umbral | f6978810fc08e07982be2acda6f8692bca7011119e15088fcb2ab006de8dece7

Analysis

max time kernel
430s
max time network
434s
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 10:10

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General

Target

octosint.exe
Size

631KB
MD5

3fbddef1a1957c47cc788a7ea3be9bf1
SHA1

5d68695893be73ad26a1b6115ac38a3e72e11cbf
SHA256

f6978810fc08e07982be2acda6f8692bca7011119e15088fcb2ab006de8dece7
SHA512

76cb0b768c15464ae4dc41d90909a1c740de8e2b3f7b8d37f255068e5a0bd0c6d666e68fcfec47f6cca268de5cf24bc2a85800fb3fe3244fe25b60b8f17c5e54
SSDEEP

12288:5oZtL+EP8gGVK9rI8j967NokRRC9iMdRC:XI8LVK9rI8j967NokRRsiMdA

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2620-1-0x0000026E1F050000-0x0000026E1F0F4000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3972	powershell.exe
224	powershell.exe
1820	powershell.exe
2440	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
18	discord.com
19	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
6	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
2384	cmd.exe
4460	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4348	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4460	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2620	octosint.exe
2440	powershell.exe
2440	powershell.exe
224	powershell.exe
224	powershell.exe
1820	powershell.exe
1820	powershell.exe
4520	powershell.exe
4520	powershell.exe
3972	powershell.exe
3972	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2620	octosint.exe
Token: SeIncreaseQuotaPrivilege	3720	wmic.exe
Token: SeSecurityPrivilege	3720	wmic.exe
Token: SeTakeOwnershipPrivilege	3720	wmic.exe
Token: SeLoadDriverPrivilege	3720	wmic.exe
Token: SeSystemProfilePrivilege	3720	wmic.exe
Token: SeSystemtimePrivilege	3720	wmic.exe
Token: SeProfSingleProcessPrivilege	3720	wmic.exe
Token: SeIncBasePriorityPrivilege	3720	wmic.exe
Token: SeCreatePagefilePrivilege	3720	wmic.exe
Token: SeBackupPrivilege	3720	wmic.exe
Token: SeRestorePrivilege	3720	wmic.exe
Token: SeShutdownPrivilege	3720	wmic.exe
Token: SeDebugPrivilege	3720	wmic.exe
Token: SeSystemEnvironmentPrivilege	3720	wmic.exe
Token: SeRemoteShutdownPrivilege	3720	wmic.exe
Token: SeUndockPrivilege	3720	wmic.exe
Token: SeManageVolumePrivilege	3720	wmic.exe
Token: 33	3720	wmic.exe
Token: 34	3720	wmic.exe
Token: 35	3720	wmic.exe
Token: 36	3720	wmic.exe
Token: SeIncreaseQuotaPrivilege	3720	wmic.exe
Token: SeSecurityPrivilege	3720	wmic.exe
Token: SeTakeOwnershipPrivilege	3720	wmic.exe
Token: SeLoadDriverPrivilege	3720	wmic.exe
Token: SeSystemProfilePrivilege	3720	wmic.exe
Token: SeSystemtimePrivilege	3720	wmic.exe
Token: SeProfSingleProcessPrivilege	3720	wmic.exe
Token: SeIncBasePriorityPrivilege	3720	wmic.exe
Token: SeCreatePagefilePrivilege	3720	wmic.exe
Token: SeBackupPrivilege	3720	wmic.exe
Token: SeRestorePrivilege	3720	wmic.exe
Token: SeShutdownPrivilege	3720	wmic.exe
Token: SeDebugPrivilege	3720	wmic.exe
Token: SeSystemEnvironmentPrivilege	3720	wmic.exe
Token: SeRemoteShutdownPrivilege	3720	wmic.exe
Token: SeUndockPrivilege	3720	wmic.exe
Token: SeManageVolumePrivilege	3720	wmic.exe
Token: 33	3720	wmic.exe
Token: 34	3720	wmic.exe
Token: 35	3720	wmic.exe
Token: 36	3720	wmic.exe
Token: SeDebugPrivilege	2440	powershell.exe
Token: SeDebugPrivilege	224	powershell.exe
Token: SeDebugPrivilege	1820	powershell.exe
Token: SeDebugPrivilege	4520	powershell.exe
Token: SeIncreaseQuotaPrivilege	344	wmic.exe
Token: SeSecurityPrivilege	344	wmic.exe
Token: SeTakeOwnershipPrivilege	344	wmic.exe
Token: SeLoadDriverPrivilege	344	wmic.exe
Token: SeSystemProfilePrivilege	344	wmic.exe
Token: SeSystemtimePrivilege	344	wmic.exe
Token: SeProfSingleProcessPrivilege	344	wmic.exe
Token: SeIncBasePriorityPrivilege	344	wmic.exe
Token: SeCreatePagefilePrivilege	344	wmic.exe
Token: SeBackupPrivilege	344	wmic.exe
Token: SeRestorePrivilege	344	wmic.exe
Token: SeShutdownPrivilege	344	wmic.exe
Token: SeDebugPrivilege	344	wmic.exe
Token: SeSystemEnvironmentPrivilege	344	wmic.exe
Token: SeRemoteShutdownPrivilege	344	wmic.exe
Token: SeUndockPrivilege	344	wmic.exe
Token: SeManageVolumePrivilege	344	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2620 wrote to memory of 3720	2620	octosint.exe	82
PID 2620 wrote to memory of 3720	2620	octosint.exe	82
PID 2620 wrote to memory of 2156	2620	octosint.exe	85
PID 2620 wrote to memory of 2156	2620	octosint.exe	85
PID 2620 wrote to memory of 2440	2620	octosint.exe	87
PID 2620 wrote to memory of 2440	2620	octosint.exe	87
PID 2620 wrote to memory of 224	2620	octosint.exe	89
PID 2620 wrote to memory of 224	2620	octosint.exe	89
PID 2620 wrote to memory of 1820	2620	octosint.exe	91
PID 2620 wrote to memory of 1820	2620	octosint.exe	91
PID 2620 wrote to memory of 4520	2620	octosint.exe	93
PID 2620 wrote to memory of 4520	2620	octosint.exe	93
PID 2620 wrote to memory of 344	2620	octosint.exe	95
PID 2620 wrote to memory of 344	2620	octosint.exe	95
PID 2620 wrote to memory of 1576	2620	octosint.exe	97
PID 2620 wrote to memory of 1576	2620	octosint.exe	97
PID 2620 wrote to memory of 556	2620	octosint.exe	99
PID 2620 wrote to memory of 556	2620	octosint.exe	99
PID 2620 wrote to memory of 3972	2620	octosint.exe	101
PID 2620 wrote to memory of 3972	2620	octosint.exe	101
PID 2620 wrote to memory of 4348	2620	octosint.exe	103
PID 2620 wrote to memory of 4348	2620	octosint.exe	103
PID 2620 wrote to memory of 2384	2620	octosint.exe	105
PID 2620 wrote to memory of 2384	2620	octosint.exe	105
PID 2384 wrote to memory of 4460	2384	cmd.exe	107
PID 2384 wrote to memory of 4460	2384	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2156	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:2620
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3720
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\octosint.exe"
  2⤵
  - Views/modifies file attributes
  PID:2156
- 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:2440
- 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:224
- 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:1820
- 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:4520
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:344
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1576
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:556
- 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:3972
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4348
- 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:2384
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4460

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
af283a45e468abc28a9ac1c14af0a45d

SHA1
6d70a604e1a12e0df9b98a4bf57d335d78986c93

SHA256
141a5cbf854b091471384f71c93282c31d166a8676d43559c38086dd6e07229c

SHA512
05abb1f812dd979755e811928006974bccf076e8f618061e64db35b129bb78175a99bac6eefa5e11f6f3c4af94f60e9b7da4c4ba07fa740748ff47a4511d4db8

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

Filesize
1KB

MD5
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

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

Filesize
1KB

MD5
369b89e3801fb1c3df3a7527516edea6

SHA1
1dcf07320cbe1911d7138f4287b20e90e8f2bc25

SHA256
18b86f2340bc1547cc647693777444a0788551baee5989b0f8b186b8109f291c

SHA512
c819d002f42629c97a26f4e81c10a4c8a6b20a4bbfa269306675badaa7828740b80fe6c31945fc6f4c06ad812c1f04c6cc37ac62cb59ed9c0af22a819b259d87

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_rg3bopep.0po.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2440-4-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/2440-5-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/2440-11-0x0000020247C20000-0x0000020247C42000-memory.dmp

Filesize
136KB

Download
memory/2440-18-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/2440-3-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/2620-34-0x0000026E397A0000-0x0000026E397F0000-memory.dmp

Filesize
320KB

Download
memory/2620-33-0x0000026E39820000-0x0000026E39896000-memory.dmp

Filesize
472KB

Download
memory/2620-35-0x0000026E39650000-0x0000026E3966E000-memory.dmp

Filesize
120KB

Download
memory/2620-1-0x0000026E1F050000-0x0000026E1F0F4000-memory.dmp

Filesize
656KB

Download
memory/2620-0-0x00007FF857523000-0x00007FF857525000-memory.dmp

Filesize
8KB

Download
memory/2620-72-0x0000026E397F0000-0x0000026E397FA000-memory.dmp

Filesize
40KB

Download
memory/2620-73-0x0000026E399C0000-0x0000026E399D2000-memory.dmp

Filesize
72KB

Download
memory/2620-2-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download
memory/2620-93-0x00007FF857520000-0x00007FF857FE1000-memory.dmp

Filesize
10.8MB

Download