umbral | 7d75b643c71063ea63b7cf241bf138c5546ac59399456776938ae1dee6dcfd0a

Analysis

max time kernel
12s
max time network
13s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
28-11-2024 16:20

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General

Target

1YMSykc.exe
Size

1.3MB
MD5

47daa94b04ff038ade5342c9de2d93e7
SHA1

e8918b3c526002213b94b5d497d63d2b98f6c354
SHA256

7d75b643c71063ea63b7cf241bf138c5546ac59399456776938ae1dee6dcfd0a
SHA512

abbfb1417edfde19694759d63ae175192ce180e937b443e4b485c32eee22389f319a618f9883934a6f878fd5d6530ab7b1f6058f616e79906f6adb8bb9115bf2
SSDEEP

24576:xuDXTIGaPhEYzUzA0nOLYuVuoWIT/ntnA0zggkJboApVzHLEQrdCNYffzHLS:kDjlabwz9OLYdm9zItRnzzG4fzu

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1310956212174458972/01ouKda6-3AmEWrhEQUcvcuJ4ujY0Otp_7PM-1jBl6WDXtIAmSNAI9bAOD8VNjVQtml0

Signatures

Detect Umbral payload 4 IoCs

resource	yara_rule
behavioral1/files/0x0008000000016650-9.dat	family_umbral
behavioral1/memory/2924-17-0x0000000001270000-0x00000000012F2000-memory.dmp	family_umbral
behavioral1/files/0x0007000000016b47-75.dat	family_umbral
behavioral1/memory/1488-77-0x0000000000AA0000-0x0000000000B22000-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
2140	powershell.exe
2008	powershell.exe
1292	powershell.exe
2160	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2924	Cc.exe
1488	CcC.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
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

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
1576	cmd.exe
236	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1948	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
236	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2924	Cc.exe
2140	powershell.exe
2008	powershell.exe
1292	powershell.exe
1560	powershell.exe
2160	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2924	Cc.exe
Token: SeIncreaseQuotaPrivilege	2752	wmic.exe
Token: SeSecurityPrivilege	2752	wmic.exe
Token: SeTakeOwnershipPrivilege	2752	wmic.exe
Token: SeLoadDriverPrivilege	2752	wmic.exe
Token: SeSystemProfilePrivilege	2752	wmic.exe
Token: SeSystemtimePrivilege	2752	wmic.exe
Token: SeProfSingleProcessPrivilege	2752	wmic.exe
Token: SeIncBasePriorityPrivilege	2752	wmic.exe
Token: SeCreatePagefilePrivilege	2752	wmic.exe
Token: SeBackupPrivilege	2752	wmic.exe
Token: SeRestorePrivilege	2752	wmic.exe
Token: SeShutdownPrivilege	2752	wmic.exe
Token: SeDebugPrivilege	2752	wmic.exe
Token: SeSystemEnvironmentPrivilege	2752	wmic.exe
Token: SeRemoteShutdownPrivilege	2752	wmic.exe
Token: SeUndockPrivilege	2752	wmic.exe
Token: SeManageVolumePrivilege	2752	wmic.exe
Token: 33	2752	wmic.exe
Token: 34	2752	wmic.exe
Token: 35	2752	wmic.exe
Token: SeIncreaseQuotaPrivilege	2752	wmic.exe
Token: SeSecurityPrivilege	2752	wmic.exe
Token: SeTakeOwnershipPrivilege	2752	wmic.exe
Token: SeLoadDriverPrivilege	2752	wmic.exe
Token: SeSystemProfilePrivilege	2752	wmic.exe
Token: SeSystemtimePrivilege	2752	wmic.exe
Token: SeProfSingleProcessPrivilege	2752	wmic.exe
Token: SeIncBasePriorityPrivilege	2752	wmic.exe
Token: SeCreatePagefilePrivilege	2752	wmic.exe
Token: SeBackupPrivilege	2752	wmic.exe
Token: SeRestorePrivilege	2752	wmic.exe
Token: SeShutdownPrivilege	2752	wmic.exe
Token: SeDebugPrivilege	2752	wmic.exe
Token: SeSystemEnvironmentPrivilege	2752	wmic.exe
Token: SeRemoteShutdownPrivilege	2752	wmic.exe
Token: SeUndockPrivilege	2752	wmic.exe
Token: SeManageVolumePrivilege	2752	wmic.exe
Token: 33	2752	wmic.exe
Token: 34	2752	wmic.exe
Token: 35	2752	wmic.exe
Token: SeDebugPrivilege	2140	powershell.exe
Token: SeDebugPrivilege	2008	powershell.exe
Token: SeDebugPrivilege	1292	powershell.exe
Token: SeDebugPrivilege	1560	powershell.exe
Token: SeIncreaseQuotaPrivilege	3040	wmic.exe
Token: SeSecurityPrivilege	3040	wmic.exe
Token: SeTakeOwnershipPrivilege	3040	wmic.exe
Token: SeLoadDriverPrivilege	3040	wmic.exe
Token: SeSystemProfilePrivilege	3040	wmic.exe
Token: SeSystemtimePrivilege	3040	wmic.exe
Token: SeProfSingleProcessPrivilege	3040	wmic.exe
Token: SeIncBasePriorityPrivilege	3040	wmic.exe
Token: SeCreatePagefilePrivilege	3040	wmic.exe
Token: SeBackupPrivilege	3040	wmic.exe
Token: SeRestorePrivilege	3040	wmic.exe
Token: SeShutdownPrivilege	3040	wmic.exe
Token: SeDebugPrivilege	3040	wmic.exe
Token: SeSystemEnvironmentPrivilege	3040	wmic.exe
Token: SeRemoteShutdownPrivilege	3040	wmic.exe
Token: SeUndockPrivilege	3040	wmic.exe
Token: SeManageVolumePrivilege	3040	wmic.exe
Token: 33	3040	wmic.exe
Token: 34	3040	wmic.exe

Suspicious use of WriteProcessMemory 45 IoCs

description	pid	Process	procid_target
PID 2316 wrote to memory of 2924	2316	1YMSykc.exe	32
PID 2316 wrote to memory of 2924	2316	1YMSykc.exe	32
PID 2316 wrote to memory of 2924	2316	1YMSykc.exe	32
PID 2924 wrote to memory of 2752	2924	Cc.exe	33
PID 2924 wrote to memory of 2752	2924	Cc.exe	33
PID 2924 wrote to memory of 2752	2924	Cc.exe	33
PID 2924 wrote to memory of 1060	2924	Cc.exe	36
PID 2924 wrote to memory of 1060	2924	Cc.exe	36
PID 2924 wrote to memory of 1060	2924	Cc.exe	36
PID 2924 wrote to memory of 2140	2924	Cc.exe	38
PID 2924 wrote to memory of 2140	2924	Cc.exe	38
PID 2924 wrote to memory of 2140	2924	Cc.exe	38
PID 2924 wrote to memory of 2008	2924	Cc.exe	40
PID 2924 wrote to memory of 2008	2924	Cc.exe	40
PID 2924 wrote to memory of 2008	2924	Cc.exe	40
PID 2924 wrote to memory of 1292	2924	Cc.exe	42
PID 2924 wrote to memory of 1292	2924	Cc.exe	42
PID 2924 wrote to memory of 1292	2924	Cc.exe	42
PID 2924 wrote to memory of 1560	2924	Cc.exe	44
PID 2924 wrote to memory of 1560	2924	Cc.exe	44
PID 2924 wrote to memory of 1560	2924	Cc.exe	44
PID 2924 wrote to memory of 3040	2924	Cc.exe	46
PID 2924 wrote to memory of 3040	2924	Cc.exe	46
PID 2924 wrote to memory of 3040	2924	Cc.exe	46
PID 2924 wrote to memory of 2228	2924	Cc.exe	48
PID 2924 wrote to memory of 2228	2924	Cc.exe	48
PID 2924 wrote to memory of 2228	2924	Cc.exe	48
PID 2924 wrote to memory of 3024	2924	Cc.exe	50
PID 2924 wrote to memory of 3024	2924	Cc.exe	50
PID 2924 wrote to memory of 3024	2924	Cc.exe	50
PID 2924 wrote to memory of 2160	2924	Cc.exe	52
PID 2924 wrote to memory of 2160	2924	Cc.exe	52
PID 2924 wrote to memory of 2160	2924	Cc.exe	52
PID 2924 wrote to memory of 1948	2924	Cc.exe	54
PID 2924 wrote to memory of 1948	2924	Cc.exe	54
PID 2924 wrote to memory of 1948	2924	Cc.exe	54
PID 2924 wrote to memory of 1576	2924	Cc.exe	56
PID 2924 wrote to memory of 1576	2924	Cc.exe	56
PID 2924 wrote to memory of 1576	2924	Cc.exe	56
PID 1576 wrote to memory of 236	1576	cmd.exe	58
PID 1576 wrote to memory of 236	1576	cmd.exe	58
PID 1576 wrote to memory of 236	1576	cmd.exe	58
PID 2316 wrote to memory of 1488	2316	1YMSykc.exe	59
PID 2316 wrote to memory of 1488	2316	1YMSykc.exe	59
PID 2316 wrote to memory of 1488	2316	1YMSykc.exe	59

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1060	attrib.exe

C:\Users\Admin\AppData\Local\Temp\1YMSykc.exe
"C:\Users\Admin\AppData\Local\Temp\1YMSykc.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2316
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2924
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2752
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe"
    3⤵
    - Views/modifies file attributes
    PID:1060
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2140
- - 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
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2008
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1292
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1560
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3040
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2228
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:3024
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    PID:2160
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:1948
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Cc.exe" && pause
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:1576
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:236
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe"
  2⤵
  - Executes dropped EXE
  PID:1488

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\Local\Temp\RarSFX0\Cc.exe

Filesize
492KB

MD5
4e6a63942f5205cc84a200ebc4aebc2e

SHA1
19ff74550c41a562e1b2b9cbe3c67608f685aefc

SHA256
fef58748adf375c23f2604f9c422f353a7fc969ca32bab8bf965b2648bf178d4

SHA512
34eb34a4358cfdf19563616659915ef0a895cbf1d37181fa4c003c1d904744c0ce664f56a287b2f2eb631e0f73af90e08b252d4bd090fe5054ed14890c251729

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\CcC.exe

Filesize
492KB

MD5
9e1d91acd2ee7f84fdb7374b66b28cf9

SHA1
36701c1a18a9fafe10e3d8fa2318453d7d193d5f

SHA256
fe47fabeb2de30c850fda2ee6f5af68de6197e84f748d2d81855db4a27755703

SHA512
eaf5e72e466dd31083156ad71f73bfa474219c2b4a753ec2ef1f7514ac3706a8d20018d07432a9ef68779300b8f13378a767625d8ea8722a1dab12ba91c0514a

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

Filesize
7KB

MD5
5eaf18a2da087a01b90e1f64f0b1b45f

SHA1
7df188f9172a29690035a2dff64c01213ddd508d

SHA256
3cebed2ce3a8614076bce29cc64c5ae318f718915fd70e604a3080eb5236da83

SHA512
5f9f6c418994cb58aab9ec502692e9b3660f4f59047418a6a2d7115bedbd420ce8217772e317b335c3701314e1995a76b41f648ab71610e36cad2798011bed47

Download Submit
memory/1488-77-0x0000000000AA0000-0x0000000000B22000-memory.dmp

Filesize
520KB

Download
memory/2008-31-0x0000000002750000-0x0000000002758000-memory.dmp

Filesize
32KB

Download
memory/2008-30-0x000000001B630000-0x000000001B912000-memory.dmp

Filesize
2.9MB

Download
memory/2140-24-0x0000000001F80000-0x0000000001F88000-memory.dmp

Filesize
32KB

Download
memory/2140-23-0x000000001B590000-0x000000001B872000-memory.dmp

Filesize
2.9MB

Download
memory/2160-62-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2316-6-0x00000000021E0000-0x00000000021F0000-memory.dmp

Filesize
64KB

Download
memory/2924-18-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

Filesize
9.9MB

Download
memory/2924-67-0x000007FEF5DA0000-0x000007FEF678C000-memory.dmp

Filesize
9.9MB

Download
memory/2924-17-0x0000000001270000-0x00000000012F2000-memory.dmp

Filesize
520KB

Download
memory/2924-16-0x000007FEF5DA3000-0x000007FEF5DA4000-memory.dmp

Filesize
4KB

Download