0x000002169B4C0000-0x000002169B4D2000-memory.dmp

Filesize
72KB

Download
memory/3032-2-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

Filesize
10.8MB

Download
memory/3032-90-0x00007FF8FF570000-0x00007FF900031000-memory.dmp

Filesize
10.8MB

Download