umbral | 0a138d71d9cdd9c772628844181e087bc8f2f650e37702f131a32bf8d790867c

Analysis

max time kernel
38s
max time network
40s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
27-08-2024 20:18

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Reason

Machine shutdown

Report Analysis Logs

General

Target

fn.exe
Size

231KB
MD5

dd37f3db081031f72358bb3b9edf4e21
SHA1

256023f67c0f6e3717d1e9a338187c33d16b6574
SHA256

0a138d71d9cdd9c772628844181e087bc8f2f650e37702f131a32bf8d790867c
SHA512

08f1776d67fbef2d4139031abd5fdbd953e8312d54563883b4c45df3dc4376356e24be7a84b47e20d6c9c20f771ce8b7fce4f8468c046743a77a7f4893dd812c
SSDEEP

6144:xloZMzrIkd8g+EtXHkv/iD4lDkgJX8QfP+nJUg1Nvmb8e1m6Fi:DoZcL+EP8lDkgJX8QfP+nJUg1sQ

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4336-1-0x000001AC8A700000-0x000001AC8A740000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
5116	powershell.exe
4524	powershell.exe
2956	powershell.exe
4904	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	fn.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
30	discord.com
31	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
6	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1276	cmd.exe
1940	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2356	wmic.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "237"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1940	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4336	fn.exe
5116	powershell.exe
5116	powershell.exe
4524	powershell.exe
4524	powershell.exe
2956	powershell.exe
2956	powershell.exe
4920	powershell.exe
4920	powershell.exe
4904	powershell.exe
4904	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4336	fn.exe
Token: SeIncreaseQuotaPrivilege	4092	wmic.exe
Token: SeSecurityPrivilege	4092	wmic.exe
Token: SeTakeOwnershipPrivilege	4092	wmic.exe
Token: SeLoadDriverPrivilege	4092	wmic.exe
Token: SeSystemProfilePrivilege	4092	wmic.exe
Token: SeSystemtimePrivilege	4092	wmic.exe
Token: SeProfSingleProcessPrivilege	4092	wmic.exe
Token: SeIncBasePriorityPrivilege	4092	wmic.exe
Token: SeCreatePagefilePrivilege	4092	wmic.exe
Token: SeBackupPrivilege	4092	wmic.exe
Token: SeRestorePrivilege	4092	wmic.exe
Token: SeShutdownPrivilege	4092	wmic.exe
Token: SeDebugPrivilege	4092	wmic.exe
Token: SeSystemEnvironmentPrivilege	4092	wmic.exe
Token: SeRemoteShutdownPrivilege	4092	wmic.exe
Token: SeUndockPrivilege	4092	wmic.exe
Token: SeManageVolumePrivilege	4092	wmic.exe
Token: 33	4092	wmic.exe
Token: 34	4092	wmic.exe
Token: 35	4092	wmic.exe
Token: 36	4092	wmic.exe
Token: SeIncreaseQuotaPrivilege	4092	wmic.exe
Token: SeSecurityPrivilege	4092	wmic.exe
Token: SeTakeOwnershipPrivilege	4092	wmic.exe
Token: SeLoadDriverPrivilege	4092	wmic.exe
Token: SeSystemProfilePrivilege	4092	wmic.exe
Token: SeSystemtimePrivilege	4092	wmic.exe
Token: SeProfSingleProcessPrivilege	4092	wmic.exe
Token: SeIncBasePriorityPrivilege	4092	wmic.exe
Token: SeCreatePagefilePrivilege	4092	wmic.exe
Token: SeBackupPrivilege	4092	wmic.exe
Token: SeRestorePrivilege	4092	wmic.exe
Token: SeShutdownPrivilege	4092	wmic.exe
Token: SeDebugPrivilege	4092	wmic.exe
Token: SeSystemEnvironmentPrivilege	4092	wmic.exe
Token: SeRemoteShutdownPrivilege	4092	wmic.exe
Token: SeUndockPrivilege	4092	wmic.exe
Token: SeManageVolumePrivilege	4092	wmic.exe
Token: 33	4092	wmic.exe
Token: 34	4092	wmic.exe
Token: 35	4092	wmic.exe
Token: 36	4092	wmic.exe
Token: SeDebugPrivilege	5116	powershell.exe
Token: SeDebugPrivilege	4524	powershell.exe
Token: SeDebugPrivilege	2956	powershell.exe
Token: SeDebugPrivilege	4920	powershell.exe
Token: SeIncreaseQuotaPrivilege	4956	wmic.exe
Token: SeSecurityPrivilege	4956	wmic.exe
Token: SeTakeOwnershipPrivilege	4956	wmic.exe
Token: SeLoadDriverPrivilege	4956	wmic.exe
Token: SeSystemProfilePrivilege	4956	wmic.exe
Token: SeSystemtimePrivilege	4956	wmic.exe
Token: SeProfSingleProcessPrivilege	4956	wmic.exe
Token: SeIncBasePriorityPrivilege	4956	wmic.exe
Token: SeCreatePagefilePrivilege	4956	wmic.exe
Token: SeBackupPrivilege	4956	wmic.exe
Token: SeRestorePrivilege	4956	wmic.exe
Token: SeShutdownPrivilege	4956	wmic.exe
Token: SeDebugPrivilege	4956	wmic.exe
Token: SeSystemEnvironmentPrivilege	4956	wmic.exe
Token: SeRemoteShutdownPrivilege	4956	wmic.exe
Token: SeUndockPrivilege	4956	wmic.exe
Token: SeManageVolumePrivilege	4956	wmic.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4620	LogonUI.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4336 wrote to memory of 4092	4336	fn.exe	85
PID 4336 wrote to memory of 4092	4336	fn.exe	85
PID 4336 wrote to memory of 4540	4336	fn.exe	90
PID 4336 wrote to memory of 4540	4336	fn.exe	90
PID 4336 wrote to memory of 5116	4336	fn.exe	92
PID 4336 wrote to memory of 5116	4336	fn.exe	92
PID 4336 wrote to memory of 4524	4336	fn.exe	95
PID 4336 wrote to memory of 4524	4336	fn.exe	95
PID 4336 wrote to memory of 2956	4336	fn.exe	97
PID 4336 wrote to memory of 2956	4336	fn.exe	97
PID 4336 wrote to memory of 4920	4336	fn.exe	99
PID 4336 wrote to memory of 4920	4336	fn.exe	99
PID 4336 wrote to memory of 4956	4336	fn.exe	103
PID 4336 wrote to memory of 4956	4336	fn.exe	103
PID 4336 wrote to memory of 4472	4336	fn.exe	105
PID 4336 wrote to memory of 4472	4336	fn.exe	105
PID 4336 wrote to memory of 4396	4336	fn.exe	108
PID 4336 wrote to memory of 4396	4336	fn.exe	108
PID 4336 wrote to memory of 4904	4336	fn.exe	110
PID 4336 wrote to memory of 4904	4336	fn.exe	110
PID 4336 wrote to memory of 2356	4336	fn.exe	112
PID 4336 wrote to memory of 2356	4336	fn.exe	112
PID 4336 wrote to memory of 1276	4336	fn.exe	117
PID 4336 wrote to memory of 1276	4336	fn.exe	117
PID 1276 wrote to memory of 1940	1276	cmd.exe	119
PID 1276 wrote to memory of 1940	1276	cmd.exe	119

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4540	attrib.exe

C:\Users\Admin\AppData\Local\Temp\fn.exe
"C:\Users\Admin\AppData\Local\Temp\fn.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4336
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4092
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\fn.exe"
  2⤵
  - Views/modifies file attributes
  PID:4540
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\fn.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5116
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4524
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2956
- 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:4920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4956
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4472
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4396
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4904
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2356
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\fn.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1276
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1940

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa396a055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4620

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

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

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

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

Filesize
1KB

MD5
4f6095383ffb0fc58888a52ede329759

SHA1
65cbce89c6386b3414b3ff4ff725ab88d9744e4e

SHA256
082238148cfad6287f9a0906e3095fc49f831f12dffd8a8611f2e83685b8060c

SHA512
ef96b60b449bb055e2942307a8eab1e7779e13f3f44bb5420d82c9f8f7efdd7673721e1eaae065295b419f00f3d7fd63b63068a0666df728d227c59f3568eccb

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_biejua4o.nk5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4336-70-0x000001ACA4DE0000-0x000001ACA4DEA000-memory.dmp

Filesize
40KB

Download
memory/4336-34-0x000001ACA4F20000-0x000001ACA4F3E000-memory.dmp

Filesize
120KB

Download
memory/4336-91-0x00007FFE73910000-0x00007FFE743D1000-memory.dmp

Filesize
10.8MB

Download
memory/4336-87-0x00007FFE73910000-0x00007FFE743D1000-memory.dmp

Filesize
10.8MB

Download
memory/4336-2-0x00007FFE73910000-0x00007FFE743D1000-memory.dmp

Filesize
10.8MB

Download
memory/4336-32-0x000001ACA4E50000-0x000001ACA4EC6000-memory.dmp

Filesize
472KB

Download
memory/4336-33-0x000001ACA4ED0000-0x000001ACA4F20000-memory.dmp

Filesize
320KB

Download
memory/4336-86-0x00007FFE73913000-0x00007FFE73915000-memory.dmp

Filesize
8KB

Download
memory/4336-1-0x000001AC8A700000-0x000001AC8A740000-memory.dmp

Filesize
256KB

Download
memory/4336-0-0x00007FFE73913000-0x00007FFE73915000-memory.dmp

Filesize
8KB

Download
memory/4336-71-0x000001ACA4E10000-0x000001ACA4E22000-memory.dmp

Filesize
72KB

Download
memory/5116-5-0x00007FFE73910000-0x00007FFE743D1000-memory.dmp

Filesize
10.8MB

Download
memory/5116-4-0x0000027FBB400000-0x0000027FBB422000-memory.dmp

Filesize
136KB

Download
memory/5116-15-0x00007FFE73910000-0x00007FFE743D1000-memory.dmp

Filesize
10.8MB

Download
memory/5116-3-0x00007FFE73910000-0x00007FFE743D1000-memory.dmp

Filesize
10.8MB

Download
memory/5116-18-0x00007FFE73910000-0x00007FFE743D1000-memory.dmp

Filesize
10.8MB

Download