umbral | 546a70ec426671547e36c2d520b55babdf18d746a818c4e03539fb82c322245d

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
10/07/2024, 20:20

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General

Target

test.exe
Size

228KB
MD5

25494c4b3d82bc8293c3a9bbb842422f
SHA1

7a5824703d9842147cf3143a753b69d84f5e828a
SHA256

546a70ec426671547e36c2d520b55babdf18d746a818c4e03539fb82c322245d
SHA512

c168c5250212d29b213fb5af9c22ecfc04027a02d30d427173f20ba2f2d28ae872a7f14f0584846fd208c95db0ba8ed476af4d9ca0e88eaf5cfa33fc95bab3eb
SSDEEP

6144:cloZM3rIkd8g+EtXHkv/iD4TZU6+8D/0DVA+Pv+jzb8e1m8Pi:6oZAL+EP8TZU6+8D/0DVA+Pv+bXa

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/844-0-0x00000192E3920000-0x00000192E3960000-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
3740	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
20	discord.com
21	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
4564	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1844	PING.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
844	test.exe
3740	powershell.exe
3740	powershell.exe
3716	powershell.exe
3716	powershell.exe
2012	powershell.exe
2012	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	844	test.exe
Token: SeIncreaseQuotaPrivilege	2476	wmic.exe
Token: SeSecurityPrivilege	2476	wmic.exe
Token: SeTakeOwnershipPrivilege	2476	wmic.exe
Token: SeLoadDriverPrivilege	2476	wmic.exe
Token: SeSystemProfilePrivilege	2476	wmic.exe
Token: SeSystemtimePrivilege	2476	wmic.exe
Token: SeProfSingleProcessPrivilege	2476	wmic.exe
Token: SeIncBasePriorityPrivilege	2476	wmic.exe
Token: SeCreatePagefilePrivilege	2476	wmic.exe
Token: SeBackupPrivilege	2476	wmic.exe
Token: SeRestorePrivilege	2476	wmic.exe
Token: SeShutdownPrivilege	2476	wmic.exe
Token: SeDebugPrivilege	2476	wmic.exe
Token: SeSystemEnvironmentPrivilege	2476	wmic.exe
Token: SeRemoteShutdownPrivilege	2476	wmic.exe
Token: SeUndockPrivilege	2476	wmic.exe
Token: SeManageVolumePrivilege	2476	wmic.exe
Token: 33	2476	wmic.exe
Token: 34	2476	wmic.exe
Token: 35	2476	wmic.exe
Token: 36	2476	wmic.exe
Token: SeIncreaseQuotaPrivilege	2476	wmic.exe
Token: SeSecurityPrivilege	2476	wmic.exe
Token: SeTakeOwnershipPrivilege	2476	wmic.exe
Token: SeLoadDriverPrivilege	2476	wmic.exe
Token: SeSystemProfilePrivilege	2476	wmic.exe
Token: SeSystemtimePrivilege	2476	wmic.exe
Token: SeProfSingleProcessPrivilege	2476	wmic.exe
Token: SeIncBasePriorityPrivilege	2476	wmic.exe
Token: SeCreatePagefilePrivilege	2476	wmic.exe
Token: SeBackupPrivilege	2476	wmic.exe
Token: SeRestorePrivilege	2476	wmic.exe
Token: SeShutdownPrivilege	2476	wmic.exe
Token: SeDebugPrivilege	2476	wmic.exe
Token: SeSystemEnvironmentPrivilege	2476	wmic.exe
Token: SeRemoteShutdownPrivilege	2476	wmic.exe
Token: SeUndockPrivilege	2476	wmic.exe
Token: SeManageVolumePrivilege	2476	wmic.exe
Token: 33	2476	wmic.exe
Token: 34	2476	wmic.exe
Token: 35	2476	wmic.exe
Token: 36	2476	wmic.exe
Token: SeDebugPrivilege	3740	powershell.exe
Token: SeDebugPrivilege	3716	powershell.exe
Token: SeIncreaseQuotaPrivilege	3864	wmic.exe
Token: SeSecurityPrivilege	3864	wmic.exe
Token: SeTakeOwnershipPrivilege	3864	wmic.exe
Token: SeLoadDriverPrivilege	3864	wmic.exe
Token: SeSystemProfilePrivilege	3864	wmic.exe
Token: SeSystemtimePrivilege	3864	wmic.exe
Token: SeProfSingleProcessPrivilege	3864	wmic.exe
Token: SeIncBasePriorityPrivilege	3864	wmic.exe
Token: SeCreatePagefilePrivilege	3864	wmic.exe
Token: SeBackupPrivilege	3864	wmic.exe
Token: SeRestorePrivilege	3864	wmic.exe
Token: SeShutdownPrivilege	3864	wmic.exe
Token: SeDebugPrivilege	3864	wmic.exe
Token: SeSystemEnvironmentPrivilege	3864	wmic.exe
Token: SeRemoteShutdownPrivilege	3864	wmic.exe
Token: SeUndockPrivilege	3864	wmic.exe
Token: SeManageVolumePrivilege	3864	wmic.exe
Token: 33	3864	wmic.exe
Token: 34	3864	wmic.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 844 wrote to memory of 2476	844	test.exe	85
PID 844 wrote to memory of 2476	844	test.exe	85
PID 844 wrote to memory of 1060	844	test.exe	89
PID 844 wrote to memory of 1060	844	test.exe	89
PID 844 wrote to memory of 3740	844	test.exe	91
PID 844 wrote to memory of 3740	844	test.exe	91
PID 844 wrote to memory of 3716	844	test.exe	93
PID 844 wrote to memory of 3716	844	test.exe	93
PID 844 wrote to memory of 3864	844	test.exe	95
PID 844 wrote to memory of 3864	844	test.exe	95
PID 844 wrote to memory of 1524	844	test.exe	97
PID 844 wrote to memory of 1524	844	test.exe	97
PID 844 wrote to memory of 2436	844	test.exe	99
PID 844 wrote to memory of 2436	844	test.exe	99
PID 844 wrote to memory of 2012	844	test.exe	101
PID 844 wrote to memory of 2012	844	test.exe	101
PID 844 wrote to memory of 4564	844	test.exe	103
PID 844 wrote to memory of 4564	844	test.exe	103
PID 844 wrote to memory of 4448	844	test.exe	105
PID 844 wrote to memory of 4448	844	test.exe	105
PID 4448 wrote to memory of 1844	4448	cmd.exe	107
PID 4448 wrote to memory of 1844	4448	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1060	attrib.exe

C:\Users\Admin\AppData\Local\Temp\test.exe
"C:\Users\Admin\AppData\Local\Temp\test.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:844
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2476
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\test.exe"
  2⤵
  - Views/modifies file attributes
  PID:1060
- 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:3740
- 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:3716
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3864
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1524
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2436
- 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:2012
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4564
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\test.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1844

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

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

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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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
6a29e9f9eb72c3bffbb054cd27e3ceea

SHA1
d38f7c2ad68dcf1d24deca9792256ff53d5218b2

SHA256
7a9f831f96b9e4843751dea3ed57ee11d70bb83a5970ddf9d6bd440f4def442c

SHA512
b4826f172c6ac60ad17412a634987c45640b1b8fe03aecba26510ae224685bcd571bc4b131724036e2b502b3a8198fb69414be8c72e46f833f0601a15d313430

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kfweas3c.qen.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/844-1-0x00007FFE07EA3000-0x00007FFE07EA5000-memory.dmp

Filesize
8KB

Download
memory/844-61-0x00000192FDD90000-0x00000192FDE92000-memory.dmp

Filesize
1.0MB

Download
memory/844-42-0x00000192FDEE0000-0x00000192FDEEA000-memory.dmp

Filesize
40KB

Download
memory/844-62-0x00007FFE07EA0000-0x00007FFE08961000-memory.dmp

Filesize
10.8MB

Download
memory/844-43-0x00000192FDF10000-0x00000192FDF22000-memory.dmp

Filesize
72KB

Download
memory/844-2-0x00007FFE07EA0000-0x00007FFE08961000-memory.dmp

Filesize
10.8MB

Download
memory/844-0-0x00000192E3920000-0x00000192E3960000-memory.dmp

Filesize
256KB

Download
memory/844-32-0x00000192FE1B0000-0x00000192FE226000-memory.dmp

Filesize
472KB

Download
memory/844-33-0x00000192FE230000-0x00000192FE280000-memory.dmp

Filesize
320KB

Download
memory/844-34-0x00000192FDEC0000-0x00000192FDEDE000-memory.dmp

Filesize
120KB

Download
memory/3740-14-0x00007FFE07EA0000-0x00007FFE08961000-memory.dmp

Filesize
10.8MB

Download
memory/3740-18-0x00007FFE07EA0000-0x00007FFE08961000-memory.dmp

Filesize
10.8MB

Download
memory/3740-15-0x00007FFE07EA0000-0x00007FFE08961000-memory.dmp

Filesize
10.8MB

Download
memory/3740-12-0x000001DF4D630000-0x000001DF4D652000-memory.dmp

Filesize
136KB

Download
memory/3740-3-0x00007FFE07EA0000-0x00007FFE08961000-memory.dmp

Filesize
10.8MB

Download