umbral | 78f05b962a93bd4cd6086b6d785c987b18891f3a9e39866a5115c80bbcd51f3c

Analysis

max time kernel
10s
max time network
8s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
23-08-2024 18:43

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General

Target

lsass.exe
Size

231KB
MD5

3593f099b9c3e67320e88a6934eaaa25
SHA1

280da4c122c680ecb0f246c67e3913eb1cc923a1
SHA256

78f05b962a93bd4cd6086b6d785c987b18891f3a9e39866a5115c80bbcd51f3c
SHA512

b3c391e9e652fa8918fe9b7e0f9ee53166840a688b1dffb3dc8d045c879b5f825c0a571c306d98cf2b5c44e88a99e8d8fcfede310f063df506acce09e31ee75c
SSDEEP

6144:5loZM+rIkd8g+EtXHkv/iD4S08Cls8e1mrci:LoZtL+EP8DQ01

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/3060-1-0x0000022665EF0000-0x0000022665F30000-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
1960	powershell.exe
5096	powershell.exe
2064	powershell.exe
2832	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	lsass.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
14	discord.com
20	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

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
3476	cmd.exe
1860	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2012	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1860	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3060	lsass.exe
1960	powershell.exe
1960	powershell.exe
5096	powershell.exe
5096	powershell.exe
2064	powershell.exe
2064	powershell.exe
1432	powershell.exe
1432	powershell.exe
2832	powershell.exe
2832	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3060	lsass.exe
Token: SeIncreaseQuotaPrivilege	1684	wmic.exe
Token: SeSecurityPrivilege	1684	wmic.exe
Token: SeTakeOwnershipPrivilege	1684	wmic.exe
Token: SeLoadDriverPrivilege	1684	wmic.exe
Token: SeSystemProfilePrivilege	1684	wmic.exe
Token: SeSystemtimePrivilege	1684	wmic.exe
Token: SeProfSingleProcessPrivilege	1684	wmic.exe
Token: SeIncBasePriorityPrivilege	1684	wmic.exe
Token: SeCreatePagefilePrivilege	1684	wmic.exe
Token: SeBackupPrivilege	1684	wmic.exe
Token: SeRestorePrivilege	1684	wmic.exe
Token: SeShutdownPrivilege	1684	wmic.exe
Token: SeDebugPrivilege	1684	wmic.exe
Token: SeSystemEnvironmentPrivilege	1684	wmic.exe
Token: SeRemoteShutdownPrivilege	1684	wmic.exe
Token: SeUndockPrivilege	1684	wmic.exe
Token: SeManageVolumePrivilege	1684	wmic.exe
Token: 33	1684	wmic.exe
Token: 34	1684	wmic.exe
Token: 35	1684	wmic.exe
Token: 36	1684	wmic.exe
Token: SeIncreaseQuotaPrivilege	1684	wmic.exe
Token: SeSecurityPrivilege	1684	wmic.exe
Token: SeTakeOwnershipPrivilege	1684	wmic.exe
Token: SeLoadDriverPrivilege	1684	wmic.exe
Token: SeSystemProfilePrivilege	1684	wmic.exe
Token: SeSystemtimePrivilege	1684	wmic.exe
Token: SeProfSingleProcessPrivilege	1684	wmic.exe
Token: SeIncBasePriorityPrivilege	1684	wmic.exe
Token: SeCreatePagefilePrivilege	1684	wmic.exe
Token: SeBackupPrivilege	1684	wmic.exe
Token: SeRestorePrivilege	1684	wmic.exe
Token: SeShutdownPrivilege	1684	wmic.exe
Token: SeDebugPrivilege	1684	wmic.exe
Token: SeSystemEnvironmentPrivilege	1684	wmic.exe
Token: SeRemoteShutdownPrivilege	1684	wmic.exe
Token: SeUndockPrivilege	1684	wmic.exe
Token: SeManageVolumePrivilege	1684	wmic.exe
Token: 33	1684	wmic.exe
Token: 34	1684	wmic.exe
Token: 35	1684	wmic.exe
Token: 36	1684	wmic.exe
Token: SeDebugPrivilege	1960	powershell.exe
Token: SeDebugPrivilege	5096	powershell.exe
Token: SeDebugPrivilege	2064	powershell.exe
Token: SeDebugPrivilege	1432	powershell.exe
Token: SeIncreaseQuotaPrivilege	1332	wmic.exe
Token: SeSecurityPrivilege	1332	wmic.exe
Token: SeTakeOwnershipPrivilege	1332	wmic.exe
Token: SeLoadDriverPrivilege	1332	wmic.exe
Token: SeSystemProfilePrivilege	1332	wmic.exe
Token: SeSystemtimePrivilege	1332	wmic.exe
Token: SeProfSingleProcessPrivilege	1332	wmic.exe
Token: SeIncBasePriorityPrivilege	1332	wmic.exe
Token: SeCreatePagefilePrivilege	1332	wmic.exe
Token: SeBackupPrivilege	1332	wmic.exe
Token: SeRestorePrivilege	1332	wmic.exe
Token: SeShutdownPrivilege	1332	wmic.exe
Token: SeDebugPrivilege	1332	wmic.exe
Token: SeSystemEnvironmentPrivilege	1332	wmic.exe
Token: SeRemoteShutdownPrivilege	1332	wmic.exe
Token: SeUndockPrivilege	1332	wmic.exe
Token: SeManageVolumePrivilege	1332	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 1684	3060	lsass.exe	82
PID 3060 wrote to memory of 1684	3060	lsass.exe	82
PID 3060 wrote to memory of 4500	3060	lsass.exe	85
PID 3060 wrote to memory of 4500	3060	lsass.exe	85
PID 3060 wrote to memory of 1960	3060	lsass.exe	87
PID 3060 wrote to memory of 1960	3060	lsass.exe	87
PID 3060 wrote to memory of 5096	3060	lsass.exe	89
PID 3060 wrote to memory of 5096	3060	lsass.exe	89
PID 3060 wrote to memory of 2064	3060	lsass.exe	91
PID 3060 wrote to memory of 2064	3060	lsass.exe	91
PID 3060 wrote to memory of 1432	3060	lsass.exe	93
PID 3060 wrote to memory of 1432	3060	lsass.exe	93
PID 3060 wrote to memory of 1332	3060	lsass.exe	95
PID 3060 wrote to memory of 1332	3060	lsass.exe	95
PID 3060 wrote to memory of 3440	3060	lsass.exe	97
PID 3060 wrote to memory of 3440	3060	lsass.exe	97
PID 3060 wrote to memory of 1492	3060	lsass.exe	99
PID 3060 wrote to memory of 1492	3060	lsass.exe	99
PID 3060 wrote to memory of 2832	3060	lsass.exe	101
PID 3060 wrote to memory of 2832	3060	lsass.exe	101
PID 3060 wrote to memory of 2012	3060	lsass.exe	103
PID 3060 wrote to memory of 2012	3060	lsass.exe	103
PID 3060 wrote to memory of 3476	3060	lsass.exe	105
PID 3060 wrote to memory of 3476	3060	lsass.exe	105
PID 3476 wrote to memory of 1860	3476	cmd.exe	107
PID 3476 wrote to memory of 1860	3476	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4500	attrib.exe

C:\Users\Admin\AppData\Local\Temp\lsass.exe
"C:\Users\Admin\AppData\Local\Temp\lsass.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1684
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\lsass.exe"
  2⤵
  - Views/modifies file attributes
  PID:4500
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\lsass.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1960
- 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:5096
- 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:2064
- 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:1432
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3440
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1492
- 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:2832
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2012
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\lsass.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3476
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1860

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
d0a4a3b9a52b8fe3b019f6cd0ef3dad6

SHA1
fed70ce7834c3b97edbd078eccda1e5effa527cd

SHA256
21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31

SHA512
1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b

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

Filesize
948B

MD5
f69b8ef21549697552bb65c157e59c67

SHA1
6c6e9f77f0ab54c3c3cda4fa49c05720a77f2af4

SHA256
cf286f96b61a2d83a2bb04a38c922d508d17279a9f171830775912f0f355a226

SHA512
e2c5b53634542a1a36cb8a3323c4b1d3a3c76566d6eb50c699ac5ab129de1dc6b942c2fe98d1c28c96fedc7bb5b1aa7fc4f704a84c715ee14d2e1b0396ce1126

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

Filesize
1KB

MD5
de1cbc191bee1d162d00561785ff3e3f

SHA1
e65c6208aaeb730c3242fec9afbfe797fb464f66

SHA256
7eda0e7287adda6d5511bb314988c270a1ec05a6bd7fcbfab698ed7b4b195434

SHA512
af507d8a805f43842e87414b43c1a0f8973f3d663d2efeb0556b9d212741d159e2f0d0e0528588d9dba1278cca1efd37ab4d28c118c4424345191d0b016d2013

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

Filesize
1KB

MD5
6954f218ba4c7d0fe9cbf31e88fe3a69

SHA1
f6f26b65a7892fdcd1372dedbbb1a7fdd2b1db88

SHA256
b33cf6e9bb2ceccfb71165bcb40fa340fde43da503d3a4443d03aeddf28832e4

SHA512
e7f2aec7ef1cb35c37c8fd0d3d012a66c8aaaefc92c7975fb5597760730c9909dac76961aea6b19844863e90f992b9936efd6cf519fbc971668a86f34c1d0744

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nafvrx4y.nlg.psm1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1960-11-0x00007FFE271E0000-0x00007FFE27CA2000-memory.dmp

Filesize
10.8MB

Download
memory/1960-16-0x00007FFE271E0000-0x00007FFE27CA2000-memory.dmp

Filesize
10.8MB

Download
memory/1960-15-0x00007FFE271E0000-0x00007FFE27CA2000-memory.dmp

Filesize
10.8MB

Download
memory/1960-12-0x00007FFE271E0000-0x00007FFE27CA2000-memory.dmp

Filesize
10.8MB

Download
memory/1960-10-0x00000227CCFB0000-0x00000227CCFD2000-memory.dmp

Filesize
136KB

Download
memory/3060-30-0x0000022680080000-0x00000226800F6000-memory.dmp

Filesize
472KB

Download
memory/3060-31-0x0000022680100000-0x0000022680150000-memory.dmp

Filesize
320KB

Download
memory/3060-32-0x0000022680020000-0x000002268003E000-memory.dmp

Filesize
120KB

Download
memory/3060-0-0x00007FFE271E3000-0x00007FFE271E5000-memory.dmp

Filesize
8KB

Download
memory/3060-66-0x0000022680010000-0x000002268001A000-memory.dmp

Filesize
40KB

Download
memory/3060-67-0x0000022680060000-0x0000022680072000-memory.dmp

Filesize
72KB

Download
memory/3060-1-0x0000022665EF0000-0x0000022665F30000-memory.dmp

Filesize
256KB

Download