umbral | ea94a87b1828d33c0fd1b075ecfdf3cde3856c3b3f173f10c4618e306f1970f8

Analysis

max time kernel
141s
max time network
126s
platform
windows11-21h2_x64
resource
win11-20240611-en
resource tags

arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
submitted
23-06-2024 20:18

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General

Target

release05262024.exe
Size

234KB
MD5

550cecea767138fcf54daabc6af64ff1
SHA1

1b63a5be8367b98d68a3cb190542b65084c22fdb
SHA256

ea94a87b1828d33c0fd1b075ecfdf3cde3856c3b3f173f10c4618e306f1970f8
SHA512

41f94f4845608311908e3abf8640fa9745d368289163304d6759cbf9a94894c3256ce0159b7fb3b612f6cc5432d34ae4571174ace831fa4bd0b3ebe1426ddf3b
SSDEEP

6144:XloZM+rIkd8g+EtXHkv/iD4ZgdtNbYMTvqL9Y0hZOb8e1mXzi4:1oZtL+EP8ZgdtNbYMTvqL9Y0hc6e

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4172-0-0x000001C3E51C0000-0x000001C3E5200000-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
3744	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	release05262024.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
5	discord.com
20	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4664	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1412	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4172	release05262024.exe
3744	powershell.exe
3744	powershell.exe
1112	powershell.exe
1112	powershell.exe
672	powershell.exe
672	powershell.exe
4908	powershell.exe
4908	powershell.exe
2732	powershell.exe
2732	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4172	release05262024.exe
Token: SeIncreaseQuotaPrivilege	4800	wmic.exe
Token: SeSecurityPrivilege	4800	wmic.exe
Token: SeTakeOwnershipPrivilege	4800	wmic.exe
Token: SeLoadDriverPrivilege	4800	wmic.exe
Token: SeSystemProfilePrivilege	4800	wmic.exe
Token: SeSystemtimePrivilege	4800	wmic.exe
Token: SeProfSingleProcessPrivilege	4800	wmic.exe
Token: SeIncBasePriorityPrivilege	4800	wmic.exe
Token: SeCreatePagefilePrivilege	4800	wmic.exe
Token: SeBackupPrivilege	4800	wmic.exe
Token: SeRestorePrivilege	4800	wmic.exe
Token: SeShutdownPrivilege	4800	wmic.exe
Token: SeDebugPrivilege	4800	wmic.exe
Token: SeSystemEnvironmentPrivilege	4800	wmic.exe
Token: SeRemoteShutdownPrivilege	4800	wmic.exe
Token: SeUndockPrivilege	4800	wmic.exe
Token: SeManageVolumePrivilege	4800	wmic.exe
Token: 33	4800	wmic.exe
Token: 34	4800	wmic.exe
Token: 35	4800	wmic.exe
Token: 36	4800	wmic.exe
Token: SeIncreaseQuotaPrivilege	4800	wmic.exe
Token: SeSecurityPrivilege	4800	wmic.exe
Token: SeTakeOwnershipPrivilege	4800	wmic.exe
Token: SeLoadDriverPrivilege	4800	wmic.exe
Token: SeSystemProfilePrivilege	4800	wmic.exe
Token: SeSystemtimePrivilege	4800	wmic.exe
Token: SeProfSingleProcessPrivilege	4800	wmic.exe
Token: SeIncBasePriorityPrivilege	4800	wmic.exe
Token: SeCreatePagefilePrivilege	4800	wmic.exe
Token: SeBackupPrivilege	4800	wmic.exe
Token: SeRestorePrivilege	4800	wmic.exe
Token: SeShutdownPrivilege	4800	wmic.exe
Token: SeDebugPrivilege	4800	wmic.exe
Token: SeSystemEnvironmentPrivilege	4800	wmic.exe
Token: SeRemoteShutdownPrivilege	4800	wmic.exe
Token: SeUndockPrivilege	4800	wmic.exe
Token: SeManageVolumePrivilege	4800	wmic.exe
Token: 33	4800	wmic.exe
Token: 34	4800	wmic.exe
Token: 35	4800	wmic.exe
Token: 36	4800	wmic.exe
Token: SeDebugPrivilege	3744	powershell.exe
Token: SeDebugPrivilege	1112	powershell.exe
Token: SeDebugPrivilege	672	powershell.exe
Token: SeDebugPrivilege	4908	powershell.exe
Token: SeIncreaseQuotaPrivilege	332	wmic.exe
Token: SeSecurityPrivilege	332	wmic.exe
Token: SeTakeOwnershipPrivilege	332	wmic.exe
Token: SeLoadDriverPrivilege	332	wmic.exe
Token: SeSystemProfilePrivilege	332	wmic.exe
Token: SeSystemtimePrivilege	332	wmic.exe
Token: SeProfSingleProcessPrivilege	332	wmic.exe
Token: SeIncBasePriorityPrivilege	332	wmic.exe
Token: SeCreatePagefilePrivilege	332	wmic.exe
Token: SeBackupPrivilege	332	wmic.exe
Token: SeRestorePrivilege	332	wmic.exe
Token: SeShutdownPrivilege	332	wmic.exe
Token: SeDebugPrivilege	332	wmic.exe
Token: SeSystemEnvironmentPrivilege	332	wmic.exe
Token: SeRemoteShutdownPrivilege	332	wmic.exe
Token: SeUndockPrivilege	332	wmic.exe
Token: SeManageVolumePrivilege	332	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4172 wrote to memory of 4800	4172	release05262024.exe	80
PID 4172 wrote to memory of 4800	4172	release05262024.exe	80
PID 4172 wrote to memory of 4760	4172	release05262024.exe	83
PID 4172 wrote to memory of 4760	4172	release05262024.exe	83
PID 4172 wrote to memory of 3744	4172	release05262024.exe	85
PID 4172 wrote to memory of 3744	4172	release05262024.exe	85
PID 4172 wrote to memory of 1112	4172	release05262024.exe	87
PID 4172 wrote to memory of 1112	4172	release05262024.exe	87
PID 4172 wrote to memory of 672	4172	release05262024.exe	89
PID 4172 wrote to memory of 672	4172	release05262024.exe	89
PID 4172 wrote to memory of 4908	4172	release05262024.exe	91
PID 4172 wrote to memory of 4908	4172	release05262024.exe	91
PID 4172 wrote to memory of 332	4172	release05262024.exe	93
PID 4172 wrote to memory of 332	4172	release05262024.exe	93
PID 4172 wrote to memory of 4688	4172	release05262024.exe	95
PID 4172 wrote to memory of 4688	4172	release05262024.exe	95
PID 4172 wrote to memory of 1108	4172	release05262024.exe	98
PID 4172 wrote to memory of 1108	4172	release05262024.exe	98
PID 4172 wrote to memory of 2732	4172	release05262024.exe	100
PID 4172 wrote to memory of 2732	4172	release05262024.exe	100
PID 4172 wrote to memory of 4664	4172	release05262024.exe	102
PID 4172 wrote to memory of 4664	4172	release05262024.exe	102
PID 4172 wrote to memory of 3976	4172	release05262024.exe	105
PID 4172 wrote to memory of 3976	4172	release05262024.exe	105
PID 3976 wrote to memory of 1412	3976	cmd.exe	107
PID 3976 wrote to memory of 1412	3976	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4760	attrib.exe

C:\Users\Admin\AppData\Local\Temp\release05262024.exe
"C:\Users\Admin\AppData\Local\Temp\release05262024.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4172
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4800
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\release05262024.exe"
  2⤵
  - Views/modifies file attributes
  PID:4760
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\release05262024.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3744
- 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:1112
- 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:672
- 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:4908
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4688
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1108
- 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:2732
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4664
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\release05262024.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3976
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1412

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

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
45741c307af2576c6437c5fdb24ef9ce

SHA1
a6ba7a7705db14ac29a18a98dd7deb4cc759c3bf

SHA256
7887859f7179e194ff9b78f8d8fa3830790110a01597f21ff48c84cd935e49d2

SHA512
39fdc5931563cbf826e8b643b5f0dcdf45bb6f95a8eeb460499257ca41b3dbee4c692eaacc3fd33bddf4b6ff0c828981ed7e9cd080007bbb9f0b28e7d0d66941

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
63e54ca6551a4a091cca75d55e9122b2

SHA1
7afd34b6d2008fec2a36d984d535aea7406a66ce

SHA256
e263f5f17c235debb019644319a773d5feabd2f80fdb3d7783762ba572fe875b

SHA512
22e332795de470945a1864cfe32e90cd993554cf139467610abdb20b1608c2a7e0177f001b2b6f0032daa780980207943b6e1e4f0960e0576a1aea76fd1dd13e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vp1tuciv.g40.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3744-11-0x000002665F170000-0x000002665F192000-memory.dmp

Filesize
136KB

Download
memory/3744-13-0x00007FFF3C060000-0x00007FFF3CB22000-memory.dmp

Filesize
10.8MB

Download
memory/3744-14-0x00007FFF3C060000-0x00007FFF3CB22000-memory.dmp

Filesize
10.8MB

Download
memory/3744-17-0x00007FFF3C060000-0x00007FFF3CB22000-memory.dmp

Filesize
10.8MB

Download
memory/3744-12-0x00007FFF3C060000-0x00007FFF3CB22000-memory.dmp

Filesize
10.8MB

Download
memory/4172-32-0x000001C3FFA10000-0x000001C3FFA60000-memory.dmp

Filesize
320KB

Download
memory/4172-31-0x000001C3FF990000-0x000001C3FFA06000-memory.dmp

Filesize
472KB

Download
memory/4172-33-0x000001C3FF910000-0x000001C3FF92E000-memory.dmp

Filesize
120KB

Download
memory/4172-1-0x00007FFF3C063000-0x00007FFF3C065000-memory.dmp

Filesize
8KB

Download
memory/4172-0-0x000001C3E51C0000-0x000001C3E5200000-memory.dmp

Filesize
256KB

Download
memory/4172-68-0x000001C3E6FC0000-0x000001C3E6FCA000-memory.dmp

Filesize
40KB

Download
memory/4172-69-0x000001C3FF950000-0x000001C3FF962000-memory.dmp

Filesize
72KB

Download
memory/4172-2-0x00007FFF3C060000-0x00007FFF3CB22000-memory.dmp

Filesize
10.8MB

Download
memory/4172-88-0x00007FFF3C060000-0x00007FFF3CB22000-memory.dmp

Filesize
10.8MB

Download