umbral | 60250d1395011fa3fafae608a46d70882fc4e1ad13b7146eed27d49344edb554

Analysis

max time kernel
1696s
max time network
1668s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
19/04/2024, 20:32

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General

Target
C11Bootstrapper/Properties/GuiLoader.exe
Size 246KB
Sample240419-za94caeg77
SHA256 f61483bd59316dff21d5bc3fc8f32811dd8ddca826a84255ab5ea2cdfef3d7ae
MD5 1bb249792e56063762f5adb2d94fc8c9
SHA1 9a1fa4886ed023f864c06345b639a121f6359cd1
SHA512 d8a2af35713bf4ce979440375c460b9f7b3f2849abc9cdf0d2fdb5e891a5bab36ed101da94f6b57d3dc775c3a0fdeffbaeab8981965ec72fe56adfa5dab501ba
SSDEEP 6144:RloZM+rIkd8g+EtXHkv/iD4kgOZGCg/7I7R0STTKvYb8e1mZzi:joZtL+EP8kgOZGCg/7I7R0STTKIX
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4236-0-0x00000191D2FF0000-0x00000191D3034000-memory.dmp	family_umbral

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

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	GuiLoader.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
3	discord.com
6	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
3	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4468	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3728	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4236	GuiLoader.exe
3424	powershell.exe
3424	powershell.exe
2400	powershell.exe
2400	powershell.exe
2676	powershell.exe
2676	powershell.exe
4792	powershell.exe
4792	powershell.exe
4180	powershell.exe
4180	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4236	GuiLoader.exe
Token: SeIncreaseQuotaPrivilege	1976	wmic.exe
Token: SeSecurityPrivilege	1976	wmic.exe
Token: SeTakeOwnershipPrivilege	1976	wmic.exe
Token: SeLoadDriverPrivilege	1976	wmic.exe
Token: SeSystemProfilePrivilege	1976	wmic.exe
Token: SeSystemtimePrivilege	1976	wmic.exe
Token: SeProfSingleProcessPrivilege	1976	wmic.exe
Token: SeIncBasePriorityPrivilege	1976	wmic.exe
Token: SeCreatePagefilePrivilege	1976	wmic.exe
Token: SeBackupPrivilege	1976	wmic.exe
Token: SeRestorePrivilege	1976	wmic.exe
Token: SeShutdownPrivilege	1976	wmic.exe
Token: SeDebugPrivilege	1976	wmic.exe
Token: SeSystemEnvironmentPrivilege	1976	wmic.exe
Token: SeRemoteShutdownPrivilege	1976	wmic.exe
Token: SeUndockPrivilege	1976	wmic.exe
Token: SeManageVolumePrivilege	1976	wmic.exe
Token: 33	1976	wmic.exe
Token: 34	1976	wmic.exe
Token: 35	1976	wmic.exe
Token: 36	1976	wmic.exe
Token: SeIncreaseQuotaPrivilege	1976	wmic.exe
Token: SeSecurityPrivilege	1976	wmic.exe
Token: SeTakeOwnershipPrivilege	1976	wmic.exe
Token: SeLoadDriverPrivilege	1976	wmic.exe
Token: SeSystemProfilePrivilege	1976	wmic.exe
Token: SeSystemtimePrivilege	1976	wmic.exe
Token: SeProfSingleProcessPrivilege	1976	wmic.exe
Token: SeIncBasePriorityPrivilege	1976	wmic.exe
Token: SeCreatePagefilePrivilege	1976	wmic.exe
Token: SeBackupPrivilege	1976	wmic.exe
Token: SeRestorePrivilege	1976	wmic.exe
Token: SeShutdownPrivilege	1976	wmic.exe
Token: SeDebugPrivilege	1976	wmic.exe
Token: SeSystemEnvironmentPrivilege	1976	wmic.exe
Token: SeRemoteShutdownPrivilege	1976	wmic.exe
Token: SeUndockPrivilege	1976	wmic.exe
Token: SeManageVolumePrivilege	1976	wmic.exe
Token: 33	1976	wmic.exe
Token: 34	1976	wmic.exe
Token: 35	1976	wmic.exe
Token: 36	1976	wmic.exe
Token: SeDebugPrivilege	3424	powershell.exe
Token: SeDebugPrivilege	2400	powershell.exe
Token: SeDebugPrivilege	2676	powershell.exe
Token: SeDebugPrivilege	4792	powershell.exe
Token: SeIncreaseQuotaPrivilege	2820	wmic.exe
Token: SeSecurityPrivilege	2820	wmic.exe
Token: SeTakeOwnershipPrivilege	2820	wmic.exe
Token: SeLoadDriverPrivilege	2820	wmic.exe
Token: SeSystemProfilePrivilege	2820	wmic.exe
Token: SeSystemtimePrivilege	2820	wmic.exe
Token: SeProfSingleProcessPrivilege	2820	wmic.exe
Token: SeIncBasePriorityPrivilege	2820	wmic.exe
Token: SeCreatePagefilePrivilege	2820	wmic.exe
Token: SeBackupPrivilege	2820	wmic.exe
Token: SeRestorePrivilege	2820	wmic.exe
Token: SeShutdownPrivilege	2820	wmic.exe
Token: SeDebugPrivilege	2820	wmic.exe
Token: SeSystemEnvironmentPrivilege	2820	wmic.exe
Token: SeRemoteShutdownPrivilege	2820	wmic.exe
Token: SeUndockPrivilege	2820	wmic.exe
Token: SeManageVolumePrivilege	2820	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4236 wrote to memory of 1976	4236	GuiLoader.exe	78
PID 4236 wrote to memory of 1976	4236	GuiLoader.exe	78
PID 4236 wrote to memory of 4784	4236	GuiLoader.exe	81
PID 4236 wrote to memory of 4784	4236	GuiLoader.exe	81
PID 4236 wrote to memory of 3424	4236	GuiLoader.exe	83
PID 4236 wrote to memory of 3424	4236	GuiLoader.exe	83
PID 4236 wrote to memory of 2400	4236	GuiLoader.exe	85
PID 4236 wrote to memory of 2400	4236	GuiLoader.exe	85
PID 4236 wrote to memory of 2676	4236	GuiLoader.exe	87
PID 4236 wrote to memory of 2676	4236	GuiLoader.exe	87
PID 4236 wrote to memory of 4792	4236	GuiLoader.exe	89
PID 4236 wrote to memory of 4792	4236	GuiLoader.exe	89
PID 4236 wrote to memory of 2820	4236	GuiLoader.exe	91
PID 4236 wrote to memory of 2820	4236	GuiLoader.exe	91
PID 4236 wrote to memory of 4652	4236	GuiLoader.exe	93
PID 4236 wrote to memory of 4652	4236	GuiLoader.exe	93
PID 4236 wrote to memory of 2656	4236	GuiLoader.exe	95
PID 4236 wrote to memory of 2656	4236	GuiLoader.exe	95
PID 4236 wrote to memory of 4180	4236	GuiLoader.exe	97
PID 4236 wrote to memory of 4180	4236	GuiLoader.exe	97
PID 4236 wrote to memory of 4468	4236	GuiLoader.exe	99
PID 4236 wrote to memory of 4468	4236	GuiLoader.exe	99
PID 4236 wrote to memory of 3528	4236	GuiLoader.exe	101
PID 4236 wrote to memory of 3528	4236	GuiLoader.exe	101
PID 3528 wrote to memory of 3728	3528	cmd.exe	103
PID 3528 wrote to memory of 3728	3528	cmd.exe	103

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4784	attrib.exe

C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe
"C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4236
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1976
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"
  2⤵
  - Views/modifies file attributes
  PID:4784
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3424
- 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:2400
- 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:2676
- 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:4792
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2820
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2656
- 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:4180
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4468
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3528
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:3728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 e6b6223094e8fc598ad12b3849e49f03a141ccd21e0eaa336f81791ad8443eca
MD5 5ba388a6597d5e09191c2c88d2fdf598
SHA1 13516f8ec5a99298f6952438055c39330feae5d8
SHA512 ead2a2b5a1c2fad70c1cf570b2c9bfcb7364dd9f257a834eb819e55b8fee78e3f191f93044f07d51c259ca77a90ee8530f9204cbae080fba1d5705e1209f5b19
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864
MD5 2e8eb51096d6f6781456fef7df731d97
SHA1 ec2aaf851a618fb43c3d040a13a71997c25bda43
SHA512 0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 948B
SHA256 9c4ea380965b6239151beaa1d605ff20255b3691968352fc8a3b8b7634a41b1d
MD5 83bc7bafe464042aba6a1d1d98a1489f
SHA1 8268233d7442b842b858a1ef0831b5998bd3df40
SHA512 a38d64bbe657adaf9991240d46fda9268a3e1a322366847899bb6347de1d3cd66dabead78792f65dad68253147415f2ad44904eab1589368cf8d2140bdd1dfd0
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 5bfd4968395fefaac3941c08fa11e86dfde1072137d9290aee3888f2a5d92d3f
MD5 f29ff8b1e0f396a194a6782749830b8e
SHA1 2f8999b0eb2a20e591cf9a638c9fa84ddf4a1f69
SHA512 0689d665f2a7c9007c5dc4c14a53d5566d315d05d476bee82d64d02d40e3ffddca2b36419c76a8f7b7979958a62a7a93c939d1ed72fa7a844841ed06741b9e19
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 e6cbc21e42e21db1d8cf2b9333af227772bd94be3611e5e689a578eb4ad19d46
MD5 9402c815c24778d14ceb8f13bff17188
SHA1 73fe123e5546ab00211dd0a0eed5a639c9bf60bf
SHA512 a5ce6180e902c2f486c2f1c334ed47bf9f77c569a00279447b20fa5fb6b0f0b4d55dbf82e0e81ac1c8e2d2a9dbedb65dbdfbb4006f500373371f14df37d2ac9c
MD5 SHA1 SHA512

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__PSScriptPolicyTest_qxiypjd1.ffi.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qxiypjd1.ffi.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2400-21-0x000001E175640000-0x000001E175650000-memory.dmp

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memory/2400-33-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/2400-31-0x000001E175640000-0x000001E175650000-memory.dmp

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memory/2400-19-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/2400-20-0x000001E175640000-0x000001E175650000-memory.dmp

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memory/2676-66-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/2676-56-0x0000016BDF770000-0x0000016BDF780000-memory.dmp

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memory/2676-50-0x0000016BDF770000-0x0000016BDF780000-memory.dmp

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memory/2676-49-0x0000016BDF770000-0x0000016BDF780000-memory.dmp

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memory/2676-40-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/3424-17-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/3424-12-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/3424-14-0x0000025378E90000-0x0000025378EA0000-memory.dmp

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memory/3424-13-0x0000025378E90000-0x0000025378EA0000-memory.dmp

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memory/3424-11-0x0000025378E00000-0x0000025378E22000-memory.dmp

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memory/4180-95-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/4180-96-0x0000020569A20000-0x0000020569A30000-memory.dmp

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memory/4180-98-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/4236-38-0x00000191D4E10000-0x00000191D4E2E000-memory.dmp

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memory/4236-83-0x00000191ED810000-0x00000191ED822000-memory.dmp

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memory/4236-103-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/4236-1-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/4236-0-0x00000191D2FF0000-0x00000191D3034000-memory.dmp

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memory/4236-2-0x00000191ED700000-0x00000191ED710000-memory.dmp

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memory/4236-36-0x00000191ED890000-0x00000191ED906000-memory.dmp

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memory/4236-39-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/4236-82-0x00000191D4E60000-0x00000191D4E6A000-memory.dmp

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memory/4236-37-0x00000191ED6B0000-0x00000191ED700000-memory.dmp

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memory/4792-80-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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memory/4792-78-0x000001BEA7730000-0x000001BEA7740000-memory.dmp

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memory/4792-68-0x000001BEA7730000-0x000001BEA7740000-memory.dmp

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memory/4792-67-0x00007FFB887B0000-0x00007FFB89272000-memory.dmp

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