umbral | 2464cc00fd3a0e7b5fd2e171e967b2ef65fde94bff68dda2dab12e2b9dce108d

Analysis

max time kernel
93s
max time network
143s
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 08:54

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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
behavioral2/memory/1800-1-0x0000028B9FE60000-0x0000028B9FF04000-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
3168	powershell.exe
4672	powershell.exe
3632	powershell.exe
5080	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
948	cmd.exe
1848	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4776	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1848	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1800	octosint.exe
3168	powershell.exe
3168	powershell.exe
3632	powershell.exe
3632	powershell.exe
5080	powershell.exe
5080	powershell.exe
2332	powershell.exe
2332	powershell.exe
4672	powershell.exe
4672	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1800	octosint.exe
Token: SeIncreaseQuotaPrivilege	1404	wmic.exe
Token: SeSecurityPrivilege	1404	wmic.exe
Token: SeTakeOwnershipPrivilege	1404	wmic.exe
Token: SeLoadDriverPrivilege	1404	wmic.exe
Token: SeSystemProfilePrivilege	1404	wmic.exe
Token: SeSystemtimePrivilege	1404	wmic.exe
Token: SeProfSingleProcessPrivilege	1404	wmic.exe
Token: SeIncBasePriorityPrivilege	1404	wmic.exe
Token: SeCreatePagefilePrivilege	1404	wmic.exe
Token: SeBackupPrivilege	1404	wmic.exe
Token: SeRestorePrivilege	1404	wmic.exe
Token: SeShutdownPrivilege	1404	wmic.exe
Token: SeDebugPrivilege	1404	wmic.exe
Token: SeSystemEnvironmentPrivilege	1404	wmic.exe
Token: SeRemoteShutdownPrivilege	1404	wmic.exe
Token: SeUndockPrivilege	1404	wmic.exe
Token: SeManageVolumePrivilege	1404	wmic.exe
Token: 33	1404	wmic.exe
Token: 34	1404	wmic.exe
Token: 35	1404	wmic.exe
Token: 36	1404	wmic.exe
Token: SeIncreaseQuotaPrivilege	1404	wmic.exe
Token: SeSecurityPrivilege	1404	wmic.exe
Token: SeTakeOwnershipPrivilege	1404	wmic.exe
Token: SeLoadDriverPrivilege	1404	wmic.exe
Token: SeSystemProfilePrivilege	1404	wmic.exe
Token: SeSystemtimePrivilege	1404	wmic.exe
Token: SeProfSingleProcessPrivilege	1404	wmic.exe
Token: SeIncBasePriorityPrivilege	1404	wmic.exe
Token: SeCreatePagefilePrivilege	1404	wmic.exe
Token: SeBackupPrivilege	1404	wmic.exe
Token: SeRestorePrivilege	1404	wmic.exe
Token: SeShutdownPrivilege	1404	wmic.exe
Token: SeDebugPrivilege	1404	wmic.exe
Token: SeSystemEnvironmentPrivilege	1404	wmic.exe
Token: SeRemoteShutdownPrivilege	1404	wmic.exe
Token: SeUndockPrivilege	1404	wmic.exe
Token: SeManageVolumePrivilege	1404	wmic.exe
Token: 33	1404	wmic.exe
Token: 34	1404	wmic.exe
Token: 35	1404	wmic.exe
Token: 36	1404	wmic.exe
Token: SeDebugPrivilege	3168	powershell.exe
Token: SeDebugPrivilege	3632	powershell.exe
Token: SeDebugPrivilege	5080	powershell.exe
Token: SeDebugPrivilege	2332	powershell.exe
Token: SeIncreaseQuotaPrivilege	4220	wmic.exe
Token: SeSecurityPrivilege	4220	wmic.exe
Token: SeTakeOwnershipPrivilege	4220	wmic.exe
Token: SeLoadDriverPrivilege	4220	wmic.exe
Token: SeSystemProfilePrivilege	4220	wmic.exe
Token: SeSystemtimePrivilege	4220	wmic.exe
Token: SeProfSingleProcessPrivilege	4220	wmic.exe
Token: SeIncBasePriorityPrivilege	4220	wmic.exe
Token: SeCreatePagefilePrivilege	4220	wmic.exe
Token: SeBackupPrivilege	4220	wmic.exe
Token: SeRestorePrivilege	4220	wmic.exe
Token: SeShutdownPrivilege	4220	wmic.exe
Token: SeDebugPrivilege	4220	wmic.exe
Token: SeSystemEnvironmentPrivilege	4220	wmic.exe
Token: SeRemoteShutdownPrivilege	4220	wmic.exe
Token: SeUndockPrivilege	4220	wmic.exe
Token: SeManageVolumePrivilege	4220	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 1404	1800	octosint.exe	83
PID 1800 wrote to memory of 1404	1800	octosint.exe	83
PID 1800 wrote to memory of 3232	1800	octosint.exe	86
PID 1800 wrote to memory of 3232	1800	octosint.exe	86
PID 1800 wrote to memory of 3168	1800	octosint.exe	88
PID 1800 wrote to memory of 3168	1800	octosint.exe	88
PID 1800 wrote to memory of 3632	1800	octosint.exe	90
PID 1800 wrote to memory of 3632	1800	octosint.exe	90
PID 1800 wrote to memory of 5080	1800	octosint.exe	92
PID 1800 wrote to memory of 5080	1800	octosint.exe	92
PID 1800 wrote to memory of 2332	1800	octosint.exe	94
PID 1800 wrote to memory of 2332	1800	octosint.exe	94
PID 1800 wrote to memory of 4220	1800	octosint.exe	97
PID 1800 wrote to memory of 4220	1800	octosint.exe	97
PID 1800 wrote to memory of 4876	1800	octosint.exe	99
PID 1800 wrote to memory of 4876	1800	octosint.exe	99
PID 1800 wrote to memory of 3136	1800	octosint.exe	101
PID 1800 wrote to memory of 3136	1800	octosint.exe	101
PID 1800 wrote to memory of 4672	1800	octosint.exe	103
PID 1800 wrote to memory of 4672	1800	octosint.exe	103
PID 1800 wrote to memory of 4776	1800	octosint.exe	105
PID 1800 wrote to memory of 4776	1800	octosint.exe	105
PID 1800 wrote to memory of 948	1800	octosint.exe	112
PID 1800 wrote to memory of 948	1800	octosint.exe	112
PID 948 wrote to memory of 1848	948	cmd.exe	114
PID 948 wrote to memory of 1848	948	cmd.exe	114

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3232	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:1800
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1404
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\octosint.exe"
  2⤵
  - Views/modifies file attributes
  PID:3232
- 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:3168
- 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:3632
- 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:5080
- 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:2332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4220
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4876
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3136
- 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:4672
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4776
- 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:948
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1848

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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
948B

MD5
a5c47887aa6c4cf0b974838c5cef04ad

SHA1
f78ab9e48c500ca9df0b914ff987d8f9f1f4c79e

SHA256
60eb0522f7e65179b75c555fe7ab2fd3d698c93e028d554fa2fb44d5d6a42814

SHA512
3333997e75acf1e5e60028443ad94925713a824273a89353a347a5371f1e00733ca425d305fb50653496a71e72e6afee64e04b37c8bbfc2f4de99a9a6d98696e

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
d4e532cfa885cd7b7abee2caa08f0388

SHA1
dd3b80e4b56522e2ee2ec7877f18a1b044c0c47f

SHA256
811bffe99001ffee8acf0932d5a6d7dafa09094d00741623406b11fcaabea665

SHA512
2129fe057424835bc45de848e8191ddf8b8d2fdd242a2924653d4e073988d7fced6def199d4264fee6dcd3b20d6db3b14432e23e60756b93671262f3dc9d104a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0fbu4n0l.ovp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1800-73-0x0000028BBB4A0000-0x0000028BBB4B2000-memory.dmp

Filesize
72KB

Download
memory/1800-35-0x0000028BBA5D0000-0x0000028BBA5EE000-memory.dmp

Filesize
120KB

Download
memory/1800-94-0x00007FFC6E590000-0x00007FFC6F051000-memory.dmp

Filesize
10.8MB

Download
memory/1800-89-0x00007FFC6E593000-0x00007FFC6E595000-memory.dmp

Filesize
8KB

Download
memory/1800-2-0x00007FFC6E590000-0x00007FFC6F051000-memory.dmp

Filesize
10.8MB

Download
memory/1800-33-0x0000028BBA610000-0x0000028BBA686000-memory.dmp

Filesize
472KB

Download
memory/1800-34-0x0000028BBA690000-0x0000028BBA6E0000-memory.dmp

Filesize
320KB

Download
memory/1800-72-0x0000028BBA5B0000-0x0000028BBA5BA000-memory.dmp

Filesize
40KB

Download
memory/1800-0-0x00007FFC6E593000-0x00007FFC6E595000-memory.dmp

Filesize
8KB

Download
memory/1800-1-0x0000028B9FE60000-0x0000028B9FF04000-memory.dmp

Filesize
656KB

Download
memory/3168-4-0x00007FFC6E590000-0x00007FFC6F051000-memory.dmp

Filesize
10.8MB

Download
memory/3168-11-0x000002A3EFE20000-0x000002A3EFE42000-memory.dmp

Filesize
136KB

Download
memory/3168-5-0x00007FFC6E590000-0x00007FFC6F051000-memory.dmp

Filesize
10.8MB

Download
memory/3168-3-0x00007FFC6E590000-0x00007FFC6F051000-memory.dmp

Filesize
10.8MB

Download
memory/3168-18-0x00007FFC6E590000-0x00007FFC6F051000-memory.dmp

Filesize
10.8MB

Download