umbral | f7f74aeaf94b242f73f0417796f4814c1a857eaa246ebcb7a667643d90af938e

Analysis

max time kernel
15s
max time network
16s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
20-09-2024 10:30

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General

Target

upx.exe
Size

231KB
MD5

88b64c5cad0453a14347d415f9d4f82b
SHA1

4a613e651418497885bf4861dc27fee379eee1b9
SHA256

f7f74aeaf94b242f73f0417796f4814c1a857eaa246ebcb7a667643d90af938e
SHA512

56775a3ce0c99998c0354a5d7485fbaf01e83f247412849abd2d81461decf0e9c4fa095d43e18be74fe7225df2b6cbbc2f98f4abf5611192ef66d83abee2d7d2
SSDEEP

6144:bloZM+rIkd8g+EtXHkv/iD4irHJzZqStHY5rWWDIPb8e1m4i:5oZtL+EP8irHJzZqStHY5rWWD2y

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2072-1-0x00000000002D0000-0x0000000000310000-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
2892	powershell.exe
2268	powershell.exe
1768	powershell.exe
2776	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2204	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
3020	PING.EXE
2204	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2220	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3020	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2072	upx.exe
2776	powershell.exe
2892	powershell.exe
2268	powershell.exe
2796	powershell.exe
1768	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2072	upx.exe
Token: SeIncreaseQuotaPrivilege	2936	wmic.exe
Token: SeSecurityPrivilege	2936	wmic.exe
Token: SeTakeOwnershipPrivilege	2936	wmic.exe
Token: SeLoadDriverPrivilege	2936	wmic.exe
Token: SeSystemProfilePrivilege	2936	wmic.exe
Token: SeSystemtimePrivilege	2936	wmic.exe
Token: SeProfSingleProcessPrivilege	2936	wmic.exe
Token: SeIncBasePriorityPrivilege	2936	wmic.exe
Token: SeCreatePagefilePrivilege	2936	wmic.exe
Token: SeBackupPrivilege	2936	wmic.exe
Token: SeRestorePrivilege	2936	wmic.exe
Token: SeShutdownPrivilege	2936	wmic.exe
Token: SeDebugPrivilege	2936	wmic.exe
Token: SeSystemEnvironmentPrivilege	2936	wmic.exe
Token: SeRemoteShutdownPrivilege	2936	wmic.exe
Token: SeUndockPrivilege	2936	wmic.exe
Token: SeManageVolumePrivilege	2936	wmic.exe
Token: 33	2936	wmic.exe
Token: 34	2936	wmic.exe
Token: 35	2936	wmic.exe
Token: SeIncreaseQuotaPrivilege	2936	wmic.exe
Token: SeSecurityPrivilege	2936	wmic.exe
Token: SeTakeOwnershipPrivilege	2936	wmic.exe
Token: SeLoadDriverPrivilege	2936	wmic.exe
Token: SeSystemProfilePrivilege	2936	wmic.exe
Token: SeSystemtimePrivilege	2936	wmic.exe
Token: SeProfSingleProcessPrivilege	2936	wmic.exe
Token: SeIncBasePriorityPrivilege	2936	wmic.exe
Token: SeCreatePagefilePrivilege	2936	wmic.exe
Token: SeBackupPrivilege	2936	wmic.exe
Token: SeRestorePrivilege	2936	wmic.exe
Token: SeShutdownPrivilege	2936	wmic.exe
Token: SeDebugPrivilege	2936	wmic.exe
Token: SeSystemEnvironmentPrivilege	2936	wmic.exe
Token: SeRemoteShutdownPrivilege	2936	wmic.exe
Token: SeUndockPrivilege	2936	wmic.exe
Token: SeManageVolumePrivilege	2936	wmic.exe
Token: 33	2936	wmic.exe
Token: 34	2936	wmic.exe
Token: 35	2936	wmic.exe
Token: SeDebugPrivilege	2776	powershell.exe
Token: SeDebugPrivilege	2892	powershell.exe
Token: SeDebugPrivilege	2268	powershell.exe
Token: SeDebugPrivilege	2796	powershell.exe
Token: SeIncreaseQuotaPrivilege	2680	wmic.exe
Token: SeSecurityPrivilege	2680	wmic.exe
Token: SeTakeOwnershipPrivilege	2680	wmic.exe
Token: SeLoadDriverPrivilege	2680	wmic.exe
Token: SeSystemProfilePrivilege	2680	wmic.exe
Token: SeSystemtimePrivilege	2680	wmic.exe
Token: SeProfSingleProcessPrivilege	2680	wmic.exe
Token: SeIncBasePriorityPrivilege	2680	wmic.exe
Token: SeCreatePagefilePrivilege	2680	wmic.exe
Token: SeBackupPrivilege	2680	wmic.exe
Token: SeRestorePrivilege	2680	wmic.exe
Token: SeShutdownPrivilege	2680	wmic.exe
Token: SeDebugPrivilege	2680	wmic.exe
Token: SeSystemEnvironmentPrivilege	2680	wmic.exe
Token: SeRemoteShutdownPrivilege	2680	wmic.exe
Token: SeUndockPrivilege	2680	wmic.exe
Token: SeManageVolumePrivilege	2680	wmic.exe
Token: 33	2680	wmic.exe
Token: 34	2680	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 2936	2072	upx.exe	30
PID 2072 wrote to memory of 2936	2072	upx.exe	30
PID 2072 wrote to memory of 2936	2072	upx.exe	30
PID 2072 wrote to memory of 2920	2072	upx.exe	33
PID 2072 wrote to memory of 2920	2072	upx.exe	33
PID 2072 wrote to memory of 2920	2072	upx.exe	33
PID 2072 wrote to memory of 2776	2072	upx.exe	35
PID 2072 wrote to memory of 2776	2072	upx.exe	35
PID 2072 wrote to memory of 2776	2072	upx.exe	35
PID 2072 wrote to memory of 2892	2072	upx.exe	37
PID 2072 wrote to memory of 2892	2072	upx.exe	37
PID 2072 wrote to memory of 2892	2072	upx.exe	37
PID 2072 wrote to memory of 2268	2072	upx.exe	40
PID 2072 wrote to memory of 2268	2072	upx.exe	40
PID 2072 wrote to memory of 2268	2072	upx.exe	40
PID 2072 wrote to memory of 2796	2072	upx.exe	42
PID 2072 wrote to memory of 2796	2072	upx.exe	42
PID 2072 wrote to memory of 2796	2072	upx.exe	42
PID 2072 wrote to memory of 2680	2072	upx.exe	44
PID 2072 wrote to memory of 2680	2072	upx.exe	44
PID 2072 wrote to memory of 2680	2072	upx.exe	44
PID 2072 wrote to memory of 292	2072	upx.exe	46
PID 2072 wrote to memory of 292	2072	upx.exe	46
PID 2072 wrote to memory of 292	2072	upx.exe	46
PID 2072 wrote to memory of 1204	2072	upx.exe	48
PID 2072 wrote to memory of 1204	2072	upx.exe	48
PID 2072 wrote to memory of 1204	2072	upx.exe	48
PID 2072 wrote to memory of 1768	2072	upx.exe	50
PID 2072 wrote to memory of 1768	2072	upx.exe	50
PID 2072 wrote to memory of 1768	2072	upx.exe	50
PID 2072 wrote to memory of 2220	2072	upx.exe	52
PID 2072 wrote to memory of 2220	2072	upx.exe	52
PID 2072 wrote to memory of 2220	2072	upx.exe	52
PID 2072 wrote to memory of 2204	2072	upx.exe	54
PID 2072 wrote to memory of 2204	2072	upx.exe	54
PID 2072 wrote to memory of 2204	2072	upx.exe	54
PID 2204 wrote to memory of 3020	2204	cmd.exe	56
PID 2204 wrote to memory of 3020	2204	cmd.exe	56
PID 2204 wrote to memory of 3020	2204	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2920	attrib.exe

C:\Users\Admin\AppData\Local\Temp\upx.exe
"C:\Users\Admin\AppData\Local\Temp\upx.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2936
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\upx.exe"
  2⤵
  - Views/modifies file attributes
  PID:2920
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\upx.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2776
- 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:2892
- 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:2268
- 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:2796
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2680
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:292
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1204
- 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:1768
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2220
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\upx.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2204
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3020

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\MLKRDKP0DIALPVPKUF8M.temp

Filesize
7KB

MD5
f0ec9b96671503e565d874a9e426aeb1

SHA1
1552b0f7d13316bbe2a0f5f8de13410593968de9

SHA256
400761b135aacfaebe29a7aa798aa6b78f50bb11ce26bbd9d081288f08fad264

SHA512
b8fadafe032700a34f154ced2acddc178a360fb785f75cc585db31b27565ee7e86fd8817a84f5c619989dca054a1968243463c68e92739d7cbbf002f99cac312

Download Submit
memory/1768-43-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/2072-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

Filesize
4KB

Download
memory/2072-1-0x00000000002D0000-0x0000000000310000-memory.dmp

Filesize
256KB

Download
memory/2072-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2072-47-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2776-7-0x000000001B510000-0x000000001B7F2000-memory.dmp

Filesize
2.9MB

Download
memory/2776-8-0x00000000021D0000-0x00000000021D8000-memory.dmp

Filesize
32KB

Download
memory/2892-14-0x000000001B5B0000-0x000000001B892000-memory.dmp

Filesize
2.9MB

Download
memory/2892-15-0x00000000026E0000-0x00000000026E8000-memory.dmp

Filesize
32KB

Download