umbral | 28fda1422979b63fd9b489a76cf5e43e68aa095eae547e96f050550b37208cab

Resubmissions

30/11/2024, 07:04

241130-hv4cvsxqax 10

30/11/2024, 04:22

241130-ezgg4swqbp 10

Analysis

max time kernel
100s
max time network
139s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
30/11/2024, 07:04

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General

Target

osintool.exe
Size

632KB
MD5

20181934a508ec23e7c2223be3c58e3b
SHA1

a29f3f89d10ff05f4589466bc11a2fd45016e0e5
SHA256

28fda1422979b63fd9b489a76cf5e43e68aa095eae547e96f050550b37208cab
SHA512

8f0a1dfa0e627d7779754cd045dc9dcaedbcb332870962706a9bbcc69d9383c8166c940844047ba4a85e3209f5bf0d284f7e84e67345347f8f2c21d93ef043f7
SSDEEP

12288:hoZtL+EP8shN9rI8jS67NokRq8zNiMdRC:fI8iN9rI8jS67NokRlBiMdA

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4276-1-0x0000029C994A0000-0x0000029C99544000-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
3344	powershell.exe
1792	powershell.exe
3892	powershell.exe
4420	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	osintool.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
20	discord.com
21	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 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
4472	PING.EXE
4712	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3700	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4472	PING.EXE

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
412	wmic.exe
412	wmic.exe
412	wmic.exe
412	wmic.exe
4276	osintool.exe
4420	powershell.exe
4420	powershell.exe
3344	powershell.exe
3344	powershell.exe
1792	powershell.exe
1792	powershell.exe
2356	powershell.exe
2356	powershell.exe
4196	wmic.exe
4196	wmic.exe
4196	wmic.exe
4196	wmic.exe
3384	wmic.exe
3384	wmic.exe
3384	wmic.exe
3384	wmic.exe
1524	wmic.exe
1524	wmic.exe
1524	wmic.exe
1524	wmic.exe
3892	powershell.exe
3892	powershell.exe
3700	wmic.exe
3700	wmic.exe
3700	wmic.exe
3700	wmic.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4276	osintool.exe
Token: SeIncreaseQuotaPrivilege	412	wmic.exe
Token: SeSecurityPrivilege	412	wmic.exe
Token: SeTakeOwnershipPrivilege	412	wmic.exe
Token: SeLoadDriverPrivilege	412	wmic.exe
Token: SeSystemProfilePrivilege	412	wmic.exe
Token: SeSystemtimePrivilege	412	wmic.exe
Token: SeProfSingleProcessPrivilege	412	wmic.exe
Token: SeIncBasePriorityPrivilege	412	wmic.exe
Token: SeCreatePagefilePrivilege	412	wmic.exe
Token: SeBackupPrivilege	412	wmic.exe
Token: SeRestorePrivilege	412	wmic.exe
Token: SeShutdownPrivilege	412	wmic.exe
Token: SeDebugPrivilege	412	wmic.exe
Token: SeSystemEnvironmentPrivilege	412	wmic.exe
Token: SeRemoteShutdownPrivilege	412	wmic.exe
Token: SeUndockPrivilege	412	wmic.exe
Token: SeManageVolumePrivilege	412	wmic.exe
Token: 33	412	wmic.exe
Token: 34	412	wmic.exe
Token: 35	412	wmic.exe
Token: 36	412	wmic.exe
Token: SeIncreaseQuotaPrivilege	412	wmic.exe
Token: SeSecurityPrivilege	412	wmic.exe
Token: SeTakeOwnershipPrivilege	412	wmic.exe
Token: SeLoadDriverPrivilege	412	wmic.exe
Token: SeSystemProfilePrivilege	412	wmic.exe
Token: SeSystemtimePrivilege	412	wmic.exe
Token: SeProfSingleProcessPrivilege	412	wmic.exe
Token: SeIncBasePriorityPrivilege	412	wmic.exe
Token: SeCreatePagefilePrivilege	412	wmic.exe
Token: SeBackupPrivilege	412	wmic.exe
Token: SeRestorePrivilege	412	wmic.exe
Token: SeShutdownPrivilege	412	wmic.exe
Token: SeDebugPrivilege	412	wmic.exe
Token: SeSystemEnvironmentPrivilege	412	wmic.exe
Token: SeRemoteShutdownPrivilege	412	wmic.exe
Token: SeUndockPrivilege	412	wmic.exe
Token: SeManageVolumePrivilege	412	wmic.exe
Token: 33	412	wmic.exe
Token: 34	412	wmic.exe
Token: 35	412	wmic.exe
Token: 36	412	wmic.exe
Token: SeDebugPrivilege	4420	powershell.exe
Token: SeIncreaseQuotaPrivilege	4420	powershell.exe
Token: SeSecurityPrivilege	4420	powershell.exe
Token: SeTakeOwnershipPrivilege	4420	powershell.exe
Token: SeLoadDriverPrivilege	4420	powershell.exe
Token: SeSystemProfilePrivilege	4420	powershell.exe
Token: SeSystemtimePrivilege	4420	powershell.exe
Token: SeProfSingleProcessPrivilege	4420	powershell.exe
Token: SeIncBasePriorityPrivilege	4420	powershell.exe
Token: SeCreatePagefilePrivilege	4420	powershell.exe
Token: SeBackupPrivilege	4420	powershell.exe
Token: SeRestorePrivilege	4420	powershell.exe
Token: SeShutdownPrivilege	4420	powershell.exe
Token: SeDebugPrivilege	4420	powershell.exe
Token: SeSystemEnvironmentPrivilege	4420	powershell.exe
Token: SeRemoteShutdownPrivilege	4420	powershell.exe
Token: SeUndockPrivilege	4420	powershell.exe
Token: SeManageVolumePrivilege	4420	powershell.exe
Token: 33	4420	powershell.exe
Token: 34	4420	powershell.exe
Token: 35	4420	powershell.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4276 wrote to memory of 412	4276	osintool.exe	80
PID 4276 wrote to memory of 412	4276	osintool.exe	80
PID 4276 wrote to memory of 4884	4276	osintool.exe	83
PID 4276 wrote to memory of 4884	4276	osintool.exe	83
PID 4276 wrote to memory of 4420	4276	osintool.exe	85
PID 4276 wrote to memory of 4420	4276	osintool.exe	85
PID 4276 wrote to memory of 3344	4276	osintool.exe	88
PID 4276 wrote to memory of 3344	4276	osintool.exe	88
PID 4276 wrote to memory of 1792	4276	osintool.exe	92
PID 4276 wrote to memory of 1792	4276	osintool.exe	92
PID 4276 wrote to memory of 2356	4276	osintool.exe	94
PID 4276 wrote to memory of 2356	4276	osintool.exe	94
PID 4276 wrote to memory of 4196	4276	osintool.exe	97
PID 4276 wrote to memory of 4196	4276	osintool.exe	97
PID 4276 wrote to memory of 3384	4276	osintool.exe	99
PID 4276 wrote to memory of 3384	4276	osintool.exe	99
PID 4276 wrote to memory of 1524	4276	osintool.exe	101
PID 4276 wrote to memory of 1524	4276	osintool.exe	101
PID 4276 wrote to memory of 3892	4276	osintool.exe	103
PID 4276 wrote to memory of 3892	4276	osintool.exe	103
PID 4276 wrote to memory of 3700	4276	osintool.exe	105
PID 4276 wrote to memory of 3700	4276	osintool.exe	105
PID 4276 wrote to memory of 4712	4276	osintool.exe	107
PID 4276 wrote to memory of 4712	4276	osintool.exe	107
PID 4712 wrote to memory of 4472	4712	cmd.exe	109
PID 4712 wrote to memory of 4472	4712	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4884	attrib.exe

C:\Users\Admin\AppData\Local\Temp\osintool.exe
"C:\Users\Admin\AppData\Local\Temp\osintool.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4276
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:412
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\osintool.exe"
  2⤵
  - Views/modifies file attributes
  PID:4884
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\osintool.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4420
- 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:3344
- 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:1792
- 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:2356
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4196
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:3384
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1524
- 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:3892
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  - Suspicious behavior: EnumeratesProcesses
  PID:3700
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\osintool.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4712
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4472

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
60b3262c3163ee3d466199160b9ed07d

SHA1
994ece4ea4e61de0be2fdd580f87e3415f9e1ff6

SHA256
e3b30f16d41f94cba2b8a75f35c91ae7418465abfbfe5477ec0551d1952b2fdb

SHA512
081d2015cb94477eb0fbc38f44b6d9b4a3204fb3ad0b7d0e146a88ab4ab9a0d475207f1adae03f4a81ccc5beb7568dc8be1249f69e32fe56efd9ee2f6ee3b1af

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

Filesize
948B

MD5
cd4e1330b55d633a92e6a831f06fb4ef

SHA1
b06925fba40584f8d8864a13b71828a33dd40051

SHA256
c563e52f15c87dd1caeda1df794ea23f65878dca4e12aec2787e70bc6a519942

SHA512
8a822e934596798eaa3b35cea47291c8ca275639ff818dceab28d12124614fd245ccdb4d94d868484c18325c8c4412f7614369847817c10512d91e7b93d90139

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

Filesize
1KB

MD5
8e1fdd1b66d2fee9f6a052524d4ddca5

SHA1
0a9d0994559d1be2eecd8b0d6960540ca627bdb6

SHA256
4cc7c1b79d1b48582d4dc27ca8c31457b9bf2441deb7914399bb9e6863f18b13

SHA512
5a5494b878b08e8515811ab7a3d68780dac7423f5562477d98249a8bedf7ec98567b7cd5d4c6967d6bc63f2d6d9b7da9a65e0eb29d4b955026b469b5b598d1f3

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

Filesize
1KB

MD5
43af66a28ed429a2af161d8a222cc4eb

SHA1
49f185e99c50b1f8e4dc3ae7a093dca2b0e3e523

SHA256
b3374a3cf49099885c8f32504c1a1e7644526686580762aff22ebe143d809025

SHA512
5dac23a6b9058ec07ec1a4fac12f96d722b8b9bd4ad84fdeba8f4645a47a92d749f9fe55a9a555f44272b86b7b2e0ea123531d493b291996f536ef338f83404a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fee111vq.ag0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4276-60-0x0000029CB3D10000-0x0000029CB3D22000-memory.dmp

Filesize
72KB

Download
memory/4276-34-0x0000029C9B3C0000-0x0000029C9B3DE000-memory.dmp

Filesize
120KB

Download
memory/4276-80-0x00007FFC03DE0000-0x00007FFC048A2000-memory.dmp

Filesize
10.8MB

Download
memory/4276-59-0x0000029C9B3E0000-0x0000029C9B3EA000-memory.dmp

Filesize
40KB

Download
memory/4276-2-0x00007FFC03DE0000-0x00007FFC048A2000-memory.dmp

Filesize
10.8MB

Download
memory/4276-32-0x0000029CB3C90000-0x0000029CB3D06000-memory.dmp

Filesize
472KB

Download
memory/4276-33-0x0000029CB3C10000-0x0000029CB3C60000-memory.dmp

Filesize
320KB

Download
memory/4276-0-0x00007FFC03DE3000-0x00007FFC03DE5000-memory.dmp

Filesize
8KB

Download
memory/4276-1-0x0000029C994A0000-0x0000029C99544000-memory.dmp

Filesize
656KB

Download
memory/4420-11-0x000001DAC0AA0000-0x000001DAC0AC2000-memory.dmp

Filesize
136KB

Download
memory/4420-4-0x00007FFC03DE0000-0x00007FFC048A2000-memory.dmp

Filesize
10.8MB

Download
memory/4420-3-0x00007FFC03DE0000-0x00007FFC048A2000-memory.dmp

Filesize
10.8MB

Download
memory/4420-5-0x00007FFC03DE0000-0x00007FFC048A2000-memory.dmp

Filesize
10.8MB

Download
memory/4420-18-0x00007FFC03DE0000-0x00007FFC048A2000-memory.dmp

Filesize
10.8MB

Download