umbral | bf59201502504351baacaa124496df5d010b90c828c10a3413c9d40409f30ec9

Resubmissions

03-12-2024 22:42

241203-2mzjgsxrgt 10

30-11-2024 22:10

241130-13blxsxjby 10

Analysis

max time kernel
93s
max time network
148s
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 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
behavioral2/memory/1596-1-0x0000024718A20000-0x0000024718AC4000-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
4844	powershell.exe
2184	powershell.exe
1104	powershell.exe
388	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	osintbeta.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
8	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
2516	cmd.exe
4452	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2616	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4452	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1596	osintbeta.exe
4844	powershell.exe
4844	powershell.exe
2184	powershell.exe
2184	powershell.exe
1104	powershell.exe
1104	powershell.exe
3668	powershell.exe
3668	powershell.exe
388	powershell.exe
388	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1596	osintbeta.exe
Token: SeIncreaseQuotaPrivilege	2040	wmic.exe
Token: SeSecurityPrivilege	2040	wmic.exe
Token: SeTakeOwnershipPrivilege	2040	wmic.exe
Token: SeLoadDriverPrivilege	2040	wmic.exe
Token: SeSystemProfilePrivilege	2040	wmic.exe
Token: SeSystemtimePrivilege	2040	wmic.exe
Token: SeProfSingleProcessPrivilege	2040	wmic.exe
Token: SeIncBasePriorityPrivilege	2040	wmic.exe
Token: SeCreatePagefilePrivilege	2040	wmic.exe
Token: SeBackupPrivilege	2040	wmic.exe
Token: SeRestorePrivilege	2040	wmic.exe
Token: SeShutdownPrivilege	2040	wmic.exe
Token: SeDebugPrivilege	2040	wmic.exe
Token: SeSystemEnvironmentPrivilege	2040	wmic.exe
Token: SeRemoteShutdownPrivilege	2040	wmic.exe
Token: SeUndockPrivilege	2040	wmic.exe
Token: SeManageVolumePrivilege	2040	wmic.exe
Token: 33	2040	wmic.exe
Token: 34	2040	wmic.exe
Token: 35	2040	wmic.exe
Token: 36	2040	wmic.exe
Token: SeIncreaseQuotaPrivilege	2040	wmic.exe
Token: SeSecurityPrivilege	2040	wmic.exe
Token: SeTakeOwnershipPrivilege	2040	wmic.exe
Token: SeLoadDriverPrivilege	2040	wmic.exe
Token: SeSystemProfilePrivilege	2040	wmic.exe
Token: SeSystemtimePrivilege	2040	wmic.exe
Token: SeProfSingleProcessPrivilege	2040	wmic.exe
Token: SeIncBasePriorityPrivilege	2040	wmic.exe
Token: SeCreatePagefilePrivilege	2040	wmic.exe
Token: SeBackupPrivilege	2040	wmic.exe
Token: SeRestorePrivilege	2040	wmic.exe
Token: SeShutdownPrivilege	2040	wmic.exe
Token: SeDebugPrivilege	2040	wmic.exe
Token: SeSystemEnvironmentPrivilege	2040	wmic.exe
Token: SeRemoteShutdownPrivilege	2040	wmic.exe
Token: SeUndockPrivilege	2040	wmic.exe
Token: SeManageVolumePrivilege	2040	wmic.exe
Token: 33	2040	wmic.exe
Token: 34	2040	wmic.exe
Token: 35	2040	wmic.exe
Token: 36	2040	wmic.exe
Token: SeDebugPrivilege	4844	powershell.exe
Token: SeDebugPrivilege	2184	powershell.exe
Token: SeDebugPrivilege	1104	powershell.exe
Token: SeDebugPrivilege	3668	powershell.exe
Token: SeIncreaseQuotaPrivilege	920	wmic.exe
Token: SeSecurityPrivilege	920	wmic.exe
Token: SeTakeOwnershipPrivilege	920	wmic.exe
Token: SeLoadDriverPrivilege	920	wmic.exe
Token: SeSystemProfilePrivilege	920	wmic.exe
Token: SeSystemtimePrivilege	920	wmic.exe
Token: SeProfSingleProcessPrivilege	920	wmic.exe
Token: SeIncBasePriorityPrivilege	920	wmic.exe
Token: SeCreatePagefilePrivilege	920	wmic.exe
Token: SeBackupPrivilege	920	wmic.exe
Token: SeRestorePrivilege	920	wmic.exe
Token: SeShutdownPrivilege	920	wmic.exe
Token: SeDebugPrivilege	920	wmic.exe
Token: SeSystemEnvironmentPrivilege	920	wmic.exe
Token: SeRemoteShutdownPrivilege	920	wmic.exe
Token: SeUndockPrivilege	920	wmic.exe
Token: SeManageVolumePrivilege	920	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1596 wrote to memory of 2040	1596	osintbeta.exe	82
PID 1596 wrote to memory of 2040	1596	osintbeta.exe	82
PID 1596 wrote to memory of 4516	1596	osintbeta.exe	85
PID 1596 wrote to memory of 4516	1596	osintbeta.exe	85
PID 1596 wrote to memory of 4844	1596	osintbeta.exe	87
PID 1596 wrote to memory of 4844	1596	osintbeta.exe	87
PID 1596 wrote to memory of 2184	1596	osintbeta.exe	89
PID 1596 wrote to memory of 2184	1596	osintbeta.exe	89
PID 1596 wrote to memory of 1104	1596	osintbeta.exe	91
PID 1596 wrote to memory of 1104	1596	osintbeta.exe	91
PID 1596 wrote to memory of 3668	1596	osintbeta.exe	93
PID 1596 wrote to memory of 3668	1596	osintbeta.exe	93
PID 1596 wrote to memory of 920	1596	osintbeta.exe	95
PID 1596 wrote to memory of 920	1596	osintbeta.exe	95
PID 1596 wrote to memory of 1156	1596	osintbeta.exe	97
PID 1596 wrote to memory of 1156	1596	osintbeta.exe	97
PID 1596 wrote to memory of 3260	1596	osintbeta.exe	99
PID 1596 wrote to memory of 3260	1596	osintbeta.exe	99
PID 1596 wrote to memory of 388	1596	osintbeta.exe	101
PID 1596 wrote to memory of 388	1596	osintbeta.exe	101
PID 1596 wrote to memory of 2616	1596	osintbeta.exe	103
PID 1596 wrote to memory of 2616	1596	osintbeta.exe	103
PID 1596 wrote to memory of 2516	1596	osintbeta.exe	105
PID 1596 wrote to memory of 2516	1596	osintbeta.exe	105
PID 2516 wrote to memory of 4452	2516	cmd.exe	107
PID 2516 wrote to memory of 4452	2516	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4516	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:1596
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2040
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\osintbeta.exe"
  2⤵
  - Views/modifies file attributes
  PID:4516
- 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:4844
- 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:2184
- 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:1104
- 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:3668
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1156
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3260
- 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:388
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2616
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\osintbeta.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2516
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4452

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
47aec0ae6e0dfab5f91c35cd65d2c56a

SHA1
0bbe13618bdc0c402539cdfca81471aa501f5cad

SHA256
8f31385012b247db2cc50ecb164208fbbf5f8cdf7bfc951e8c2c8ad5fb04cf0b

SHA512
c4b7184a85c1d594012ba86390e651439d6cae63c76b94432faaaea410e4ef9bc62d88e68adf8f3abbe36e18ef9e4dc46c3e31a0d72089f98a22f04c8b4a8f12

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
369b89e3801fb1c3df3a7527516edea6

SHA1
1dcf07320cbe1911d7138f4287b20e90e8f2bc25

SHA256
18b86f2340bc1547cc647693777444a0788551baee5989b0f8b186b8109f291c

SHA512
c819d002f42629c97a26f4e81c10a4c8a6b20a4bbfa269306675badaa7828740b80fe6c31945fc6f4c06ad812c1f04c6cc37ac62cb59ed9c0af22a819b259d87

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4mc1mvrb.u3j.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1596-0-0x00007FFD99B73000-0x00007FFD99B75000-memory.dmp

Filesize
8KB

Download
memory/1596-2-0x00007FFD99B70000-0x00007FFD9A631000-memory.dmp

Filesize
10.8MB

Download
memory/1596-1-0x0000024718A20000-0x0000024718AC4000-memory.dmp

Filesize
656KB

Download
memory/1596-31-0x0000024732FA0000-0x0000024733016000-memory.dmp

Filesize
472KB

Download
memory/1596-32-0x0000024733020000-0x0000024733070000-memory.dmp

Filesize
320KB

Download
memory/1596-33-0x000002471A820000-0x000002471A83E000-memory.dmp

Filesize
120KB

Download
memory/1596-70-0x000002471A890000-0x000002471A89A000-memory.dmp

Filesize
40KB

Download
memory/1596-71-0x0000024733070000-0x0000024733082000-memory.dmp

Filesize
72KB

Download
memory/1596-91-0x00007FFD99B70000-0x00007FFD9A631000-memory.dmp

Filesize
10.8MB

Download
memory/4844-3-0x00007FFD99B70000-0x00007FFD9A631000-memory.dmp

Filesize
10.8MB

Download
memory/4844-16-0x00007FFD99B70000-0x00007FFD9A631000-memory.dmp

Filesize
10.8MB

Download
memory/4844-9-0x0000023892A40000-0x0000023892A62000-memory.dmp

Filesize
136KB

Download