umbral | 084d8dae75296d5278702a13359c8869ea6919de5e0f3e939d0e786771238614

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
22-08-2024 22:58

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General

Target

cbe01fe4646cb0bf553e56fab6049ea0N.exe
Size

332KB
MD5

cbe01fe4646cb0bf553e56fab6049ea0
SHA1

74323c61e5e6af54a185db9055a63b58164a0875
SHA256

084d8dae75296d5278702a13359c8869ea6919de5e0f3e939d0e786771238614
SHA512

231f36ca6f9904dee27d8bd663f2210686f1b999341bf5da4aa6726785cbfa78df9af9ca2095cc918682ec215e92509beb34ea294b88eeabfa74f263ec801bc3
SSDEEP

6144:tqS31vVrANegm9Wv3IOm+I3Wy6VlWd40pKr/zZ5wBJqsycOPAahF:4S7PWvSR3WTVl50wrN5wDq//A

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1270503478661218436/lYjczFpScyBiK0vTfbrRGM7w5iZQZYGn5ZBMz2hf0cegpXKTgRn6umRYCB_UZguXyf4o

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x00090000000120f8-8.dat	family_umbral
behavioral1/memory/2560-11-0x0000000000C40000-0x0000000000C80000-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
572	powershell.exe
1796	powershell.exe
2248	powershell.exe
1676	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
2560	Umbral.exe
1644	svchost.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
10	discord.com
11	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
7	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
1948	cmd.exe
992	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2348	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
992	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2560	Umbral.exe
1676	powershell.exe
1796	powershell.exe
2248	powershell.exe
1040	powershell.exe
572	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2560	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2748	wmic.exe
Token: SeSecurityPrivilege	2748	wmic.exe
Token: SeTakeOwnershipPrivilege	2748	wmic.exe
Token: SeLoadDriverPrivilege	2748	wmic.exe
Token: SeSystemProfilePrivilege	2748	wmic.exe
Token: SeSystemtimePrivilege	2748	wmic.exe
Token: SeProfSingleProcessPrivilege	2748	wmic.exe
Token: SeIncBasePriorityPrivilege	2748	wmic.exe
Token: SeCreatePagefilePrivilege	2748	wmic.exe
Token: SeBackupPrivilege	2748	wmic.exe
Token: SeRestorePrivilege	2748	wmic.exe
Token: SeShutdownPrivilege	2748	wmic.exe
Token: SeDebugPrivilege	2748	wmic.exe
Token: SeSystemEnvironmentPrivilege	2748	wmic.exe
Token: SeRemoteShutdownPrivilege	2748	wmic.exe
Token: SeUndockPrivilege	2748	wmic.exe
Token: SeManageVolumePrivilege	2748	wmic.exe
Token: 33	2748	wmic.exe
Token: 34	2748	wmic.exe
Token: 35	2748	wmic.exe
Token: SeIncreaseQuotaPrivilege	2748	wmic.exe
Token: SeSecurityPrivilege	2748	wmic.exe
Token: SeTakeOwnershipPrivilege	2748	wmic.exe
Token: SeLoadDriverPrivilege	2748	wmic.exe
Token: SeSystemProfilePrivilege	2748	wmic.exe
Token: SeSystemtimePrivilege	2748	wmic.exe
Token: SeProfSingleProcessPrivilege	2748	wmic.exe
Token: SeIncBasePriorityPrivilege	2748	wmic.exe
Token: SeCreatePagefilePrivilege	2748	wmic.exe
Token: SeBackupPrivilege	2748	wmic.exe
Token: SeRestorePrivilege	2748	wmic.exe
Token: SeShutdownPrivilege	2748	wmic.exe
Token: SeDebugPrivilege	2748	wmic.exe
Token: SeSystemEnvironmentPrivilege	2748	wmic.exe
Token: SeRemoteShutdownPrivilege	2748	wmic.exe
Token: SeUndockPrivilege	2748	wmic.exe
Token: SeManageVolumePrivilege	2748	wmic.exe
Token: 33	2748	wmic.exe
Token: 34	2748	wmic.exe
Token: 35	2748	wmic.exe
Token: SeDebugPrivilege	1676	powershell.exe
Token: SeDebugPrivilege	1796	powershell.exe
Token: SeDebugPrivilege	2248	powershell.exe
Token: SeDebugPrivilege	1040	powershell.exe
Token: SeIncreaseQuotaPrivilege	328	wmic.exe
Token: SeSecurityPrivilege	328	wmic.exe
Token: SeTakeOwnershipPrivilege	328	wmic.exe
Token: SeLoadDriverPrivilege	328	wmic.exe
Token: SeSystemProfilePrivilege	328	wmic.exe
Token: SeSystemtimePrivilege	328	wmic.exe
Token: SeProfSingleProcessPrivilege	328	wmic.exe
Token: SeIncBasePriorityPrivilege	328	wmic.exe
Token: SeCreatePagefilePrivilege	328	wmic.exe
Token: SeBackupPrivilege	328	wmic.exe
Token: SeRestorePrivilege	328	wmic.exe
Token: SeShutdownPrivilege	328	wmic.exe
Token: SeDebugPrivilege	328	wmic.exe
Token: SeSystemEnvironmentPrivilege	328	wmic.exe
Token: SeRemoteShutdownPrivilege	328	wmic.exe
Token: SeUndockPrivilege	328	wmic.exe
Token: SeManageVolumePrivilege	328	wmic.exe
Token: 33	328	wmic.exe
Token: 34	328	wmic.exe

Suspicious use of WriteProcessMemory 45 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 2560	2416	cbe01fe4646cb0bf553e56fab6049ea0N.exe	30
PID 2416 wrote to memory of 2560	2416	cbe01fe4646cb0bf553e56fab6049ea0N.exe	30
PID 2416 wrote to memory of 2560	2416	cbe01fe4646cb0bf553e56fab6049ea0N.exe	30
PID 2416 wrote to memory of 1644	2416	cbe01fe4646cb0bf553e56fab6049ea0N.exe	31
PID 2416 wrote to memory of 1644	2416	cbe01fe4646cb0bf553e56fab6049ea0N.exe	31
PID 2416 wrote to memory of 1644	2416	cbe01fe4646cb0bf553e56fab6049ea0N.exe	31
PID 2560 wrote to memory of 2748	2560	Umbral.exe	34
PID 2560 wrote to memory of 2748	2560	Umbral.exe	34
PID 2560 wrote to memory of 2748	2560	Umbral.exe	34
PID 2560 wrote to memory of 2268	2560	Umbral.exe	36
PID 2560 wrote to memory of 2268	2560	Umbral.exe	36
PID 2560 wrote to memory of 2268	2560	Umbral.exe	36
PID 2560 wrote to memory of 1676	2560	Umbral.exe	38
PID 2560 wrote to memory of 1676	2560	Umbral.exe	38
PID 2560 wrote to memory of 1676	2560	Umbral.exe	38
PID 2560 wrote to memory of 1796	2560	Umbral.exe	40
PID 2560 wrote to memory of 1796	2560	Umbral.exe	40
PID 2560 wrote to memory of 1796	2560	Umbral.exe	40
PID 2560 wrote to memory of 2248	2560	Umbral.exe	42
PID 2560 wrote to memory of 2248	2560	Umbral.exe	42
PID 2560 wrote to memory of 2248	2560	Umbral.exe	42
PID 2560 wrote to memory of 1040	2560	Umbral.exe	44
PID 2560 wrote to memory of 1040	2560	Umbral.exe	44
PID 2560 wrote to memory of 1040	2560	Umbral.exe	44
PID 2560 wrote to memory of 328	2560	Umbral.exe	46
PID 2560 wrote to memory of 328	2560	Umbral.exe	46
PID 2560 wrote to memory of 328	2560	Umbral.exe	46
PID 2560 wrote to memory of 1752	2560	Umbral.exe	48
PID 2560 wrote to memory of 1752	2560	Umbral.exe	48
PID 2560 wrote to memory of 1752	2560	Umbral.exe	48
PID 2560 wrote to memory of 1664	2560	Umbral.exe	50
PID 2560 wrote to memory of 1664	2560	Umbral.exe	50
PID 2560 wrote to memory of 1664	2560	Umbral.exe	50
PID 2560 wrote to memory of 572	2560	Umbral.exe	52
PID 2560 wrote to memory of 572	2560	Umbral.exe	52
PID 2560 wrote to memory of 572	2560	Umbral.exe	52
PID 2560 wrote to memory of 2348	2560	Umbral.exe	54
PID 2560 wrote to memory of 2348	2560	Umbral.exe	54
PID 2560 wrote to memory of 2348	2560	Umbral.exe	54
PID 2560 wrote to memory of 1948	2560	Umbral.exe	56
PID 2560 wrote to memory of 1948	2560	Umbral.exe	56
PID 2560 wrote to memory of 1948	2560	Umbral.exe	56
PID 1948 wrote to memory of 992	1948	cmd.exe	58
PID 1948 wrote to memory of 992	1948	cmd.exe	58
PID 1948 wrote to memory of 992	1948	cmd.exe	58

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2268	attrib.exe

C:\Users\Admin\AppData\Local\Temp\cbe01fe4646cb0bf553e56fab6049ea0N.exe
"C:\Users\Admin\AppData\Local\Temp\cbe01fe4646cb0bf553e56fab6049ea0N.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2416
- C:\Users\Admin\AppData\Local\Temp\Umbral.exe
  "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2560
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2748
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
    3⤵
    - Views/modifies file attributes
    PID:2268
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1676
- - 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:1796
- - 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:2248
- - 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:1040
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:328
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:1752
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:1664
- - 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:572
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:2348
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Umbral.exe" && pause
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:1948
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:992
- C:\Users\Admin\AppData\Local\Temp\svchost.exe
  "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
  2⤵
  - Executes dropped EXE
  PID:1644

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\Umbral.exe

Filesize
231KB

MD5
a733fa354827ee6841d92540f7031823

SHA1
12d0420484d4aee5945633298824003c1715815a

SHA256
9da608bc82962c952329648689186ab278007ec0895ce14d136dd0cc48eddc34

SHA512
ce699c379824cf4134cc134b9d803fe6cd7b2e3ab9a79af8ddd8f95713ffe67f96ab2fd04310f4700715bf9db2d1a8a0699bf916f6405fdcf6c66789e9764832

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

Filesize
479KB

MD5
dd6cec99223a8139819a04b08a53ef6a

SHA1
7941a00b799f614af2d212322304ed3c403cdc6b

SHA256
8f541cf02aa94b2d9a9f6c8ef1cd88ed56211394ec209d12a48b3507846ef65d

SHA512
d18b8d4ca61c35678ef220f90e09d2a3dea36beb46b76aaf63605c521ffcc34d77e3c1a7ad323f749edf4b0749da3eaf80b7b3ea50af5eeaae5d96ba3cb3aff7

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\23Q7FHT4F3A95VTU20UE.temp

Filesize
7KB

MD5
da2c17c79c881f64f251c90efc68d398

SHA1
6306d0b0085881fb9a2ab5069098f428c9b31df7

SHA256
06f22ed88a35b6d84a6bdc8290fb52f1d130aee946192fc6303ba97d7cf936a6

SHA512
c05d74393c9847ed6db094a59c80726e56e415c6fbf0ac121ca0c6c8938e0b1e55b9ca50934abf905bf012b65d6ef764998af1b1a6b815d13ff87ab30ba327cb

Download Submit
memory/1644-14-0x0000000000FD0000-0x000000000104E000-memory.dmp

Filesize
504KB

Download
memory/1676-22-0x000000001B6E0000-0x000000001B9C2000-memory.dmp

Filesize
2.9MB

Download
memory/1676-23-0x00000000028D0000-0x00000000028D8000-memory.dmp

Filesize
32KB

Download
memory/1796-29-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/1796-30-0x0000000002710000-0x0000000002718000-memory.dmp

Filesize
32KB

Download
memory/2416-16-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

Filesize
9.9MB

Download
memory/2416-0-0x000007FEF5C93000-0x000007FEF5C94000-memory.dmp

Filesize
4KB

Download
memory/2416-7-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

Filesize
9.9MB

Download
memory/2416-1-0x0000000000AF0000-0x0000000000B4A000-memory.dmp

Filesize
360KB

Download
memory/2560-17-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

Filesize
9.9MB

Download
memory/2560-11-0x0000000000C40000-0x0000000000C80000-memory.dmp

Filesize
256KB

Download
memory/2560-15-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

Filesize
9.9MB

Download
memory/2560-62-0x000007FEF5C90000-0x000007FEF667C000-memory.dmp

Filesize
9.9MB

Download