umbral | 546a70ec426671547e36c2d520b55babdf18d746a818c4e03539fb82c322245d

Analysis

max time kernel
16s
max time network
17s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-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
behavioral1/memory/1712-1-0x0000000000C30000-0x0000000000C70000-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
2856	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2912	cmd.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
7	discord.com
8	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
4	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2560	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2988	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1712	test.exe
2856	powershell.exe
2312	powershell.exe
2088	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1712	test.exe
Token: SeIncreaseQuotaPrivilege	2252	wmic.exe
Token: SeSecurityPrivilege	2252	wmic.exe
Token: SeTakeOwnershipPrivilege	2252	wmic.exe
Token: SeLoadDriverPrivilege	2252	wmic.exe
Token: SeSystemProfilePrivilege	2252	wmic.exe
Token: SeSystemtimePrivilege	2252	wmic.exe
Token: SeProfSingleProcessPrivilege	2252	wmic.exe
Token: SeIncBasePriorityPrivilege	2252	wmic.exe
Token: SeCreatePagefilePrivilege	2252	wmic.exe
Token: SeBackupPrivilege	2252	wmic.exe
Token: SeRestorePrivilege	2252	wmic.exe
Token: SeShutdownPrivilege	2252	wmic.exe
Token: SeDebugPrivilege	2252	wmic.exe
Token: SeSystemEnvironmentPrivilege	2252	wmic.exe
Token: SeRemoteShutdownPrivilege	2252	wmic.exe
Token: SeUndockPrivilege	2252	wmic.exe
Token: SeManageVolumePrivilege	2252	wmic.exe
Token: 33	2252	wmic.exe
Token: 34	2252	wmic.exe
Token: 35	2252	wmic.exe
Token: SeIncreaseQuotaPrivilege	2252	wmic.exe
Token: SeSecurityPrivilege	2252	wmic.exe
Token: SeTakeOwnershipPrivilege	2252	wmic.exe
Token: SeLoadDriverPrivilege	2252	wmic.exe
Token: SeSystemProfilePrivilege	2252	wmic.exe
Token: SeSystemtimePrivilege	2252	wmic.exe
Token: SeProfSingleProcessPrivilege	2252	wmic.exe
Token: SeIncBasePriorityPrivilege	2252	wmic.exe
Token: SeCreatePagefilePrivilege	2252	wmic.exe
Token: SeBackupPrivilege	2252	wmic.exe
Token: SeRestorePrivilege	2252	wmic.exe
Token: SeShutdownPrivilege	2252	wmic.exe
Token: SeDebugPrivilege	2252	wmic.exe
Token: SeSystemEnvironmentPrivilege	2252	wmic.exe
Token: SeRemoteShutdownPrivilege	2252	wmic.exe
Token: SeUndockPrivilege	2252	wmic.exe
Token: SeManageVolumePrivilege	2252	wmic.exe
Token: 33	2252	wmic.exe
Token: 34	2252	wmic.exe
Token: 35	2252	wmic.exe
Token: SeDebugPrivilege	2856	powershell.exe
Token: SeDebugPrivilege	2312	powershell.exe
Token: SeIncreaseQuotaPrivilege	2368	wmic.exe
Token: SeSecurityPrivilege	2368	wmic.exe
Token: SeTakeOwnershipPrivilege	2368	wmic.exe
Token: SeLoadDriverPrivilege	2368	wmic.exe
Token: SeSystemProfilePrivilege	2368	wmic.exe
Token: SeSystemtimePrivilege	2368	wmic.exe
Token: SeProfSingleProcessPrivilege	2368	wmic.exe
Token: SeIncBasePriorityPrivilege	2368	wmic.exe
Token: SeCreatePagefilePrivilege	2368	wmic.exe
Token: SeBackupPrivilege	2368	wmic.exe
Token: SeRestorePrivilege	2368	wmic.exe
Token: SeShutdownPrivilege	2368	wmic.exe
Token: SeDebugPrivilege	2368	wmic.exe
Token: SeSystemEnvironmentPrivilege	2368	wmic.exe
Token: SeRemoteShutdownPrivilege	2368	wmic.exe
Token: SeUndockPrivilege	2368	wmic.exe
Token: SeManageVolumePrivilege	2368	wmic.exe
Token: 33	2368	wmic.exe
Token: 34	2368	wmic.exe
Token: 35	2368	wmic.exe
Token: SeIncreaseQuotaPrivilege	2368	wmic.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 1712 wrote to memory of 2252	1712	test.exe	29
PID 1712 wrote to memory of 2252	1712	test.exe	29
PID 1712 wrote to memory of 2252	1712	test.exe	29
PID 1712 wrote to memory of 2788	1712	test.exe	32
PID 1712 wrote to memory of 2788	1712	test.exe	32
PID 1712 wrote to memory of 2788	1712	test.exe	32
PID 1712 wrote to memory of 2856	1712	test.exe	34
PID 1712 wrote to memory of 2856	1712	test.exe	34
PID 1712 wrote to memory of 2856	1712	test.exe	34
PID 1712 wrote to memory of 2312	1712	test.exe	36
PID 1712 wrote to memory of 2312	1712	test.exe	36
PID 1712 wrote to memory of 2312	1712	test.exe	36
PID 1712 wrote to memory of 2368	1712	test.exe	38
PID 1712 wrote to memory of 2368	1712	test.exe	38
PID 1712 wrote to memory of 2368	1712	test.exe	38
PID 1712 wrote to memory of 2804	1712	test.exe	40
PID 1712 wrote to memory of 2804	1712	test.exe	40
PID 1712 wrote to memory of 2804	1712	test.exe	40
PID 1712 wrote to memory of 2204	1712	test.exe	42
PID 1712 wrote to memory of 2204	1712	test.exe	42
PID 1712 wrote to memory of 2204	1712	test.exe	42
PID 1712 wrote to memory of 2088	1712	test.exe	44
PID 1712 wrote to memory of 2088	1712	test.exe	44
PID 1712 wrote to memory of 2088	1712	test.exe	44
PID 1712 wrote to memory of 2560	1712	test.exe	46
PID 1712 wrote to memory of 2560	1712	test.exe	46
PID 1712 wrote to memory of 2560	1712	test.exe	46
PID 1712 wrote to memory of 2912	1712	test.exe	48
PID 1712 wrote to memory of 2912	1712	test.exe	48
PID 1712 wrote to memory of 2912	1712	test.exe	48
PID 2912 wrote to memory of 2988	2912	cmd.exe	50
PID 2912 wrote to memory of 2988	2912	cmd.exe	50
PID 2912 wrote to memory of 2988	2912	cmd.exe	50

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2788	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:1712
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2252
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\test.exe"
  2⤵
  - Views/modifies file attributes
  PID:2788
- 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:2856
- 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:2312
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2368
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:2804
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2204
- 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:2088
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2560
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\test.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2912
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2988

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
75dbca77da50eea2526f2bc0c1eef81c

SHA1
0cc529d0a33e6de49f7467d317aa1cb4938a1ac0

SHA256
55d08aeff2dbae8485ba12be8e4da2d466b030bf6af3f17f538f76b6d7d94299

SHA512
b235e5c1b7c00a9c704009b1aed129cd7abc90ccd6d8f73cb012d1716d2270553fa2ae11fa77e7c610ef2442d223a06b0f9677b69e8abf24be92caf26951729b

Download Submit
memory/1712-0-0x000007FEF5713000-0x000007FEF5714000-memory.dmp

Filesize
4KB

Download
memory/1712-1-0x0000000000C30000-0x0000000000C70000-memory.dmp

Filesize
256KB

Download
memory/1712-2-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/1712-33-0x000007FEF5710000-0x000007FEF60FC000-memory.dmp

Filesize
9.9MB

Download
memory/2088-28-0x000000001B7C0000-0x000000001BAA2000-memory.dmp

Filesize
2.9MB

Download
memory/2088-29-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/2312-14-0x000000001B530000-0x000000001B812000-memory.dmp

Filesize
2.9MB

Download
memory/2312-15-0x0000000002960000-0x0000000002968000-memory.dmp

Filesize
32KB

Download
memory/2856-7-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2856-8-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download