umbral | 3fc208899b7c2f6208b31ead1b538808dac5fbcc79de62ca867ee0f27064e6ac

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
18-07-2024 21:11

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General

Target

Umbral.exe
Size

229KB
MD5

47a00d21a6b9b87b9ff9d9190d820531
SHA1

f70756addfdffe4333ea2811233c15c3923a3a2f
SHA256

3fc208899b7c2f6208b31ead1b538808dac5fbcc79de62ca867ee0f27064e6ac
SHA512

b9cbcf10cd9024449524a3554f37cf73bbdf9c983a7c2cfe605eb581902eb9c7e450277e9d627607c2ad369fd415ec141109559a3371198d5ee0a37d2d21a2cc
SSDEEP

6144:lloZMLrIkd8g+EtXHkv/iD4lAMc1aYe5xyRXKYZd8l0b8e1maqvRei:noZ0L+EP8WMc1aYe5xyRXKYZd8WJqvRT

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/808-0-0x0000026C279B0000-0x0000026C279F0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1708	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
30	discord.com
31	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4636	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
808	Umbral.exe
1708	powershell.exe
1708	powershell.exe
4404	powershell.exe
4404	powershell.exe
4492	powershell.exe
4492	powershell.exe
216	powershell.exe
216	powershell.exe
5088	powershell.exe
5088	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	808	Umbral.exe
Token: SeIncreaseQuotaPrivilege	3240	wmic.exe
Token: SeSecurityPrivilege	3240	wmic.exe
Token: SeTakeOwnershipPrivilege	3240	wmic.exe
Token: SeLoadDriverPrivilege	3240	wmic.exe
Token: SeSystemProfilePrivilege	3240	wmic.exe
Token: SeSystemtimePrivilege	3240	wmic.exe
Token: SeProfSingleProcessPrivilege	3240	wmic.exe
Token: SeIncBasePriorityPrivilege	3240	wmic.exe
Token: SeCreatePagefilePrivilege	3240	wmic.exe
Token: SeBackupPrivilege	3240	wmic.exe
Token: SeRestorePrivilege	3240	wmic.exe
Token: SeShutdownPrivilege	3240	wmic.exe
Token: SeDebugPrivilege	3240	wmic.exe
Token: SeSystemEnvironmentPrivilege	3240	wmic.exe
Token: SeRemoteShutdownPrivilege	3240	wmic.exe
Token: SeUndockPrivilege	3240	wmic.exe
Token: SeManageVolumePrivilege	3240	wmic.exe
Token: 33	3240	wmic.exe
Token: 34	3240	wmic.exe
Token: 35	3240	wmic.exe
Token: 36	3240	wmic.exe
Token: SeIncreaseQuotaPrivilege	3240	wmic.exe
Token: SeSecurityPrivilege	3240	wmic.exe
Token: SeTakeOwnershipPrivilege	3240	wmic.exe
Token: SeLoadDriverPrivilege	3240	wmic.exe
Token: SeSystemProfilePrivilege	3240	wmic.exe
Token: SeSystemtimePrivilege	3240	wmic.exe
Token: SeProfSingleProcessPrivilege	3240	wmic.exe
Token: SeIncBasePriorityPrivilege	3240	wmic.exe
Token: SeCreatePagefilePrivilege	3240	wmic.exe
Token: SeBackupPrivilege	3240	wmic.exe
Token: SeRestorePrivilege	3240	wmic.exe
Token: SeShutdownPrivilege	3240	wmic.exe
Token: SeDebugPrivilege	3240	wmic.exe
Token: SeSystemEnvironmentPrivilege	3240	wmic.exe
Token: SeRemoteShutdownPrivilege	3240	wmic.exe
Token: SeUndockPrivilege	3240	wmic.exe
Token: SeManageVolumePrivilege	3240	wmic.exe
Token: 33	3240	wmic.exe
Token: 34	3240	wmic.exe
Token: 35	3240	wmic.exe
Token: 36	3240	wmic.exe
Token: SeDebugPrivilege	1708	powershell.exe
Token: SeDebugPrivilege	4404	powershell.exe
Token: SeDebugPrivilege	4492	powershell.exe
Token: SeDebugPrivilege	216	powershell.exe
Token: SeIncreaseQuotaPrivilege	3412	wmic.exe
Token: SeSecurityPrivilege	3412	wmic.exe
Token: SeTakeOwnershipPrivilege	3412	wmic.exe
Token: SeLoadDriverPrivilege	3412	wmic.exe
Token: SeSystemProfilePrivilege	3412	wmic.exe
Token: SeSystemtimePrivilege	3412	wmic.exe
Token: SeProfSingleProcessPrivilege	3412	wmic.exe
Token: SeIncBasePriorityPrivilege	3412	wmic.exe
Token: SeCreatePagefilePrivilege	3412	wmic.exe
Token: SeBackupPrivilege	3412	wmic.exe
Token: SeRestorePrivilege	3412	wmic.exe
Token: SeShutdownPrivilege	3412	wmic.exe
Token: SeDebugPrivilege	3412	wmic.exe
Token: SeSystemEnvironmentPrivilege	3412	wmic.exe
Token: SeRemoteShutdownPrivilege	3412	wmic.exe
Token: SeUndockPrivilege	3412	wmic.exe
Token: SeManageVolumePrivilege	3412	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 808 wrote to memory of 3240	808	Umbral.exe	85
PID 808 wrote to memory of 3240	808	Umbral.exe	85
PID 808 wrote to memory of 1708	808	Umbral.exe	90
PID 808 wrote to memory of 1708	808	Umbral.exe	90
PID 808 wrote to memory of 4404	808	Umbral.exe	92
PID 808 wrote to memory of 4404	808	Umbral.exe	92
PID 808 wrote to memory of 4492	808	Umbral.exe	94
PID 808 wrote to memory of 4492	808	Umbral.exe	94
PID 808 wrote to memory of 216	808	Umbral.exe	96
PID 808 wrote to memory of 216	808	Umbral.exe	96
PID 808 wrote to memory of 3412	808	Umbral.exe	100
PID 808 wrote to memory of 3412	808	Umbral.exe	100
PID 808 wrote to memory of 3460	808	Umbral.exe	102
PID 808 wrote to memory of 3460	808	Umbral.exe	102
PID 808 wrote to memory of 2544	808	Umbral.exe	104
PID 808 wrote to memory of 2544	808	Umbral.exe	104
PID 808 wrote to memory of 5088	808	Umbral.exe	107
PID 808 wrote to memory of 5088	808	Umbral.exe	107
PID 808 wrote to memory of 4636	808	Umbral.exe	109
PID 808 wrote to memory of 4636	808	Umbral.exe	109

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:808
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3240
- 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:1708
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4404
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4492
- 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:216
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3460
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2544
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:5088
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4636

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

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
d4a2f28ade8dd97f0adb0f71cc027c2d

SHA1
204f23cd6e8afb444711b24a77e5ad12a215042f

SHA256
feb979bbc240009176d8263f786083ea987071229008d0fdca424404b00d06ea

SHA512
729b70695712a6a19d6c5428a8dcab04acc4f8af61f620d5b049459a7c643c0d081b585beedca10d97a3ffa208106e48b5e2719972f31b695ed1956d7eff155a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3bfpnnna.gv2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/808-72-0x0000026C421B0000-0x0000026C421C2000-memory.dmp

Filesize
72KB

Download
memory/808-35-0x0000026C42060000-0x0000026C4207E000-memory.dmp

Filesize
120KB

Download
memory/808-90-0x00007FFE58870000-0x00007FFE59331000-memory.dmp

Filesize
10.8MB

Download
memory/808-71-0x0000026C420A0000-0x0000026C420AA000-memory.dmp

Filesize
40KB

Download
memory/808-2-0x00007FFE58870000-0x00007FFE59331000-memory.dmp

Filesize
10.8MB

Download
memory/808-33-0x0000026C420E0000-0x0000026C42156000-memory.dmp

Filesize
472KB

Download
memory/808-34-0x0000026C42160000-0x0000026C421B0000-memory.dmp

Filesize
320KB

Download
memory/808-0-0x0000026C279B0000-0x0000026C279F0000-memory.dmp

Filesize
256KB

Download
memory/808-1-0x00007FFE58873000-0x00007FFE58875000-memory.dmp

Filesize
8KB

Download
memory/1708-15-0x00007FFE58870000-0x00007FFE59331000-memory.dmp

Filesize
10.8MB

Download
memory/1708-4-0x00007FFE58870000-0x00007FFE59331000-memory.dmp

Filesize
10.8MB

Download
memory/1708-3-0x0000021DA80C0000-0x0000021DA80E2000-memory.dmp

Filesize
136KB

Download
memory/1708-14-0x00007FFE58870000-0x00007FFE59331000-memory.dmp

Filesize
10.8MB

Download
memory/1708-18-0x00007FFE58870000-0x00007FFE59331000-memory.dmp

Filesize
10.8MB

Download