umbral | b9dbdd3444445ce02cab79fc62117bf55a61eb921228150e11ed540cf1fcd4e0

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
28-11-2024 08:05

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General

Target

cybersec multitool.exe
Size

631KB
MD5

ceba758a677d70ead7359cec602a5dc0
SHA1

83e7109b9d529f807847c4e3c9ec6605cf757b2b
SHA256

0a79c67164df6d37a52e9857beee53f0ad4603a2cd29ead90adbc165fb8382f1
SHA512

8f78ab86f4bfa517ec066c9993f96c1b7971f9ceacc5659ea312ae8e6df8c0ee4dae6f6fdb15c7387e1af77a6faee1d580907f1364d067f0abe697b40bd6c5c6
SSDEEP

12288:hoZtL+EP8hWqaVjgULeyD1Ac5LvNiMdRC:fI8UqaVjgULeyD1Ac5LFiMdA

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral7/memory/4848-1-0x0000015BE3C80000-0x0000015BE3D24000-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
3908	powershell.exe
3628	powershell.exe
3560	powershell.exe
3564	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	cybersec multitool.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
23	discord.com
24	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
7	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
3684	cmd.exe
2216	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2540	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2216	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4848	cybersec multitool.exe
3908	powershell.exe
3908	powershell.exe
3628	powershell.exe
3628	powershell.exe
3560	powershell.exe
3560	powershell.exe
3100	powershell.exe
3100	powershell.exe
3564	powershell.exe
3564	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4848	cybersec multitool.exe
Token: SeIncreaseQuotaPrivilege	4908	wmic.exe
Token: SeSecurityPrivilege	4908	wmic.exe
Token: SeTakeOwnershipPrivilege	4908	wmic.exe
Token: SeLoadDriverPrivilege	4908	wmic.exe
Token: SeSystemProfilePrivilege	4908	wmic.exe
Token: SeSystemtimePrivilege	4908	wmic.exe
Token: SeProfSingleProcessPrivilege	4908	wmic.exe
Token: SeIncBasePriorityPrivilege	4908	wmic.exe
Token: SeCreatePagefilePrivilege	4908	wmic.exe
Token: SeBackupPrivilege	4908	wmic.exe
Token: SeRestorePrivilege	4908	wmic.exe
Token: SeShutdownPrivilege	4908	wmic.exe
Token: SeDebugPrivilege	4908	wmic.exe
Token: SeSystemEnvironmentPrivilege	4908	wmic.exe
Token: SeRemoteShutdownPrivilege	4908	wmic.exe
Token: SeUndockPrivilege	4908	wmic.exe
Token: SeManageVolumePrivilege	4908	wmic.exe
Token: 33	4908	wmic.exe
Token: 34	4908	wmic.exe
Token: 35	4908	wmic.exe
Token: 36	4908	wmic.exe
Token: SeIncreaseQuotaPrivilege	4908	wmic.exe
Token: SeSecurityPrivilege	4908	wmic.exe
Token: SeTakeOwnershipPrivilege	4908	wmic.exe
Token: SeLoadDriverPrivilege	4908	wmic.exe
Token: SeSystemProfilePrivilege	4908	wmic.exe
Token: SeSystemtimePrivilege	4908	wmic.exe
Token: SeProfSingleProcessPrivilege	4908	wmic.exe
Token: SeIncBasePriorityPrivilege	4908	wmic.exe
Token: SeCreatePagefilePrivilege	4908	wmic.exe
Token: SeBackupPrivilege	4908	wmic.exe
Token: SeRestorePrivilege	4908	wmic.exe
Token: SeShutdownPrivilege	4908	wmic.exe
Token: SeDebugPrivilege	4908	wmic.exe
Token: SeSystemEnvironmentPrivilege	4908	wmic.exe
Token: SeRemoteShutdownPrivilege	4908	wmic.exe
Token: SeUndockPrivilege	4908	wmic.exe
Token: SeManageVolumePrivilege	4908	wmic.exe
Token: 33	4908	wmic.exe
Token: 34	4908	wmic.exe
Token: 35	4908	wmic.exe
Token: 36	4908	wmic.exe
Token: SeDebugPrivilege	3908	powershell.exe
Token: SeDebugPrivilege	3628	powershell.exe
Token: SeDebugPrivilege	3560	powershell.exe
Token: SeDebugPrivilege	3100	powershell.exe
Token: SeIncreaseQuotaPrivilege	4432	wmic.exe
Token: SeSecurityPrivilege	4432	wmic.exe
Token: SeTakeOwnershipPrivilege	4432	wmic.exe
Token: SeLoadDriverPrivilege	4432	wmic.exe
Token: SeSystemProfilePrivilege	4432	wmic.exe
Token: SeSystemtimePrivilege	4432	wmic.exe
Token: SeProfSingleProcessPrivilege	4432	wmic.exe
Token: SeIncBasePriorityPrivilege	4432	wmic.exe
Token: SeCreatePagefilePrivilege	4432	wmic.exe
Token: SeBackupPrivilege	4432	wmic.exe
Token: SeRestorePrivilege	4432	wmic.exe
Token: SeShutdownPrivilege	4432	wmic.exe
Token: SeDebugPrivilege	4432	wmic.exe
Token: SeSystemEnvironmentPrivilege	4432	wmic.exe
Token: SeRemoteShutdownPrivilege	4432	wmic.exe
Token: SeUndockPrivilege	4432	wmic.exe
Token: SeManageVolumePrivilege	4432	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4848 wrote to memory of 4908	4848	cybersec multitool.exe	82
PID 4848 wrote to memory of 4908	4848	cybersec multitool.exe	82
PID 4848 wrote to memory of 3496	4848	cybersec multitool.exe	85
PID 4848 wrote to memory of 3496	4848	cybersec multitool.exe	85
PID 4848 wrote to memory of 3908	4848	cybersec multitool.exe	87
PID 4848 wrote to memory of 3908	4848	cybersec multitool.exe	87
PID 4848 wrote to memory of 3628	4848	cybersec multitool.exe	89
PID 4848 wrote to memory of 3628	4848	cybersec multitool.exe	89
PID 4848 wrote to memory of 3560	4848	cybersec multitool.exe	91
PID 4848 wrote to memory of 3560	4848	cybersec multitool.exe	91
PID 4848 wrote to memory of 3100	4848	cybersec multitool.exe	93
PID 4848 wrote to memory of 3100	4848	cybersec multitool.exe	93
PID 4848 wrote to memory of 4432	4848	cybersec multitool.exe	95
PID 4848 wrote to memory of 4432	4848	cybersec multitool.exe	95
PID 4848 wrote to memory of 3720	4848	cybersec multitool.exe	97
PID 4848 wrote to memory of 3720	4848	cybersec multitool.exe	97
PID 4848 wrote to memory of 3964	4848	cybersec multitool.exe	99
PID 4848 wrote to memory of 3964	4848	cybersec multitool.exe	99
PID 4848 wrote to memory of 3564	4848	cybersec multitool.exe	101
PID 4848 wrote to memory of 3564	4848	cybersec multitool.exe	101
PID 4848 wrote to memory of 2540	4848	cybersec multitool.exe	103
PID 4848 wrote to memory of 2540	4848	cybersec multitool.exe	103
PID 4848 wrote to memory of 3684	4848	cybersec multitool.exe	108
PID 4848 wrote to memory of 3684	4848	cybersec multitool.exe	108
PID 3684 wrote to memory of 2216	3684	cmd.exe	110
PID 3684 wrote to memory of 2216	3684	cmd.exe	110

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3496	attrib.exe

C:\Users\Admin\AppData\Local\Temp\cybersec multitool.exe
"C:\Users\Admin\AppData\Local\Temp\cybersec multitool.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4848
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4908
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\cybersec multitool.exe"
  2⤵
  - Views/modifies file attributes
  PID:3496
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\cybersec multitool.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3908
- 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:3628
- 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:3560
- 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:3100
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4432
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3720
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3964
- 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:3564
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2540
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\cybersec multitool.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3684
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2216

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
b0dc7c3718882fe730dbbc1b681bfc49

SHA1
03a9c793855b3fc4a82d48a70841ab547cfb9943

SHA256
05b199d4f0d7025646593db4f3d2a22a44e4e64438668d34ec6a3a31afe249bb

SHA512
c927720f5387ba226136b57bce9fb7f37917478d42a466aa9b175561bb5aae6837f82b3b45a3b285460cecffd40742302ce607c58dea83b8a8704eef783c9601

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
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gbkv4452.ovc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3908-3-0x000002D940180000-0x000002D9401A2000-memory.dmp

Filesize
136KB

Download
memory/3908-14-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/3908-15-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/3908-18-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/3908-4-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/4848-34-0x0000015BFE4A0000-0x0000015BFE4F0000-memory.dmp

Filesize
320KB

Download
memory/4848-33-0x0000015BFE420000-0x0000015BFE496000-memory.dmp

Filesize
472KB

Download
memory/4848-35-0x0000015BFE3C0000-0x0000015BFE3DE000-memory.dmp

Filesize
120KB

Download
memory/4848-1-0x0000015BE3C80000-0x0000015BE3D24000-memory.dmp

Filesize
656KB

Download
memory/4848-0-0x00007FFFCD2F3000-0x00007FFFCD2F5000-memory.dmp

Filesize
8KB

Download
memory/4848-73-0x0000015BFE4F0000-0x0000015BFE502000-memory.dmp

Filesize
72KB

Download
memory/4848-72-0x0000015BFE3E0000-0x0000015BFE3EA000-memory.dmp

Filesize
40KB

Download
memory/4848-2-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download
memory/4848-93-0x00007FFFCD2F0000-0x00007FFFCDDB1000-memory.dmp

Filesize
10.8MB

Download