umbral | 1ce288b4eace5690b66c6681e77f4f75d1c5fda07eab5a410ffe38271d515909

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05-06-2024 16:12

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General

Target

FIXER-2.3.exe
Size

678KB
MD5

c4a81b5b47dab29d88805f75c95035a0
SHA1

092fcb36a736198e19530c96991d9bcb0354fa75
SHA256

1ce288b4eace5690b66c6681e77f4f75d1c5fda07eab5a410ffe38271d515909
SHA512

eb98f91df470f6f52ad8db2d44da3a090b63d4067e371ca8df1b5e54e7623123d6ba7df779b27cf6298d7778b415e9569f29c62ef6276f8d666134ff4aa7006e
SSDEEP

6144:u4zMHU2N3RSUDqnopqonzuv4NIAyxuQiOfFs3OJ18xNz+KgbqUypit:u44RuS78onzuv4NIAAuQkOzu

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000500000002328f-4.dat	family_umbral
behavioral2/memory/4496-13-0x000002E465570000-0x000002E4655B0000-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
4880	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	FIXER-2.3.exe

Executes dropped EXE 1 IoCs

pid	Process
4496	Umbral.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

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

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2188	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4496	Umbral.exe
4880	powershell.exe
4880	powershell.exe
2436	powershell.exe
2436	powershell.exe
860	powershell.exe
860	powershell.exe
1484	powershell.exe
1484	powershell.exe
3724	powershell.exe
3724	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4496	Umbral.exe
Token: SeIncreaseQuotaPrivilege	2984	wmic.exe
Token: SeSecurityPrivilege	2984	wmic.exe
Token: SeTakeOwnershipPrivilege	2984	wmic.exe
Token: SeLoadDriverPrivilege	2984	wmic.exe
Token: SeSystemProfilePrivilege	2984	wmic.exe
Token: SeSystemtimePrivilege	2984	wmic.exe
Token: SeProfSingleProcessPrivilege	2984	wmic.exe
Token: SeIncBasePriorityPrivilege	2984	wmic.exe
Token: SeCreatePagefilePrivilege	2984	wmic.exe
Token: SeBackupPrivilege	2984	wmic.exe
Token: SeRestorePrivilege	2984	wmic.exe
Token: SeShutdownPrivilege	2984	wmic.exe
Token: SeDebugPrivilege	2984	wmic.exe
Token: SeSystemEnvironmentPrivilege	2984	wmic.exe
Token: SeRemoteShutdownPrivilege	2984	wmic.exe
Token: SeUndockPrivilege	2984	wmic.exe
Token: SeManageVolumePrivilege	2984	wmic.exe
Token: 33	2984	wmic.exe
Token: 34	2984	wmic.exe
Token: 35	2984	wmic.exe
Token: 36	2984	wmic.exe
Token: SeIncreaseQuotaPrivilege	2984	wmic.exe
Token: SeSecurityPrivilege	2984	wmic.exe
Token: SeTakeOwnershipPrivilege	2984	wmic.exe
Token: SeLoadDriverPrivilege	2984	wmic.exe
Token: SeSystemProfilePrivilege	2984	wmic.exe
Token: SeSystemtimePrivilege	2984	wmic.exe
Token: SeProfSingleProcessPrivilege	2984	wmic.exe
Token: SeIncBasePriorityPrivilege	2984	wmic.exe
Token: SeCreatePagefilePrivilege	2984	wmic.exe
Token: SeBackupPrivilege	2984	wmic.exe
Token: SeRestorePrivilege	2984	wmic.exe
Token: SeShutdownPrivilege	2984	wmic.exe
Token: SeDebugPrivilege	2984	wmic.exe
Token: SeSystemEnvironmentPrivilege	2984	wmic.exe
Token: SeRemoteShutdownPrivilege	2984	wmic.exe
Token: SeUndockPrivilege	2984	wmic.exe
Token: SeManageVolumePrivilege	2984	wmic.exe
Token: 33	2984	wmic.exe
Token: 34	2984	wmic.exe
Token: 35	2984	wmic.exe
Token: 36	2984	wmic.exe
Token: SeDebugPrivilege	4880	powershell.exe
Token: SeDebugPrivilege	2436	powershell.exe
Token: SeDebugPrivilege	860	powershell.exe
Token: SeDebugPrivilege	1484	powershell.exe
Token: SeIncreaseQuotaPrivilege	4024	wmic.exe
Token: SeSecurityPrivilege	4024	wmic.exe
Token: SeTakeOwnershipPrivilege	4024	wmic.exe
Token: SeLoadDriverPrivilege	4024	wmic.exe
Token: SeSystemProfilePrivilege	4024	wmic.exe
Token: SeSystemtimePrivilege	4024	wmic.exe
Token: SeProfSingleProcessPrivilege	4024	wmic.exe
Token: SeIncBasePriorityPrivilege	4024	wmic.exe
Token: SeCreatePagefilePrivilege	4024	wmic.exe
Token: SeBackupPrivilege	4024	wmic.exe
Token: SeRestorePrivilege	4024	wmic.exe
Token: SeShutdownPrivilege	4024	wmic.exe
Token: SeDebugPrivilege	4024	wmic.exe
Token: SeSystemEnvironmentPrivilege	4024	wmic.exe
Token: SeRemoteShutdownPrivilege	4024	wmic.exe
Token: SeUndockPrivilege	4024	wmic.exe
Token: SeManageVolumePrivilege	4024	wmic.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2472 wrote to memory of 4496	2472	FIXER-2.3.exe	83
PID 2472 wrote to memory of 4496	2472	FIXER-2.3.exe	83
PID 2472 wrote to memory of 4536	2472	FIXER-2.3.exe	84
PID 2472 wrote to memory of 4536	2472	FIXER-2.3.exe	84
PID 2472 wrote to memory of 4536	2472	FIXER-2.3.exe	84
PID 4496 wrote to memory of 2984	4496	Umbral.exe	86
PID 4496 wrote to memory of 2984	4496	Umbral.exe	86
PID 4496 wrote to memory of 4880	4496	Umbral.exe	89
PID 4496 wrote to memory of 4880	4496	Umbral.exe	89
PID 4496 wrote to memory of 2436	4496	Umbral.exe	91
PID 4496 wrote to memory of 2436	4496	Umbral.exe	91
PID 4496 wrote to memory of 860	4496	Umbral.exe	93
PID 4496 wrote to memory of 860	4496	Umbral.exe	93
PID 4496 wrote to memory of 1484	4496	Umbral.exe	95
PID 4496 wrote to memory of 1484	4496	Umbral.exe	95
PID 4496 wrote to memory of 4024	4496	Umbral.exe	98
PID 4496 wrote to memory of 4024	4496	Umbral.exe	98
PID 4496 wrote to memory of 3512	4496	Umbral.exe	100
PID 4496 wrote to memory of 3512	4496	Umbral.exe	100
PID 4496 wrote to memory of 4392	4496	Umbral.exe	102
PID 4496 wrote to memory of 4392	4496	Umbral.exe	102
PID 4496 wrote to memory of 3724	4496	Umbral.exe	104
PID 4496 wrote to memory of 3724	4496	Umbral.exe	104
PID 4496 wrote to memory of 2188	4496	Umbral.exe	106
PID 4496 wrote to memory of 2188	4496	Umbral.exe	106

C:\Users\Admin\AppData\Local\Temp\FIXER-2.3.exe
"C:\Users\Admin\AppData\Local\Temp\FIXER-2.3.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2472
- C:\Users\Admin\AppData\Local\Temp\Umbral.exe
  "C:\Users\Admin\AppData\Local\Temp\Umbral.exe"
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4496
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2984
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Umbral.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4880
- - 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
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2436
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:860
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1484
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4024
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:3512
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:4392
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3724
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:2188
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\bum.bat" "
  2⤵
  PID:4536

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

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
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

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

Filesize
948B

MD5
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\Umbral.exe

Filesize
231KB

MD5
4726eb272b00df9ffd0274d16aa7c8ae

SHA1
a3c98c19fd956d61f32e0fe214f855e4ac810904

SHA256
7b5df9094a3d6133b309f01585bb2391b4e5e4c7d91737e25399e73053b219ad

SHA512
bd8acb0ab507ac015cb213ec5baed52f60b7144c25e5b32828e8406a7a7264a708708a6149e09e80d83664eadda7381a440305e607c6511e101b51da2f2a110b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n2xatqfj.4md.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\bum.bat

Filesize
442KB

MD5
12e75cc92bd7f9350f40745437a75e0f

SHA1
4deead6e14afc6df1afd88e91fd7caa1acf37294

SHA256
0f8ebc8ff32f92408a8d383cceb1e1bc2dc0f0dfe1cffbfe808d82303c98f759

SHA512
c43fdde607adaea7f2d8949dac5db7143553f8ef498f2801180c7cdcd31353dcd80af42ce65677305432bf8e5a59bf0f728b9cb4a69a14bca0e529342f03070d

Download Submit
memory/4496-44-0x000002E47FD00000-0x000002E47FD76000-memory.dmp

Filesize
472KB

Download
memory/4496-13-0x000002E465570000-0x000002E4655B0000-memory.dmp

Filesize
256KB

Download
memory/4496-45-0x000002E47FC80000-0x000002E47FCD0000-memory.dmp

Filesize
320KB

Download
memory/4496-46-0x000002E465A40000-0x000002E465A5E000-memory.dmp

Filesize
120KB

Download
memory/4496-15-0x00007FFDB2F23000-0x00007FFDB2F25000-memory.dmp

Filesize
8KB

Download
memory/4496-82-0x000002E465A30000-0x000002E465A3A000-memory.dmp

Filesize
40KB

Download
memory/4496-83-0x000002E47FD80000-0x000002E47FD92000-memory.dmp

Filesize
72KB

Download
memory/4496-17-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

Filesize
10.8MB

Download
memory/4496-101-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

Filesize
10.8MB

Download
memory/4880-23-0x000001EEFE9B0000-0x000001EEFE9D2000-memory.dmp

Filesize
136KB

Download