umbral | 0697ab58f1b4c94620982f20ffc2e1069974a7f4c38c804e3a15a3d3f54a89d5

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
30-06-2024 09:08

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General

Target

dllmain.exe
Size

229KB
MD5

411156b1cc6ca8a2722edb9a9bf15991
SHA1

93441490e31783317bb8b3c2e4a9d0916eb4674d
SHA256

0697ab58f1b4c94620982f20ffc2e1069974a7f4c38c804e3a15a3d3f54a89d5
SHA512

61609bbcf4b09a5feb0ba72b531687f73bb3ee1e12dd7bda6ab2a4b5caf33f39e91df7f200184b63039cd7eee2b6b95575a89f5f03850d4841861ca3f4e377b5
SSDEEP

6144:tloZMNrIkd8g+EtXHkv/iD4vW2mmkrHMl9YW3X241b8e1mik4i:voZmL+EP8vW2mmkrHMl9YW3X2MXkB

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2252-1-0x00000000013D0000-0x0000000001410000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2688	powershell.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
8	discord.com
9	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1132	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2688	powershell.exe
2752	powershell.exe
2476	powershell.exe
1964	powershell.exe
540	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2252	dllmain.exe
Token: SeDebugPrivilege	2688	powershell.exe
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	2476	powershell.exe
Token: SeDebugPrivilege	1964	powershell.exe
Token: SeIncreaseQuotaPrivilege	1892	wmic.exe
Token: SeSecurityPrivilege	1892	wmic.exe
Token: SeTakeOwnershipPrivilege	1892	wmic.exe
Token: SeLoadDriverPrivilege	1892	wmic.exe
Token: SeSystemProfilePrivilege	1892	wmic.exe
Token: SeSystemtimePrivilege	1892	wmic.exe
Token: SeProfSingleProcessPrivilege	1892	wmic.exe
Token: SeIncBasePriorityPrivilege	1892	wmic.exe
Token: SeCreatePagefilePrivilege	1892	wmic.exe
Token: SeBackupPrivilege	1892	wmic.exe
Token: SeRestorePrivilege	1892	wmic.exe
Token: SeShutdownPrivilege	1892	wmic.exe
Token: SeDebugPrivilege	1892	wmic.exe
Token: SeSystemEnvironmentPrivilege	1892	wmic.exe
Token: SeRemoteShutdownPrivilege	1892	wmic.exe
Token: SeUndockPrivilege	1892	wmic.exe
Token: SeManageVolumePrivilege	1892	wmic.exe
Token: 33	1892	wmic.exe
Token: 34	1892	wmic.exe
Token: 35	1892	wmic.exe
Token: SeIncreaseQuotaPrivilege	1892	wmic.exe
Token: SeSecurityPrivilege	1892	wmic.exe
Token: SeTakeOwnershipPrivilege	1892	wmic.exe
Token: SeLoadDriverPrivilege	1892	wmic.exe
Token: SeSystemProfilePrivilege	1892	wmic.exe
Token: SeSystemtimePrivilege	1892	wmic.exe
Token: SeProfSingleProcessPrivilege	1892	wmic.exe
Token: SeIncBasePriorityPrivilege	1892	wmic.exe
Token: SeCreatePagefilePrivilege	1892	wmic.exe
Token: SeBackupPrivilege	1892	wmic.exe
Token: SeRestorePrivilege	1892	wmic.exe
Token: SeShutdownPrivilege	1892	wmic.exe
Token: SeDebugPrivilege	1892	wmic.exe
Token: SeSystemEnvironmentPrivilege	1892	wmic.exe
Token: SeRemoteShutdownPrivilege	1892	wmic.exe
Token: SeUndockPrivilege	1892	wmic.exe
Token: SeManageVolumePrivilege	1892	wmic.exe
Token: 33	1892	wmic.exe
Token: 34	1892	wmic.exe
Token: 35	1892	wmic.exe
Token: SeIncreaseQuotaPrivilege	1744	wmic.exe
Token: SeSecurityPrivilege	1744	wmic.exe
Token: SeTakeOwnershipPrivilege	1744	wmic.exe
Token: SeLoadDriverPrivilege	1744	wmic.exe
Token: SeSystemProfilePrivilege	1744	wmic.exe
Token: SeSystemtimePrivilege	1744	wmic.exe
Token: SeProfSingleProcessPrivilege	1744	wmic.exe
Token: SeIncBasePriorityPrivilege	1744	wmic.exe
Token: SeCreatePagefilePrivilege	1744	wmic.exe
Token: SeBackupPrivilege	1744	wmic.exe
Token: SeRestorePrivilege	1744	wmic.exe
Token: SeShutdownPrivilege	1744	wmic.exe
Token: SeDebugPrivilege	1744	wmic.exe
Token: SeSystemEnvironmentPrivilege	1744	wmic.exe
Token: SeRemoteShutdownPrivilege	1744	wmic.exe
Token: SeUndockPrivilege	1744	wmic.exe
Token: SeManageVolumePrivilege	1744	wmic.exe
Token: 33	1744	wmic.exe
Token: 34	1744	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2252 wrote to memory of 2688	2252	dllmain.exe	28
PID 2252 wrote to memory of 2688	2252	dllmain.exe	28
PID 2252 wrote to memory of 2688	2252	dllmain.exe	28
PID 2252 wrote to memory of 2752	2252	dllmain.exe	30
PID 2252 wrote to memory of 2752	2252	dllmain.exe	30
PID 2252 wrote to memory of 2752	2252	dllmain.exe	30
PID 2252 wrote to memory of 2476	2252	dllmain.exe	32
PID 2252 wrote to memory of 2476	2252	dllmain.exe	32
PID 2252 wrote to memory of 2476	2252	dllmain.exe	32
PID 2252 wrote to memory of 1964	2252	dllmain.exe	34
PID 2252 wrote to memory of 1964	2252	dllmain.exe	34
PID 2252 wrote to memory of 1964	2252	dllmain.exe	34
PID 2252 wrote to memory of 1892	2252	dllmain.exe	36
PID 2252 wrote to memory of 1892	2252	dllmain.exe	36
PID 2252 wrote to memory of 1892	2252	dllmain.exe	36
PID 2252 wrote to memory of 1744	2252	dllmain.exe	39
PID 2252 wrote to memory of 1744	2252	dllmain.exe	39
PID 2252 wrote to memory of 1744	2252	dllmain.exe	39
PID 2252 wrote to memory of 2292	2252	dllmain.exe	41
PID 2252 wrote to memory of 2292	2252	dllmain.exe	41
PID 2252 wrote to memory of 2292	2252	dllmain.exe	41
PID 2252 wrote to memory of 540	2252	dllmain.exe	43
PID 2252 wrote to memory of 540	2252	dllmain.exe	43
PID 2252 wrote to memory of 540	2252	dllmain.exe	43
PID 2252 wrote to memory of 1132	2252	dllmain.exe	45
PID 2252 wrote to memory of 1132	2252	dllmain.exe	45
PID 2252 wrote to memory of 1132	2252	dllmain.exe	45

C:\Users\Admin\AppData\Local\Temp\dllmain.exe
"C:\Users\Admin\AppData\Local\Temp\dllmain.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2252
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\dllmain.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2688
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2752
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2476
- 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:1964
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1892
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2292
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:540
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1132

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

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
38f8610455057bc8027ef9effa9cc5dd

SHA1
3f6a7a0936b6b6d62e1a1e94053077bed6562ebd

SHA256
eee68bb973a51f51018289537fdd023109a5b25da23a706338424de1c473e5c2

SHA512
ad5c96dbb4e97defe51fb2d17d1a6eaef23fe2f8a170615715d60699b8d7f991e95d453aa5dafbdac304df3810d181f2ae059cd5428f2efb92cf32f69fc606f1

Download Submit
memory/540-45-0x000000001B590000-0x000000001B872000-memory.dmp

Filesize
2.9MB

Download
memory/2252-1-0x00000000013D0000-0x0000000001410000-memory.dmp

Filesize
256KB

Download
memory/2252-2-0x000007FEF5C20000-0x000007FEF660C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-49-0x000007FEF5C20000-0x000007FEF660C000-memory.dmp

Filesize
9.9MB

Download
memory/2252-0-0x000007FEF5C23000-0x000007FEF5C24000-memory.dmp

Filesize
4KB

Download
memory/2688-8-0x000000001B560000-0x000000001B842000-memory.dmp

Filesize
2.9MB

Download
memory/2688-11-0x000007FEEE760000-0x000007FEEF0FD000-memory.dmp

Filesize
9.6MB

Download
memory/2688-10-0x000007FEEE760000-0x000007FEEF0FD000-memory.dmp

Filesize
9.6MB

Download
memory/2688-14-0x000007FEEE760000-0x000007FEEF0FD000-memory.dmp

Filesize
9.6MB

Download
memory/2688-15-0x000007FEEE760000-0x000007FEEF0FD000-memory.dmp

Filesize
9.6MB

Download
memory/2688-12-0x000007FEEE760000-0x000007FEEF0FD000-memory.dmp

Filesize
9.6MB

Download
memory/2688-13-0x000007FEEE760000-0x000007FEEF0FD000-memory.dmp

Filesize
9.6MB

Download
memory/2688-9-0x0000000001D80000-0x0000000001D88000-memory.dmp

Filesize
32KB

Download
memory/2688-7-0x000007FEEEA1E000-0x000007FEEEA1F000-memory.dmp

Filesize
4KB

Download
memory/2752-21-0x000000001B690000-0x000000001B972000-memory.dmp

Filesize
2.9MB

Download
memory/2752-22-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download