umbral | 3d33b7e8a8541de77e1428e6998cf1d77e1e3c7121ff42bb92285614db513bc9

Analysis

max time kernel
68s
max time network
70s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-08-2024 20:20

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General

Target

Optimization_Pc_Twea.exe
Size

240KB
MD5

3ab1d460b16ec34493d9d769729a53fc
SHA1

e7e379fb8d8390103e53c31f07a52dbd1bc796a1
SHA256

3d33b7e8a8541de77e1428e6998cf1d77e1e3c7121ff42bb92285614db513bc9
SHA512

37d59d665ed891832e3e8efd6b74116bb51230a69b1c5fff53e2aaf8eaaade4d807215dae3bbd26ec5812f8bae55f2d982e975d38c0d6ce684b5b2cea93f2949
SSDEEP

6144:vloZMNrIkd8g+EtXHkv/iD4lx4+Clg8e1mbTi:NoZmL+EP8DMwK+

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/944-1-0x0000017C68550000-0x0000017C68592000-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
1612	powershell.exe
528	powershell.exe
3124	powershell.exe
4432	powershell.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
24	discord.com
25	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
20	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1244	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1612	powershell.exe
1612	powershell.exe
528	powershell.exe
528	powershell.exe
3124	powershell.exe
3124	powershell.exe
3488	powershell.exe
3488	powershell.exe
4432	powershell.exe
4432	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	944	Optimization_Pc_Twea.exe
Token: SeDebugPrivilege	1612	powershell.exe
Token: SeDebugPrivilege	528	powershell.exe
Token: SeDebugPrivilege	3124	powershell.exe
Token: SeDebugPrivilege	3488	powershell.exe
Token: SeIncreaseQuotaPrivilege	3336	wmic.exe
Token: SeSecurityPrivilege	3336	wmic.exe
Token: SeTakeOwnershipPrivilege	3336	wmic.exe
Token: SeLoadDriverPrivilege	3336	wmic.exe
Token: SeSystemProfilePrivilege	3336	wmic.exe
Token: SeSystemtimePrivilege	3336	wmic.exe
Token: SeProfSingleProcessPrivilege	3336	wmic.exe
Token: SeIncBasePriorityPrivilege	3336	wmic.exe
Token: SeCreatePagefilePrivilege	3336	wmic.exe
Token: SeBackupPrivilege	3336	wmic.exe
Token: SeRestorePrivilege	3336	wmic.exe
Token: SeShutdownPrivilege	3336	wmic.exe
Token: SeDebugPrivilege	3336	wmic.exe
Token: SeSystemEnvironmentPrivilege	3336	wmic.exe
Token: SeRemoteShutdownPrivilege	3336	wmic.exe
Token: SeUndockPrivilege	3336	wmic.exe
Token: SeManageVolumePrivilege	3336	wmic.exe
Token: 33	3336	wmic.exe
Token: 34	3336	wmic.exe
Token: 35	3336	wmic.exe
Token: 36	3336	wmic.exe
Token: SeIncreaseQuotaPrivilege	3336	wmic.exe
Token: SeSecurityPrivilege	3336	wmic.exe
Token: SeTakeOwnershipPrivilege	3336	wmic.exe
Token: SeLoadDriverPrivilege	3336	wmic.exe
Token: SeSystemProfilePrivilege	3336	wmic.exe
Token: SeSystemtimePrivilege	3336	wmic.exe
Token: SeProfSingleProcessPrivilege	3336	wmic.exe
Token: SeIncBasePriorityPrivilege	3336	wmic.exe
Token: SeCreatePagefilePrivilege	3336	wmic.exe
Token: SeBackupPrivilege	3336	wmic.exe
Token: SeRestorePrivilege	3336	wmic.exe
Token: SeShutdownPrivilege	3336	wmic.exe
Token: SeDebugPrivilege	3336	wmic.exe
Token: SeSystemEnvironmentPrivilege	3336	wmic.exe
Token: SeRemoteShutdownPrivilege	3336	wmic.exe
Token: SeUndockPrivilege	3336	wmic.exe
Token: SeManageVolumePrivilege	3336	wmic.exe
Token: 33	3336	wmic.exe
Token: 34	3336	wmic.exe
Token: 35	3336	wmic.exe
Token: 36	3336	wmic.exe
Token: SeIncreaseQuotaPrivilege	1096	wmic.exe
Token: SeSecurityPrivilege	1096	wmic.exe
Token: SeTakeOwnershipPrivilege	1096	wmic.exe
Token: SeLoadDriverPrivilege	1096	wmic.exe
Token: SeSystemProfilePrivilege	1096	wmic.exe
Token: SeSystemtimePrivilege	1096	wmic.exe
Token: SeProfSingleProcessPrivilege	1096	wmic.exe
Token: SeIncBasePriorityPrivilege	1096	wmic.exe
Token: SeCreatePagefilePrivilege	1096	wmic.exe
Token: SeBackupPrivilege	1096	wmic.exe
Token: SeRestorePrivilege	1096	wmic.exe
Token: SeShutdownPrivilege	1096	wmic.exe
Token: SeDebugPrivilege	1096	wmic.exe
Token: SeSystemEnvironmentPrivilege	1096	wmic.exe
Token: SeRemoteShutdownPrivilege	1096	wmic.exe
Token: SeUndockPrivilege	1096	wmic.exe
Token: SeManageVolumePrivilege	1096	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 944 wrote to memory of 1612	944	Optimization_Pc_Twea.exe	88
PID 944 wrote to memory of 1612	944	Optimization_Pc_Twea.exe	88
PID 944 wrote to memory of 528	944	Optimization_Pc_Twea.exe	90
PID 944 wrote to memory of 528	944	Optimization_Pc_Twea.exe	90
PID 944 wrote to memory of 3124	944	Optimization_Pc_Twea.exe	93
PID 944 wrote to memory of 3124	944	Optimization_Pc_Twea.exe	93
PID 944 wrote to memory of 3488	944	Optimization_Pc_Twea.exe	95
PID 944 wrote to memory of 3488	944	Optimization_Pc_Twea.exe	95
PID 944 wrote to memory of 3336	944	Optimization_Pc_Twea.exe	97
PID 944 wrote to memory of 3336	944	Optimization_Pc_Twea.exe	97
PID 944 wrote to memory of 1096	944	Optimization_Pc_Twea.exe	100
PID 944 wrote to memory of 1096	944	Optimization_Pc_Twea.exe	100
PID 944 wrote to memory of 1508	944	Optimization_Pc_Twea.exe	102
PID 944 wrote to memory of 1508	944	Optimization_Pc_Twea.exe	102
PID 944 wrote to memory of 4432	944	Optimization_Pc_Twea.exe	104
PID 944 wrote to memory of 4432	944	Optimization_Pc_Twea.exe	104
PID 944 wrote to memory of 1244	944	Optimization_Pc_Twea.exe	106
PID 944 wrote to memory of 1244	944	Optimization_Pc_Twea.exe	106

C:\Users\Admin\AppData\Local\Temp\Optimization_Pc_Twea.exe
"C:\Users\Admin\AppData\Local\Temp\Optimization_Pc_Twea.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:944
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Optimization_Pc_Twea.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1612
- 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:528
- 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:3124
- 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:3488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3336
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1096
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1508
- 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:4432
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1244

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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
ec79fae4e7c09310ebf4f2d85a33a638

SHA1
f2bdd995b12e65e7ed437d228f22223b59e76efb

SHA256
e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

SHA512
af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_svys2o4s.a4g.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/944-69-0x0000017C6A330000-0x0000017C6A33A000-memory.dmp

Filesize
40KB

Download
memory/944-33-0x0000017C6A2F0000-0x0000017C6A30E000-memory.dmp

Filesize
120KB

Download
memory/944-88-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/944-70-0x0000017C6ACD0000-0x0000017C6ACE2000-memory.dmp

Filesize
72KB

Download
memory/944-2-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/944-31-0x0000017C6AD00000-0x0000017C6AD76000-memory.dmp

Filesize
472KB

Download
memory/944-32-0x0000017C6AC80000-0x0000017C6ACD0000-memory.dmp

Filesize
320KB

Download
memory/944-0-0x00007FF9A8983000-0x00007FF9A8985000-memory.dmp

Filesize
8KB

Download
memory/944-1-0x0000017C68550000-0x0000017C68592000-memory.dmp

Filesize
264KB

Download
memory/1612-15-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/1612-8-0x0000026CE8A30000-0x0000026CE8A52000-memory.dmp

Filesize
136KB

Download
memory/1612-14-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/1612-13-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download
memory/1612-18-0x00007FF9A8980000-0x00007FF9A9441000-memory.dmp

Filesize
10.8MB

Download