umbral | 85ec91cce58a9d18f5161164fa36f3c32ab4a133e331e30143026692824aae52

Analysis

max time kernel
95s
max time network
206s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06-09-2024 00:38

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General

Target

1.exe
Size

231KB
MD5

55ede8f26c8c4e66cb0ce6f611d1cda9
SHA1

7afcbd679f67ccebfa2b187a864051c47dcff247
SHA256

85ec91cce58a9d18f5161164fa36f3c32ab4a133e331e30143026692824aae52
SHA512

6943227a873ed601fe2d81da7498b8a4323c525cead8a32ad35c9e51513cf50b99c2d0486e6da3463992db81b0cfdf280829cb4bb59e32c2ad32e1c3cd58a77b
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD4wuqmn9GuBV0dP6aPKEb8e1m5Mi:joZtL+EP8wuqmn9GuBV0dP6aPTKF

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4120-1-0x000001FB6EC00000-0x000001FB6EC40000-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
2488	powershell.exe
3324	powershell.exe
4164	powershell.exe
3552	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	1.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
7	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
2720	cmd.exe
2684	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3792	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2684	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4120	1.exe
2488	powershell.exe
2488	powershell.exe
3552	powershell.exe
3552	powershell.exe
3324	powershell.exe
3324	powershell.exe
384	powershell.exe
384	powershell.exe
4164	powershell.exe
4164	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4120	1.exe
Token: SeIncreaseQuotaPrivilege	2524	wmic.exe
Token: SeSecurityPrivilege	2524	wmic.exe
Token: SeTakeOwnershipPrivilege	2524	wmic.exe
Token: SeLoadDriverPrivilege	2524	wmic.exe
Token: SeSystemProfilePrivilege	2524	wmic.exe
Token: SeSystemtimePrivilege	2524	wmic.exe
Token: SeProfSingleProcessPrivilege	2524	wmic.exe
Token: SeIncBasePriorityPrivilege	2524	wmic.exe
Token: SeCreatePagefilePrivilege	2524	wmic.exe
Token: SeBackupPrivilege	2524	wmic.exe
Token: SeRestorePrivilege	2524	wmic.exe
Token: SeShutdownPrivilege	2524	wmic.exe
Token: SeDebugPrivilege	2524	wmic.exe
Token: SeSystemEnvironmentPrivilege	2524	wmic.exe
Token: SeRemoteShutdownPrivilege	2524	wmic.exe
Token: SeUndockPrivilege	2524	wmic.exe
Token: SeManageVolumePrivilege	2524	wmic.exe
Token: 33	2524	wmic.exe
Token: 34	2524	wmic.exe
Token: 35	2524	wmic.exe
Token: 36	2524	wmic.exe
Token: SeIncreaseQuotaPrivilege	2524	wmic.exe
Token: SeSecurityPrivilege	2524	wmic.exe
Token: SeTakeOwnershipPrivilege	2524	wmic.exe
Token: SeLoadDriverPrivilege	2524	wmic.exe
Token: SeSystemProfilePrivilege	2524	wmic.exe
Token: SeSystemtimePrivilege	2524	wmic.exe
Token: SeProfSingleProcessPrivilege	2524	wmic.exe
Token: SeIncBasePriorityPrivilege	2524	wmic.exe
Token: SeCreatePagefilePrivilege	2524	wmic.exe
Token: SeBackupPrivilege	2524	wmic.exe
Token: SeRestorePrivilege	2524	wmic.exe
Token: SeShutdownPrivilege	2524	wmic.exe
Token: SeDebugPrivilege	2524	wmic.exe
Token: SeSystemEnvironmentPrivilege	2524	wmic.exe
Token: SeRemoteShutdownPrivilege	2524	wmic.exe
Token: SeUndockPrivilege	2524	wmic.exe
Token: SeManageVolumePrivilege	2524	wmic.exe
Token: 33	2524	wmic.exe
Token: 34	2524	wmic.exe
Token: 35	2524	wmic.exe
Token: 36	2524	wmic.exe
Token: SeDebugPrivilege	2488	powershell.exe
Token: SeDebugPrivilege	3552	powershell.exe
Token: SeDebugPrivilege	3324	powershell.exe
Token: SeDebugPrivilege	384	powershell.exe
Token: SeIncreaseQuotaPrivilege	1284	wmic.exe
Token: SeSecurityPrivilege	1284	wmic.exe
Token: SeTakeOwnershipPrivilege	1284	wmic.exe
Token: SeLoadDriverPrivilege	1284	wmic.exe
Token: SeSystemProfilePrivilege	1284	wmic.exe
Token: SeSystemtimePrivilege	1284	wmic.exe
Token: SeProfSingleProcessPrivilege	1284	wmic.exe
Token: SeIncBasePriorityPrivilege	1284	wmic.exe
Token: SeCreatePagefilePrivilege	1284	wmic.exe
Token: SeBackupPrivilege	1284	wmic.exe
Token: SeRestorePrivilege	1284	wmic.exe
Token: SeShutdownPrivilege	1284	wmic.exe
Token: SeDebugPrivilege	1284	wmic.exe
Token: SeSystemEnvironmentPrivilege	1284	wmic.exe
Token: SeRemoteShutdownPrivilege	1284	wmic.exe
Token: SeUndockPrivilege	1284	wmic.exe
Token: SeManageVolumePrivilege	1284	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 2524	4120	1.exe	85
PID 4120 wrote to memory of 2524	4120	1.exe	85
PID 4120 wrote to memory of 1756	4120	1.exe	89
PID 4120 wrote to memory of 1756	4120	1.exe	89
PID 4120 wrote to memory of 2488	4120	1.exe	91
PID 4120 wrote to memory of 2488	4120	1.exe	91
PID 4120 wrote to memory of 3552	4120	1.exe	94
PID 4120 wrote to memory of 3552	4120	1.exe	94
PID 4120 wrote to memory of 3324	4120	1.exe	96
PID 4120 wrote to memory of 3324	4120	1.exe	96
PID 4120 wrote to memory of 384	4120	1.exe	98
PID 4120 wrote to memory of 384	4120	1.exe	98
PID 4120 wrote to memory of 1284	4120	1.exe	102
PID 4120 wrote to memory of 1284	4120	1.exe	102
PID 4120 wrote to memory of 1600	4120	1.exe	104
PID 4120 wrote to memory of 1600	4120	1.exe	104
PID 4120 wrote to memory of 2972	4120	1.exe	107
PID 4120 wrote to memory of 2972	4120	1.exe	107
PID 4120 wrote to memory of 4164	4120	1.exe	109
PID 4120 wrote to memory of 4164	4120	1.exe	109
PID 4120 wrote to memory of 3792	4120	1.exe	111
PID 4120 wrote to memory of 3792	4120	1.exe	111
PID 4120 wrote to memory of 2720	4120	1.exe	113
PID 4120 wrote to memory of 2720	4120	1.exe	113
PID 2720 wrote to memory of 2684	2720	cmd.exe	115
PID 2720 wrote to memory of 2684	2720	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1756	attrib.exe

C:\Users\Admin\AppData\Local\Temp\1.exe
"C:\Users\Admin\AppData\Local\Temp\1.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4120
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2524
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\1.exe"
  2⤵
  - Views/modifies file attributes
  PID:1756
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\1.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2488
- 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:3552
- 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:3324
- 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:384
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1284
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1600
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2972
- 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:4164
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3792
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\1.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2720
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2684

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
c523adc639d16ffb0f96cebc63eed858

SHA1
12ff3728fe7a266d00bea61357e168d1ac35fb8b

SHA256
3f3c9377b171cf14fcf2bfe2ef6ab7753c1470c8fe803fb73317fa3732c55df1

SHA512
36dd1d5df9f67a708087ae024f4088fbe6ed11859c65c896f4c7b40631e418646295078abe0bd1e7062b3dd5f333d8cf86a8542ef719e4b14feec877c60839ba

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_oaa5da1q.25i.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2488-3-0x00007FFD8BFE0000-0x00007FFD8CAA1000-memory.dmp

Filesize
10.8MB

Download
memory/2488-9-0x000001F6F2D50000-0x000001F6F2D72000-memory.dmp

Filesize
136KB

Download
memory/2488-16-0x00007FFD8BFE0000-0x00007FFD8CAA1000-memory.dmp

Filesize
10.8MB

Download
memory/4120-31-0x000001FB71420000-0x000001FB71496000-memory.dmp

Filesize
472KB

Download
memory/4120-32-0x000001FB712C0000-0x000001FB71310000-memory.dmp

Filesize
320KB

Download
memory/4120-33-0x000001FB70890000-0x000001FB708AE000-memory.dmp

Filesize
120KB

Download
memory/4120-0-0x00007FFD8BFE3000-0x00007FFD8BFE5000-memory.dmp

Filesize
8KB

Download
memory/4120-1-0x000001FB6EC00000-0x000001FB6EC40000-memory.dmp

Filesize
256KB

Download
memory/4120-69-0x000001FB708B0000-0x000001FB708BA000-memory.dmp

Filesize
40KB

Download
memory/4120-70-0x000001FB708E0000-0x000001FB708F2000-memory.dmp

Filesize
72KB

Download
memory/4120-2-0x00007FFD8BFE0000-0x00007FFD8CAA1000-memory.dmp

Filesize
10.8MB

Download
memory/4120-88-0x00007FFD8BFE0000-0x00007FFD8CAA1000-memory.dmp

Filesize
10.8MB

Download