umbral | ac8a08a5dd79ab90a206fe5f79c6d0982a3d9f21ea23daae9e0a04a0edd65892

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
18-05-2024 00:06

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General

Target

LegacyPhasmo/LegacyPhasmo.exe
Size

495KB
MD5

85946e8adc17bed93bb80005f2caabe7
SHA1

b7941993fc3c58a9a42296b82e43f0988feb2ed9
SHA256

649683f80b00b62ba0979634a6935088637e8b12f91ef8260dfaafa4840d6555
SHA512

331cc3635905ff7673f545c7570cbaae1fa7a7b5637a610d1ce801929d67b527e88cb1e453aa4b1c402ea2565e0e5fa6729d822d38527a6bd8f8e84348c6e51c
SSDEEP

6144:vloZM+rIkd8g+EtXHkv/iD42LM3t74sziKrd4UB8Fb8e1mgi04OA:NoZtL+EP82LM3t74sziKrd4UBsa00

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1708-1-0x00000000008A0000-0x0000000000922000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2612	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
1196	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
7	discord.com
8	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
572	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1756	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1708	LegacyPhasmo.exe
2612	powershell.exe
2624	powershell.exe
2540	powershell.exe
2792	powershell.exe
624	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1708	LegacyPhasmo.exe
Token: SeIncreaseQuotaPrivilege	2580	wmic.exe
Token: SeSecurityPrivilege	2580	wmic.exe
Token: SeTakeOwnershipPrivilege	2580	wmic.exe
Token: SeLoadDriverPrivilege	2580	wmic.exe
Token: SeSystemProfilePrivilege	2580	wmic.exe
Token: SeSystemtimePrivilege	2580	wmic.exe
Token: SeProfSingleProcessPrivilege	2580	wmic.exe
Token: SeIncBasePriorityPrivilege	2580	wmic.exe
Token: SeCreatePagefilePrivilege	2580	wmic.exe
Token: SeBackupPrivilege	2580	wmic.exe
Token: SeRestorePrivilege	2580	wmic.exe
Token: SeShutdownPrivilege	2580	wmic.exe
Token: SeDebugPrivilege	2580	wmic.exe
Token: SeSystemEnvironmentPrivilege	2580	wmic.exe
Token: SeRemoteShutdownPrivilege	2580	wmic.exe
Token: SeUndockPrivilege	2580	wmic.exe
Token: SeManageVolumePrivilege	2580	wmic.exe
Token: 33	2580	wmic.exe
Token: 34	2580	wmic.exe
Token: 35	2580	wmic.exe
Token: SeIncreaseQuotaPrivilege	2580	wmic.exe
Token: SeSecurityPrivilege	2580	wmic.exe
Token: SeTakeOwnershipPrivilege	2580	wmic.exe
Token: SeLoadDriverPrivilege	2580	wmic.exe
Token: SeSystemProfilePrivilege	2580	wmic.exe
Token: SeSystemtimePrivilege	2580	wmic.exe
Token: SeProfSingleProcessPrivilege	2580	wmic.exe
Token: SeIncBasePriorityPrivilege	2580	wmic.exe
Token: SeCreatePagefilePrivilege	2580	wmic.exe
Token: SeBackupPrivilege	2580	wmic.exe
Token: SeRestorePrivilege	2580	wmic.exe
Token: SeShutdownPrivilege	2580	wmic.exe
Token: SeDebugPrivilege	2580	wmic.exe
Token: SeSystemEnvironmentPrivilege	2580	wmic.exe
Token: SeRemoteShutdownPrivilege	2580	wmic.exe
Token: SeUndockPrivilege	2580	wmic.exe
Token: SeManageVolumePrivilege	2580	wmic.exe
Token: 33	2580	wmic.exe
Token: 34	2580	wmic.exe
Token: 35	2580	wmic.exe
Token: SeDebugPrivilege	2612	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	2540	powershell.exe
Token: SeDebugPrivilege	2792	powershell.exe
Token: SeIncreaseQuotaPrivilege	2384	wmic.exe
Token: SeSecurityPrivilege	2384	wmic.exe
Token: SeTakeOwnershipPrivilege	2384	wmic.exe
Token: SeLoadDriverPrivilege	2384	wmic.exe
Token: SeSystemProfilePrivilege	2384	wmic.exe
Token: SeSystemtimePrivilege	2384	wmic.exe
Token: SeProfSingleProcessPrivilege	2384	wmic.exe
Token: SeIncBasePriorityPrivilege	2384	wmic.exe
Token: SeCreatePagefilePrivilege	2384	wmic.exe
Token: SeBackupPrivilege	2384	wmic.exe
Token: SeRestorePrivilege	2384	wmic.exe
Token: SeShutdownPrivilege	2384	wmic.exe
Token: SeDebugPrivilege	2384	wmic.exe
Token: SeSystemEnvironmentPrivilege	2384	wmic.exe
Token: SeRemoteShutdownPrivilege	2384	wmic.exe
Token: SeUndockPrivilege	2384	wmic.exe
Token: SeManageVolumePrivilege	2384	wmic.exe
Token: 33	2384	wmic.exe
Token: 34	2384	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1708 wrote to memory of 2580	1708	LegacyPhasmo.exe	28
PID 1708 wrote to memory of 2580	1708	LegacyPhasmo.exe	28
PID 1708 wrote to memory of 2580	1708	LegacyPhasmo.exe	28
PID 1708 wrote to memory of 2688	1708	LegacyPhasmo.exe	31
PID 1708 wrote to memory of 2688	1708	LegacyPhasmo.exe	31
PID 1708 wrote to memory of 2688	1708	LegacyPhasmo.exe	31
PID 1708 wrote to memory of 2612	1708	LegacyPhasmo.exe	33
PID 1708 wrote to memory of 2612	1708	LegacyPhasmo.exe	33
PID 1708 wrote to memory of 2612	1708	LegacyPhasmo.exe	33
PID 1708 wrote to memory of 2624	1708	LegacyPhasmo.exe	35
PID 1708 wrote to memory of 2624	1708	LegacyPhasmo.exe	35
PID 1708 wrote to memory of 2624	1708	LegacyPhasmo.exe	35
PID 1708 wrote to memory of 2540	1708	LegacyPhasmo.exe	37
PID 1708 wrote to memory of 2540	1708	LegacyPhasmo.exe	37
PID 1708 wrote to memory of 2540	1708	LegacyPhasmo.exe	37
PID 1708 wrote to memory of 2792	1708	LegacyPhasmo.exe	39
PID 1708 wrote to memory of 2792	1708	LegacyPhasmo.exe	39
PID 1708 wrote to memory of 2792	1708	LegacyPhasmo.exe	39
PID 1708 wrote to memory of 2384	1708	LegacyPhasmo.exe	41
PID 1708 wrote to memory of 2384	1708	LegacyPhasmo.exe	41
PID 1708 wrote to memory of 2384	1708	LegacyPhasmo.exe	41
PID 1708 wrote to memory of 1628	1708	LegacyPhasmo.exe	43
PID 1708 wrote to memory of 1628	1708	LegacyPhasmo.exe	43
PID 1708 wrote to memory of 1628	1708	LegacyPhasmo.exe	43
PID 1708 wrote to memory of 1588	1708	LegacyPhasmo.exe	45
PID 1708 wrote to memory of 1588	1708	LegacyPhasmo.exe	45
PID 1708 wrote to memory of 1588	1708	LegacyPhasmo.exe	45
PID 1708 wrote to memory of 624	1708	LegacyPhasmo.exe	47
PID 1708 wrote to memory of 624	1708	LegacyPhasmo.exe	47
PID 1708 wrote to memory of 624	1708	LegacyPhasmo.exe	47
PID 1708 wrote to memory of 572	1708	LegacyPhasmo.exe	49
PID 1708 wrote to memory of 572	1708	LegacyPhasmo.exe	49
PID 1708 wrote to memory of 572	1708	LegacyPhasmo.exe	49
PID 1708 wrote to memory of 1196	1708	LegacyPhasmo.exe	51
PID 1708 wrote to memory of 1196	1708	LegacyPhasmo.exe	51
PID 1708 wrote to memory of 1196	1708	LegacyPhasmo.exe	51
PID 1196 wrote to memory of 1756	1196	cmd.exe	53
PID 1196 wrote to memory of 1756	1196	cmd.exe	53
PID 1196 wrote to memory of 1756	1196	cmd.exe	53

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2688	attrib.exe

C:\Users\Admin\AppData\Local\Temp\LegacyPhasmo\LegacyPhasmo.exe
"C:\Users\Admin\AppData\Local\Temp\LegacyPhasmo\LegacyPhasmo.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2580
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\LegacyPhasmo\LegacyPhasmo.exe"
  2⤵
  - Views/modifies file attributes
  PID:2688
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\LegacyPhasmo\LegacyPhasmo.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2612
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2540
- 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:2792
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2384
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1628
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1588
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:624
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:572
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\LegacyPhasmo\LegacyPhasmo.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1196
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1756

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

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
717ed8f69f2cc79656a632e3f2eaf301

SHA1
6ebc7eb2bc9f2099a5343d0039b35266c066e82c

SHA256
a142021c1aefefe81d2b1e2031764ae4129f9b8129ef7a3af95d3f89fe53966c

SHA512
04d094b9555c6e92ac63c769a8a8dedecb25e3b3e11f84464213b962b812d88575639f7358b7b54f355f13f97f67a82e54e2f4393748bf94537c4d8f9091c88e

Download Submit
memory/624-43-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/1708-0-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

Filesize
4KB

Download
memory/1708-1-0x00000000008A0000-0x0000000000922000-memory.dmp

Filesize
520KB

Download
memory/1708-2-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/1708-47-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2612-7-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2612-8-0x0000000001FF0000-0x0000000001FF8000-memory.dmp

Filesize
32KB

Download
memory/2624-14-0x000000001B7A0000-0x000000001BA82000-memory.dmp

Filesize
2.9MB

Download
memory/2624-15-0x0000000001E10000-0x0000000001E18000-memory.dmp

Filesize
32KB

Download