umbral | ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

Analysis

max time kernel
119s
max time network
127s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
behavioral1/memory/2748-1-0x0000000000EB0000-0x0000000000EF0000-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
3052	powershell.exe
2464	powershell.exe
1860	powershell.exe
2572	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b5uEJHZB6Rl.exe

Deletes itself 1 IoCs

pid	Process
2440	cmd.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
9	discord.com
10	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
6	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
2440	cmd.exe
2456	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2736	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2456	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2748	b5uEJHZB6Rl.exe
2572	powershell.exe
3052	powershell.exe
2464	powershell.exe
1740	powershell.exe
1860	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	b5uEJHZB6Rl.exe
Token: SeIncreaseQuotaPrivilege	2808	wmic.exe
Token: SeSecurityPrivilege	2808	wmic.exe
Token: SeTakeOwnershipPrivilege	2808	wmic.exe
Token: SeLoadDriverPrivilege	2808	wmic.exe
Token: SeSystemProfilePrivilege	2808	wmic.exe
Token: SeSystemtimePrivilege	2808	wmic.exe
Token: SeProfSingleProcessPrivilege	2808	wmic.exe
Token: SeIncBasePriorityPrivilege	2808	wmic.exe
Token: SeCreatePagefilePrivilege	2808	wmic.exe
Token: SeBackupPrivilege	2808	wmic.exe
Token: SeRestorePrivilege	2808	wmic.exe
Token: SeShutdownPrivilege	2808	wmic.exe
Token: SeDebugPrivilege	2808	wmic.exe
Token: SeSystemEnvironmentPrivilege	2808	wmic.exe
Token: SeRemoteShutdownPrivilege	2808	wmic.exe
Token: SeUndockPrivilege	2808	wmic.exe
Token: SeManageVolumePrivilege	2808	wmic.exe
Token: 33	2808	wmic.exe
Token: 34	2808	wmic.exe
Token: 35	2808	wmic.exe
Token: SeIncreaseQuotaPrivilege	2808	wmic.exe
Token: SeSecurityPrivilege	2808	wmic.exe
Token: SeTakeOwnershipPrivilege	2808	wmic.exe
Token: SeLoadDriverPrivilege	2808	wmic.exe
Token: SeSystemProfilePrivilege	2808	wmic.exe
Token: SeSystemtimePrivilege	2808	wmic.exe
Token: SeProfSingleProcessPrivilege	2808	wmic.exe
Token: SeIncBasePriorityPrivilege	2808	wmic.exe
Token: SeCreatePagefilePrivilege	2808	wmic.exe
Token: SeBackupPrivilege	2808	wmic.exe
Token: SeRestorePrivilege	2808	wmic.exe
Token: SeShutdownPrivilege	2808	wmic.exe
Token: SeDebugPrivilege	2808	wmic.exe
Token: SeSystemEnvironmentPrivilege	2808	wmic.exe
Token: SeRemoteShutdownPrivilege	2808	wmic.exe
Token: SeUndockPrivilege	2808	wmic.exe
Token: SeManageVolumePrivilege	2808	wmic.exe
Token: 33	2808	wmic.exe
Token: 34	2808	wmic.exe
Token: 35	2808	wmic.exe
Token: SeDebugPrivilege	2572	powershell.exe
Token: SeDebugPrivilege	3052	powershell.exe
Token: SeDebugPrivilege	2464	powershell.exe
Token: SeDebugPrivilege	1740	powershell.exe
Token: SeIncreaseQuotaPrivilege	2880	wmic.exe
Token: SeSecurityPrivilege	2880	wmic.exe
Token: SeTakeOwnershipPrivilege	2880	wmic.exe
Token: SeLoadDriverPrivilege	2880	wmic.exe
Token: SeSystemProfilePrivilege	2880	wmic.exe
Token: SeSystemtimePrivilege	2880	wmic.exe
Token: SeProfSingleProcessPrivilege	2880	wmic.exe
Token: SeIncBasePriorityPrivilege	2880	wmic.exe
Token: SeCreatePagefilePrivilege	2880	wmic.exe
Token: SeBackupPrivilege	2880	wmic.exe
Token: SeRestorePrivilege	2880	wmic.exe
Token: SeShutdownPrivilege	2880	wmic.exe
Token: SeDebugPrivilege	2880	wmic.exe
Token: SeSystemEnvironmentPrivilege	2880	wmic.exe
Token: SeRemoteShutdownPrivilege	2880	wmic.exe
Token: SeUndockPrivilege	2880	wmic.exe
Token: SeManageVolumePrivilege	2880	wmic.exe
Token: 33	2880	wmic.exe
Token: 34	2880	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2748 wrote to memory of 2808	2748	b5uEJHZB6Rl.exe	30
PID 2748 wrote to memory of 2808	2748	b5uEJHZB6Rl.exe	30
PID 2748 wrote to memory of 2808	2748	b5uEJHZB6Rl.exe	30
PID 2748 wrote to memory of 2732	2748	b5uEJHZB6Rl.exe	33
PID 2748 wrote to memory of 2732	2748	b5uEJHZB6Rl.exe	33
PID 2748 wrote to memory of 2732	2748	b5uEJHZB6Rl.exe	33
PID 2748 wrote to memory of 2572	2748	b5uEJHZB6Rl.exe	35
PID 2748 wrote to memory of 2572	2748	b5uEJHZB6Rl.exe	35
PID 2748 wrote to memory of 2572	2748	b5uEJHZB6Rl.exe	35
PID 2748 wrote to memory of 3052	2748	b5uEJHZB6Rl.exe	37
PID 2748 wrote to memory of 3052	2748	b5uEJHZB6Rl.exe	37
PID 2748 wrote to memory of 3052	2748	b5uEJHZB6Rl.exe	37
PID 2748 wrote to memory of 2464	2748	b5uEJHZB6Rl.exe	39
PID 2748 wrote to memory of 2464	2748	b5uEJHZB6Rl.exe	39
PID 2748 wrote to memory of 2464	2748	b5uEJHZB6Rl.exe	39
PID 2748 wrote to memory of 1740	2748	b5uEJHZB6Rl.exe	41
PID 2748 wrote to memory of 1740	2748	b5uEJHZB6Rl.exe	41
PID 2748 wrote to memory of 1740	2748	b5uEJHZB6Rl.exe	41
PID 2748 wrote to memory of 2880	2748	b5uEJHZB6Rl.exe	43
PID 2748 wrote to memory of 2880	2748	b5uEJHZB6Rl.exe	43
PID 2748 wrote to memory of 2880	2748	b5uEJHZB6Rl.exe	43
PID 2748 wrote to memory of 3028	2748	b5uEJHZB6Rl.exe	45
PID 2748 wrote to memory of 3028	2748	b5uEJHZB6Rl.exe	45
PID 2748 wrote to memory of 3028	2748	b5uEJHZB6Rl.exe	45
PID 2748 wrote to memory of 1868	2748	b5uEJHZB6Rl.exe	47
PID 2748 wrote to memory of 1868	2748	b5uEJHZB6Rl.exe	47
PID 2748 wrote to memory of 1868	2748	b5uEJHZB6Rl.exe	47
PID 2748 wrote to memory of 1860	2748	b5uEJHZB6Rl.exe	49
PID 2748 wrote to memory of 1860	2748	b5uEJHZB6Rl.exe	49
PID 2748 wrote to memory of 1860	2748	b5uEJHZB6Rl.exe	49
PID 2748 wrote to memory of 2736	2748	b5uEJHZB6Rl.exe	51
PID 2748 wrote to memory of 2736	2748	b5uEJHZB6Rl.exe	51
PID 2748 wrote to memory of 2736	2748	b5uEJHZB6Rl.exe	51
PID 2748 wrote to memory of 2440	2748	b5uEJHZB6Rl.exe	53
PID 2748 wrote to memory of 2440	2748	b5uEJHZB6Rl.exe	53
PID 2748 wrote to memory of 2440	2748	b5uEJHZB6Rl.exe	53
PID 2440 wrote to memory of 2456	2440	cmd.exe	55
PID 2440 wrote to memory of 2456	2440	cmd.exe	55
PID 2440 wrote to memory of 2456	2440	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2732	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:2748
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2808
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
  2⤵
  - Views/modifies file attributes
  PID:2732
- 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:2572
- 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:3052
- 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:2464
- 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:1740
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2880
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3028
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1868
- 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:1860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2736
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2440
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2456

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
f105c0c80d3b4e310a6e486775924b24

SHA1
715ca5c7eabbd498d08fd4f6cd28e77c4c7944b7

SHA256
64d8e04c30ee64cdc930e461b50a5dfe5c2b4f13aa576e96a085931b356d6da4

SHA512
3fe3b398eb4312ca07acc5d53268f120950faacd2f6f0a58386cc5891c8590ebb0490f4be6b7d719681371b67757bbf9ca71036ae2bafed40700c0394ad99fd0

Download Submit
memory/1860-43-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2572-7-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

Filesize
2.9MB

Download
memory/2572-8-0x00000000022C0000-0x00000000022C8000-memory.dmp

Filesize
32KB

Download
memory/2748-0-0x000007FEF6033000-0x000007FEF6034000-memory.dmp

Filesize
4KB

Download
memory/2748-1-0x0000000000EB0000-0x0000000000EF0000-memory.dmp

Filesize
256KB

Download
memory/2748-2-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2748-44-0x000007FEF6033000-0x000007FEF6034000-memory.dmp

Filesize
4KB

Download
memory/2748-48-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/3052-14-0x000000001B6F0000-0x000000001B9D2000-memory.dmp

Filesize
2.9MB

Download
memory/3052-15-0x0000000001DA0000-0x0000000001DA8000-memory.dmp

Filesize
32KB

Download