umbral | ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

Analysis

max time kernel
79s
max time network
81s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
05-08-2024 16:21

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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 credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2520-1-0x0000000000E10000-0x0000000000E50000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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
2640	powershell.exe
2644	powershell.exe
1156	powershell.exe
1816	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
480	cmd.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
10	discord.com
9	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
480	cmd.exe
844	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2140	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
844	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2520	b5uEJHZB6Rl.exe
2640	powershell.exe
2644	powershell.exe
1156	powershell.exe
2380	powershell.exe
1816	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	b5uEJHZB6Rl.exe
Token: SeIncreaseQuotaPrivilege	2824	wmic.exe
Token: SeSecurityPrivilege	2824	wmic.exe
Token: SeTakeOwnershipPrivilege	2824	wmic.exe
Token: SeLoadDriverPrivilege	2824	wmic.exe
Token: SeSystemProfilePrivilege	2824	wmic.exe
Token: SeSystemtimePrivilege	2824	wmic.exe
Token: SeProfSingleProcessPrivilege	2824	wmic.exe
Token: SeIncBasePriorityPrivilege	2824	wmic.exe
Token: SeCreatePagefilePrivilege	2824	wmic.exe
Token: SeBackupPrivilege	2824	wmic.exe
Token: SeRestorePrivilege	2824	wmic.exe
Token: SeShutdownPrivilege	2824	wmic.exe
Token: SeDebugPrivilege	2824	wmic.exe
Token: SeSystemEnvironmentPrivilege	2824	wmic.exe
Token: SeRemoteShutdownPrivilege	2824	wmic.exe
Token: SeUndockPrivilege	2824	wmic.exe
Token: SeManageVolumePrivilege	2824	wmic.exe
Token: 33	2824	wmic.exe
Token: 34	2824	wmic.exe
Token: 35	2824	wmic.exe
Token: SeIncreaseQuotaPrivilege	2824	wmic.exe
Token: SeSecurityPrivilege	2824	wmic.exe
Token: SeTakeOwnershipPrivilege	2824	wmic.exe
Token: SeLoadDriverPrivilege	2824	wmic.exe
Token: SeSystemProfilePrivilege	2824	wmic.exe
Token: SeSystemtimePrivilege	2824	wmic.exe
Token: SeProfSingleProcessPrivilege	2824	wmic.exe
Token: SeIncBasePriorityPrivilege	2824	wmic.exe
Token: SeCreatePagefilePrivilege	2824	wmic.exe
Token: SeBackupPrivilege	2824	wmic.exe
Token: SeRestorePrivilege	2824	wmic.exe
Token: SeShutdownPrivilege	2824	wmic.exe
Token: SeDebugPrivilege	2824	wmic.exe
Token: SeSystemEnvironmentPrivilege	2824	wmic.exe
Token: SeRemoteShutdownPrivilege	2824	wmic.exe
Token: SeUndockPrivilege	2824	wmic.exe
Token: SeManageVolumePrivilege	2824	wmic.exe
Token: 33	2824	wmic.exe
Token: 34	2824	wmic.exe
Token: 35	2824	wmic.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	1156	powershell.exe
Token: SeDebugPrivilege	2380	powershell.exe
Token: SeIncreaseQuotaPrivilege	2780	wmic.exe
Token: SeSecurityPrivilege	2780	wmic.exe
Token: SeTakeOwnershipPrivilege	2780	wmic.exe
Token: SeLoadDriverPrivilege	2780	wmic.exe
Token: SeSystemProfilePrivilege	2780	wmic.exe
Token: SeSystemtimePrivilege	2780	wmic.exe
Token: SeProfSingleProcessPrivilege	2780	wmic.exe
Token: SeIncBasePriorityPrivilege	2780	wmic.exe
Token: SeCreatePagefilePrivilege	2780	wmic.exe
Token: SeBackupPrivilege	2780	wmic.exe
Token: SeRestorePrivilege	2780	wmic.exe
Token: SeShutdownPrivilege	2780	wmic.exe
Token: SeDebugPrivilege	2780	wmic.exe
Token: SeSystemEnvironmentPrivilege	2780	wmic.exe
Token: SeRemoteShutdownPrivilege	2780	wmic.exe
Token: SeUndockPrivilege	2780	wmic.exe
Token: SeManageVolumePrivilege	2780	wmic.exe
Token: 33	2780	wmic.exe
Token: 34	2780	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2824	2520	b5uEJHZB6Rl.exe	30
PID 2520 wrote to memory of 2824	2520	b5uEJHZB6Rl.exe	30
PID 2520 wrote to memory of 2824	2520	b5uEJHZB6Rl.exe	30
PID 2520 wrote to memory of 2960	2520	b5uEJHZB6Rl.exe	33
PID 2520 wrote to memory of 2960	2520	b5uEJHZB6Rl.exe	33
PID 2520 wrote to memory of 2960	2520	b5uEJHZB6Rl.exe	33
PID 2520 wrote to memory of 2640	2520	b5uEJHZB6Rl.exe	35
PID 2520 wrote to memory of 2640	2520	b5uEJHZB6Rl.exe	35
PID 2520 wrote to memory of 2640	2520	b5uEJHZB6Rl.exe	35
PID 2520 wrote to memory of 2644	2520	b5uEJHZB6Rl.exe	37
PID 2520 wrote to memory of 2644	2520	b5uEJHZB6Rl.exe	37
PID 2520 wrote to memory of 2644	2520	b5uEJHZB6Rl.exe	37
PID 2520 wrote to memory of 1156	2520	b5uEJHZB6Rl.exe	39
PID 2520 wrote to memory of 1156	2520	b5uEJHZB6Rl.exe	39
PID 2520 wrote to memory of 1156	2520	b5uEJHZB6Rl.exe	39
PID 2520 wrote to memory of 2380	2520	b5uEJHZB6Rl.exe	41
PID 2520 wrote to memory of 2380	2520	b5uEJHZB6Rl.exe	41
PID 2520 wrote to memory of 2380	2520	b5uEJHZB6Rl.exe	41
PID 2520 wrote to memory of 2780	2520	b5uEJHZB6Rl.exe	43
PID 2520 wrote to memory of 2780	2520	b5uEJHZB6Rl.exe	43
PID 2520 wrote to memory of 2780	2520	b5uEJHZB6Rl.exe	43
PID 2520 wrote to memory of 1612	2520	b5uEJHZB6Rl.exe	45
PID 2520 wrote to memory of 1612	2520	b5uEJHZB6Rl.exe	45
PID 2520 wrote to memory of 1612	2520	b5uEJHZB6Rl.exe	45
PID 2520 wrote to memory of 2064	2520	b5uEJHZB6Rl.exe	47
PID 2520 wrote to memory of 2064	2520	b5uEJHZB6Rl.exe	47
PID 2520 wrote to memory of 2064	2520	b5uEJHZB6Rl.exe	47
PID 2520 wrote to memory of 1816	2520	b5uEJHZB6Rl.exe	49
PID 2520 wrote to memory of 1816	2520	b5uEJHZB6Rl.exe	49
PID 2520 wrote to memory of 1816	2520	b5uEJHZB6Rl.exe	49
PID 2520 wrote to memory of 2140	2520	b5uEJHZB6Rl.exe	51
PID 2520 wrote to memory of 2140	2520	b5uEJHZB6Rl.exe	51
PID 2520 wrote to memory of 2140	2520	b5uEJHZB6Rl.exe	51
PID 2520 wrote to memory of 480	2520	b5uEJHZB6Rl.exe	53
PID 2520 wrote to memory of 480	2520	b5uEJHZB6Rl.exe	53
PID 2520 wrote to memory of 480	2520	b5uEJHZB6Rl.exe	53
PID 480 wrote to memory of 844	480	cmd.exe	55
PID 480 wrote to memory of 844	480	cmd.exe	55
PID 480 wrote to memory of 844	480	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2960	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:2520
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2824
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
  2⤵
  - Views/modifies file attributes
  PID:2960
- 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:2640
- 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:2644
- 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:1156
- 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:2380
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2780
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1612
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2064
- 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:1816
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2140
- 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:480
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:844

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
cd5313d8e45bb65e904b0022276c52cb

SHA1
9edf1b1b68602bec9663a97e581a25962f01d927

SHA256
374ba85ce0e469f4c542cbfac77ec71bef72a5fcd846b479c28752162efb9a05

SHA512
8eb2a492eb9a4aac0447deb7e2559560b9bc5e9ef4228d025781a4ab100d13cf6d729e82002b7306f0eda838c6c4c9fd37ea9dc62a66cd218a51d288f8c4d671

Download Submit
memory/1816-47-0x0000000002620000-0x0000000002628000-memory.dmp

Filesize
32KB

Download
memory/1816-46-0x000000001B1B0000-0x000000001B492000-memory.dmp

Filesize
2.9MB

Download
memory/2520-1-0x0000000000E10000-0x0000000000E50000-memory.dmp

Filesize
256KB

Download
memory/2520-2-0x000007FEF5DB0000-0x000007FEF679C000-memory.dmp

Filesize
9.9MB

Download
memory/2520-3-0x000007FEF5DB3000-0x000007FEF5DB4000-memory.dmp

Filesize
4KB

Download
memory/2520-4-0x000007FEF5DB0000-0x000007FEF679C000-memory.dmp

Filesize
9.9MB

Download
memory/2520-51-0x000007FEF5DB0000-0x000007FEF679C000-memory.dmp

Filesize
9.9MB

Download
memory/2520-0-0x000007FEF5DB3000-0x000007FEF5DB4000-memory.dmp

Filesize
4KB

Download
memory/2640-10-0x00000000022F0000-0x00000000022F8000-memory.dmp

Filesize
32KB

Download
memory/2640-9-0x000000001B2A0000-0x000000001B582000-memory.dmp

Filesize
2.9MB

Download
memory/2644-17-0x0000000002520000-0x0000000002528000-memory.dmp

Filesize
32KB

Download
memory/2644-16-0x000000001B1E0000-0x000000001B4C2000-memory.dmp

Filesize
2.9MB

Download