umbral | 15e11de5fdc18d4d1a9fe45e494887fe04087aae5a215c1bff4f8fa36b86e7fb

Analysis

max time kernel
9s
max time network
16s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
26-07-2024 20:32

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General

Target

SilverBullet+1.1.3.exe
Size

246KB
MD5

cbcd362933c6c8a10a0a6d8c40bbb66a
SHA1

4fc0ff8ec329b58c4220a577f694b96be0b874f8
SHA256

15e11de5fdc18d4d1a9fe45e494887fe04087aae5a215c1bff4f8fa36b86e7fb
SHA512

da01c53ac833edbbb5abbefa5a5da4de0cdd10c9c7469b58db6f14470bbfa6b19c2b335759045402807c549a2fc36495d5d0a4b0ce41cb12a203e2e3d0b1b617
SSDEEP

6144:JloZM+rIkd8g+EtXHkv/iD4z6F+cCFdWcj+ctBIKzb8e1ma5i:7oZtL+EP8z6F+cCFdWcj+ctBIMFg

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2424-1-0x000001A4D4610000-0x000001A4D4654000-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
1776	powershell.exe
3500	powershell.exe
1568	powershell.exe
2888	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	SilverBullet+1.1.3.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
33	discord.com
35	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
9	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
4876	cmd.exe
4732	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3824	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4732	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2424	SilverBullet+1.1.3.exe
1776	powershell.exe
1776	powershell.exe
3500	powershell.exe
3500	powershell.exe
1568	powershell.exe
1568	powershell.exe
3708	powershell.exe
3708	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2424	SilverBullet+1.1.3.exe
Token: SeIncreaseQuotaPrivilege	2052	wmic.exe
Token: SeSecurityPrivilege	2052	wmic.exe
Token: SeTakeOwnershipPrivilege	2052	wmic.exe
Token: SeLoadDriverPrivilege	2052	wmic.exe
Token: SeSystemProfilePrivilege	2052	wmic.exe
Token: SeSystemtimePrivilege	2052	wmic.exe
Token: SeProfSingleProcessPrivilege	2052	wmic.exe
Token: SeIncBasePriorityPrivilege	2052	wmic.exe
Token: SeCreatePagefilePrivilege	2052	wmic.exe
Token: SeBackupPrivilege	2052	wmic.exe
Token: SeRestorePrivilege	2052	wmic.exe
Token: SeShutdownPrivilege	2052	wmic.exe
Token: SeDebugPrivilege	2052	wmic.exe
Token: SeSystemEnvironmentPrivilege	2052	wmic.exe
Token: SeRemoteShutdownPrivilege	2052	wmic.exe
Token: SeUndockPrivilege	2052	wmic.exe
Token: SeManageVolumePrivilege	2052	wmic.exe
Token: 33	2052	wmic.exe
Token: 34	2052	wmic.exe
Token: 35	2052	wmic.exe
Token: 36	2052	wmic.exe
Token: SeIncreaseQuotaPrivilege	2052	wmic.exe
Token: SeSecurityPrivilege	2052	wmic.exe
Token: SeTakeOwnershipPrivilege	2052	wmic.exe
Token: SeLoadDriverPrivilege	2052	wmic.exe
Token: SeSystemProfilePrivilege	2052	wmic.exe
Token: SeSystemtimePrivilege	2052	wmic.exe
Token: SeProfSingleProcessPrivilege	2052	wmic.exe
Token: SeIncBasePriorityPrivilege	2052	wmic.exe
Token: SeCreatePagefilePrivilege	2052	wmic.exe
Token: SeBackupPrivilege	2052	wmic.exe
Token: SeRestorePrivilege	2052	wmic.exe
Token: SeShutdownPrivilege	2052	wmic.exe
Token: SeDebugPrivilege	2052	wmic.exe
Token: SeSystemEnvironmentPrivilege	2052	wmic.exe
Token: SeRemoteShutdownPrivilege	2052	wmic.exe
Token: SeUndockPrivilege	2052	wmic.exe
Token: SeManageVolumePrivilege	2052	wmic.exe
Token: 33	2052	wmic.exe
Token: 34	2052	wmic.exe
Token: 35	2052	wmic.exe
Token: 36	2052	wmic.exe
Token: SeDebugPrivilege	1776	powershell.exe
Token: SeDebugPrivilege	3500	powershell.exe
Token: SeDebugPrivilege	1568	powershell.exe
Token: SeDebugPrivilege	3708	powershell.exe
Token: SeIncreaseQuotaPrivilege	2236	wmic.exe
Token: SeSecurityPrivilege	2236	wmic.exe
Token: SeTakeOwnershipPrivilege	2236	wmic.exe
Token: SeLoadDriverPrivilege	2236	wmic.exe
Token: SeSystemProfilePrivilege	2236	wmic.exe
Token: SeSystemtimePrivilege	2236	wmic.exe
Token: SeProfSingleProcessPrivilege	2236	wmic.exe
Token: SeIncBasePriorityPrivilege	2236	wmic.exe
Token: SeCreatePagefilePrivilege	2236	wmic.exe
Token: SeBackupPrivilege	2236	wmic.exe
Token: SeRestorePrivilege	2236	wmic.exe
Token: SeShutdownPrivilege	2236	wmic.exe
Token: SeDebugPrivilege	2236	wmic.exe
Token: SeSystemEnvironmentPrivilege	2236	wmic.exe
Token: SeRemoteShutdownPrivilege	2236	wmic.exe
Token: SeUndockPrivilege	2236	wmic.exe
Token: SeManageVolumePrivilege	2236	wmic.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2424 wrote to memory of 2052	2424	SilverBullet+1.1.3.exe	85
PID 2424 wrote to memory of 2052	2424	SilverBullet+1.1.3.exe	85
PID 2424 wrote to memory of 3164	2424	SilverBullet+1.1.3.exe	90
PID 2424 wrote to memory of 3164	2424	SilverBullet+1.1.3.exe	90
PID 2424 wrote to memory of 1776	2424	SilverBullet+1.1.3.exe	92
PID 2424 wrote to memory of 1776	2424	SilverBullet+1.1.3.exe	92
PID 2424 wrote to memory of 3500	2424	SilverBullet+1.1.3.exe	95
PID 2424 wrote to memory of 3500	2424	SilverBullet+1.1.3.exe	95
PID 2424 wrote to memory of 1568	2424	SilverBullet+1.1.3.exe	99
PID 2424 wrote to memory of 1568	2424	SilverBullet+1.1.3.exe	99
PID 2424 wrote to memory of 3708	2424	SilverBullet+1.1.3.exe	101
PID 2424 wrote to memory of 3708	2424	SilverBullet+1.1.3.exe	101
PID 2424 wrote to memory of 2236	2424	SilverBullet+1.1.3.exe	104
PID 2424 wrote to memory of 2236	2424	SilverBullet+1.1.3.exe	104
PID 2424 wrote to memory of 1296	2424	SilverBullet+1.1.3.exe	106
PID 2424 wrote to memory of 1296	2424	SilverBullet+1.1.3.exe	106

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3164	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverBullet+1.1.3.exe
"C:\Users\Admin\AppData\Local\Temp\SilverBullet+1.1.3.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2424
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2052
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\SilverBullet+1.1.3.exe"
  2⤵
  - Views/modifies file attributes
  PID:3164
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SilverBullet+1.1.3.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1776
- 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:3500
- 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:1568
- 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:3708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2236
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1296
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2928
- 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
  PID:2888
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3824
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\SilverBullet+1.1.3.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  PID:4876
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4732

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\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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
28ef595a6cc9f47b8eccb22d4ed50d6c

SHA1
4335de707324b15eba79017938c3da2752d3eea5

SHA256
3abd14d4fe7b5697b2fa84993e7183f4fd2580be5b4e5150da15ddda5a9560b9

SHA512
687b7849faa62a4dabc240b573afa163f0cda9a80be61cebe28ef1461777744d73b465ac92d065093228068540846e79c899445057f5b906f9b9fa9868132208

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

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
1KB

MD5
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w4xomnsa.miu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1776-12-0x00007FFF11ED0000-0x00007FFF12991000-memory.dmp

Filesize
10.8MB

Download
memory/1776-14-0x0000016B6A540000-0x0000016B6A562000-memory.dmp

Filesize
136KB

Download
memory/1776-15-0x00007FFF11ED0000-0x00007FFF12991000-memory.dmp

Filesize
10.8MB

Download
memory/1776-18-0x00007FFF11ED0000-0x00007FFF12991000-memory.dmp

Filesize
10.8MB

Download
memory/1776-3-0x00007FFF11ED0000-0x00007FFF12991000-memory.dmp

Filesize
10.8MB

Download
memory/2424-34-0x000001A4EEBF0000-0x000001A4EEC40000-memory.dmp

Filesize
320KB

Download
memory/2424-33-0x000001A4EED50000-0x000001A4EEDC6000-memory.dmp

Filesize
472KB

Download
memory/2424-35-0x000001A4EEDF0000-0x000001A4EEE0E000-memory.dmp

Filesize
120KB

Download
memory/2424-1-0x000001A4D4610000-0x000001A4D4654000-memory.dmp

Filesize
272KB

Download
memory/2424-0-0x00007FFF11ED3000-0x00007FFF11ED5000-memory.dmp

Filesize
8KB

Download
memory/2424-71-0x000001A4EEDD0000-0x000001A4EEDDA000-memory.dmp

Filesize
40KB

Download
memory/2424-72-0x000001A4EEF30000-0x000001A4EEF42000-memory.dmp

Filesize
72KB

Download
memory/2424-2-0x00007FFF11ED0000-0x00007FFF12991000-memory.dmp

Filesize
10.8MB

Download
memory/2424-90-0x00007FFF11ED0000-0x00007FFF12991000-memory.dmp

Filesize
10.8MB

Download