umbral | 2b49183d5f11acec481c4de2bbf9f7059f2a99137c0d26852be34a8a992275c8

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
02-05-2024 11:31

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General

Target

release.exe
Size

234KB
MD5

d3b91f66624b3bc4d6fdc49e7ed650e8
SHA1

cbe16636131cd52582078775d46f309c4f3a6164
SHA256

2b49183d5f11acec481c4de2bbf9f7059f2a99137c0d26852be34a8a992275c8
SHA512

c2215aa8a089c26bd45f96673ce165bf1e9c937a0b54742e4b01c6f79165f5875ef5e7bde86b80d988e38d2379cab14ac3aef920a3844bb09a51f7eacd8a6f10
SSDEEP

6144:HloZM+rIkd8g+EtXHkv/iD4evkQrRiK1rwBzOur8lb8e1mTYaij:FoZtL+EP8evkQrRiK1rwBzOurcFf

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1016-0-0x000001A3BC890000-0x000001A3BC8D0000-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
4572	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	release.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
20	discord.com
21	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
3	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
876	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4684	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1016	release.exe
4572	powershell.exe
4572	powershell.exe
4452	powershell.exe
4452	powershell.exe
1976	powershell.exe
1976	powershell.exe
2080	powershell.exe
2080	powershell.exe
4220	powershell.exe
4220	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1016	release.exe
Token: SeIncreaseQuotaPrivilege	1424	wmic.exe
Token: SeSecurityPrivilege	1424	wmic.exe
Token: SeTakeOwnershipPrivilege	1424	wmic.exe
Token: SeLoadDriverPrivilege	1424	wmic.exe
Token: SeSystemProfilePrivilege	1424	wmic.exe
Token: SeSystemtimePrivilege	1424	wmic.exe
Token: SeProfSingleProcessPrivilege	1424	wmic.exe
Token: SeIncBasePriorityPrivilege	1424	wmic.exe
Token: SeCreatePagefilePrivilege	1424	wmic.exe
Token: SeBackupPrivilege	1424	wmic.exe
Token: SeRestorePrivilege	1424	wmic.exe
Token: SeShutdownPrivilege	1424	wmic.exe
Token: SeDebugPrivilege	1424	wmic.exe
Token: SeSystemEnvironmentPrivilege	1424	wmic.exe
Token: SeRemoteShutdownPrivilege	1424	wmic.exe
Token: SeUndockPrivilege	1424	wmic.exe
Token: SeManageVolumePrivilege	1424	wmic.exe
Token: 33	1424	wmic.exe
Token: 34	1424	wmic.exe
Token: 35	1424	wmic.exe
Token: 36	1424	wmic.exe
Token: SeIncreaseQuotaPrivilege	1424	wmic.exe
Token: SeSecurityPrivilege	1424	wmic.exe
Token: SeTakeOwnershipPrivilege	1424	wmic.exe
Token: SeLoadDriverPrivilege	1424	wmic.exe
Token: SeSystemProfilePrivilege	1424	wmic.exe
Token: SeSystemtimePrivilege	1424	wmic.exe
Token: SeProfSingleProcessPrivilege	1424	wmic.exe
Token: SeIncBasePriorityPrivilege	1424	wmic.exe
Token: SeCreatePagefilePrivilege	1424	wmic.exe
Token: SeBackupPrivilege	1424	wmic.exe
Token: SeRestorePrivilege	1424	wmic.exe
Token: SeShutdownPrivilege	1424	wmic.exe
Token: SeDebugPrivilege	1424	wmic.exe
Token: SeSystemEnvironmentPrivilege	1424	wmic.exe
Token: SeRemoteShutdownPrivilege	1424	wmic.exe
Token: SeUndockPrivilege	1424	wmic.exe
Token: SeManageVolumePrivilege	1424	wmic.exe
Token: 33	1424	wmic.exe
Token: 34	1424	wmic.exe
Token: 35	1424	wmic.exe
Token: 36	1424	wmic.exe
Token: SeDebugPrivilege	4572	powershell.exe
Token: SeDebugPrivilege	4452	powershell.exe
Token: SeDebugPrivilege	1976	powershell.exe
Token: SeDebugPrivilege	2080	powershell.exe
Token: SeIncreaseQuotaPrivilege	4132	wmic.exe
Token: SeSecurityPrivilege	4132	wmic.exe
Token: SeTakeOwnershipPrivilege	4132	wmic.exe
Token: SeLoadDriverPrivilege	4132	wmic.exe
Token: SeSystemProfilePrivilege	4132	wmic.exe
Token: SeSystemtimePrivilege	4132	wmic.exe
Token: SeProfSingleProcessPrivilege	4132	wmic.exe
Token: SeIncBasePriorityPrivilege	4132	wmic.exe
Token: SeCreatePagefilePrivilege	4132	wmic.exe
Token: SeBackupPrivilege	4132	wmic.exe
Token: SeRestorePrivilege	4132	wmic.exe
Token: SeShutdownPrivilege	4132	wmic.exe
Token: SeDebugPrivilege	4132	wmic.exe
Token: SeSystemEnvironmentPrivilege	4132	wmic.exe
Token: SeRemoteShutdownPrivilege	4132	wmic.exe
Token: SeUndockPrivilege	4132	wmic.exe
Token: SeManageVolumePrivilege	4132	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1016 wrote to memory of 1424	1016	release.exe	84
PID 1016 wrote to memory of 1424	1016	release.exe	84
PID 1016 wrote to memory of 976	1016	release.exe	88
PID 1016 wrote to memory of 976	1016	release.exe	88
PID 1016 wrote to memory of 4572	1016	release.exe	90
PID 1016 wrote to memory of 4572	1016	release.exe	90
PID 1016 wrote to memory of 4452	1016	release.exe	92
PID 1016 wrote to memory of 4452	1016	release.exe	92
PID 1016 wrote to memory of 1976	1016	release.exe	94
PID 1016 wrote to memory of 1976	1016	release.exe	94
PID 1016 wrote to memory of 2080	1016	release.exe	96
PID 1016 wrote to memory of 2080	1016	release.exe	96
PID 1016 wrote to memory of 4132	1016	release.exe	98
PID 1016 wrote to memory of 4132	1016	release.exe	98
PID 1016 wrote to memory of 1668	1016	release.exe	100
PID 1016 wrote to memory of 1668	1016	release.exe	100
PID 1016 wrote to memory of 4272	1016	release.exe	102
PID 1016 wrote to memory of 4272	1016	release.exe	102
PID 1016 wrote to memory of 4220	1016	release.exe	104
PID 1016 wrote to memory of 4220	1016	release.exe	104
PID 1016 wrote to memory of 876	1016	release.exe	106
PID 1016 wrote to memory of 876	1016	release.exe	106
PID 1016 wrote to memory of 1904	1016	release.exe	108
PID 1016 wrote to memory of 1904	1016	release.exe	108
PID 1904 wrote to memory of 4684	1904	cmd.exe	110
PID 1904 wrote to memory of 4684	1904	cmd.exe	110

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
976	attrib.exe

C:\Users\Admin\AppData\Local\Temp\release.exe
"C:\Users\Admin\AppData\Local\Temp\release.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1016
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1424
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\release.exe"
  2⤵
  - Views/modifies file attributes
  PID:976
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\release.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4572
- 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:4452
- 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:1976
- 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:2080
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4132
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1668
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4272
- 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:4220
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:876
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\release.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1904
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4684

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

Replay Monitor

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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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
4e0b2e50101436c689a1789a647387b9

SHA1
a72b79a704ebba858596167f11e0c91b0041e5ac

SHA256
0cc8452772ec196bc7ceb9d0deab830230b12eeb71bde20c6912727848d4150e

SHA512
6f2bb9e471aab9104181640ed5be9dba1a8aae01881db361e8fa1dd33cb0343e38761eed35d635da05995d4a9e0965f2a002c469f540587cf9f965489deb7e0b

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_urczk53r.mk0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1016-72-0x000001A3D70A0000-0x000001A3D70B2000-memory.dmp

Filesize
72KB

Download
memory/1016-35-0x000001A3D6E70000-0x000001A3D6E8E000-memory.dmp

Filesize
120KB

Download
memory/1016-90-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

Filesize
10.8MB

Download
memory/1016-71-0x000001A3D6E50000-0x000001A3D6E5A000-memory.dmp

Filesize
40KB

Download
memory/1016-2-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

Filesize
10.8MB

Download
memory/1016-33-0x000001A3D7000000-0x000001A3D7076000-memory.dmp

Filesize
472KB

Download
memory/1016-34-0x000001A3D6EA0000-0x000001A3D6EF0000-memory.dmp

Filesize
320KB

Download
memory/1016-0-0x000001A3BC890000-0x000001A3BC8D0000-memory.dmp

Filesize
256KB

Download
memory/1016-1-0x00007FFD900B3000-0x00007FFD900B5000-memory.dmp

Filesize
8KB

Download
memory/4572-15-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

Filesize
10.8MB

Download
memory/4572-14-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

Filesize
10.8MB

Download
memory/4572-3-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

Filesize
10.8MB

Download
memory/4572-13-0x00000199295A0000-0x00000199295C2000-memory.dmp

Filesize
136KB

Download
memory/4572-18-0x00007FFD900B0000-0x00007FFD90B71000-memory.dmp

Filesize
10.8MB

Download