umbral | 1ab54a5786eeedb01e74215a50a796fefbd12c47c0b864b1be5f6d45a2951bf4

Analysis

max time kernel
132s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
08-08-2024 16:41

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General

Target

uhmuhh.exe
Size

229KB
MD5

0d407796194f47dd4739950f347631dc
SHA1

2e843294cd4ccbdcb53b0ca4cdcb0d6640d75615
SHA256

1ab54a5786eeedb01e74215a50a796fefbd12c47c0b864b1be5f6d45a2951bf4
SHA512

b70550be02cc4b622fa35c0189884104a2b6719e8b593e156b74874cffc835a906df3b746b2247c2bffffbb47be6470ba3ac16cb2c8e163785f64650c43a4b97
SSDEEP

6144:tloZMNrIkd8g+EtXHkv/iD41KaC9rI8j867NokRQg4db8e1mAG+Iwi:voZmL+EP81KaC9rI8j867NokRQgkC+Ip

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3104-0-0x00000153FEEF0000-0x00000153FEF30000-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
5908	powershell.exe
452	powershell.exe
1624	powershell.exe
3372	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
22	discord.com
23	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
19	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
6024	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
5908	powershell.exe
5908	powershell.exe
452	powershell.exe
452	powershell.exe
1624	powershell.exe
1624	powershell.exe
5196	powershell.exe
5196	powershell.exe
3372	powershell.exe
3372	powershell.exe
3372	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3104	uhmuhh.exe
Token: SeDebugPrivilege	5908	powershell.exe
Token: SeDebugPrivilege	452	powershell.exe
Token: SeDebugPrivilege	1624	powershell.exe
Token: SeDebugPrivilege	5196	powershell.exe
Token: SeIncreaseQuotaPrivilege	5956	wmic.exe
Token: SeSecurityPrivilege	5956	wmic.exe
Token: SeTakeOwnershipPrivilege	5956	wmic.exe
Token: SeLoadDriverPrivilege	5956	wmic.exe
Token: SeSystemProfilePrivilege	5956	wmic.exe
Token: SeSystemtimePrivilege	5956	wmic.exe
Token: SeProfSingleProcessPrivilege	5956	wmic.exe
Token: SeIncBasePriorityPrivilege	5956	wmic.exe
Token: SeCreatePagefilePrivilege	5956	wmic.exe
Token: SeBackupPrivilege	5956	wmic.exe
Token: SeRestorePrivilege	5956	wmic.exe
Token: SeShutdownPrivilege	5956	wmic.exe
Token: SeDebugPrivilege	5956	wmic.exe
Token: SeSystemEnvironmentPrivilege	5956	wmic.exe
Token: SeRemoteShutdownPrivilege	5956	wmic.exe
Token: SeUndockPrivilege	5956	wmic.exe
Token: SeManageVolumePrivilege	5956	wmic.exe
Token: 33	5956	wmic.exe
Token: 34	5956	wmic.exe
Token: 35	5956	wmic.exe
Token: 36	5956	wmic.exe
Token: SeIncreaseQuotaPrivilege	5956	wmic.exe
Token: SeSecurityPrivilege	5956	wmic.exe
Token: SeTakeOwnershipPrivilege	5956	wmic.exe
Token: SeLoadDriverPrivilege	5956	wmic.exe
Token: SeSystemProfilePrivilege	5956	wmic.exe
Token: SeSystemtimePrivilege	5956	wmic.exe
Token: SeProfSingleProcessPrivilege	5956	wmic.exe
Token: SeIncBasePriorityPrivilege	5956	wmic.exe
Token: SeCreatePagefilePrivilege	5956	wmic.exe
Token: SeBackupPrivilege	5956	wmic.exe
Token: SeRestorePrivilege	5956	wmic.exe
Token: SeShutdownPrivilege	5956	wmic.exe
Token: SeDebugPrivilege	5956	wmic.exe
Token: SeSystemEnvironmentPrivilege	5956	wmic.exe
Token: SeRemoteShutdownPrivilege	5956	wmic.exe
Token: SeUndockPrivilege	5956	wmic.exe
Token: SeManageVolumePrivilege	5956	wmic.exe
Token: 33	5956	wmic.exe
Token: 34	5956	wmic.exe
Token: 35	5956	wmic.exe
Token: 36	5956	wmic.exe
Token: SeIncreaseQuotaPrivilege	3756	wmic.exe
Token: SeSecurityPrivilege	3756	wmic.exe
Token: SeTakeOwnershipPrivilege	3756	wmic.exe
Token: SeLoadDriverPrivilege	3756	wmic.exe
Token: SeSystemProfilePrivilege	3756	wmic.exe
Token: SeSystemtimePrivilege	3756	wmic.exe
Token: SeProfSingleProcessPrivilege	3756	wmic.exe
Token: SeIncBasePriorityPrivilege	3756	wmic.exe
Token: SeCreatePagefilePrivilege	3756	wmic.exe
Token: SeBackupPrivilege	3756	wmic.exe
Token: SeRestorePrivilege	3756	wmic.exe
Token: SeShutdownPrivilege	3756	wmic.exe
Token: SeDebugPrivilege	3756	wmic.exe
Token: SeSystemEnvironmentPrivilege	3756	wmic.exe
Token: SeRemoteShutdownPrivilege	3756	wmic.exe
Token: SeUndockPrivilege	3756	wmic.exe
Token: SeManageVolumePrivilege	3756	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 3104 wrote to memory of 5908	3104	uhmuhh.exe	92
PID 3104 wrote to memory of 5908	3104	uhmuhh.exe	92
PID 3104 wrote to memory of 452	3104	uhmuhh.exe	95
PID 3104 wrote to memory of 452	3104	uhmuhh.exe	95
PID 3104 wrote to memory of 1624	3104	uhmuhh.exe	97
PID 3104 wrote to memory of 1624	3104	uhmuhh.exe	97
PID 3104 wrote to memory of 5196	3104	uhmuhh.exe	99
PID 3104 wrote to memory of 5196	3104	uhmuhh.exe	99
PID 3104 wrote to memory of 5956	3104	uhmuhh.exe	101
PID 3104 wrote to memory of 5956	3104	uhmuhh.exe	101
PID 3104 wrote to memory of 3756	3104	uhmuhh.exe	104
PID 3104 wrote to memory of 3756	3104	uhmuhh.exe	104
PID 3104 wrote to memory of 1636	3104	uhmuhh.exe	106
PID 3104 wrote to memory of 1636	3104	uhmuhh.exe	106
PID 3104 wrote to memory of 3372	3104	uhmuhh.exe	108
PID 3104 wrote to memory of 3372	3104	uhmuhh.exe	108
PID 3104 wrote to memory of 6024	3104	uhmuhh.exe	110
PID 3104 wrote to memory of 6024	3104	uhmuhh.exe	110

C:\Users\Admin\AppData\Local\Temp\uhmuhh.exe
"C:\Users\Admin\AppData\Local\Temp\uhmuhh.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3104
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\uhmuhh.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5908
- 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:452
- 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:1624
- 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:5196
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5956
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3756
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1636
- 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:3372
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:6024

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3820,i,2904906934812054273,11716976550456127484,262144 --variations-seed-version --mojo-platform-channel-handle=1420 /prefetch:8
1⤵
PID:5484

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
f534f038b3d36a9447da8c6d6a4f831a

SHA1
4fadcb67d9640103a99628e33d8e6744530a8517

SHA256
d14114a0f5b4f98afa7ddfc3a524ca193a5146b88acb754c5b7fa85c6539c2ad

SHA512
2cfe8f46271d1492eed6c0df9c08e3256c4ef849976477c3bc5152d57df7b9986f06ad6c4ada063ed8e6b638f3ed3f377abb611ae5a0e6461b04711e50ea68f4

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
420a0347ed335b631f37d5a2a9f43e9c

SHA1
6da034294d727b44aa8d6bf6f157f2fe53580617

SHA256
88d3576e3b3acd7f044774fc291158cab5f73e9322ea755ac3f88b3a9c971a16

SHA512
9e9cde7a08a9ed233d3a140db0de5bc2f725a9194fbdd4c734dea71fa49c4f6fadb4d4dc2b45345b0aa7e7dc1b9dae23d3eefaea2d86d3e48501503fb2b85596

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_esecknpx.gmw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3104-66-0x00000153FF300000-0x00000153FF30A000-memory.dmp

Filesize
40KB

Download
memory/3104-33-0x00000153FF320000-0x00000153FF33E000-memory.dmp

Filesize
120KB

Download
memory/3104-85-0x00007FF9CDE80000-0x00007FF9CE941000-memory.dmp

Filesize
10.8MB

Download
memory/3104-67-0x00000153FF890000-0x00000153FF8A2000-memory.dmp

Filesize
72KB

Download
memory/3104-2-0x00007FF9CDE80000-0x00007FF9CE941000-memory.dmp

Filesize
10.8MB

Download
memory/3104-31-0x00000153FF920000-0x00000153FF996000-memory.dmp

Filesize
472KB

Download
memory/3104-32-0x00000153FF820000-0x00000153FF870000-memory.dmp

Filesize
320KB

Download
memory/3104-1-0x00007FF9CDE83000-0x00007FF9CDE85000-memory.dmp

Filesize
8KB

Download
memory/3104-0-0x00000153FEEF0000-0x00000153FEF30000-memory.dmp

Filesize
256KB

Download
memory/5908-15-0x00007FF9CDE80000-0x00007FF9CE941000-memory.dmp

Filesize
10.8MB

Download
memory/5908-13-0x00000143EB0F0000-0x00000143EB112000-memory.dmp

Filesize
136KB

Download
memory/5908-3-0x00007FF9CDE80000-0x00007FF9CE941000-memory.dmp

Filesize
10.8MB

Download
memory/5908-14-0x00007FF9CDE80000-0x00007FF9CE941000-memory.dmp

Filesize
10.8MB

Download
memory/5908-18-0x00007FF9CDE80000-0x00007FF9CE941000-memory.dmp

Filesize
10.8MB

Download