umbral | 2744f1315bfa21aef381540d3ad53bc90cf15a8513905aba442b4610e8f0c337

Analysis

max time kernel
121s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29-12-2024 10:56

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

upx.exe
Size

230KB
MD5

de2d4e3d82dc91ee44c91793de896c7a
SHA1

3b8db665d3666be6a4234c801b9ca93ced36655e
SHA256

2744f1315bfa21aef381540d3ad53bc90cf15a8513905aba442b4610e8f0c337
SHA512

6a257e6df13bd6dcc1452fa692515b955896f1141aad84110ceaad5a3a929607586c849bcfdb161d648e89c53d747a39e564551172fd36c1e440618346b7b40f
SSDEEP

6144:jloZM+rIkd8g+EtXHkv/iD4Ff6Cj5nsAv7OXZkQlPJXb8e1mq/i:BoZtL+EP8t6Cj5nsAv7OXZkQllNq

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2012-1-0x0000000001200000-0x0000000001240000-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

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

execution

PowerShell

T1059.001

pid	Process
2856	powershell.exe
1780	powershell.exe
2312	powershell.exe
2608	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
2516	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
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
2516	cmd.exe
2364	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2944	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2364	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2012	upx.exe
2856	powershell.exe
2312	powershell.exe
2608	powershell.exe
1252	powershell.exe
1780	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2012	upx.exe
Token: SeIncreaseQuotaPrivilege	2288	wmic.exe
Token: SeSecurityPrivilege	2288	wmic.exe
Token: SeTakeOwnershipPrivilege	2288	wmic.exe
Token: SeLoadDriverPrivilege	2288	wmic.exe
Token: SeSystemProfilePrivilege	2288	wmic.exe
Token: SeSystemtimePrivilege	2288	wmic.exe
Token: SeProfSingleProcessPrivilege	2288	wmic.exe
Token: SeIncBasePriorityPrivilege	2288	wmic.exe
Token: SeCreatePagefilePrivilege	2288	wmic.exe
Token: SeBackupPrivilege	2288	wmic.exe
Token: SeRestorePrivilege	2288	wmic.exe
Token: SeShutdownPrivilege	2288	wmic.exe
Token: SeDebugPrivilege	2288	wmic.exe
Token: SeSystemEnvironmentPrivilege	2288	wmic.exe
Token: SeRemoteShutdownPrivilege	2288	wmic.exe
Token: SeUndockPrivilege	2288	wmic.exe
Token: SeManageVolumePrivilege	2288	wmic.exe
Token: 33	2288	wmic.exe
Token: 34	2288	wmic.exe
Token: 35	2288	wmic.exe
Token: SeIncreaseQuotaPrivilege	2288	wmic.exe
Token: SeSecurityPrivilege	2288	wmic.exe
Token: SeTakeOwnershipPrivilege	2288	wmic.exe
Token: SeLoadDriverPrivilege	2288	wmic.exe
Token: SeSystemProfilePrivilege	2288	wmic.exe
Token: SeSystemtimePrivilege	2288	wmic.exe
Token: SeProfSingleProcessPrivilege	2288	wmic.exe
Token: SeIncBasePriorityPrivilege	2288	wmic.exe
Token: SeCreatePagefilePrivilege	2288	wmic.exe
Token: SeBackupPrivilege	2288	wmic.exe
Token: SeRestorePrivilege	2288	wmic.exe
Token: SeShutdownPrivilege	2288	wmic.exe
Token: SeDebugPrivilege	2288	wmic.exe
Token: SeSystemEnvironmentPrivilege	2288	wmic.exe
Token: SeRemoteShutdownPrivilege	2288	wmic.exe
Token: SeUndockPrivilege	2288	wmic.exe
Token: SeManageVolumePrivilege	2288	wmic.exe
Token: 33	2288	wmic.exe
Token: 34	2288	wmic.exe
Token: 35	2288	wmic.exe
Token: SeDebugPrivilege	2856	powershell.exe
Token: SeDebugPrivilege	2312	powershell.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeDebugPrivilege	1252	powershell.exe
Token: SeIncreaseQuotaPrivilege	636	wmic.exe
Token: SeSecurityPrivilege	636	wmic.exe
Token: SeTakeOwnershipPrivilege	636	wmic.exe
Token: SeLoadDriverPrivilege	636	wmic.exe
Token: SeSystemProfilePrivilege	636	wmic.exe
Token: SeSystemtimePrivilege	636	wmic.exe
Token: SeProfSingleProcessPrivilege	636	wmic.exe
Token: SeIncBasePriorityPrivilege	636	wmic.exe
Token: SeCreatePagefilePrivilege	636	wmic.exe
Token: SeBackupPrivilege	636	wmic.exe
Token: SeRestorePrivilege	636	wmic.exe
Token: SeShutdownPrivilege	636	wmic.exe
Token: SeDebugPrivilege	636	wmic.exe
Token: SeSystemEnvironmentPrivilege	636	wmic.exe
Token: SeRemoteShutdownPrivilege	636	wmic.exe
Token: SeUndockPrivilege	636	wmic.exe
Token: SeManageVolumePrivilege	636	wmic.exe
Token: 33	636	wmic.exe
Token: 34	636	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 2288	2012	upx.exe	30
PID 2012 wrote to memory of 2288	2012	upx.exe	30
PID 2012 wrote to memory of 2288	2012	upx.exe	30
PID 2012 wrote to memory of 2736	2012	upx.exe	33
PID 2012 wrote to memory of 2736	2012	upx.exe	33
PID 2012 wrote to memory of 2736	2012	upx.exe	33
PID 2012 wrote to memory of 2856	2012	upx.exe	35
PID 2012 wrote to memory of 2856	2012	upx.exe	35
PID 2012 wrote to memory of 2856	2012	upx.exe	35
PID 2012 wrote to memory of 2312	2012	upx.exe	37
PID 2012 wrote to memory of 2312	2012	upx.exe	37
PID 2012 wrote to memory of 2312	2012	upx.exe	37
PID 2012 wrote to memory of 2608	2012	upx.exe	39
PID 2012 wrote to memory of 2608	2012	upx.exe	39
PID 2012 wrote to memory of 2608	2012	upx.exe	39
PID 2012 wrote to memory of 1252	2012	upx.exe	41
PID 2012 wrote to memory of 1252	2012	upx.exe	41
PID 2012 wrote to memory of 1252	2012	upx.exe	41
PID 2012 wrote to memory of 636	2012	upx.exe	43
PID 2012 wrote to memory of 636	2012	upx.exe	43
PID 2012 wrote to memory of 636	2012	upx.exe	43
PID 2012 wrote to memory of 2028	2012	upx.exe	45
PID 2012 wrote to memory of 2028	2012	upx.exe	45
PID 2012 wrote to memory of 2028	2012	upx.exe	45
PID 2012 wrote to memory of 1044	2012	upx.exe	47
PID 2012 wrote to memory of 1044	2012	upx.exe	47
PID 2012 wrote to memory of 1044	2012	upx.exe	47
PID 2012 wrote to memory of 1780	2012	upx.exe	49
PID 2012 wrote to memory of 1780	2012	upx.exe	49
PID 2012 wrote to memory of 1780	2012	upx.exe	49
PID 2012 wrote to memory of 2944	2012	upx.exe	51
PID 2012 wrote to memory of 2944	2012	upx.exe	51
PID 2012 wrote to memory of 2944	2012	upx.exe	51
PID 2012 wrote to memory of 2516	2012	upx.exe	53
PID 2012 wrote to memory of 2516	2012	upx.exe	53
PID 2012 wrote to memory of 2516	2012	upx.exe	53
PID 2516 wrote to memory of 2364	2516	cmd.exe	55
PID 2516 wrote to memory of 2364	2516	cmd.exe	55
PID 2516 wrote to memory of 2364	2516	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2736	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:2012
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2288
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\upx.exe"
  2⤵
  - Views/modifies file attributes
  PID:2736
- 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:2856
- 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:2312
- 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:2608
- 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:636
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2028
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1044
- 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:1780
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2944
- 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:2516
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2364

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\RFRYVE00ZHB542YD03DK.temp

Filesize
7KB

MD5
e14b3873ec003afa145253d2d9a493fa

SHA1
587fb89f0a46ae19922ff79e06d077d4f6e5ac8b

SHA256
f2333453b323f4691e924a0bf2eb99b24968924896acad80207f8470d5c395ee

SHA512
c7640ff74e73496e46985a0876226f5dd430a05514038c13a9f5cd1faa990488aa938d3ed84f5a18c2ce7e7249c49ef0996ff8cb2e8925b5346fef63d84c4283

Download Submit
memory/1780-44-0x0000000001D20000-0x0000000001D28000-memory.dmp

Filesize
32KB

Download
memory/2012-0-0x000007FEF5BD3000-0x000007FEF5BD4000-memory.dmp

Filesize
4KB

Download
memory/2012-1-0x0000000001200000-0x0000000001240000-memory.dmp

Filesize
256KB

Download
memory/2012-2-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2012-48-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2312-14-0x000000001B720000-0x000000001BA02000-memory.dmp

Filesize
2.9MB

Download
memory/2312-15-0x0000000001EC0000-0x0000000001EC8000-memory.dmp

Filesize
32KB

Download
memory/2856-7-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2856-8-0x00000000029E0000-0x00000000029E8000-memory.dmp

Filesize
32KB

Download