umbral | ffa57fe774834afa8dc2d696c2152c745e6da81fc2de0f46f3b72f4f34193931

Analysis

max time kernel
94s
max time network
74s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
08-12-2024 02:03

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General

Target

anx tools.exe
Size

231KB
MD5

f38061c227c9dc21395a4e9c874003c9
SHA1

966890144df8f62eb3dd62012fda0ce93176cd3a
SHA256

ffa57fe774834afa8dc2d696c2152c745e6da81fc2de0f46f3b72f4f34193931
SHA512

95e30bc74a83363c7d6c5a8634d68f76283a43ad9c50b62fc65bf8e9061868dc2050889e47768756d204274b84f56f7dcf75db9c8c72cd863facc8f5090bcee5
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD4a9UfNbYMTVqL9Y0hr0b8e1m2i:DoZtL+EP8a9UfNbYMTVqL9Y0hYg

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/376-1-0x0000000001270000-0x00000000012B0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Umbral family
umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2384	powershell.exe
1676	powershell.exe
3040	powershell.exe
2960	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
1600	cmd.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
10	discord.com
11	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
7	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
1600	cmd.exe
1800	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1408	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1800	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
376	anx tools.exe
2960	powershell.exe
2384	powershell.exe
1676	powershell.exe
2472	powershell.exe
3040	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	376	anx tools.exe
Token: SeIncreaseQuotaPrivilege	2720	wmic.exe
Token: SeSecurityPrivilege	2720	wmic.exe
Token: SeTakeOwnershipPrivilege	2720	wmic.exe
Token: SeLoadDriverPrivilege	2720	wmic.exe
Token: SeSystemProfilePrivilege	2720	wmic.exe
Token: SeSystemtimePrivilege	2720	wmic.exe
Token: SeProfSingleProcessPrivilege	2720	wmic.exe
Token: SeIncBasePriorityPrivilege	2720	wmic.exe
Token: SeCreatePagefilePrivilege	2720	wmic.exe
Token: SeBackupPrivilege	2720	wmic.exe
Token: SeRestorePrivilege	2720	wmic.exe
Token: SeShutdownPrivilege	2720	wmic.exe
Token: SeDebugPrivilege	2720	wmic.exe
Token: SeSystemEnvironmentPrivilege	2720	wmic.exe
Token: SeRemoteShutdownPrivilege	2720	wmic.exe
Token: SeUndockPrivilege	2720	wmic.exe
Token: SeManageVolumePrivilege	2720	wmic.exe
Token: 33	2720	wmic.exe
Token: 34	2720	wmic.exe
Token: 35	2720	wmic.exe
Token: SeIncreaseQuotaPrivilege	2720	wmic.exe
Token: SeSecurityPrivilege	2720	wmic.exe
Token: SeTakeOwnershipPrivilege	2720	wmic.exe
Token: SeLoadDriverPrivilege	2720	wmic.exe
Token: SeSystemProfilePrivilege	2720	wmic.exe
Token: SeSystemtimePrivilege	2720	wmic.exe
Token: SeProfSingleProcessPrivilege	2720	wmic.exe
Token: SeIncBasePriorityPrivilege	2720	wmic.exe
Token: SeCreatePagefilePrivilege	2720	wmic.exe
Token: SeBackupPrivilege	2720	wmic.exe
Token: SeRestorePrivilege	2720	wmic.exe
Token: SeShutdownPrivilege	2720	wmic.exe
Token: SeDebugPrivilege	2720	wmic.exe
Token: SeSystemEnvironmentPrivilege	2720	wmic.exe
Token: SeRemoteShutdownPrivilege	2720	wmic.exe
Token: SeUndockPrivilege	2720	wmic.exe
Token: SeManageVolumePrivilege	2720	wmic.exe
Token: 33	2720	wmic.exe
Token: 34	2720	wmic.exe
Token: 35	2720	wmic.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeDebugPrivilege	2384	powershell.exe
Token: SeDebugPrivilege	1676	powershell.exe
Token: SeDebugPrivilege	2472	powershell.exe
Token: SeIncreaseQuotaPrivilege	2468	wmic.exe
Token: SeSecurityPrivilege	2468	wmic.exe
Token: SeTakeOwnershipPrivilege	2468	wmic.exe
Token: SeLoadDriverPrivilege	2468	wmic.exe
Token: SeSystemProfilePrivilege	2468	wmic.exe
Token: SeSystemtimePrivilege	2468	wmic.exe
Token: SeProfSingleProcessPrivilege	2468	wmic.exe
Token: SeIncBasePriorityPrivilege	2468	wmic.exe
Token: SeCreatePagefilePrivilege	2468	wmic.exe
Token: SeBackupPrivilege	2468	wmic.exe
Token: SeRestorePrivilege	2468	wmic.exe
Token: SeShutdownPrivilege	2468	wmic.exe
Token: SeDebugPrivilege	2468	wmic.exe
Token: SeSystemEnvironmentPrivilege	2468	wmic.exe
Token: SeRemoteShutdownPrivilege	2468	wmic.exe
Token: SeUndockPrivilege	2468	wmic.exe
Token: SeManageVolumePrivilege	2468	wmic.exe
Token: 33	2468	wmic.exe
Token: 34	2468	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 376 wrote to memory of 2720	376	anx tools.exe	30
PID 376 wrote to memory of 2720	376	anx tools.exe	30
PID 376 wrote to memory of 2720	376	anx tools.exe	30
PID 376 wrote to memory of 2732	376	anx tools.exe	33
PID 376 wrote to memory of 2732	376	anx tools.exe	33
PID 376 wrote to memory of 2732	376	anx tools.exe	33
PID 376 wrote to memory of 2960	376	anx tools.exe	35
PID 376 wrote to memory of 2960	376	anx tools.exe	35
PID 376 wrote to memory of 2960	376	anx tools.exe	35
PID 376 wrote to memory of 2384	376	anx tools.exe	37
PID 376 wrote to memory of 2384	376	anx tools.exe	37
PID 376 wrote to memory of 2384	376	anx tools.exe	37
PID 376 wrote to memory of 1676	376	anx tools.exe	39
PID 376 wrote to memory of 1676	376	anx tools.exe	39
PID 376 wrote to memory of 1676	376	anx tools.exe	39
PID 376 wrote to memory of 2472	376	anx tools.exe	41
PID 376 wrote to memory of 2472	376	anx tools.exe	41
PID 376 wrote to memory of 2472	376	anx tools.exe	41
PID 376 wrote to memory of 2468	376	anx tools.exe	43
PID 376 wrote to memory of 2468	376	anx tools.exe	43
PID 376 wrote to memory of 2468	376	anx tools.exe	43
PID 376 wrote to memory of 1420	376	anx tools.exe	45
PID 376 wrote to memory of 1420	376	anx tools.exe	45
PID 376 wrote to memory of 1420	376	anx tools.exe	45
PID 376 wrote to memory of 1916	376	anx tools.exe	47
PID 376 wrote to memory of 1916	376	anx tools.exe	47
PID 376 wrote to memory of 1916	376	anx tools.exe	47
PID 376 wrote to memory of 3040	376	anx tools.exe	49
PID 376 wrote to memory of 3040	376	anx tools.exe	49
PID 376 wrote to memory of 3040	376	anx tools.exe	49
PID 376 wrote to memory of 1408	376	anx tools.exe	51
PID 376 wrote to memory of 1408	376	anx tools.exe	51
PID 376 wrote to memory of 1408	376	anx tools.exe	51
PID 376 wrote to memory of 1600	376	anx tools.exe	53
PID 376 wrote to memory of 1600	376	anx tools.exe	53
PID 376 wrote to memory of 1600	376	anx tools.exe	53
PID 1600 wrote to memory of 1800	1600	cmd.exe	55
PID 1600 wrote to memory of 1800	1600	cmd.exe	55
PID 1600 wrote to memory of 1800	1600	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2732	attrib.exe

C:\Users\Admin\AppData\Local\Temp\anx tools.exe
"C:\Users\Admin\AppData\Local\Temp\anx tools.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:376
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2720
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\anx tools.exe"
  2⤵
  - Views/modifies file attributes
  PID:2732
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\anx tools.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2960
- 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:2384
- 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:1676
- 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:2472
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2468
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1420
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1916
- 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:3040
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1408
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\anx tools.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1600
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1800

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
f2d539756b9409315ec3d81b097af7c5

SHA1
ae9f780811e09c77c1dbce1d6cafa685e48cdce0

SHA256
e897c9968d18b5579e43e422ee88092d4a70dbfbfd2c208cab6ea1b7efa5677d

SHA512
d282315cf6b47cd88b622b26383296044fab0ad37c0a92f4bb1defc4ef2b07f92724a503bd8833016e7c45a9d243e64257c7a7d87f4aa76489acbcdd5157777c

Download Submit
memory/376-0-0x000007FEF5F73000-0x000007FEF5F74000-memory.dmp

Filesize
4KB

Download
memory/376-1-0x0000000001270000-0x00000000012B0000-memory.dmp

Filesize
256KB

Download
memory/376-2-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/376-3-0x000007FEF5F73000-0x000007FEF5F74000-memory.dmp

Filesize
4KB

Download
memory/376-4-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/376-50-0x000007FEF5F70000-0x000007FEF695C000-memory.dmp

Filesize
9.9MB

Download
memory/2384-17-0x0000000001EF0000-0x0000000001EF8000-memory.dmp

Filesize
32KB

Download
memory/2384-16-0x000000001B780000-0x000000001BA62000-memory.dmp

Filesize
2.9MB

Download
memory/2960-10-0x0000000001DB0000-0x0000000001DB8000-memory.dmp

Filesize
32KB

Download
memory/2960-9-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/3040-45-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/3040-46-0x0000000001EC0000-0x0000000001EC8000-memory.dmp

Filesize
32KB

Download