umbral | 20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
21-08-2024 09:53

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General

Target

20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
Size

506KB
MD5

6f801049dc7c819dc80f015947962f47
SHA1

427c1556b90aa70d3d1b3314bc88325ea30f4687
SHA256

20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd
SHA512

d6dd99f5dcaa1717d36ab6f2ad17264416114b77750bfe90901f37bfabbd5ba2f54f43f356cf1e4db6376eb2b0a8850502ce6535f546c59799961241333bfe2e
SSDEEP

6144:uloZM9rIkd8g+EtXHkv/iD4CGYhfVeGJdMFXSy3v7Igb8e1mSiZ:4oZOL+EP8CGYhfVeGJdMFXSy3vZUZ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2456-1-0x0000027F11C60000-0x0000027F11CE6000-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
3524	powershell.exe
3460	powershell.exe
1880	powershell.exe
3492	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.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
31	discord.com
32	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
10	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
4628	cmd.exe
2304	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3172	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2304	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3524	powershell.exe
3524	powershell.exe
3460	powershell.exe
3460	powershell.exe
1880	powershell.exe
1880	powershell.exe
2040	powershell.exe
2040	powershell.exe
3492	powershell.exe
3492	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
Token: SeDebugPrivilege	3524	powershell.exe
Token: SeDebugPrivilege	3460	powershell.exe
Token: SeDebugPrivilege	1880	powershell.exe
Token: SeDebugPrivilege	2040	powershell.exe
Token: SeIncreaseQuotaPrivilege	2360	wmic.exe
Token: SeSecurityPrivilege	2360	wmic.exe
Token: SeTakeOwnershipPrivilege	2360	wmic.exe
Token: SeLoadDriverPrivilege	2360	wmic.exe
Token: SeSystemProfilePrivilege	2360	wmic.exe
Token: SeSystemtimePrivilege	2360	wmic.exe
Token: SeProfSingleProcessPrivilege	2360	wmic.exe
Token: SeIncBasePriorityPrivilege	2360	wmic.exe
Token: SeCreatePagefilePrivilege	2360	wmic.exe
Token: SeBackupPrivilege	2360	wmic.exe
Token: SeRestorePrivilege	2360	wmic.exe
Token: SeShutdownPrivilege	2360	wmic.exe
Token: SeDebugPrivilege	2360	wmic.exe
Token: SeSystemEnvironmentPrivilege	2360	wmic.exe
Token: SeRemoteShutdownPrivilege	2360	wmic.exe
Token: SeUndockPrivilege	2360	wmic.exe
Token: SeManageVolumePrivilege	2360	wmic.exe
Token: 33	2360	wmic.exe
Token: 34	2360	wmic.exe
Token: 35	2360	wmic.exe
Token: 36	2360	wmic.exe
Token: SeIncreaseQuotaPrivilege	2360	wmic.exe
Token: SeSecurityPrivilege	2360	wmic.exe
Token: SeTakeOwnershipPrivilege	2360	wmic.exe
Token: SeLoadDriverPrivilege	2360	wmic.exe
Token: SeSystemProfilePrivilege	2360	wmic.exe
Token: SeSystemtimePrivilege	2360	wmic.exe
Token: SeProfSingleProcessPrivilege	2360	wmic.exe
Token: SeIncBasePriorityPrivilege	2360	wmic.exe
Token: SeCreatePagefilePrivilege	2360	wmic.exe
Token: SeBackupPrivilege	2360	wmic.exe
Token: SeRestorePrivilege	2360	wmic.exe
Token: SeShutdownPrivilege	2360	wmic.exe
Token: SeDebugPrivilege	2360	wmic.exe
Token: SeSystemEnvironmentPrivilege	2360	wmic.exe
Token: SeRemoteShutdownPrivilege	2360	wmic.exe
Token: SeUndockPrivilege	2360	wmic.exe
Token: SeManageVolumePrivilege	2360	wmic.exe
Token: 33	2360	wmic.exe
Token: 34	2360	wmic.exe
Token: 35	2360	wmic.exe
Token: 36	2360	wmic.exe
Token: SeIncreaseQuotaPrivilege	3540	wmic.exe
Token: SeSecurityPrivilege	3540	wmic.exe
Token: SeTakeOwnershipPrivilege	3540	wmic.exe
Token: SeLoadDriverPrivilege	3540	wmic.exe
Token: SeSystemProfilePrivilege	3540	wmic.exe
Token: SeSystemtimePrivilege	3540	wmic.exe
Token: SeProfSingleProcessPrivilege	3540	wmic.exe
Token: SeIncBasePriorityPrivilege	3540	wmic.exe
Token: SeCreatePagefilePrivilege	3540	wmic.exe
Token: SeBackupPrivilege	3540	wmic.exe
Token: SeRestorePrivilege	3540	wmic.exe
Token: SeShutdownPrivilege	3540	wmic.exe
Token: SeDebugPrivilege	3540	wmic.exe
Token: SeSystemEnvironmentPrivilege	3540	wmic.exe
Token: SeRemoteShutdownPrivilege	3540	wmic.exe
Token: SeUndockPrivilege	3540	wmic.exe
Token: SeManageVolumePrivilege	3540	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2456 wrote to memory of 4216	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	87
PID 2456 wrote to memory of 4216	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	87
PID 2456 wrote to memory of 3524	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	89
PID 2456 wrote to memory of 3524	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	89
PID 2456 wrote to memory of 3460	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	91
PID 2456 wrote to memory of 3460	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	91
PID 2456 wrote to memory of 1880	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	93
PID 2456 wrote to memory of 1880	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	93
PID 2456 wrote to memory of 2040	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	95
PID 2456 wrote to memory of 2040	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	95
PID 2456 wrote to memory of 2360	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	97
PID 2456 wrote to memory of 2360	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	97
PID 2456 wrote to memory of 3540	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	100
PID 2456 wrote to memory of 3540	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	100
PID 2456 wrote to memory of 4972	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	102
PID 2456 wrote to memory of 4972	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	102
PID 2456 wrote to memory of 3492	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	104
PID 2456 wrote to memory of 3492	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	104
PID 2456 wrote to memory of 3172	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	108
PID 2456 wrote to memory of 3172	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	108
PID 2456 wrote to memory of 4628	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	111
PID 2456 wrote to memory of 4628	2456	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	111
PID 4628 wrote to memory of 2304	4628	cmd.exe	113
PID 4628 wrote to memory of 2304	4628	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4216	attrib.exe

C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
"C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2456
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe"
  2⤵
  - Views/modifies file attributes
  PID:4216
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3524
- 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:3460
- 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:1880
- 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:2040
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2360
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3540
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4972
- 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:3492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3172
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4628
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2304

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
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jnfg4ypt.ple.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2456-1-0x0000027F11C60000-0x0000027F11CE6000-memory.dmp

Filesize
536KB

Download
memory/2456-30-0x0000027F2C420000-0x0000027F2C496000-memory.dmp

Filesize
472KB

Download
memory/2456-31-0x0000027F2C4A0000-0x0000027F2C4F0000-memory.dmp

Filesize
320KB

Download
memory/2456-32-0x0000027F2C120000-0x0000027F2C13E000-memory.dmp

Filesize
120KB

Download
memory/2456-68-0x0000027F2C140000-0x0000027F2C14A000-memory.dmp

Filesize
40KB

Download
memory/2456-69-0x0000027F2C170000-0x0000027F2C182000-memory.dmp

Filesize
72KB

Download
memory/2456-0-0x00007FF813C20000-0x00007FF813CBD000-memory.dmp

Filesize
628KB

Download
memory/2456-87-0x00007FF813C20000-0x00007FF813CBD000-memory.dmp

Filesize
628KB

Download
memory/3524-15-0x00007FF813C20000-0x00007FF813CBD000-memory.dmp

Filesize
628KB

Download
memory/3524-8-0x0000018C9C6A0000-0x0000018C9C6C2000-memory.dmp

Filesize
136KB

Download
memory/3524-2-0x00007FF813C20000-0x00007FF813CBD000-memory.dmp

Filesize
628KB

Download