umbral | df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf

Analysis

max time kernel
117s
max time network
122s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
18-08-2024 21:53

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General

Target

df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe
Size

492KB
MD5

c6082923c754876542e9e9819763aa00
SHA1

1f6958604f623c279751c0ae84e1bbc46548de65
SHA256

df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf
SHA512

e65208f424b8da472eb0a30ec38d57a57e85e2f9247c31157e75e3a08710075ef02cfc25a650bb395326c9115d0f93d177472aeefeb76f54545d1b264b49ece5
SSDEEP

6144:XloZM+rIkd8g+EtXHkv/iD4NkxjfVeGJqMFXSy3DoZb8e1mNiE:1oZtL+EP8NkxjfVeGJqMFXSy3DQrE

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/304-1-0x0000000000D50000-0x0000000000DD0000-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
1728	powershell.exe
2072	powershell.exe
464	powershell.exe
2804	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe

Deletes itself 1 IoCs

pid	Process
2084	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
2084	cmd.exe
2444	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3020	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2444	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe
2804	powershell.exe
1728	powershell.exe
2072	powershell.exe
1100	powershell.exe
464	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe
Token: SeIncreaseQuotaPrivilege	2052	wmic.exe
Token: SeSecurityPrivilege	2052	wmic.exe
Token: SeTakeOwnershipPrivilege	2052	wmic.exe
Token: SeLoadDriverPrivilege	2052	wmic.exe
Token: SeSystemProfilePrivilege	2052	wmic.exe
Token: SeSystemtimePrivilege	2052	wmic.exe
Token: SeProfSingleProcessPrivilege	2052	wmic.exe
Token: SeIncBasePriorityPrivilege	2052	wmic.exe
Token: SeCreatePagefilePrivilege	2052	wmic.exe
Token: SeBackupPrivilege	2052	wmic.exe
Token: SeRestorePrivilege	2052	wmic.exe
Token: SeShutdownPrivilege	2052	wmic.exe
Token: SeDebugPrivilege	2052	wmic.exe
Token: SeSystemEnvironmentPrivilege	2052	wmic.exe
Token: SeRemoteShutdownPrivilege	2052	wmic.exe
Token: SeUndockPrivilege	2052	wmic.exe
Token: SeManageVolumePrivilege	2052	wmic.exe
Token: 33	2052	wmic.exe
Token: 34	2052	wmic.exe
Token: 35	2052	wmic.exe
Token: SeIncreaseQuotaPrivilege	2052	wmic.exe
Token: SeSecurityPrivilege	2052	wmic.exe
Token: SeTakeOwnershipPrivilege	2052	wmic.exe
Token: SeLoadDriverPrivilege	2052	wmic.exe
Token: SeSystemProfilePrivilege	2052	wmic.exe
Token: SeSystemtimePrivilege	2052	wmic.exe
Token: SeProfSingleProcessPrivilege	2052	wmic.exe
Token: SeIncBasePriorityPrivilege	2052	wmic.exe
Token: SeCreatePagefilePrivilege	2052	wmic.exe
Token: SeBackupPrivilege	2052	wmic.exe
Token: SeRestorePrivilege	2052	wmic.exe
Token: SeShutdownPrivilege	2052	wmic.exe
Token: SeDebugPrivilege	2052	wmic.exe
Token: SeSystemEnvironmentPrivilege	2052	wmic.exe
Token: SeRemoteShutdownPrivilege	2052	wmic.exe
Token: SeUndockPrivilege	2052	wmic.exe
Token: SeManageVolumePrivilege	2052	wmic.exe
Token: 33	2052	wmic.exe
Token: 34	2052	wmic.exe
Token: 35	2052	wmic.exe
Token: SeDebugPrivilege	2804	powershell.exe
Token: SeDebugPrivilege	1728	powershell.exe
Token: SeDebugPrivilege	2072	powershell.exe
Token: SeDebugPrivilege	1100	powershell.exe
Token: SeIncreaseQuotaPrivilege	2920	wmic.exe
Token: SeSecurityPrivilege	2920	wmic.exe
Token: SeTakeOwnershipPrivilege	2920	wmic.exe
Token: SeLoadDriverPrivilege	2920	wmic.exe
Token: SeSystemProfilePrivilege	2920	wmic.exe
Token: SeSystemtimePrivilege	2920	wmic.exe
Token: SeProfSingleProcessPrivilege	2920	wmic.exe
Token: SeIncBasePriorityPrivilege	2920	wmic.exe
Token: SeCreatePagefilePrivilege	2920	wmic.exe
Token: SeBackupPrivilege	2920	wmic.exe
Token: SeRestorePrivilege	2920	wmic.exe
Token: SeShutdownPrivilege	2920	wmic.exe
Token: SeDebugPrivilege	2920	wmic.exe
Token: SeSystemEnvironmentPrivilege	2920	wmic.exe
Token: SeRemoteShutdownPrivilege	2920	wmic.exe
Token: SeUndockPrivilege	2920	wmic.exe
Token: SeManageVolumePrivilege	2920	wmic.exe
Token: 33	2920	wmic.exe
Token: 34	2920	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 304 wrote to memory of 2052	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	31
PID 304 wrote to memory of 2052	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	31
PID 304 wrote to memory of 2052	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	31
PID 304 wrote to memory of 2828	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	34
PID 304 wrote to memory of 2828	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	34
PID 304 wrote to memory of 2828	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	34
PID 304 wrote to memory of 2804	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	36
PID 304 wrote to memory of 2804	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	36
PID 304 wrote to memory of 2804	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	36
PID 304 wrote to memory of 1728	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	38
PID 304 wrote to memory of 1728	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	38
PID 304 wrote to memory of 1728	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	38
PID 304 wrote to memory of 2072	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	40
PID 304 wrote to memory of 2072	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	40
PID 304 wrote to memory of 2072	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	40
PID 304 wrote to memory of 1100	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	42
PID 304 wrote to memory of 1100	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	42
PID 304 wrote to memory of 1100	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	42
PID 304 wrote to memory of 2920	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	44
PID 304 wrote to memory of 2920	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	44
PID 304 wrote to memory of 2920	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	44
PID 304 wrote to memory of 3048	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	46
PID 304 wrote to memory of 3048	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	46
PID 304 wrote to memory of 3048	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	46
PID 304 wrote to memory of 1808	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	48
PID 304 wrote to memory of 1808	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	48
PID 304 wrote to memory of 1808	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	48
PID 304 wrote to memory of 464	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	50
PID 304 wrote to memory of 464	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	50
PID 304 wrote to memory of 464	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	50
PID 304 wrote to memory of 3020	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	52
PID 304 wrote to memory of 3020	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	52
PID 304 wrote to memory of 3020	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	52
PID 304 wrote to memory of 2084	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	54
PID 304 wrote to memory of 2084	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	54
PID 304 wrote to memory of 2084	304	df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe	54
PID 2084 wrote to memory of 2444	2084	cmd.exe	56
PID 2084 wrote to memory of 2444	2084	cmd.exe	56
PID 2084 wrote to memory of 2444	2084	cmd.exe	56

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2828	attrib.exe

C:\Users\Admin\AppData\Local\Temp\df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe
"C:\Users\Admin\AppData\Local\Temp\df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:304
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2052
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe"
  2⤵
  - Views/modifies file attributes
  PID:2828
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2804
- 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:1728
- 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:2072
- 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:1100
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3048
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1808
- 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:464
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3020
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\df99537694b2fe9e5732fad10d520af72f26f4654bee5221fb46f1eaeaaf9bcf.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2084
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2444

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
a1d0db2917f1c1418eb2e6930c73dcd3

SHA1
b5ef12489fa02ef51992ff84266b5d15c7df0e06

SHA256
5475f0dacb9a5f1c24c83a2bf653812e5418be6a04cd800d5a4dcafa72f44aec

SHA512
628fbeae71773c369bac9d300cbd298881d71ecf70c2841e6f5910d51ff60d960208dbe215ad048c1230c9a8f3e43bdc771dc7ceeb0c943ab68709c9d7bc8aab

Download Submit
memory/304-0-0x000007FEF5DC3000-0x000007FEF5DC4000-memory.dmp

Filesize
4KB

Download
memory/304-1-0x0000000000D50000-0x0000000000DD0000-memory.dmp

Filesize
512KB

Download
memory/304-2-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/304-48-0x000007FEF5DC0000-0x000007FEF67AC000-memory.dmp

Filesize
9.9MB

Download
memory/464-43-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/464-44-0x0000000002810000-0x0000000002818000-memory.dmp

Filesize
32KB

Download
memory/1728-14-0x000000001B510000-0x000000001B7F2000-memory.dmp

Filesize
2.9MB

Download
memory/1728-15-0x0000000002890000-0x0000000002898000-memory.dmp

Filesize
32KB

Download
memory/2804-7-0x000000001B580000-0x000000001B862000-memory.dmp

Filesize
2.9MB

Download
memory/2804-8-0x0000000002690000-0x0000000002698000-memory.dmp

Filesize
32KB

Download