umbral | 8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
16-11-2024 01:28

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General

Target

8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe
Size

227KB
MD5

3a1c193849903781020935a8ad07d07a
SHA1

fef92d8486cebb4d974df2faf04ae37bb0320d6f
SHA256

8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b
SHA512

6f5188d12915c449b7e61842e044573b1b4f2557bbab8f6c71c1e06cccaa04a313af2db0f074a59a8a25919b2b12367635a479a65fd57d3b66d5ff15b4d72246
SSDEEP

6144:+loZM+rIkd8g+EtXHkv/iD4tqjy0ad1+47mEl5Q8hb8e1mcgi9:ooZtL+EP8tqjy0ad1+47mEl5QkL59

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2536-1-0x0000000000CD0000-0x0000000000D10000-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
2716	powershell.exe
2640	powershell.exe
340	powershell.exe
1412	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe

Deletes itself 1 IoCs

pid	Process
2076	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
2076	cmd.exe
2192	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2240	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2192	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe
2716	powershell.exe
2640	powershell.exe
340	powershell.exe
2936	powershell.exe
1412	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe
Token: SeIncreaseQuotaPrivilege	2896	wmic.exe
Token: SeSecurityPrivilege	2896	wmic.exe
Token: SeTakeOwnershipPrivilege	2896	wmic.exe
Token: SeLoadDriverPrivilege	2896	wmic.exe
Token: SeSystemProfilePrivilege	2896	wmic.exe
Token: SeSystemtimePrivilege	2896	wmic.exe
Token: SeProfSingleProcessPrivilege	2896	wmic.exe
Token: SeIncBasePriorityPrivilege	2896	wmic.exe
Token: SeCreatePagefilePrivilege	2896	wmic.exe
Token: SeBackupPrivilege	2896	wmic.exe
Token: SeRestorePrivilege	2896	wmic.exe
Token: SeShutdownPrivilege	2896	wmic.exe
Token: SeDebugPrivilege	2896	wmic.exe
Token: SeSystemEnvironmentPrivilege	2896	wmic.exe
Token: SeRemoteShutdownPrivilege	2896	wmic.exe
Token: SeUndockPrivilege	2896	wmic.exe
Token: SeManageVolumePrivilege	2896	wmic.exe
Token: 33	2896	wmic.exe
Token: 34	2896	wmic.exe
Token: 35	2896	wmic.exe
Token: SeIncreaseQuotaPrivilege	2896	wmic.exe
Token: SeSecurityPrivilege	2896	wmic.exe
Token: SeTakeOwnershipPrivilege	2896	wmic.exe
Token: SeLoadDriverPrivilege	2896	wmic.exe
Token: SeSystemProfilePrivilege	2896	wmic.exe
Token: SeSystemtimePrivilege	2896	wmic.exe
Token: SeProfSingleProcessPrivilege	2896	wmic.exe
Token: SeIncBasePriorityPrivilege	2896	wmic.exe
Token: SeCreatePagefilePrivilege	2896	wmic.exe
Token: SeBackupPrivilege	2896	wmic.exe
Token: SeRestorePrivilege	2896	wmic.exe
Token: SeShutdownPrivilege	2896	wmic.exe
Token: SeDebugPrivilege	2896	wmic.exe
Token: SeSystemEnvironmentPrivilege	2896	wmic.exe
Token: SeRemoteShutdownPrivilege	2896	wmic.exe
Token: SeUndockPrivilege	2896	wmic.exe
Token: SeManageVolumePrivilege	2896	wmic.exe
Token: 33	2896	wmic.exe
Token: 34	2896	wmic.exe
Token: 35	2896	wmic.exe
Token: SeDebugPrivilege	2716	powershell.exe
Token: SeDebugPrivilege	2640	powershell.exe
Token: SeDebugPrivilege	340	powershell.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeIncreaseQuotaPrivilege	2948	wmic.exe
Token: SeSecurityPrivilege	2948	wmic.exe
Token: SeTakeOwnershipPrivilege	2948	wmic.exe
Token: SeLoadDriverPrivilege	2948	wmic.exe
Token: SeSystemProfilePrivilege	2948	wmic.exe
Token: SeSystemtimePrivilege	2948	wmic.exe
Token: SeProfSingleProcessPrivilege	2948	wmic.exe
Token: SeIncBasePriorityPrivilege	2948	wmic.exe
Token: SeCreatePagefilePrivilege	2948	wmic.exe
Token: SeBackupPrivilege	2948	wmic.exe
Token: SeRestorePrivilege	2948	wmic.exe
Token: SeShutdownPrivilege	2948	wmic.exe
Token: SeDebugPrivilege	2948	wmic.exe
Token: SeSystemEnvironmentPrivilege	2948	wmic.exe
Token: SeRemoteShutdownPrivilege	2948	wmic.exe
Token: SeUndockPrivilege	2948	wmic.exe
Token: SeManageVolumePrivilege	2948	wmic.exe
Token: 33	2948	wmic.exe
Token: 34	2948	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2896	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	31
PID 2536 wrote to memory of 2896	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	31
PID 2536 wrote to memory of 2896	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	31
PID 2536 wrote to memory of 2868	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	34
PID 2536 wrote to memory of 2868	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	34
PID 2536 wrote to memory of 2868	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	34
PID 2536 wrote to memory of 2716	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	36
PID 2536 wrote to memory of 2716	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	36
PID 2536 wrote to memory of 2716	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	36
PID 2536 wrote to memory of 2640	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	38
PID 2536 wrote to memory of 2640	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	38
PID 2536 wrote to memory of 2640	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	38
PID 2536 wrote to memory of 340	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	40
PID 2536 wrote to memory of 340	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	40
PID 2536 wrote to memory of 340	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	40
PID 2536 wrote to memory of 2936	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	42
PID 2536 wrote to memory of 2936	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	42
PID 2536 wrote to memory of 2936	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	42
PID 2536 wrote to memory of 2948	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	44
PID 2536 wrote to memory of 2948	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	44
PID 2536 wrote to memory of 2948	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	44
PID 2536 wrote to memory of 2348	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	46
PID 2536 wrote to memory of 2348	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	46
PID 2536 wrote to memory of 2348	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	46
PID 2536 wrote to memory of 2144	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	48
PID 2536 wrote to memory of 2144	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	48
PID 2536 wrote to memory of 2144	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	48
PID 2536 wrote to memory of 1412	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	50
PID 2536 wrote to memory of 1412	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	50
PID 2536 wrote to memory of 1412	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	50
PID 2536 wrote to memory of 2240	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	52
PID 2536 wrote to memory of 2240	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	52
PID 2536 wrote to memory of 2240	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	52
PID 2536 wrote to memory of 2076	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	54
PID 2536 wrote to memory of 2076	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	54
PID 2536 wrote to memory of 2076	2536	8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe	54
PID 2076 wrote to memory of 2192	2076	cmd.exe	56
PID 2076 wrote to memory of 2192	2076	cmd.exe	56
PID 2076 wrote to memory of 2192	2076	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2868	attrib.exe

C:\Users\Admin\AppData\Local\Temp\8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe
"C:\Users\Admin\AppData\Local\Temp\8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2896
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe"
  2⤵
  - Views/modifies file attributes
  PID:2868
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2716
- 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:2640
- 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:340
- 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:2936
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2948
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2348
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2144
- 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:1412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2240
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\8fb16a6820997425bafc7635fe37436801301ca8dc445f57db97dd264c5ccf0b.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2076
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2192

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
63b87ec6fd863e459ce1eb26f5e8102d

SHA1
e826e8034b0b50bfcaa12db2e4474a266c67c513

SHA256
0352af2740e86b33b000d4f1ef948336ddc71b3d77fe8b1b046f7020588b8926

SHA512
632dbfa7eae704bc04d7d7e2c0760b27f47dc9844c68e808e63b58f0466e4964fb1fd054e0605c65cdc17e3480dcb24890d821a6da53b1a200b17fee9f7c6aeb

Download Submit
memory/1412-43-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/1412-44-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/2536-0-0x000007FEF5DC3000-0x000007FEF5DC4000-memory.dmp

Filesize
4KB

Download
memory/2536-1-0x0000000000CD0000-0x0000000000D10000-memory.dmp

Filesize
256KB

Download
memory/2536-2-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2536-48-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/2640-14-0x000000001B5C0000-0x000000001B8A2000-memory.dmp

Filesize
2.9MB

Download
memory/2640-15-0x0000000002340000-0x0000000002348000-memory.dmp

Filesize
32KB

Download
memory/2716-7-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download
memory/2716-8-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download