umbral | 2464cc00fd3a0e7b5fd2e171e967b2ef65fde94bff68dda2dab12e2b9dce108d

Analysis

max time kernel
118s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2024 09:35

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General

Target

octosint.exe
Size

628KB
MD5

b4effaa19b06eb4a92b66b0ff2702c91
SHA1

703aa3cec640517f6e51033c27bef4bbeb9afe9b
SHA256

2464cc00fd3a0e7b5fd2e171e967b2ef65fde94bff68dda2dab12e2b9dce108d
SHA512

d7e379b2148dc4697e7cd1529ef88bc5386f66df992afcb4423b4f24a7402b18531aee341c3dc22fe97d37583d7856a13cd1cdbeb341b042f0b547f485e09cd8
SSDEEP

12288:2oZtL+EP8GwI8EKtFu9r20VJg2VFRiMdRC:qI8fI8EKtFu9r20VJg2hiMdA

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/5012-1-0x000001CD17890000-0x000001CD17934000-memory.dmp	family_umbral

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

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
4136	powershell.exe
876	powershell.exe
2532	powershell.exe
3180	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

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

Web Service

T1102

flow	ioc
22	discord.com
23	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
7	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
4452	cmd.exe
4348	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3872	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4348	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
5012	octosint.exe
4136	powershell.exe
4136	powershell.exe
2532	powershell.exe
2532	powershell.exe
3180	powershell.exe
3180	powershell.exe
2284	powershell.exe
2284	powershell.exe
876	powershell.exe
876	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	5012	octosint.exe
Token: SeIncreaseQuotaPrivilege	3540	wmic.exe
Token: SeSecurityPrivilege	3540	wmic.exe
Token: SeTakeOwnershipPrivilege	3540	wmic.exe
Token: SeLoadDriverPrivilege	3540	wmic.exe
Token: SeSystemProfilePrivilege	3540	wmic.exe
Token: SeSystemtimePrivilege	3540	wmic.exe
Token: SeProfSingleProcessPrivilege	3540	wmic.exe
Token: SeIncBasePriorityPrivilege	3540	wmic.exe
Token: SeCreatePagefilePrivilege	3540	wmic.exe
Token: SeBackupPrivilege	3540	wmic.exe
Token: SeRestorePrivilege	3540	wmic.exe
Token: SeShutdownPrivilege	3540	wmic.exe
Token: SeDebugPrivilege	3540	wmic.exe
Token: SeSystemEnvironmentPrivilege	3540	wmic.exe
Token: SeRemoteShutdownPrivilege	3540	wmic.exe
Token: SeUndockPrivilege	3540	wmic.exe
Token: SeManageVolumePrivilege	3540	wmic.exe
Token: 33	3540	wmic.exe
Token: 34	3540	wmic.exe
Token: 35	3540	wmic.exe
Token: 36	3540	wmic.exe
Token: SeIncreaseQuotaPrivilege	3540	wmic.exe
Token: SeSecurityPrivilege	3540	wmic.exe
Token: SeTakeOwnershipPrivilege	3540	wmic.exe
Token: SeLoadDriverPrivilege	3540	wmic.exe
Token: SeSystemProfilePrivilege	3540	wmic.exe
Token: SeSystemtimePrivilege	3540	wmic.exe
Token: SeProfSingleProcessPrivilege	3540	wmic.exe
Token: SeIncBasePriorityPrivilege	3540	wmic.exe
Token: SeCreatePagefilePrivilege	3540	wmic.exe
Token: SeBackupPrivilege	3540	wmic.exe
Token: SeRestorePrivilege	3540	wmic.exe
Token: SeShutdownPrivilege	3540	wmic.exe
Token: SeDebugPrivilege	3540	wmic.exe
Token: SeSystemEnvironmentPrivilege	3540	wmic.exe
Token: SeRemoteShutdownPrivilege	3540	wmic.exe
Token: SeUndockPrivilege	3540	wmic.exe
Token: SeManageVolumePrivilege	3540	wmic.exe
Token: 33	3540	wmic.exe
Token: 34	3540	wmic.exe
Token: 35	3540	wmic.exe
Token: 36	3540	wmic.exe
Token: SeDebugPrivilege	4136	powershell.exe
Token: SeDebugPrivilege	2532	powershell.exe
Token: SeDebugPrivilege	3180	powershell.exe
Token: SeDebugPrivilege	2284	powershell.exe
Token: SeIncreaseQuotaPrivilege	2628	wmic.exe
Token: SeSecurityPrivilege	2628	wmic.exe
Token: SeTakeOwnershipPrivilege	2628	wmic.exe
Token: SeLoadDriverPrivilege	2628	wmic.exe
Token: SeSystemProfilePrivilege	2628	wmic.exe
Token: SeSystemtimePrivilege	2628	wmic.exe
Token: SeProfSingleProcessPrivilege	2628	wmic.exe
Token: SeIncBasePriorityPrivilege	2628	wmic.exe
Token: SeCreatePagefilePrivilege	2628	wmic.exe
Token: SeBackupPrivilege	2628	wmic.exe
Token: SeRestorePrivilege	2628	wmic.exe
Token: SeShutdownPrivilege	2628	wmic.exe
Token: SeDebugPrivilege	2628	wmic.exe
Token: SeSystemEnvironmentPrivilege	2628	wmic.exe
Token: SeRemoteShutdownPrivilege	2628	wmic.exe
Token: SeUndockPrivilege	2628	wmic.exe
Token: SeManageVolumePrivilege	2628	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 5012 wrote to memory of 3540	5012	octosint.exe	83
PID 5012 wrote to memory of 3540	5012	octosint.exe	83
PID 5012 wrote to memory of 4812	5012	octosint.exe	86
PID 5012 wrote to memory of 4812	5012	octosint.exe	86
PID 5012 wrote to memory of 4136	5012	octosint.exe	88
PID 5012 wrote to memory of 4136	5012	octosint.exe	88
PID 5012 wrote to memory of 2532	5012	octosint.exe	90
PID 5012 wrote to memory of 2532	5012	octosint.exe	90
PID 5012 wrote to memory of 3180	5012	octosint.exe	92
PID 5012 wrote to memory of 3180	5012	octosint.exe	92
PID 5012 wrote to memory of 2284	5012	octosint.exe	94
PID 5012 wrote to memory of 2284	5012	octosint.exe	94
PID 5012 wrote to memory of 2628	5012	octosint.exe	97
PID 5012 wrote to memory of 2628	5012	octosint.exe	97
PID 5012 wrote to memory of 516	5012	octosint.exe	99
PID 5012 wrote to memory of 516	5012	octosint.exe	99
PID 5012 wrote to memory of 1316	5012	octosint.exe	101
PID 5012 wrote to memory of 1316	5012	octosint.exe	101
PID 5012 wrote to memory of 876	5012	octosint.exe	103
PID 5012 wrote to memory of 876	5012	octosint.exe	103
PID 5012 wrote to memory of 3872	5012	octosint.exe	105
PID 5012 wrote to memory of 3872	5012	octosint.exe	105
PID 5012 wrote to memory of 4452	5012	octosint.exe	107
PID 5012 wrote to memory of 4452	5012	octosint.exe	107
PID 4452 wrote to memory of 4348	4452	cmd.exe	109
PID 4452 wrote to memory of 4348	4452	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4812	attrib.exe

C:\Users\Admin\AppData\Local\Temp\octosint.exe
"C:\Users\Admin\AppData\Local\Temp\octosint.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5012
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3540
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\octosint.exe"
  2⤵
  - Views/modifies file attributes
  PID:4812
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\octosint.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4136
- 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:2532
- 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:3180
- 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:2284
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2628
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1316
- 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:876
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3872
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\octosint.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4452
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4348

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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
b5e2fd95470c50743ba121fd6bd03a7b

SHA1
75545ed499d9dde51a1fc1cf535eb4f50ec79250

SHA256
d9c961aaf784b9ce81b0a3aac7a39bd41e9f2702d9c28deb20e786d385b88288

SHA512
76bdc793f8b38f603b5ad0957474660bb09e963a2496564b8ceac6591d532fc9498214b81c3908bafc13ff0b07028457c6c997998adfd2203304cb1c82899423

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ei3rfmbh.txv.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4136-4-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4136-17-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/4136-10-0x0000020848150000-0x0000020848172000-memory.dmp

Filesize
136KB

Download
memory/4136-3-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/5012-0-0x00007FFE304F3000-0x00007FFE304F5000-memory.dmp

Filesize
8KB

Download
memory/5012-32-0x000001CD320A0000-0x000001CD32116000-memory.dmp

Filesize
472KB

Download
memory/5012-33-0x000001CD32020000-0x000001CD32070000-memory.dmp

Filesize
320KB

Download
memory/5012-34-0x000001CD31EC0000-0x000001CD31EDE000-memory.dmp

Filesize
120KB

Download
memory/5012-2-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download
memory/5012-71-0x000001CD31EF0000-0x000001CD31EFA000-memory.dmp

Filesize
40KB

Download
memory/5012-72-0x000001CD32120000-0x000001CD32132000-memory.dmp

Filesize
72KB

Download
memory/5012-1-0x000001CD17890000-0x000001CD17934000-memory.dmp

Filesize
656KB

Download
memory/5012-92-0x00007FFE304F0000-0x00007FFE30FB1000-memory.dmp

Filesize
10.8MB

Download