umbral | ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

Analysis

max time kernel
93s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
16-11-2024 03:14

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General

Target

b5uEJHZB6Rl.exe
Size

231KB
MD5

438289fb9c72ed39bf5497f9af21ec7a
SHA1

8120391ecb41ed6a4c6ef0b259776e59311d6997
SHA256

ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85
SHA512

3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0
SSDEEP

6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3668-1-0x0000019C9CF20000-0x0000019C9CF60000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2796	powershell.exe
2692	powershell.exe
4884	powershell.exe
3328	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b5uEJHZB6Rl.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
21	discord.com
22	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
10	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
2036	cmd.exe
2576	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3884	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2576	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3668	b5uEJHZB6Rl.exe
3328	powershell.exe
3328	powershell.exe
2796	powershell.exe
2796	powershell.exe
2692	powershell.exe
2692	powershell.exe
4484	powershell.exe
4484	powershell.exe
4884	powershell.exe
4884	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3668	b5uEJHZB6Rl.exe
Token: SeIncreaseQuotaPrivilege	1016	wmic.exe
Token: SeSecurityPrivilege	1016	wmic.exe
Token: SeTakeOwnershipPrivilege	1016	wmic.exe
Token: SeLoadDriverPrivilege	1016	wmic.exe
Token: SeSystemProfilePrivilege	1016	wmic.exe
Token: SeSystemtimePrivilege	1016	wmic.exe
Token: SeProfSingleProcessPrivilege	1016	wmic.exe
Token: SeIncBasePriorityPrivilege	1016	wmic.exe
Token: SeCreatePagefilePrivilege	1016	wmic.exe
Token: SeBackupPrivilege	1016	wmic.exe
Token: SeRestorePrivilege	1016	wmic.exe
Token: SeShutdownPrivilege	1016	wmic.exe
Token: SeDebugPrivilege	1016	wmic.exe
Token: SeSystemEnvironmentPrivilege	1016	wmic.exe
Token: SeRemoteShutdownPrivilege	1016	wmic.exe
Token: SeUndockPrivilege	1016	wmic.exe
Token: SeManageVolumePrivilege	1016	wmic.exe
Token: 33	1016	wmic.exe
Token: 34	1016	wmic.exe
Token: 35	1016	wmic.exe
Token: 36	1016	wmic.exe
Token: SeIncreaseQuotaPrivilege	1016	wmic.exe
Token: SeSecurityPrivilege	1016	wmic.exe
Token: SeTakeOwnershipPrivilege	1016	wmic.exe
Token: SeLoadDriverPrivilege	1016	wmic.exe
Token: SeSystemProfilePrivilege	1016	wmic.exe
Token: SeSystemtimePrivilege	1016	wmic.exe
Token: SeProfSingleProcessPrivilege	1016	wmic.exe
Token: SeIncBasePriorityPrivilege	1016	wmic.exe
Token: SeCreatePagefilePrivilege	1016	wmic.exe
Token: SeBackupPrivilege	1016	wmic.exe
Token: SeRestorePrivilege	1016	wmic.exe
Token: SeShutdownPrivilege	1016	wmic.exe
Token: SeDebugPrivilege	1016	wmic.exe
Token: SeSystemEnvironmentPrivilege	1016	wmic.exe
Token: SeRemoteShutdownPrivilege	1016	wmic.exe
Token: SeUndockPrivilege	1016	wmic.exe
Token: SeManageVolumePrivilege	1016	wmic.exe
Token: 33	1016	wmic.exe
Token: 34	1016	wmic.exe
Token: 35	1016	wmic.exe
Token: 36	1016	wmic.exe
Token: SeDebugPrivilege	3328	powershell.exe
Token: SeDebugPrivilege	2796	powershell.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	4484	powershell.exe
Token: SeIncreaseQuotaPrivilege	4604	wmic.exe
Token: SeSecurityPrivilege	4604	wmic.exe
Token: SeTakeOwnershipPrivilege	4604	wmic.exe
Token: SeLoadDriverPrivilege	4604	wmic.exe
Token: SeSystemProfilePrivilege	4604	wmic.exe
Token: SeSystemtimePrivilege	4604	wmic.exe
Token: SeProfSingleProcessPrivilege	4604	wmic.exe
Token: SeIncBasePriorityPrivilege	4604	wmic.exe
Token: SeCreatePagefilePrivilege	4604	wmic.exe
Token: SeBackupPrivilege	4604	wmic.exe
Token: SeRestorePrivilege	4604	wmic.exe
Token: SeShutdownPrivilege	4604	wmic.exe
Token: SeDebugPrivilege	4604	wmic.exe
Token: SeSystemEnvironmentPrivilege	4604	wmic.exe
Token: SeRemoteShutdownPrivilege	4604	wmic.exe
Token: SeUndockPrivilege	4604	wmic.exe
Token: SeManageVolumePrivilege	4604	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3668 wrote to memory of 1016	3668	b5uEJHZB6Rl.exe	84
PID 3668 wrote to memory of 1016	3668	b5uEJHZB6Rl.exe	84
PID 3668 wrote to memory of 1768	3668	b5uEJHZB6Rl.exe	89
PID 3668 wrote to memory of 1768	3668	b5uEJHZB6Rl.exe	89
PID 3668 wrote to memory of 3328	3668	b5uEJHZB6Rl.exe	91
PID 3668 wrote to memory of 3328	3668	b5uEJHZB6Rl.exe	91
PID 3668 wrote to memory of 2796	3668	b5uEJHZB6Rl.exe	93
PID 3668 wrote to memory of 2796	3668	b5uEJHZB6Rl.exe	93
PID 3668 wrote to memory of 2692	3668	b5uEJHZB6Rl.exe	95
PID 3668 wrote to memory of 2692	3668	b5uEJHZB6Rl.exe	95
PID 3668 wrote to memory of 4484	3668	b5uEJHZB6Rl.exe	97
PID 3668 wrote to memory of 4484	3668	b5uEJHZB6Rl.exe	97
PID 3668 wrote to memory of 4604	3668	b5uEJHZB6Rl.exe	102
PID 3668 wrote to memory of 4604	3668	b5uEJHZB6Rl.exe	102
PID 3668 wrote to memory of 456	3668	b5uEJHZB6Rl.exe	104
PID 3668 wrote to memory of 456	3668	b5uEJHZB6Rl.exe	104
PID 3668 wrote to memory of 2952	3668	b5uEJHZB6Rl.exe	106
PID 3668 wrote to memory of 2952	3668	b5uEJHZB6Rl.exe	106
PID 3668 wrote to memory of 4884	3668	b5uEJHZB6Rl.exe	108
PID 3668 wrote to memory of 4884	3668	b5uEJHZB6Rl.exe	108
PID 3668 wrote to memory of 3884	3668	b5uEJHZB6Rl.exe	110
PID 3668 wrote to memory of 3884	3668	b5uEJHZB6Rl.exe	110
PID 3668 wrote to memory of 2036	3668	b5uEJHZB6Rl.exe	112
PID 3668 wrote to memory of 2036	3668	b5uEJHZB6Rl.exe	112
PID 2036 wrote to memory of 2576	2036	cmd.exe	114
PID 2036 wrote to memory of 2576	2036	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1768	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe
"C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3668
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1016
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
  2⤵
  - Views/modifies file attributes
  PID:1768
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3328
- 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:2796
- 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:2692
- 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:4484
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4604
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:456
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2952
- 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:4884
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3884
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2036
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2576

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

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
62623d22bd9e037191765d5083ce16a3

SHA1
4a07da6872672f715a4780513d95ed8ddeefd259

SHA256
95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010

SHA512
9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992

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

Filesize
948B

MD5
1d143d8f176947e4677211d4a25162e0

SHA1
8b595dccdc6dd126d7660cb074968b2e28ce7071

SHA256
5552727ed38222e454bf700c88d5b1d16823e2ffb095ecb0aa8c1d73b897eab8

SHA512
bc4096fd0f70abdf9286f44fa97d8dfb8773506c9358d9967fcade44f4686e647b0c394792bdf1c2df6888e0d20ce2e053a435f543c125629afcc90cbe394497

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
b5e2fd95470c50743ba121fd6bd03a7b

SHA1
75545ed499d9dde51a1fc1cf535eb4f50ec79250

SHA256
d9c961aaf784b9ce81b0a3aac7a39bd41e9f2702d9c28deb20e786d385b88288

SHA512
76bdc793f8b38f603b5ad0957474660bb09e963a2496564b8ceac6591d532fc9498214b81c3908bafc13ff0b07028457c6c997998adfd2203304cb1c82899423

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rjd1foau.3e4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3328-13-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/3328-12-0x000002ACE9620000-0x000002ACE9642000-memory.dmp

Filesize
136KB

Download
memory/3328-14-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/3328-15-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/3328-18-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/3668-34-0x0000019CB76E0000-0x0000019CB7730000-memory.dmp

Filesize
320KB

Download
memory/3668-33-0x0000019CB7660000-0x0000019CB76D6000-memory.dmp

Filesize
472KB

Download
memory/3668-35-0x0000019CB7750000-0x0000019CB776E000-memory.dmp

Filesize
120KB

Download
memory/3668-1-0x0000019C9CF20000-0x0000019C9CF60000-memory.dmp

Filesize
256KB

Download
memory/3668-0-0x00007FFD50683000-0x00007FFD50685000-memory.dmp

Filesize
8KB

Download
memory/3668-72-0x0000019CB75F0000-0x0000019CB75FA000-memory.dmp

Filesize
40KB

Download
memory/3668-73-0x0000019CB7640000-0x0000019CB7652000-memory.dmp

Filesize
72KB

Download
memory/3668-2-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download
memory/3668-93-0x00007FFD50680000-0x00007FFD51141000-memory.dmp

Filesize
10.8MB

Download