umbral | cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16

Analysis

max time kernel
94s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-01-2025 14:37

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General

Target

Loader.exe
Size

496KB
MD5

5679fd7303147ee1bc6c4adc979de286
SHA1

65354bef2646e0d6536ed4ca614839c4e245ad16
SHA256

cbf4e042e45bf47e1070d666b8078444303b423ecb62fe98ee9a11c905b4fd16
SHA512

6d0f2241a55c1549cc9e02fdd7f0368548a3c933772ffb5a8a3bf47a9743470fe017f4bf6e5dad0f4b87111416418db67b6cb4a887378ee3ef88554e0f80c221
SSDEEP

12288:ZoZ1tlRk83Mlp6BpcCFdWXp8aLLy5MvOAs:q5r3bBpcCFdWXp8aLLy5yq

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3984-1-0x00000142DF2C0000-0x00000142DF342000-memory.dmp	family_umbral

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

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
4840	powershell.exe
3668	powershell.exe
5008	powershell.exe
4264	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Loader.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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
1480	cmd.exe
2220	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4508	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2220	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3984	Loader.exe
4840	powershell.exe
4840	powershell.exe
3668	powershell.exe
3668	powershell.exe
5008	powershell.exe
5008	powershell.exe
4500	powershell.exe
4500	powershell.exe
4264	powershell.exe
4264	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3984	Loader.exe
Token: SeIncreaseQuotaPrivilege	1216	wmic.exe
Token: SeSecurityPrivilege	1216	wmic.exe
Token: SeTakeOwnershipPrivilege	1216	wmic.exe
Token: SeLoadDriverPrivilege	1216	wmic.exe
Token: SeSystemProfilePrivilege	1216	wmic.exe
Token: SeSystemtimePrivilege	1216	wmic.exe
Token: SeProfSingleProcessPrivilege	1216	wmic.exe
Token: SeIncBasePriorityPrivilege	1216	wmic.exe
Token: SeCreatePagefilePrivilege	1216	wmic.exe
Token: SeBackupPrivilege	1216	wmic.exe
Token: SeRestorePrivilege	1216	wmic.exe
Token: SeShutdownPrivilege	1216	wmic.exe
Token: SeDebugPrivilege	1216	wmic.exe
Token: SeSystemEnvironmentPrivilege	1216	wmic.exe
Token: SeRemoteShutdownPrivilege	1216	wmic.exe
Token: SeUndockPrivilege	1216	wmic.exe
Token: SeManageVolumePrivilege	1216	wmic.exe
Token: 33	1216	wmic.exe
Token: 34	1216	wmic.exe
Token: 35	1216	wmic.exe
Token: 36	1216	wmic.exe
Token: SeIncreaseQuotaPrivilege	1216	wmic.exe
Token: SeSecurityPrivilege	1216	wmic.exe
Token: SeTakeOwnershipPrivilege	1216	wmic.exe
Token: SeLoadDriverPrivilege	1216	wmic.exe
Token: SeSystemProfilePrivilege	1216	wmic.exe
Token: SeSystemtimePrivilege	1216	wmic.exe
Token: SeProfSingleProcessPrivilege	1216	wmic.exe
Token: SeIncBasePriorityPrivilege	1216	wmic.exe
Token: SeCreatePagefilePrivilege	1216	wmic.exe
Token: SeBackupPrivilege	1216	wmic.exe
Token: SeRestorePrivilege	1216	wmic.exe
Token: SeShutdownPrivilege	1216	wmic.exe
Token: SeDebugPrivilege	1216	wmic.exe
Token: SeSystemEnvironmentPrivilege	1216	wmic.exe
Token: SeRemoteShutdownPrivilege	1216	wmic.exe
Token: SeUndockPrivilege	1216	wmic.exe
Token: SeManageVolumePrivilege	1216	wmic.exe
Token: 33	1216	wmic.exe
Token: 34	1216	wmic.exe
Token: 35	1216	wmic.exe
Token: 36	1216	wmic.exe
Token: SeDebugPrivilege	4840	powershell.exe
Token: SeDebugPrivilege	3668	powershell.exe
Token: SeDebugPrivilege	5008	powershell.exe
Token: SeDebugPrivilege	4500	powershell.exe
Token: SeIncreaseQuotaPrivilege	4560	wmic.exe
Token: SeSecurityPrivilege	4560	wmic.exe
Token: SeTakeOwnershipPrivilege	4560	wmic.exe
Token: SeLoadDriverPrivilege	4560	wmic.exe
Token: SeSystemProfilePrivilege	4560	wmic.exe
Token: SeSystemtimePrivilege	4560	wmic.exe
Token: SeProfSingleProcessPrivilege	4560	wmic.exe
Token: SeIncBasePriorityPrivilege	4560	wmic.exe
Token: SeCreatePagefilePrivilege	4560	wmic.exe
Token: SeBackupPrivilege	4560	wmic.exe
Token: SeRestorePrivilege	4560	wmic.exe
Token: SeShutdownPrivilege	4560	wmic.exe
Token: SeDebugPrivilege	4560	wmic.exe
Token: SeSystemEnvironmentPrivilege	4560	wmic.exe
Token: SeRemoteShutdownPrivilege	4560	wmic.exe
Token: SeUndockPrivilege	4560	wmic.exe
Token: SeManageVolumePrivilege	4560	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3984 wrote to memory of 1216	3984	Loader.exe	83
PID 3984 wrote to memory of 1216	3984	Loader.exe	83
PID 3984 wrote to memory of 3024	3984	Loader.exe	86
PID 3984 wrote to memory of 3024	3984	Loader.exe	86
PID 3984 wrote to memory of 4840	3984	Loader.exe	88
PID 3984 wrote to memory of 4840	3984	Loader.exe	88
PID 3984 wrote to memory of 3668	3984	Loader.exe	90
PID 3984 wrote to memory of 3668	3984	Loader.exe	90
PID 3984 wrote to memory of 5008	3984	Loader.exe	92
PID 3984 wrote to memory of 5008	3984	Loader.exe	92
PID 3984 wrote to memory of 4500	3984	Loader.exe	94
PID 3984 wrote to memory of 4500	3984	Loader.exe	94
PID 3984 wrote to memory of 4560	3984	Loader.exe	97
PID 3984 wrote to memory of 4560	3984	Loader.exe	97
PID 3984 wrote to memory of 4424	3984	Loader.exe	99
PID 3984 wrote to memory of 4424	3984	Loader.exe	99
PID 3984 wrote to memory of 3596	3984	Loader.exe	101
PID 3984 wrote to memory of 3596	3984	Loader.exe	101
PID 3984 wrote to memory of 4264	3984	Loader.exe	103
PID 3984 wrote to memory of 4264	3984	Loader.exe	103
PID 3984 wrote to memory of 4508	3984	Loader.exe	105
PID 3984 wrote to memory of 4508	3984	Loader.exe	105
PID 3984 wrote to memory of 1480	3984	Loader.exe	107
PID 3984 wrote to memory of 1480	3984	Loader.exe	107
PID 1480 wrote to memory of 2220	1480	cmd.exe	109
PID 1480 wrote to memory of 2220	1480	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3024	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3984
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1216
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
  2⤵
  - Views/modifies file attributes
  PID:3024
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4840
- 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:3668
- 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:5008
- 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:4500
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4560
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4424
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3596
- 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:4264
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4508
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Loader.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1480
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2220

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

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
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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
77fad1dec6867fb7dd395c25c46d8ae5

SHA1
abfecfd6c63bb35ec88d98ef210adefc139d793e

SHA256
02b0ab469998ac630b421de245ee243599422e7f2c2f9714085fc5b837891784

SHA512
ac8d9d660992d076e46ffdb7422d4916789a7ca2f5737c711449f518745dee197ed1c08e50f81f92cb7d2d1ea94fe024e77a8295e1be05c5a49a0fd7495776d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zwgz3x5a.dkt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3984-72-0x00000142F9A00000-0x00000142F9A0A000-memory.dmp

Filesize
40KB

Download
memory/3984-35-0x00000142E1070000-0x00000142E108E000-memory.dmp

Filesize
120KB

Download
memory/3984-95-0x00007FFE440C0000-0x00007FFE44B81000-memory.dmp

Filesize
10.8MB

Download
memory/3984-90-0x00007FFE440C0000-0x00007FFE44B81000-memory.dmp

Filesize
10.8MB

Download
memory/3984-2-0x00007FFE440C0000-0x00007FFE44B81000-memory.dmp

Filesize
10.8MB

Download
memory/3984-33-0x00000142F9A80000-0x00000142F9AF6000-memory.dmp

Filesize
472KB

Download
memory/3984-34-0x00000142F9B00000-0x00000142F9B50000-memory.dmp

Filesize
320KB

Download
memory/3984-89-0x00007FFE440C3000-0x00007FFE440C5000-memory.dmp

Filesize
8KB

Download
memory/3984-1-0x00000142DF2C0000-0x00000142DF342000-memory.dmp

Filesize
520KB

Download
memory/3984-0-0x00007FFE440C3000-0x00007FFE440C5000-memory.dmp

Filesize
8KB

Download
memory/3984-73-0x00000142F9A30000-0x00000142F9A42000-memory.dmp

Filesize
72KB

Download
memory/4840-4-0x00007FFE440C0000-0x00007FFE44B81000-memory.dmp

Filesize
10.8MB

Download
memory/4840-10-0x000001C28C9D0000-0x000001C28C9F2000-memory.dmp

Filesize
136KB

Download
memory/4840-15-0x00007FFE440C0000-0x00007FFE44B81000-memory.dmp

Filesize
10.8MB

Download
memory/4840-3-0x00007FFE440C0000-0x00007FFE44B81000-memory.dmp

Filesize
10.8MB

Download
memory/4840-18-0x00007FFE440C0000-0x00007FFE44B81000-memory.dmp

Filesize
10.8MB

Download