umbral | 72f47523343d7d1ddc198998a6a411686dbfcc5a608314ba400957e369e24ff8

Analysis

max time kernel
92s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
23-07-2024 20:48

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General

Target

Umbral.exe
Size

227KB
MD5

79ad93ed49ecead23248ec08cc51ecfd
SHA1

06340a50ce4fa06499e37070bbd70d6a0f25786f
SHA256

72f47523343d7d1ddc198998a6a411686dbfcc5a608314ba400957e369e24ff8
SHA512

083fff8df6f2d015cc46a05af331d8eb1dd1b91add76a3b47b818a594bc57a80d167cc6fdb2360de489c52b97e8d042abb207e0133d1a446850504c17ab5ffd7
SSDEEP

6144:eloZM9rIkd8g+EtXHkv/iD4n8jjSQPL4yBECDjazBb8e1mCi:IoZOL+EP8n8jjSQPL4yBECDjaNQ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/384-0-0x000001FDC3E00000-0x000001FDC3E40000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4640	powershell.exe
1300	powershell.exe
972	powershell.exe
1044	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
26	discord.com
27	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

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
4836	cmd.exe
1588	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2528	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1588	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1044	powershell.exe
1044	powershell.exe
4640	powershell.exe
4640	powershell.exe
1300	powershell.exe
1300	powershell.exe
3668	powershell.exe
3668	powershell.exe
972	powershell.exe
972	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	384	Umbral.exe
Token: SeDebugPrivilege	1044	powershell.exe
Token: SeDebugPrivilege	4640	powershell.exe
Token: SeDebugPrivilege	1300	powershell.exe
Token: SeDebugPrivilege	3668	powershell.exe
Token: SeIncreaseQuotaPrivilege	876	wmic.exe
Token: SeSecurityPrivilege	876	wmic.exe
Token: SeTakeOwnershipPrivilege	876	wmic.exe
Token: SeLoadDriverPrivilege	876	wmic.exe
Token: SeSystemProfilePrivilege	876	wmic.exe
Token: SeSystemtimePrivilege	876	wmic.exe
Token: SeProfSingleProcessPrivilege	876	wmic.exe
Token: SeIncBasePriorityPrivilege	876	wmic.exe
Token: SeCreatePagefilePrivilege	876	wmic.exe
Token: SeBackupPrivilege	876	wmic.exe
Token: SeRestorePrivilege	876	wmic.exe
Token: SeShutdownPrivilege	876	wmic.exe
Token: SeDebugPrivilege	876	wmic.exe
Token: SeSystemEnvironmentPrivilege	876	wmic.exe
Token: SeRemoteShutdownPrivilege	876	wmic.exe
Token: SeUndockPrivilege	876	wmic.exe
Token: SeManageVolumePrivilege	876	wmic.exe
Token: 33	876	wmic.exe
Token: 34	876	wmic.exe
Token: 35	876	wmic.exe
Token: 36	876	wmic.exe
Token: SeIncreaseQuotaPrivilege	876	wmic.exe
Token: SeSecurityPrivilege	876	wmic.exe
Token: SeTakeOwnershipPrivilege	876	wmic.exe
Token: SeLoadDriverPrivilege	876	wmic.exe
Token: SeSystemProfilePrivilege	876	wmic.exe
Token: SeSystemtimePrivilege	876	wmic.exe
Token: SeProfSingleProcessPrivilege	876	wmic.exe
Token: SeIncBasePriorityPrivilege	876	wmic.exe
Token: SeCreatePagefilePrivilege	876	wmic.exe
Token: SeBackupPrivilege	876	wmic.exe
Token: SeRestorePrivilege	876	wmic.exe
Token: SeShutdownPrivilege	876	wmic.exe
Token: SeDebugPrivilege	876	wmic.exe
Token: SeSystemEnvironmentPrivilege	876	wmic.exe
Token: SeRemoteShutdownPrivilege	876	wmic.exe
Token: SeUndockPrivilege	876	wmic.exe
Token: SeManageVolumePrivilege	876	wmic.exe
Token: 33	876	wmic.exe
Token: 34	876	wmic.exe
Token: 35	876	wmic.exe
Token: 36	876	wmic.exe
Token: SeIncreaseQuotaPrivilege	692	wmic.exe
Token: SeSecurityPrivilege	692	wmic.exe
Token: SeTakeOwnershipPrivilege	692	wmic.exe
Token: SeLoadDriverPrivilege	692	wmic.exe
Token: SeSystemProfilePrivilege	692	wmic.exe
Token: SeSystemtimePrivilege	692	wmic.exe
Token: SeProfSingleProcessPrivilege	692	wmic.exe
Token: SeIncBasePriorityPrivilege	692	wmic.exe
Token: SeCreatePagefilePrivilege	692	wmic.exe
Token: SeBackupPrivilege	692	wmic.exe
Token: SeRestorePrivilege	692	wmic.exe
Token: SeShutdownPrivilege	692	wmic.exe
Token: SeDebugPrivilege	692	wmic.exe
Token: SeSystemEnvironmentPrivilege	692	wmic.exe
Token: SeRemoteShutdownPrivilege	692	wmic.exe
Token: SeUndockPrivilege	692	wmic.exe
Token: SeManageVolumePrivilege	692	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 384 wrote to memory of 2632	384	Umbral.exe	85
PID 384 wrote to memory of 2632	384	Umbral.exe	85
PID 384 wrote to memory of 1044	384	Umbral.exe	87
PID 384 wrote to memory of 1044	384	Umbral.exe	87
PID 384 wrote to memory of 4640	384	Umbral.exe	91
PID 384 wrote to memory of 4640	384	Umbral.exe	91
PID 384 wrote to memory of 1300	384	Umbral.exe	93
PID 384 wrote to memory of 1300	384	Umbral.exe	93
PID 384 wrote to memory of 3668	384	Umbral.exe	95
PID 384 wrote to memory of 3668	384	Umbral.exe	95
PID 384 wrote to memory of 876	384	Umbral.exe	97
PID 384 wrote to memory of 876	384	Umbral.exe	97
PID 384 wrote to memory of 692	384	Umbral.exe	100
PID 384 wrote to memory of 692	384	Umbral.exe	100
PID 384 wrote to memory of 4452	384	Umbral.exe	104
PID 384 wrote to memory of 4452	384	Umbral.exe	104
PID 384 wrote to memory of 972	384	Umbral.exe	106
PID 384 wrote to memory of 972	384	Umbral.exe	106
PID 384 wrote to memory of 2528	384	Umbral.exe	108
PID 384 wrote to memory of 2528	384	Umbral.exe	108
PID 384 wrote to memory of 4836	384	Umbral.exe	111
PID 384 wrote to memory of 4836	384	Umbral.exe	111
PID 4836 wrote to memory of 1588	4836	cmd.exe	113
PID 4836 wrote to memory of 1588	4836	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2632	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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:384
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2632
- 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:1044
- 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:4640
- 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:1300
- 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:3668
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:876
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:692
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4452
- 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:972
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2528
- 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:4836
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1588

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

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
ded10d75f0c158ab3c672f4097f3f414

SHA1
e8eb411226238ee4ec6e8ef69f03171c99d89bc2

SHA256
65523e47057f5b14035e727c71136e7a88f88c8a8956729f9f74be4b7343a5a2

SHA512
ca925e939197b60f954f071bcd1beb98a4f947759b246afa3c50e5525b2cfab3db490bc3ed4cf8e2f2e5452a8b759ecfbc0a4d0ec904b00077b86212888876d5

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_emy4lu3e.vjp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/384-71-0x000001FDC5AB0000-0x000001FDC5ABA000-memory.dmp

Filesize
40KB

Download
memory/384-35-0x000001FDDE640000-0x000001FDDE65E000-memory.dmp

Filesize
120KB

Download
memory/384-90-0x00007FFB99E60000-0x00007FFB9A921000-memory.dmp

Filesize
10.8MB

Download
memory/384-72-0x000001FDC5AE0000-0x000001FDC5AF2000-memory.dmp

Filesize
72KB

Download
memory/384-2-0x00007FFB99E60000-0x00007FFB9A921000-memory.dmp

Filesize
10.8MB

Download
memory/384-33-0x000001FDDE5A0000-0x000001FDDE616000-memory.dmp

Filesize
472KB

Download
memory/384-34-0x000001FDDE520000-0x000001FDDE570000-memory.dmp

Filesize
320KB

Download
memory/384-1-0x00007FFB99E63000-0x00007FFB99E65000-memory.dmp

Filesize
8KB

Download
memory/384-0-0x000001FDC3E00000-0x000001FDC3E40000-memory.dmp

Filesize
256KB

Download
memory/1044-15-0x00007FFB99E60000-0x00007FFB9A921000-memory.dmp

Filesize
10.8MB

Download
memory/1044-12-0x00000205F36C0000-0x00000205F36E2000-memory.dmp

Filesize
136KB

Download
memory/1044-14-0x00007FFB99E60000-0x00007FFB9A921000-memory.dmp

Filesize
10.8MB

Download
memory/1044-13-0x00007FFB99E60000-0x00007FFB9A921000-memory.dmp

Filesize
10.8MB

Download
memory/1044-18-0x00007FFB99E60000-0x00007FFB9A921000-memory.dmp

Filesize
10.8MB

Download