umbral | d646794ea3c663854047a79206ef3dc27f16c01162248a95d8d52927c05f1889

Analysis

max time kernel
118s
max time network
122s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
09/02/2024, 13:22

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General

Target

guilded_ums.exe
Size

227KB
MD5

adbb1ff2093cd75f5d386ed3071f732a
SHA1

cbec205579e47cfab72873a13f3021b56c111b68
SHA256

d646794ea3c663854047a79206ef3dc27f16c01162248a95d8d52927c05f1889
SHA512

236f6fcda0a5808d63e34bb5c542196212d039bb739ed9c0902a0c899d01bfb47403561d6a9e69668e5e5055a42c46daf46910364d5a74be5c4cca2f84dd24ec
SSDEEP

6144:dloZMxNXg+dOntLnEPfdMXGkVW2U7X8gtoGnnG+Tb8e1mai:/oZxEOn0mGkVW2U7X8gtoGnnGEw

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2208-0-0x00000000001C0000-0x0000000000200000-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	guilded_ums.exe

Deletes itself 1 IoCs

pid	Process
1396	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

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
6	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3028	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2448	PING.EXE

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2760	powershell.exe
2592	powershell.exe
1316	powershell.exe
2800	powershell.exe
1004	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2208	guilded_ums.exe
Token: SeDebugPrivilege	2760	powershell.exe
Token: SeDebugPrivilege	2592	powershell.exe
Token: SeDebugPrivilege	1316	powershell.exe
Token: SeDebugPrivilege	2800	powershell.exe
Token: SeIncreaseQuotaPrivilege	1036	wmic.exe
Token: SeSecurityPrivilege	1036	wmic.exe
Token: SeTakeOwnershipPrivilege	1036	wmic.exe
Token: SeLoadDriverPrivilege	1036	wmic.exe
Token: SeSystemProfilePrivilege	1036	wmic.exe
Token: SeSystemtimePrivilege	1036	wmic.exe
Token: SeProfSingleProcessPrivilege	1036	wmic.exe
Token: SeIncBasePriorityPrivilege	1036	wmic.exe
Token: SeCreatePagefilePrivilege	1036	wmic.exe
Token: SeBackupPrivilege	1036	wmic.exe
Token: SeRestorePrivilege	1036	wmic.exe
Token: SeShutdownPrivilege	1036	wmic.exe
Token: SeDebugPrivilege	1036	wmic.exe
Token: SeSystemEnvironmentPrivilege	1036	wmic.exe
Token: SeRemoteShutdownPrivilege	1036	wmic.exe
Token: SeUndockPrivilege	1036	wmic.exe
Token: SeManageVolumePrivilege	1036	wmic.exe
Token: 33	1036	wmic.exe
Token: 34	1036	wmic.exe
Token: 35	1036	wmic.exe
Token: SeIncreaseQuotaPrivilege	1036	wmic.exe
Token: SeSecurityPrivilege	1036	wmic.exe
Token: SeTakeOwnershipPrivilege	1036	wmic.exe
Token: SeLoadDriverPrivilege	1036	wmic.exe
Token: SeSystemProfilePrivilege	1036	wmic.exe
Token: SeSystemtimePrivilege	1036	wmic.exe
Token: SeProfSingleProcessPrivilege	1036	wmic.exe
Token: SeIncBasePriorityPrivilege	1036	wmic.exe
Token: SeCreatePagefilePrivilege	1036	wmic.exe
Token: SeBackupPrivilege	1036	wmic.exe
Token: SeRestorePrivilege	1036	wmic.exe
Token: SeShutdownPrivilege	1036	wmic.exe
Token: SeDebugPrivilege	1036	wmic.exe
Token: SeSystemEnvironmentPrivilege	1036	wmic.exe
Token: SeRemoteShutdownPrivilege	1036	wmic.exe
Token: SeUndockPrivilege	1036	wmic.exe
Token: SeManageVolumePrivilege	1036	wmic.exe
Token: 33	1036	wmic.exe
Token: 34	1036	wmic.exe
Token: 35	1036	wmic.exe
Token: SeIncreaseQuotaPrivilege	816	wmic.exe
Token: SeSecurityPrivilege	816	wmic.exe
Token: SeTakeOwnershipPrivilege	816	wmic.exe
Token: SeLoadDriverPrivilege	816	wmic.exe
Token: SeSystemProfilePrivilege	816	wmic.exe
Token: SeSystemtimePrivilege	816	wmic.exe
Token: SeProfSingleProcessPrivilege	816	wmic.exe
Token: SeIncBasePriorityPrivilege	816	wmic.exe
Token: SeCreatePagefilePrivilege	816	wmic.exe
Token: SeBackupPrivilege	816	wmic.exe
Token: SeRestorePrivilege	816	wmic.exe
Token: SeShutdownPrivilege	816	wmic.exe
Token: SeDebugPrivilege	816	wmic.exe
Token: SeSystemEnvironmentPrivilege	816	wmic.exe
Token: SeRemoteShutdownPrivilege	816	wmic.exe
Token: SeUndockPrivilege	816	wmic.exe
Token: SeManageVolumePrivilege	816	wmic.exe
Token: 33	816	wmic.exe
Token: 34	816	wmic.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 2208 wrote to memory of 1424	2208	guilded_ums.exe	28
PID 2208 wrote to memory of 1424	2208	guilded_ums.exe	28
PID 2208 wrote to memory of 1424	2208	guilded_ums.exe	28
PID 2208 wrote to memory of 2760	2208	guilded_ums.exe	30
PID 2208 wrote to memory of 2760	2208	guilded_ums.exe	30
PID 2208 wrote to memory of 2760	2208	guilded_ums.exe	30
PID 2208 wrote to memory of 2592	2208	guilded_ums.exe	32
PID 2208 wrote to memory of 2592	2208	guilded_ums.exe	32
PID 2208 wrote to memory of 2592	2208	guilded_ums.exe	32
PID 2208 wrote to memory of 1316	2208	guilded_ums.exe	34
PID 2208 wrote to memory of 1316	2208	guilded_ums.exe	34
PID 2208 wrote to memory of 1316	2208	guilded_ums.exe	34
PID 2208 wrote to memory of 2800	2208	guilded_ums.exe	36
PID 2208 wrote to memory of 2800	2208	guilded_ums.exe	36
PID 2208 wrote to memory of 2800	2208	guilded_ums.exe	36
PID 2208 wrote to memory of 1036	2208	guilded_ums.exe	38
PID 2208 wrote to memory of 1036	2208	guilded_ums.exe	38
PID 2208 wrote to memory of 1036	2208	guilded_ums.exe	38
PID 2208 wrote to memory of 816	2208	guilded_ums.exe	41
PID 2208 wrote to memory of 816	2208	guilded_ums.exe	41
PID 2208 wrote to memory of 816	2208	guilded_ums.exe	41
PID 2208 wrote to memory of 1612	2208	guilded_ums.exe	43
PID 2208 wrote to memory of 1612	2208	guilded_ums.exe	43
PID 2208 wrote to memory of 1612	2208	guilded_ums.exe	43
PID 2208 wrote to memory of 1004	2208	guilded_ums.exe	45
PID 2208 wrote to memory of 1004	2208	guilded_ums.exe	45
PID 2208 wrote to memory of 1004	2208	guilded_ums.exe	45
PID 2208 wrote to memory of 3028	2208	guilded_ums.exe	47
PID 2208 wrote to memory of 3028	2208	guilded_ums.exe	47
PID 2208 wrote to memory of 3028	2208	guilded_ums.exe	47
PID 2208 wrote to memory of 1396	2208	guilded_ums.exe	49
PID 2208 wrote to memory of 1396	2208	guilded_ums.exe	49
PID 2208 wrote to memory of 1396	2208	guilded_ums.exe	49
PID 1396 wrote to memory of 2448	1396	cmd.exe	51
PID 1396 wrote to memory of 2448	1396	cmd.exe	51
PID 1396 wrote to memory of 2448	1396	cmd.exe	51

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1424	attrib.exe

C:\Users\Admin\AppData\Local\Temp\guilded_ums.exe
"C:\Users\Admin\AppData\Local\Temp\guilded_ums.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2208
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\guilded_ums.exe"
  2⤵
  - Views/modifies file attributes
  PID:1424
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\guilded_ums.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2760
- 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:2592
- 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:1316
- 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:2800
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:816
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1612
- 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:1004
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3028
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\guilded_ums.exe" && pause
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1396
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2448

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

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
843f06e565ba0793bed49353fa30eb36

SHA1
a08e56abe598c5ace42ad5b33cbd303f49c05e9e

SHA256
937510c9f2e41be4168eedf1293cdc32051cb768b83ad9511e02095e90ccfdfb

SHA512
8d245d00e04b7f796c2818f96c0360796bc792938d48adb26dd4c82fe359a9cf8ab923a7dae038e45f853c71839622a376baaf9c4db8a074b740885f5efc6e8b

Download Submit
memory/1004-80-0x000007FEEDD30000-0x000007FEEE6CD000-memory.dmp

Filesize
9.6MB

Download
memory/1004-79-0x0000000002970000-0x00000000029F0000-memory.dmp

Filesize
512KB

Download
memory/1004-78-0x0000000002970000-0x00000000029F0000-memory.dmp

Filesize
512KB

Download
memory/1004-77-0x000007FEEDD30000-0x000007FEEE6CD000-memory.dmp

Filesize
9.6MB

Download
memory/1004-76-0x0000000002970000-0x00000000029F0000-memory.dmp

Filesize
512KB

Download
memory/1004-75-0x000007FEEDD30000-0x000007FEEE6CD000-memory.dmp

Filesize
9.6MB

Download
memory/1004-74-0x0000000002460000-0x0000000002468000-memory.dmp

Filesize
32KB

Download
memory/1316-45-0x0000000002840000-0x00000000028C0000-memory.dmp

Filesize
512KB

Download
memory/1316-44-0x000007FEEDF30000-0x000007FEEE8CD000-memory.dmp

Filesize
9.6MB

Download
memory/1316-51-0x000007FEEDF30000-0x000007FEEE8CD000-memory.dmp

Filesize
9.6MB

Download
memory/1316-47-0x0000000002844000-0x0000000002847000-memory.dmp

Filesize
12KB

Download
memory/1316-49-0x000000000284B000-0x00000000028B2000-memory.dmp

Filesize
412KB

Download
memory/1316-50-0x0000000002840000-0x00000000028C0000-memory.dmp

Filesize
512KB

Download
memory/1316-46-0x000007FEEDF30000-0x000007FEEE8CD000-memory.dmp

Filesize
9.6MB

Download
memory/2208-84-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/2208-1-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/2208-2-0x000000001B2F0000-0x000000001B370000-memory.dmp

Filesize
512KB

Download
memory/2208-57-0x000000001B2F0000-0x000000001B370000-memory.dmp

Filesize
512KB

Download
memory/2208-48-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/2208-0-0x00000000001C0000-0x0000000000200000-memory.dmp

Filesize
256KB

Download
memory/2592-26-0x000007FEED590000-0x000007FEEDF2D000-memory.dmp

Filesize
9.6MB

Download
memory/2592-30-0x0000000002080000-0x0000000002100000-memory.dmp

Filesize
512KB

Download
memory/2592-29-0x000007FEED590000-0x000007FEEDF2D000-memory.dmp

Filesize
9.6MB

Download
memory/2592-28-0x0000000002080000-0x0000000002100000-memory.dmp

Filesize
512KB

Download
memory/2592-21-0x000000001B3F0000-0x000000001B6D2000-memory.dmp

Filesize
2.9MB

Download
memory/2592-27-0x0000000002080000-0x0000000002100000-memory.dmp

Filesize
512KB

Download
memory/2592-25-0x0000000002080000-0x0000000002100000-memory.dmp

Filesize
512KB

Download
memory/2592-24-0x0000000002080000-0x0000000002100000-memory.dmp

Filesize
512KB

Download
memory/2592-22-0x0000000001EE0000-0x0000000001EE8000-memory.dmp

Filesize
32KB

Download
memory/2592-23-0x000007FEED590000-0x000007FEEDF2D000-memory.dmp

Filesize
9.6MB

Download
memory/2760-10-0x0000000002660000-0x00000000026E0000-memory.dmp

Filesize
512KB

Download
memory/2760-9-0x0000000001FC0000-0x0000000001FC8000-memory.dmp

Filesize
32KB

Download
memory/2760-15-0x000007FEEDF30000-0x000007FEEE8CD000-memory.dmp

Filesize
9.6MB

Download
memory/2760-12-0x0000000002660000-0x00000000026E0000-memory.dmp

Filesize
512KB

Download
memory/2760-14-0x0000000002660000-0x00000000026E0000-memory.dmp

Filesize
512KB

Download
memory/2760-7-0x000000001B250000-0x000000001B532000-memory.dmp

Filesize
2.9MB

Download
memory/2760-8-0x000007FEEDF30000-0x000007FEEE8CD000-memory.dmp

Filesize
9.6MB

Download
memory/2760-13-0x0000000002660000-0x00000000026E0000-memory.dmp

Filesize
512KB

Download
memory/2760-11-0x000007FEEDF30000-0x000007FEEE8CD000-memory.dmp

Filesize
9.6MB

Download
memory/2800-58-0x000007FEED590000-0x000007FEEDF2D000-memory.dmp

Filesize
9.6MB

Download
memory/2800-59-0x0000000002690000-0x0000000002710000-memory.dmp

Filesize
512KB

Download
memory/2800-62-0x000007FEED590000-0x000007FEEDF2D000-memory.dmp

Filesize
9.6MB

Download
memory/2800-64-0x000000000269B000-0x0000000002702000-memory.dmp

Filesize
412KB

Download
memory/2800-63-0x000007FEED590000-0x000007FEEDF2D000-memory.dmp

Filesize
9.6MB

Download
memory/2800-61-0x0000000002690000-0x0000000002710000-memory.dmp

Filesize
512KB

Download
memory/2800-60-0x0000000002690000-0x0000000002710000-memory.dmp

Filesize
512KB

Download