umbral | 0bb64c9c095b99117d8250f97cda9a257985ce3ba6b5891796c7ece426b61ed0

Analysis

max time kernel
140s
max time network
136s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20-08-2024 20:38

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General

Target

rnZ46.scr.exe
Size

227KB
MD5

fe415b65db443f8d7e3aa075d79b4a72
SHA1

71fa4604b053ac55c7afa5a2d87ea0bcf8d0a116
SHA256

0bb64c9c095b99117d8250f97cda9a257985ce3ba6b5891796c7ece426b61ed0
SHA512

dc715d2c938f22446f155afa615adbee775eb7abdc688b204037eccadd435490be3ab0fe6b2a9d493cb357de5730e864ffb842c42dc3051671a7fbc9a9117fb8
SSDEEP

6144:+loZM9rIkd8g+EtXHkv/iD4W9YhFzQEbmCzFQMpi+b8e1mSPi:ooZOL+EP8W9YhFzQEbmCzFQMp9Pa

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2816-1-0x000001AF87320000-0x000001AF87360000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3276	powershell.exe
2584	powershell.exe
4788	powershell.exe
4512	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	rnZ46.scr.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
27	discord.com
28	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
18	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
3820	cmd.exe
212	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1228	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
212	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4512	powershell.exe
4512	powershell.exe
3276	powershell.exe
3276	powershell.exe
2584	powershell.exe
2584	powershell.exe
1640	powershell.exe
1640	powershell.exe
4788	powershell.exe
4788	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2816	rnZ46.scr.exe
Token: SeDebugPrivilege	4512	powershell.exe
Token: SeDebugPrivilege	3276	powershell.exe
Token: SeDebugPrivilege	2584	powershell.exe
Token: SeDebugPrivilege	1640	powershell.exe
Token: SeIncreaseQuotaPrivilege	1716	wmic.exe
Token: SeSecurityPrivilege	1716	wmic.exe
Token: SeTakeOwnershipPrivilege	1716	wmic.exe
Token: SeLoadDriverPrivilege	1716	wmic.exe
Token: SeSystemProfilePrivilege	1716	wmic.exe
Token: SeSystemtimePrivilege	1716	wmic.exe
Token: SeProfSingleProcessPrivilege	1716	wmic.exe
Token: SeIncBasePriorityPrivilege	1716	wmic.exe
Token: SeCreatePagefilePrivilege	1716	wmic.exe
Token: SeBackupPrivilege	1716	wmic.exe
Token: SeRestorePrivilege	1716	wmic.exe
Token: SeShutdownPrivilege	1716	wmic.exe
Token: SeDebugPrivilege	1716	wmic.exe
Token: SeSystemEnvironmentPrivilege	1716	wmic.exe
Token: SeRemoteShutdownPrivilege	1716	wmic.exe
Token: SeUndockPrivilege	1716	wmic.exe
Token: SeManageVolumePrivilege	1716	wmic.exe
Token: 33	1716	wmic.exe
Token: 34	1716	wmic.exe
Token: 35	1716	wmic.exe
Token: 36	1716	wmic.exe
Token: SeIncreaseQuotaPrivilege	1716	wmic.exe
Token: SeSecurityPrivilege	1716	wmic.exe
Token: SeTakeOwnershipPrivilege	1716	wmic.exe
Token: SeLoadDriverPrivilege	1716	wmic.exe
Token: SeSystemProfilePrivilege	1716	wmic.exe
Token: SeSystemtimePrivilege	1716	wmic.exe
Token: SeProfSingleProcessPrivilege	1716	wmic.exe
Token: SeIncBasePriorityPrivilege	1716	wmic.exe
Token: SeCreatePagefilePrivilege	1716	wmic.exe
Token: SeBackupPrivilege	1716	wmic.exe
Token: SeRestorePrivilege	1716	wmic.exe
Token: SeShutdownPrivilege	1716	wmic.exe
Token: SeDebugPrivilege	1716	wmic.exe
Token: SeSystemEnvironmentPrivilege	1716	wmic.exe
Token: SeRemoteShutdownPrivilege	1716	wmic.exe
Token: SeUndockPrivilege	1716	wmic.exe
Token: SeManageVolumePrivilege	1716	wmic.exe
Token: 33	1716	wmic.exe
Token: 34	1716	wmic.exe
Token: 35	1716	wmic.exe
Token: 36	1716	wmic.exe
Token: SeIncreaseQuotaPrivilege	4492	wmic.exe
Token: SeSecurityPrivilege	4492	wmic.exe
Token: SeTakeOwnershipPrivilege	4492	wmic.exe
Token: SeLoadDriverPrivilege	4492	wmic.exe
Token: SeSystemProfilePrivilege	4492	wmic.exe
Token: SeSystemtimePrivilege	4492	wmic.exe
Token: SeProfSingleProcessPrivilege	4492	wmic.exe
Token: SeIncBasePriorityPrivilege	4492	wmic.exe
Token: SeCreatePagefilePrivilege	4492	wmic.exe
Token: SeBackupPrivilege	4492	wmic.exe
Token: SeRestorePrivilege	4492	wmic.exe
Token: SeShutdownPrivilege	4492	wmic.exe
Token: SeDebugPrivilege	4492	wmic.exe
Token: SeSystemEnvironmentPrivilege	4492	wmic.exe
Token: SeRemoteShutdownPrivilege	4492	wmic.exe
Token: SeUndockPrivilege	4492	wmic.exe
Token: SeManageVolumePrivilege	4492	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2816 wrote to memory of 1364	2816	rnZ46.scr.exe	85
PID 2816 wrote to memory of 1364	2816	rnZ46.scr.exe	85
PID 2816 wrote to memory of 4512	2816	rnZ46.scr.exe	87
PID 2816 wrote to memory of 4512	2816	rnZ46.scr.exe	87
PID 2816 wrote to memory of 3276	2816	rnZ46.scr.exe	90
PID 2816 wrote to memory of 3276	2816	rnZ46.scr.exe	90
PID 2816 wrote to memory of 2584	2816	rnZ46.scr.exe	92
PID 2816 wrote to memory of 2584	2816	rnZ46.scr.exe	92
PID 2816 wrote to memory of 1640	2816	rnZ46.scr.exe	95
PID 2816 wrote to memory of 1640	2816	rnZ46.scr.exe	95
PID 2816 wrote to memory of 1716	2816	rnZ46.scr.exe	99
PID 2816 wrote to memory of 1716	2816	rnZ46.scr.exe	99
PID 2816 wrote to memory of 4492	2816	rnZ46.scr.exe	102
PID 2816 wrote to memory of 4492	2816	rnZ46.scr.exe	102
PID 2816 wrote to memory of 2700	2816	rnZ46.scr.exe	104
PID 2816 wrote to memory of 2700	2816	rnZ46.scr.exe	104
PID 2816 wrote to memory of 4788	2816	rnZ46.scr.exe	106
PID 2816 wrote to memory of 4788	2816	rnZ46.scr.exe	106
PID 2816 wrote to memory of 1228	2816	rnZ46.scr.exe	109
PID 2816 wrote to memory of 1228	2816	rnZ46.scr.exe	109
PID 2816 wrote to memory of 3820	2816	rnZ46.scr.exe	111
PID 2816 wrote to memory of 3820	2816	rnZ46.scr.exe	111
PID 3820 wrote to memory of 212	3820	cmd.exe	113
PID 3820 wrote to memory of 212	3820	cmd.exe	113

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1364	attrib.exe

C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe
"C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2816
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe"
  2⤵
  - Views/modifies file attributes
  PID:1364
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4512
- 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:3276
- 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:2584
- 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:1640
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1716
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2700
- 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:4788
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1228
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\rnZ46.scr.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3820
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:212

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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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
ec79fae4e7c09310ebf4f2d85a33a638

SHA1
f2bdd995b12e65e7ed437d228f22223b59e76efb

SHA256
e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

SHA512
af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bylwdy11.hoo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1640-72-0x0000024469550000-0x000002446976C000-memory.dmp

Filesize
2.1MB

Download
memory/2584-60-0x000002B860DC0000-0x000002B860FDC000-memory.dmp

Filesize
2.1MB

Download
memory/2816-35-0x000001AFA1BC0000-0x000001AFA1C10000-memory.dmp

Filesize
320KB

Download
memory/2816-0-0x00007FFAF9093000-0x00007FFAF9095000-memory.dmp

Filesize
8KB

Download
memory/2816-2-0x00007FFAF9090000-0x00007FFAF9B51000-memory.dmp

Filesize
10.8MB

Download
memory/2816-1-0x000001AF87320000-0x000001AF87360000-memory.dmp

Filesize
256KB

Download
memory/2816-34-0x000001AFA1AD0000-0x000001AFA1B46000-memory.dmp

Filesize
472KB

Download
memory/2816-93-0x00007FFAF9090000-0x00007FFAF9B51000-memory.dmp

Filesize
10.8MB

Download
memory/2816-36-0x000001AFA1A50000-0x000001AFA1A6E000-memory.dmp

Filesize
120KB

Download
memory/2816-75-0x000001AFA1A70000-0x000001AFA1A82000-memory.dmp

Filesize
72KB

Download
memory/2816-74-0x000001AF890D0000-0x000001AF890DA000-memory.dmp

Filesize
40KB

Download
memory/4512-14-0x00007FFAF9090000-0x00007FFAF9B51000-memory.dmp

Filesize
10.8MB

Download
memory/4512-12-0x00007FFAF9090000-0x00007FFAF9B51000-memory.dmp

Filesize
10.8MB

Download
memory/4512-15-0x00007FFAF9090000-0x00007FFAF9B51000-memory.dmp

Filesize
10.8MB

Download
memory/4512-19-0x00007FFAF9090000-0x00007FFAF9B51000-memory.dmp

Filesize
10.8MB

Download
memory/4512-13-0x000001A7FFA90000-0x000001A7FFAB2000-memory.dmp

Filesize
136KB

Download
memory/4512-18-0x000001A799B90000-0x000001A799DAC000-memory.dmp

Filesize
2.1MB

Download