umbral | 20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd

Analysis

max time kernel
139s
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 01:16

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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/4104-1-0x000001CA273D0000-0x000001CA27456000-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
3560	powershell.exe
4832	powershell.exe
232	powershell.exe
1552	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
19	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
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
2868	cmd.exe
3044	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1380	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3044	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3560	powershell.exe
3560	powershell.exe
232	powershell.exe
232	powershell.exe
1552	powershell.exe
1552	powershell.exe
2536	powershell.exe
2536	powershell.exe
4832	powershell.exe
4832	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe
Token: SeDebugPrivilege	3560	powershell.exe
Token: SeDebugPrivilege	232	powershell.exe
Token: SeDebugPrivilege	1552	powershell.exe
Token: SeDebugPrivilege	2536	powershell.exe
Token: SeIncreaseQuotaPrivilege	2332	wmic.exe
Token: SeSecurityPrivilege	2332	wmic.exe
Token: SeTakeOwnershipPrivilege	2332	wmic.exe
Token: SeLoadDriverPrivilege	2332	wmic.exe
Token: SeSystemProfilePrivilege	2332	wmic.exe
Token: SeSystemtimePrivilege	2332	wmic.exe
Token: SeProfSingleProcessPrivilege	2332	wmic.exe
Token: SeIncBasePriorityPrivilege	2332	wmic.exe
Token: SeCreatePagefilePrivilege	2332	wmic.exe
Token: SeBackupPrivilege	2332	wmic.exe
Token: SeRestorePrivilege	2332	wmic.exe
Token: SeShutdownPrivilege	2332	wmic.exe
Token: SeDebugPrivilege	2332	wmic.exe
Token: SeSystemEnvironmentPrivilege	2332	wmic.exe
Token: SeRemoteShutdownPrivilege	2332	wmic.exe
Token: SeUndockPrivilege	2332	wmic.exe
Token: SeManageVolumePrivilege	2332	wmic.exe
Token: 33	2332	wmic.exe
Token: 34	2332	wmic.exe
Token: 35	2332	wmic.exe
Token: 36	2332	wmic.exe
Token: SeIncreaseQuotaPrivilege	2332	wmic.exe
Token: SeSecurityPrivilege	2332	wmic.exe
Token: SeTakeOwnershipPrivilege	2332	wmic.exe
Token: SeLoadDriverPrivilege	2332	wmic.exe
Token: SeSystemProfilePrivilege	2332	wmic.exe
Token: SeSystemtimePrivilege	2332	wmic.exe
Token: SeProfSingleProcessPrivilege	2332	wmic.exe
Token: SeIncBasePriorityPrivilege	2332	wmic.exe
Token: SeCreatePagefilePrivilege	2332	wmic.exe
Token: SeBackupPrivilege	2332	wmic.exe
Token: SeRestorePrivilege	2332	wmic.exe
Token: SeShutdownPrivilege	2332	wmic.exe
Token: SeDebugPrivilege	2332	wmic.exe
Token: SeSystemEnvironmentPrivilege	2332	wmic.exe
Token: SeRemoteShutdownPrivilege	2332	wmic.exe
Token: SeUndockPrivilege	2332	wmic.exe
Token: SeManageVolumePrivilege	2332	wmic.exe
Token: 33	2332	wmic.exe
Token: 34	2332	wmic.exe
Token: 35	2332	wmic.exe
Token: 36	2332	wmic.exe
Token: SeIncreaseQuotaPrivilege	540	wmic.exe
Token: SeSecurityPrivilege	540	wmic.exe
Token: SeTakeOwnershipPrivilege	540	wmic.exe
Token: SeLoadDriverPrivilege	540	wmic.exe
Token: SeSystemProfilePrivilege	540	wmic.exe
Token: SeSystemtimePrivilege	540	wmic.exe
Token: SeProfSingleProcessPrivilege	540	wmic.exe
Token: SeIncBasePriorityPrivilege	540	wmic.exe
Token: SeCreatePagefilePrivilege	540	wmic.exe
Token: SeBackupPrivilege	540	wmic.exe
Token: SeRestorePrivilege	540	wmic.exe
Token: SeShutdownPrivilege	540	wmic.exe
Token: SeDebugPrivilege	540	wmic.exe
Token: SeSystemEnvironmentPrivilege	540	wmic.exe
Token: SeRemoteShutdownPrivilege	540	wmic.exe
Token: SeUndockPrivilege	540	wmic.exe
Token: SeManageVolumePrivilege	540	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4104 wrote to memory of 4620	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	84
PID 4104 wrote to memory of 4620	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	84
PID 4104 wrote to memory of 3560	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	86
PID 4104 wrote to memory of 3560	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	86
PID 4104 wrote to memory of 232	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	89
PID 4104 wrote to memory of 232	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	89
PID 4104 wrote to memory of 1552	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	92
PID 4104 wrote to memory of 1552	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	92
PID 4104 wrote to memory of 2536	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	94
PID 4104 wrote to memory of 2536	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	94
PID 4104 wrote to memory of 2332	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	99
PID 4104 wrote to memory of 2332	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	99
PID 4104 wrote to memory of 540	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	102
PID 4104 wrote to memory of 540	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	102
PID 4104 wrote to memory of 2708	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	104
PID 4104 wrote to memory of 2708	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	104
PID 4104 wrote to memory of 4832	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	106
PID 4104 wrote to memory of 4832	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	106
PID 4104 wrote to memory of 1380	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	108
PID 4104 wrote to memory of 1380	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	108
PID 4104 wrote to memory of 2868	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	111
PID 4104 wrote to memory of 2868	4104	20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe	111
PID 2868 wrote to memory of 3044	2868	cmd.exe	113
PID 2868 wrote to memory of 3044	2868	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4620	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:4104
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\20a5f718e30ebf604171a2e6c7b57fdd3affb5d1b3845920c12543fc9e8337bd.exe"
  2⤵
  - Views/modifies file attributes
  PID:4620
- 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:3560
- 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:232
- 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:1552
- 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:2536
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:540
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2708
- 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:4832
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1380
- 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:2868
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3044

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
5824a6037c081fda5d46de274b6e2799

SHA1
526367a09300cbde430e8fb44e41cbe7a0937aac

SHA256
4d610d9cd32a20279c7133a726ff61820d6930e5aa18253ee1422f3a6f54953f

SHA512
a109b150f730cda78d5bee106bd232f9dca7500dfb7899c6919de2bd542e345ca271aa11809a24ea0a27dca158067ab3a2d5688ac0a2325185143245f1665582

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
db38dbf21fdd07d760a6185f4022676e

SHA1
e8df087e0edd7f16342ca420eb58962aefdfa8fe

SHA256
01b1595a62d22f4e0a02b93c01e227fdaa0b142aeeba0ad891e26f7d40fbf47b

SHA512
ec5471a476464c97f1472f73ec0de2eb6c2ce219c563fb99f12407e233ba0f4ba271d5eebd49cba7510908a2456f2c54a5da2580749a96071fd422c1f1d695af

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5354qf3t.hsk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3560-8-0x000002B6BA600000-0x000002B6BA622000-memory.dmp

Filesize
136KB

Download
memory/3560-13-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/3560-14-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/3560-15-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/3560-18-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/4104-34-0x000001CA41BF0000-0x000001CA41C40000-memory.dmp

Filesize
320KB

Download
memory/4104-33-0x000001CA41B70000-0x000001CA41BE6000-memory.dmp

Filesize
472KB

Download
memory/4104-35-0x000001CA41B10000-0x000001CA41B2E000-memory.dmp

Filesize
120KB

Download
memory/4104-1-0x000001CA273D0000-0x000001CA27456000-memory.dmp

Filesize
536KB

Download
memory/4104-0-0x00007FFE6B873000-0x00007FFE6B875000-memory.dmp

Filesize
8KB

Download
memory/4104-71-0x000001CA41AF0000-0x000001CA41AFA000-memory.dmp

Filesize
40KB

Download
memory/4104-72-0x000001CA41B50000-0x000001CA41B62000-memory.dmp

Filesize
72KB

Download
memory/4104-2-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download
memory/4104-90-0x00007FFE6B870000-0x00007FFE6C331000-memory.dmp

Filesize
10.8MB

Download