umbral | c2caa0fa4a868c131c9139635dd57f67ec1bba9283ab4b0a121fdff5a4a21082

Analysis

max time kernel
453s
max time network
1174s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
07-06-2024 19:25

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General

Target

TEST.exe
Size

229KB
MD5

9dc985d83754309760ae45747d8081c2
SHA1

b60e1c39ee8da20c5bdf1df501fab12fd45eaf50
SHA256

f3fdf0137c30af49a71a174e204795a0b96ef2a8a0a53fda4add34574f79005b
SHA512

d0908c5e493bd83cd58e73b715c9318cb6032bb388d7c6ffbdc75b4bb813e594153a57e2ecebbe0a2d1aa0513312be16886b08ad8b91fc590217838057a730cf
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD4hYBSGELnsmd42X3WVzb8e1mzi:voZtL+EP8hYBSGELnsmd42X3WtB

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/1376-1-0x0000025A91700000-0x0000025A91740000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4608	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	TEST.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
3	discord.com
5	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
3	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2108	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4608	powershell.exe
4608	powershell.exe
2500	powershell.exe
2500	powershell.exe
4056	powershell.exe
4056	powershell.exe
340	powershell.exe
340	powershell.exe
3124	powershell.exe
3124	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1376	TEST.exe
Token: SeDebugPrivilege	4608	powershell.exe
Token: SeDebugPrivilege	2500	powershell.exe
Token: SeDebugPrivilege	4056	powershell.exe
Token: SeDebugPrivilege	340	powershell.exe
Token: SeIncreaseQuotaPrivilege	4888	wmic.exe
Token: SeSecurityPrivilege	4888	wmic.exe
Token: SeTakeOwnershipPrivilege	4888	wmic.exe
Token: SeLoadDriverPrivilege	4888	wmic.exe
Token: SeSystemProfilePrivilege	4888	wmic.exe
Token: SeSystemtimePrivilege	4888	wmic.exe
Token: SeProfSingleProcessPrivilege	4888	wmic.exe
Token: SeIncBasePriorityPrivilege	4888	wmic.exe
Token: SeCreatePagefilePrivilege	4888	wmic.exe
Token: SeBackupPrivilege	4888	wmic.exe
Token: SeRestorePrivilege	4888	wmic.exe
Token: SeShutdownPrivilege	4888	wmic.exe
Token: SeDebugPrivilege	4888	wmic.exe
Token: SeSystemEnvironmentPrivilege	4888	wmic.exe
Token: SeRemoteShutdownPrivilege	4888	wmic.exe
Token: SeUndockPrivilege	4888	wmic.exe
Token: SeManageVolumePrivilege	4888	wmic.exe
Token: 33	4888	wmic.exe
Token: 34	4888	wmic.exe
Token: 35	4888	wmic.exe
Token: 36	4888	wmic.exe
Token: SeIncreaseQuotaPrivilege	4888	wmic.exe
Token: SeSecurityPrivilege	4888	wmic.exe
Token: SeTakeOwnershipPrivilege	4888	wmic.exe
Token: SeLoadDriverPrivilege	4888	wmic.exe
Token: SeSystemProfilePrivilege	4888	wmic.exe
Token: SeSystemtimePrivilege	4888	wmic.exe
Token: SeProfSingleProcessPrivilege	4888	wmic.exe
Token: SeIncBasePriorityPrivilege	4888	wmic.exe
Token: SeCreatePagefilePrivilege	4888	wmic.exe
Token: SeBackupPrivilege	4888	wmic.exe
Token: SeRestorePrivilege	4888	wmic.exe
Token: SeShutdownPrivilege	4888	wmic.exe
Token: SeDebugPrivilege	4888	wmic.exe
Token: SeSystemEnvironmentPrivilege	4888	wmic.exe
Token: SeRemoteShutdownPrivilege	4888	wmic.exe
Token: SeUndockPrivilege	4888	wmic.exe
Token: SeManageVolumePrivilege	4888	wmic.exe
Token: 33	4888	wmic.exe
Token: 34	4888	wmic.exe
Token: 35	4888	wmic.exe
Token: 36	4888	wmic.exe
Token: SeIncreaseQuotaPrivilege	1480	wmic.exe
Token: SeSecurityPrivilege	1480	wmic.exe
Token: SeTakeOwnershipPrivilege	1480	wmic.exe
Token: SeLoadDriverPrivilege	1480	wmic.exe
Token: SeSystemProfilePrivilege	1480	wmic.exe
Token: SeSystemtimePrivilege	1480	wmic.exe
Token: SeProfSingleProcessPrivilege	1480	wmic.exe
Token: SeIncBasePriorityPrivilege	1480	wmic.exe
Token: SeCreatePagefilePrivilege	1480	wmic.exe
Token: SeBackupPrivilege	1480	wmic.exe
Token: SeRestorePrivilege	1480	wmic.exe
Token: SeShutdownPrivilege	1480	wmic.exe
Token: SeDebugPrivilege	1480	wmic.exe
Token: SeSystemEnvironmentPrivilege	1480	wmic.exe
Token: SeRemoteShutdownPrivilege	1480	wmic.exe
Token: SeUndockPrivilege	1480	wmic.exe
Token: SeManageVolumePrivilege	1480	wmic.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1376 wrote to memory of 4608	1376	TEST.exe	76
PID 1376 wrote to memory of 4608	1376	TEST.exe	76
PID 1376 wrote to memory of 2500	1376	TEST.exe	78
PID 1376 wrote to memory of 2500	1376	TEST.exe	78
PID 1376 wrote to memory of 4056	1376	TEST.exe	80
PID 1376 wrote to memory of 4056	1376	TEST.exe	80
PID 1376 wrote to memory of 340	1376	TEST.exe	82
PID 1376 wrote to memory of 340	1376	TEST.exe	82
PID 1376 wrote to memory of 4888	1376	TEST.exe	84
PID 1376 wrote to memory of 4888	1376	TEST.exe	84
PID 1376 wrote to memory of 1480	1376	TEST.exe	87
PID 1376 wrote to memory of 1480	1376	TEST.exe	87
PID 1376 wrote to memory of 4684	1376	TEST.exe	89
PID 1376 wrote to memory of 4684	1376	TEST.exe	89
PID 1376 wrote to memory of 3124	1376	TEST.exe	91
PID 1376 wrote to memory of 3124	1376	TEST.exe	91
PID 1376 wrote to memory of 2108	1376	TEST.exe	93
PID 1376 wrote to memory of 2108	1376	TEST.exe	93

C:\Users\Admin\AppData\Local\Temp\TEST.exe
"C:\Users\Admin\AppData\Local\Temp\TEST.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1376
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\TEST.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4608
- 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:2500
- 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:4056
- 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:340
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4888
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4684
- 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:3124
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2108

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

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
e3840d9bcedfe7017e49ee5d05bd1c46

SHA1
272620fb2605bd196df471d62db4b2d280a363c6

SHA256
3ac83e70415b9701ee71a4560232d7998e00c3db020fde669eb01b8821d2746f

SHA512
76adc88ab3930acc6b8b7668e2de797b8c00edcfc41660ee4485259c72a8adf162db62c2621ead5a9950f12bfe8a76ccab79d02fda11860afb0e217812cac376

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

Filesize
948B

MD5
fa21dd50b4e64421076f843031c8ccf7

SHA1
2c56e94f130c0d8d77116e939ffee4e37cf982bd

SHA256
e4f21aca1e12aafa8de7af24b79a75526e902c7d4b3fea5bdb6e723976997be3

SHA512
b8de2bfeb7af06c587dd1f424d410cf83471f31a55a3ea4c4481ce07ffd9bf66ddc1f7775ecd6ac65ac33baaec90ba5a208a9aefc84f31125a50dfb919982687

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
63e54ca6551a4a091cca75d55e9122b2

SHA1
7afd34b6d2008fec2a36d984d535aea7406a66ce

SHA256
e263f5f17c235debb019644319a773d5feabd2f80fdb3d7783762ba572fe875b

SHA512
22e332795de470945a1864cfe32e90cd993554cf139467610abdb20b1608c2a7e0177f001b2b6f0032daa780980207943b6e1e4f0960e0576a1aea76fd1dd13e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_umbycvxk.jat.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1376-0-0x00007FFF0D8F3000-0x00007FFF0D8F5000-memory.dmp

Filesize
8KB

Download
memory/1376-34-0x0000025AABE30000-0x0000025AABE4E000-memory.dmp

Filesize
120KB

Download
memory/1376-68-0x0000025AABF90000-0x0000025AABFA2000-memory.dmp

Filesize
72KB

Download
memory/1376-67-0x0000025AABED0000-0x0000025AABEDA000-memory.dmp

Filesize
40KB

Download
memory/1376-83-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/1376-2-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/1376-1-0x0000025A91700000-0x0000025A91740000-memory.dmp

Filesize
256KB

Download
memory/1376-32-0x0000025AABEF0000-0x0000025AABF66000-memory.dmp

Filesize
472KB

Download
memory/1376-33-0x0000025AABE70000-0x0000025AABEC0000-memory.dmp

Filesize
320KB

Download
memory/4608-13-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/4608-19-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/4608-18-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/4608-15-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/4608-14-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download
memory/4608-12-0x0000014AD3190000-0x0000014AD31B2000-memory.dmp

Filesize
136KB

Download
memory/4608-3-0x00007FFF0D8F0000-0x00007FFF0E3B2000-memory.dmp

Filesize
10.8MB

Download