umbral | f6978810fc08e07982be2acda6f8692bca7011119e15088fcb2ab006de8dece7

Analysis

max time kernel
96s
max time network
137s
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 09:41

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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
behavioral2/memory/2208-1-0x000002045FE60000-0x000002045FF04000-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
1528	powershell.exe
3332	powershell.exe
3228	powershell.exe
4200	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
20	discord.com
21	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
5	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
1044	cmd.exe
2888	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1064	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2888	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2208	octosint.exe
4200	powershell.exe
4200	powershell.exe
1528	powershell.exe
1528	powershell.exe
3332	powershell.exe
3332	powershell.exe
2196	powershell.exe
2196	powershell.exe
3228	powershell.exe
3228	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2208	octosint.exe
Token: SeIncreaseQuotaPrivilege	2236	wmic.exe
Token: SeSecurityPrivilege	2236	wmic.exe
Token: SeTakeOwnershipPrivilege	2236	wmic.exe
Token: SeLoadDriverPrivilege	2236	wmic.exe
Token: SeSystemProfilePrivilege	2236	wmic.exe
Token: SeSystemtimePrivilege	2236	wmic.exe
Token: SeProfSingleProcessPrivilege	2236	wmic.exe
Token: SeIncBasePriorityPrivilege	2236	wmic.exe
Token: SeCreatePagefilePrivilege	2236	wmic.exe
Token: SeBackupPrivilege	2236	wmic.exe
Token: SeRestorePrivilege	2236	wmic.exe
Token: SeShutdownPrivilege	2236	wmic.exe
Token: SeDebugPrivilege	2236	wmic.exe
Token: SeSystemEnvironmentPrivilege	2236	wmic.exe
Token: SeRemoteShutdownPrivilege	2236	wmic.exe
Token: SeUndockPrivilege	2236	wmic.exe
Token: SeManageVolumePrivilege	2236	wmic.exe
Token: 33	2236	wmic.exe
Token: 34	2236	wmic.exe
Token: 35	2236	wmic.exe
Token: 36	2236	wmic.exe
Token: SeIncreaseQuotaPrivilege	2236	wmic.exe
Token: SeSecurityPrivilege	2236	wmic.exe
Token: SeTakeOwnershipPrivilege	2236	wmic.exe
Token: SeLoadDriverPrivilege	2236	wmic.exe
Token: SeSystemProfilePrivilege	2236	wmic.exe
Token: SeSystemtimePrivilege	2236	wmic.exe
Token: SeProfSingleProcessPrivilege	2236	wmic.exe
Token: SeIncBasePriorityPrivilege	2236	wmic.exe
Token: SeCreatePagefilePrivilege	2236	wmic.exe
Token: SeBackupPrivilege	2236	wmic.exe
Token: SeRestorePrivilege	2236	wmic.exe
Token: SeShutdownPrivilege	2236	wmic.exe
Token: SeDebugPrivilege	2236	wmic.exe
Token: SeSystemEnvironmentPrivilege	2236	wmic.exe
Token: SeRemoteShutdownPrivilege	2236	wmic.exe
Token: SeUndockPrivilege	2236	wmic.exe
Token: SeManageVolumePrivilege	2236	wmic.exe
Token: 33	2236	wmic.exe
Token: 34	2236	wmic.exe
Token: 35	2236	wmic.exe
Token: 36	2236	wmic.exe
Token: SeDebugPrivilege	4200	powershell.exe
Token: SeDebugPrivilege	1528	powershell.exe
Token: SeDebugPrivilege	3332	powershell.exe
Token: SeDebugPrivilege	2196	powershell.exe
Token: SeIncreaseQuotaPrivilege	2156	wmic.exe
Token: SeSecurityPrivilege	2156	wmic.exe
Token: SeTakeOwnershipPrivilege	2156	wmic.exe
Token: SeLoadDriverPrivilege	2156	wmic.exe
Token: SeSystemProfilePrivilege	2156	wmic.exe
Token: SeSystemtimePrivilege	2156	wmic.exe
Token: SeProfSingleProcessPrivilege	2156	wmic.exe
Token: SeIncBasePriorityPrivilege	2156	wmic.exe
Token: SeCreatePagefilePrivilege	2156	wmic.exe
Token: SeBackupPrivilege	2156	wmic.exe
Token: SeRestorePrivilege	2156	wmic.exe
Token: SeShutdownPrivilege	2156	wmic.exe
Token: SeDebugPrivilege	2156	wmic.exe
Token: SeSystemEnvironmentPrivilege	2156	wmic.exe
Token: SeRemoteShutdownPrivilege	2156	wmic.exe
Token: SeUndockPrivilege	2156	wmic.exe
Token: SeManageVolumePrivilege	2156	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 2236	2208	octosint.exe	82
PID 2208 wrote to memory of 2236	2208	octosint.exe	82
PID 2208 wrote to memory of 3308	2208	octosint.exe	85
PID 2208 wrote to memory of 3308	2208	octosint.exe	85
PID 2208 wrote to memory of 4200	2208	octosint.exe	87
PID 2208 wrote to memory of 4200	2208	octosint.exe	87
PID 2208 wrote to memory of 1528	2208	octosint.exe	89
PID 2208 wrote to memory of 1528	2208	octosint.exe	89
PID 2208 wrote to memory of 3332	2208	octosint.exe	91
PID 2208 wrote to memory of 3332	2208	octosint.exe	91
PID 2208 wrote to memory of 2196	2208	octosint.exe	93
PID 2208 wrote to memory of 2196	2208	octosint.exe	93
PID 2208 wrote to memory of 2156	2208	octosint.exe	95
PID 2208 wrote to memory of 2156	2208	octosint.exe	95
PID 2208 wrote to memory of 3816	2208	octosint.exe	97
PID 2208 wrote to memory of 3816	2208	octosint.exe	97
PID 2208 wrote to memory of 4864	2208	octosint.exe	99
PID 2208 wrote to memory of 4864	2208	octosint.exe	99
PID 2208 wrote to memory of 3228	2208	octosint.exe	101
PID 2208 wrote to memory of 3228	2208	octosint.exe	101
PID 2208 wrote to memory of 1064	2208	octosint.exe	103
PID 2208 wrote to memory of 1064	2208	octosint.exe	103
PID 2208 wrote to memory of 1044	2208	octosint.exe	105
PID 2208 wrote to memory of 1044	2208	octosint.exe	105
PID 1044 wrote to memory of 2888	1044	cmd.exe	107
PID 1044 wrote to memory of 2888	1044	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3308	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:2208
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2236
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\octosint.exe"
  2⤵
  - Views/modifies file attributes
  PID:3308
- 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:4200
- 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:1528
- 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:3332
- 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:2196
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2156
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3816
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4864
- 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:3228
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1064
- 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:1044
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2888

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
9390b66cebc6c006ad29783078ac920b

SHA1
a61c048a788c8821ac024811fa693d2259499cf5

SHA256
a749a95d2101f05dfc26c1045f2d7324e1a8f30c7a1e13eed18ab5f9c2b73d3e

SHA512
65c2658215753f5d6de2affbb93ab15a62d6d9106b79e4c049cdeb885d52332825aa2d62eeb4f0b312eee3a4f01ede6f9e2caa10e12b269fe81178d878cc4cf4

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

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
1KB

MD5
56b542f1ce46030f16d317e31e4c7a50

SHA1
007a94b17a78b8584fe6cfecdeaf476bdefcf7f9

SHA256
a4ca0c6358d00f4419c9785dbdab7ff1837131ebde04f1b6e8a0cc0678993551

SHA512
fdc4c46f90645a09360e2923c377ba068a408b7c381b99e28079a6249f0f1599db077a9edec15da57e989dfca9f8f7a12aa685edd53af446acdd53958aa08b08

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4svhevgh.s43.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1528-32-0x000002707CDC0000-0x000002707CFDC000-memory.dmp

Filesize
2.1MB

Download
memory/2208-37-0x000002047A5D0000-0x000002047A5EE000-memory.dmp

Filesize
120KB

Download
memory/2208-2-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/2208-95-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/2208-0-0x00007FFA2F173000-0x00007FFA2F175000-memory.dmp

Filesize
8KB

Download
memory/2208-75-0x000002047B4E0000-0x000002047B4F2000-memory.dmp

Filesize
72KB

Download
memory/2208-74-0x000002047A6E0000-0x000002047A6EA000-memory.dmp

Filesize
40KB

Download
memory/2208-35-0x000002047A600000-0x000002047A676000-memory.dmp

Filesize
472KB

Download
memory/2208-36-0x000002047A680000-0x000002047A6D0000-memory.dmp

Filesize
320KB

Download
memory/2208-1-0x000002045FE60000-0x000002045FF04000-memory.dmp

Filesize
656KB

Download
memory/4200-3-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/4200-18-0x000001CB7DC50000-0x000001CB7DE6C000-memory.dmp

Filesize
2.1MB

Download
memory/4200-4-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/4200-5-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download
memory/4200-11-0x000001CB7DAA0000-0x000001CB7DAC2000-memory.dmp

Filesize
136KB

Download
memory/4200-19-0x00007FFA2F170000-0x00007FFA2FC31000-memory.dmp

Filesize
10.8MB

Download