umbral | ac8a08a5dd79ab90a206fe5f79c6d0982a3d9f21ea23daae9e0a04a0edd65892

Analysis

max time kernel
144s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-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
behavioral2/memory/4880-0-0x000001B3FCF10000-0x000001B3FCF92000-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
4064	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	LegacyPhasmo.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
26	discord.com
28	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4352	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4092	PING.EXE

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
4880	LegacyPhasmo.exe
4064	powershell.exe
4064	powershell.exe
4064	powershell.exe
1052	powershell.exe
1052	powershell.exe
1052	powershell.exe
3536	powershell.exe
3536	powershell.exe
3536	powershell.exe
3240	powershell.exe
3240	powershell.exe
3240	powershell.exe
4252	powershell.exe
4252	powershell.exe
4252	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4880	LegacyPhasmo.exe
Token: SeIncreaseQuotaPrivilege	3212	wmic.exe
Token: SeSecurityPrivilege	3212	wmic.exe
Token: SeTakeOwnershipPrivilege	3212	wmic.exe
Token: SeLoadDriverPrivilege	3212	wmic.exe
Token: SeSystemProfilePrivilege	3212	wmic.exe
Token: SeSystemtimePrivilege	3212	wmic.exe
Token: SeProfSingleProcessPrivilege	3212	wmic.exe
Token: SeIncBasePriorityPrivilege	3212	wmic.exe
Token: SeCreatePagefilePrivilege	3212	wmic.exe
Token: SeBackupPrivilege	3212	wmic.exe
Token: SeRestorePrivilege	3212	wmic.exe
Token: SeShutdownPrivilege	3212	wmic.exe
Token: SeDebugPrivilege	3212	wmic.exe
Token: SeSystemEnvironmentPrivilege	3212	wmic.exe
Token: SeRemoteShutdownPrivilege	3212	wmic.exe
Token: SeUndockPrivilege	3212	wmic.exe
Token: SeManageVolumePrivilege	3212	wmic.exe
Token: 33	3212	wmic.exe
Token: 34	3212	wmic.exe
Token: 35	3212	wmic.exe
Token: 36	3212	wmic.exe
Token: SeIncreaseQuotaPrivilege	3212	wmic.exe
Token: SeSecurityPrivilege	3212	wmic.exe
Token: SeTakeOwnershipPrivilege	3212	wmic.exe
Token: SeLoadDriverPrivilege	3212	wmic.exe
Token: SeSystemProfilePrivilege	3212	wmic.exe
Token: SeSystemtimePrivilege	3212	wmic.exe
Token: SeProfSingleProcessPrivilege	3212	wmic.exe
Token: SeIncBasePriorityPrivilege	3212	wmic.exe
Token: SeCreatePagefilePrivilege	3212	wmic.exe
Token: SeBackupPrivilege	3212	wmic.exe
Token: SeRestorePrivilege	3212	wmic.exe
Token: SeShutdownPrivilege	3212	wmic.exe
Token: SeDebugPrivilege	3212	wmic.exe
Token: SeSystemEnvironmentPrivilege	3212	wmic.exe
Token: SeRemoteShutdownPrivilege	3212	wmic.exe
Token: SeUndockPrivilege	3212	wmic.exe
Token: SeManageVolumePrivilege	3212	wmic.exe
Token: 33	3212	wmic.exe
Token: 34	3212	wmic.exe
Token: 35	3212	wmic.exe
Token: 36	3212	wmic.exe
Token: SeDebugPrivilege	4064	powershell.exe
Token: SeDebugPrivilege	1052	powershell.exe
Token: SeDebugPrivilege	3536	powershell.exe
Token: SeDebugPrivilege	3240	powershell.exe
Token: SeIncreaseQuotaPrivilege	1268	wmic.exe
Token: SeSecurityPrivilege	1268	wmic.exe
Token: SeTakeOwnershipPrivilege	1268	wmic.exe
Token: SeLoadDriverPrivilege	1268	wmic.exe
Token: SeSystemProfilePrivilege	1268	wmic.exe
Token: SeSystemtimePrivilege	1268	wmic.exe
Token: SeProfSingleProcessPrivilege	1268	wmic.exe
Token: SeIncBasePriorityPrivilege	1268	wmic.exe
Token: SeCreatePagefilePrivilege	1268	wmic.exe
Token: SeBackupPrivilege	1268	wmic.exe
Token: SeRestorePrivilege	1268	wmic.exe
Token: SeShutdownPrivilege	1268	wmic.exe
Token: SeDebugPrivilege	1268	wmic.exe
Token: SeSystemEnvironmentPrivilege	1268	wmic.exe
Token: SeRemoteShutdownPrivilege	1268	wmic.exe
Token: SeUndockPrivilege	1268	wmic.exe
Token: SeManageVolumePrivilege	1268	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4880 wrote to memory of 3212	4880	LegacyPhasmo.exe	91
PID 4880 wrote to memory of 3212	4880	LegacyPhasmo.exe	91
PID 4880 wrote to memory of 2780	4880	LegacyPhasmo.exe	95
PID 4880 wrote to memory of 2780	4880	LegacyPhasmo.exe	95
PID 4880 wrote to memory of 4064	4880	LegacyPhasmo.exe	97
PID 4880 wrote to memory of 4064	4880	LegacyPhasmo.exe	97
PID 4880 wrote to memory of 1052	4880	LegacyPhasmo.exe	101
PID 4880 wrote to memory of 1052	4880	LegacyPhasmo.exe	101
PID 4880 wrote to memory of 3536	4880	LegacyPhasmo.exe	105
PID 4880 wrote to memory of 3536	4880	LegacyPhasmo.exe	105
PID 4880 wrote to memory of 3240	4880	LegacyPhasmo.exe	107
PID 4880 wrote to memory of 3240	4880	LegacyPhasmo.exe	107
PID 4880 wrote to memory of 1268	4880	LegacyPhasmo.exe	110
PID 4880 wrote to memory of 1268	4880	LegacyPhasmo.exe	110
PID 4880 wrote to memory of 4268	4880	LegacyPhasmo.exe	112
PID 4880 wrote to memory of 4268	4880	LegacyPhasmo.exe	112
PID 4880 wrote to memory of 2464	4880	LegacyPhasmo.exe	114
PID 4880 wrote to memory of 2464	4880	LegacyPhasmo.exe	114
PID 4880 wrote to memory of 4252	4880	LegacyPhasmo.exe	116
PID 4880 wrote to memory of 4252	4880	LegacyPhasmo.exe	116
PID 4880 wrote to memory of 4352	4880	LegacyPhasmo.exe	119
PID 4880 wrote to memory of 4352	4880	LegacyPhasmo.exe	119
PID 4880 wrote to memory of 2956	4880	LegacyPhasmo.exe	123
PID 4880 wrote to memory of 2956	4880	LegacyPhasmo.exe	123
PID 2956 wrote to memory of 4092	2956	cmd.exe	125
PID 2956 wrote to memory of 4092	2956	cmd.exe	125

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2780	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:4880
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3212
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\LegacyPhasmo\LegacyPhasmo.exe"
  2⤵
  - Views/modifies file attributes
  PID:2780
- 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:4064
- 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:1052
- 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:3536
- 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:3240
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1268
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4268
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2464
- 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:4252
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4352
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:2956
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4092

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4088,i,5711962389779687290,1245653010537220991,262144 --variations-seed-version --mojo-platform-channel-handle=4108 /prefetch:8
1⤵
PID:4160

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\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2979eabc783eaca50de7be23dd4eafcf

SHA1
d709ce5f3a06b7958a67e20870bfd95b83cad2ea

SHA256
006cca90e78fbb571532a83082ac6712721a34ea4b21f490058ffb3f521f4903

SHA512
92bc433990572d9427d0c93eef9bd1cc23fa00ed60dd0c9c983d87d3421e02ce3f156c6f88fe916ef6782dbf185cbce083bc0094f8c527f302be6a37d1c53aba

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
ad131c8b53093f1b673385910693d7a3

SHA1
d1948974be7bdbf63f85c132ce81f7e4a71ede2f

SHA256
63b31d22e538288f6adcd34311b222a9e77c668093f12146d0c2d078698c4376

SHA512
9e0682979b727dacc054df93a1eb7c26210d9cf6ab79b85cc2e4bf91d92ada282499ef2a3df82ef3408f1ed1e0ad71a70f0086e4d6cfb4b2c50d015085ad1813

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
82b8238e742ea60ccfd8de8f9641ee75

SHA1
82442dc3909743c6da5ba2ddbb8b466de933915a

SHA256
8e5a14b70ae648735499c2fd443e8541c0f1d652d35bc877d12b33f12ab6e7b8

SHA512
2896e0744c2349053f2af959d50d1c7d6dbb42a9b5845a5a571098661998f53c6540bd3179fd817268b46501e62854a3bc80d2a2078c128e72ce18f1f95b7317

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rgzv1qdf.xjx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4064-4-0x00007FFC06940000-0x00007FFC07401000-memory.dmp

Filesize
10.8MB

Download
memory/4064-5-0x00000279DCC50000-0x00000279DCC72000-memory.dmp

Filesize
136KB

Download
memory/4064-15-0x00007FFC06940000-0x00007FFC07401000-memory.dmp

Filesize
10.8MB

Download
memory/4064-18-0x00007FFC06940000-0x00007FFC07401000-memory.dmp

Filesize
10.8MB

Download
memory/4064-3-0x00007FFC06940000-0x00007FFC07401000-memory.dmp

Filesize
10.8MB

Download
memory/4880-34-0x000001B3FF760000-0x000001B3FF7B0000-memory.dmp

Filesize
320KB

Download
memory/4880-33-0x000001B3FF6E0000-0x000001B3FF756000-memory.dmp

Filesize
472KB

Download
memory/4880-35-0x000001B3FF4D0000-0x000001B3FF4EE000-memory.dmp

Filesize
120KB

Download
memory/4880-1-0x00007FFC06943000-0x00007FFC06945000-memory.dmp

Filesize
8KB

Download
memory/4880-0-0x000001B3FCF10000-0x000001B3FCF92000-memory.dmp

Filesize
520KB

Download
memory/4880-68-0x000001B3FF4F0000-0x000001B3FF4FA000-memory.dmp

Filesize
40KB

Download
memory/4880-69-0x000001B3FF680000-0x000001B3FF692000-memory.dmp

Filesize
72KB

Download
memory/4880-2-0x00007FFC06940000-0x00007FFC07401000-memory.dmp

Filesize
10.8MB

Download
memory/4880-87-0x00007FFC06940000-0x00007FFC07401000-memory.dmp

Filesize
10.8MB

Download