umbral | 52770ec8f2e84b3e264870a7533286670e61bff2c8932f0cd6cc1f60af3323ae

Analysis

max time kernel
7s
max time network
19s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
05-11-2023 03:19

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General

Target

ConsoleApplication1.obf.exe
Size

424KB
MD5

9764ad0ba2c14105efa6cb7462beda58
SHA1

40c717e44479d0460a2b1789dbaf61a648b038a9
SHA256

52770ec8f2e84b3e264870a7533286670e61bff2c8932f0cd6cc1f60af3323ae
SHA512

d5a5313f377d17a21ec485b6e8ef6ccc02864b4cda1e8c4d47c790a60e3f0430a8fdf482fcfe116b52fb063f298abd594ff9167c68ffda23f0c69fb84d299309
SSDEEP

6144:hY2cJFqVZloZM9rIkd8g+EtXHkv/iD4ZZACl98e1mbiB8BOaedF6IxI:OpJFqVroZOL+EP8h7nuMawF6

Score

10^/10

umbral spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1170536634891128902/hdNxkvpSxRXfW2ouud2imDE8eFbcAfoi3fBBxpcoRyxI8E-rxHT7NHLuI-Q-ThYq7M3H

Signatures

Detect Umbral payload 3 IoCs

resource	yara_rule
behavioral1/files/0x0008000000022d1a-6.dat	family_umbral
behavioral1/files/0x0008000000022d1a-8.dat	family_umbral
behavioral1/memory/1232-9-0x000001CAB1DD0000-0x000001CAB1E10000-memory.dmp	family_umbral

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

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe

Executes dropped EXE 2 IoCs

pid	Process
2668	aJWTG7XmdTpodQAaYnZxLv6pA5Dqot49.exe
1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.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
43	ip-api.com

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\System32\Speech\aJWTG7XmdTpodQAaYnZxLv6pA5Dqot49.exe	ConsoleApplication1.obf.exe
File created	C:\Windows\System32\Speech\PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	ConsoleApplication1.obf.exe
File opened for modification	C:\Windows\System32\Speech\PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	attrib.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2328	powershell.exe
2328	powershell.exe
4192	powershell.exe
4192	powershell.exe
2840	powershell.exe
2840	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe
Token: SeDebugPrivilege	2328	powershell.exe
Token: SeDebugPrivilege	4192	powershell.exe
Token: SeDebugPrivilege	2840	powershell.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2584 wrote to memory of 2668	2584	ConsoleApplication1.obf.exe	89
PID 2584 wrote to memory of 2668	2584	ConsoleApplication1.obf.exe	89
PID 2584 wrote to memory of 2668	2584	ConsoleApplication1.obf.exe	89
PID 2584 wrote to memory of 1232	2584	ConsoleApplication1.obf.exe	91
PID 2584 wrote to memory of 1232	2584	ConsoleApplication1.obf.exe	91
PID 1232 wrote to memory of 836	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	92
PID 1232 wrote to memory of 836	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	92
PID 1232 wrote to memory of 2328	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	94
PID 1232 wrote to memory of 2328	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	94
PID 1232 wrote to memory of 4192	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	97
PID 1232 wrote to memory of 4192	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	97
PID 1232 wrote to memory of 2840	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	100
PID 1232 wrote to memory of 2840	1232	PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe	100

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
836	attrib.exe

C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1.obf.exe
"C:\Users\Admin\AppData\Local\Temp\ConsoleApplication1.obf.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2584
- C:\Windows\System32\Speech\aJWTG7XmdTpodQAaYnZxLv6pA5Dqot49.exe
  C:\Windows\System32\Speech\aJWTG7XmdTpodQAaYnZxLv6pA5Dqot49.exe
  2⤵
  - Executes dropped EXE
  PID:2668
- C:\Windows\System32\Speech\PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe
  C:\Windows\System32\Speech\PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe
  2⤵
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1232
- - C:\Windows\SYSTEM32\attrib.exe
    "attrib.exe" +h +s "C:\Windows\System32\Speech\PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:836
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Windows\System32\Speech\PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe'
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2328
- - 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:4192
- - 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:2840
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
    3⤵
    PID:2372
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" os get Caption
    3⤵
    PID:4432
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" computersystem get totalphysicalmemory
    3⤵
    PID:3208
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    PID:2560
- - 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:2660

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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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
1KB

MD5
b3ae619d7b2e604c5cda175980a9e909

SHA1
7fc9e9750d42637f9a663a4e143ccf8666249d02

SHA256
64ea1d41f18f3e3a3bef881901858bd8fed54f52d801521f9a3686073683b500

SHA512
bc72d169b668e759168b08e753591e81bf8fd08a41b7b14522bbc071ebc16548af231ad4a49385df31c690fa456a7b27c1f3554a80acc0a99e877c6717b377e0

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

Filesize
944B

MD5
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
948B

MD5
a4d919c0b86abb8726889c70aa684ce6

SHA1
0c3d34a077526faea0c816b083d6b1594839aac8

SHA256
b40885d7d80c8b07f2b227cca9848c856257713d908f303390eb3c5b2ee4241a

SHA512
9af2bab67d210df0e710141123b4dc6e0613e5becdc2e58264d3f81ccad195d4b3f963f6dca71ebda40f26a0d57b9c730183d6b470fac677c8199890417423b9

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

Filesize
1KB

MD5
b0a78e60bfb279d18fd3d6e7a67411f5

SHA1
9344fe3654a14bc66afb9dc6ea215fabfbe5c906

SHA256
a28890c82033d3deaf5770ecd1b0239c77321acc93704b1d4b1e167b91e30aeb

SHA512
9548be23bec645cd705482f78d43b63659e38cf879c34f7071f42fd86ee02039379a5e92fbe0f1c74c12aaebabdd8002f57eba111d3e855cbd0c89a110e346f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2ys2lioz.dti.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Windows\System32\Speech\PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe

Filesize
227KB

MD5
ef2711e9aeeb23297016ef32b46a3c7e

SHA1
ba51f478c1118d7803620367cb97ce2ceba52a5a

SHA256
2fe65b8585389b60e44f688f755bbaefe5a3689737050a96c7586bd9b69a9759

SHA512
3c5453a308f0f8321141c2949540f7c3a7c9774eb9e8767210ee30e9745caee0e8bafa8806736f1ec04bd952aa411a5a38a6c97fe19bea3d8d86729571a7059f

Download Submit
C:\Windows\System32\Speech\PFjCYKvY6iOmt1PXsCUkvtRGoBX7DypU.exe

Filesize
227KB

MD5
ef2711e9aeeb23297016ef32b46a3c7e

SHA1
ba51f478c1118d7803620367cb97ce2ceba52a5a

SHA256
2fe65b8585389b60e44f688f755bbaefe5a3689737050a96c7586bd9b69a9759

SHA512
3c5453a308f0f8321141c2949540f7c3a7c9774eb9e8767210ee30e9745caee0e8bafa8806736f1ec04bd952aa411a5a38a6c97fe19bea3d8d86729571a7059f

Download Submit
C:\Windows\System32\Speech\aJWTG7XmdTpodQAaYnZxLv6pA5Dqot49.exe

Filesize
11KB

MD5
cebf7458dceffcbb81a290cf045beb27

SHA1
98c74fa610995d61d2ee78a2ea888e003e9f436d

SHA256
97d22321ba783bf6d2119320d38d776bbc6bef42fe3dadecf512e23bbdd29660

SHA512
144f0da1e8060e08340f1b349f7bbb17be298ee3d27d056d5603143125b8a9d7abb9485d0f5a2a26e2e50f0d5970ecf5fc3a9e665eece70414c6dc1504b04a91

Download Submit
memory/1232-10-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/1232-98-0x000001CAB3B80000-0x000001CAB3B8A000-memory.dmp

Filesize
40KB

Download
memory/1232-99-0x000001CACC530000-0x000001CACC542000-memory.dmp

Filesize
72KB

Download
memory/1232-11-0x000001CACC390000-0x000001CACC3A0000-memory.dmp

Filesize
64KB

Download
memory/1232-53-0x000001CACC390000-0x000001CACC3A0000-memory.dmp

Filesize
64KB

Download
memory/1232-45-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/1232-52-0x000001CACC620000-0x000001CACC63E000-memory.dmp

Filesize
120KB

Download
memory/1232-51-0x000001CACC4E0000-0x000001CACC530000-memory.dmp

Filesize
320KB

Download
memory/1232-50-0x000001CACC560000-0x000001CACC5D6000-memory.dmp

Filesize
472KB

Download
memory/1232-9-0x000001CAB1DD0000-0x000001CAB1E10000-memory.dmp

Filesize
256KB

Download
memory/2328-25-0x0000018BE5A90000-0x0000018BE5AA0000-memory.dmp

Filesize
64KB

Download
memory/2328-26-0x0000018BE5A90000-0x0000018BE5AA0000-memory.dmp

Filesize
64KB

Download
memory/2328-12-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/2328-23-0x0000018BE5A90000-0x0000018BE5AA0000-memory.dmp

Filesize
64KB

Download
memory/2328-22-0x0000018BE5A10000-0x0000018BE5A32000-memory.dmp

Filesize
136KB

Download
memory/2328-24-0x0000018BE5A90000-0x0000018BE5AA0000-memory.dmp

Filesize
64KB

Download
memory/2328-29-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/2372-91-0x000002226B020000-0x000002226B030000-memory.dmp

Filesize
64KB

Download
memory/2372-94-0x000002226B020000-0x000002226B030000-memory.dmp

Filesize
64KB

Download
memory/2372-96-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/2372-92-0x000002226B020000-0x000002226B030000-memory.dmp

Filesize
64KB

Download
memory/2372-90-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/2660-102-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/2660-115-0x000002B86AA00000-0x000002B86AA10000-memory.dmp

Filesize
64KB

Download
memory/2660-103-0x000002B86AA00000-0x000002B86AA10000-memory.dmp

Filesize
64KB

Download
memory/2660-104-0x000002B86AA00000-0x000002B86AA10000-memory.dmp

Filesize
64KB

Download
memory/2840-77-0x000001FE8A010000-0x000001FE8A020000-memory.dmp

Filesize
64KB

Download
memory/2840-80-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/2840-55-0x000001FE8A010000-0x000001FE8A020000-memory.dmp

Filesize
64KB

Download
memory/2840-54-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/4192-31-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/4192-42-0x000001CA484F0000-0x000001CA48500000-memory.dmp

Filesize
64KB

Download
memory/4192-47-0x00007FFC8FB10000-0x00007FFC905D1000-memory.dmp

Filesize
10.8MB

Download
memory/4192-41-0x000001CA484F0000-0x000001CA48500000-memory.dmp

Filesize
64KB

Download
memory/4192-44-0x000001CA484F0000-0x000001CA48500000-memory.dmp

Filesize
64KB

Download