umbral | 28fda1422979b63fd9b489a76cf5e43e68aa095eae547e96f050550b37208cab

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2024 04:29

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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
behavioral2/memory/3924-1-0x000001A05AFF0000-0x000001A05B094000-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
4364	powershell.exe
4920	powershell.exe
1896	powershell.exe
3264	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
19	discord.com
20	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
376	cmd.exe
1836	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
732	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1836	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3924	osintool.exe
4364	powershell.exe
4364	powershell.exe
1896	powershell.exe
1896	powershell.exe
3264	powershell.exe
3264	powershell.exe
2108	powershell.exe
2108	powershell.exe
4920	powershell.exe
4920	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3924	osintool.exe
Token: SeIncreaseQuotaPrivilege	3624	wmic.exe
Token: SeSecurityPrivilege	3624	wmic.exe
Token: SeTakeOwnershipPrivilege	3624	wmic.exe
Token: SeLoadDriverPrivilege	3624	wmic.exe
Token: SeSystemProfilePrivilege	3624	wmic.exe
Token: SeSystemtimePrivilege	3624	wmic.exe
Token: SeProfSingleProcessPrivilege	3624	wmic.exe
Token: SeIncBasePriorityPrivilege	3624	wmic.exe
Token: SeCreatePagefilePrivilege	3624	wmic.exe
Token: SeBackupPrivilege	3624	wmic.exe
Token: SeRestorePrivilege	3624	wmic.exe
Token: SeShutdownPrivilege	3624	wmic.exe
Token: SeDebugPrivilege	3624	wmic.exe
Token: SeSystemEnvironmentPrivilege	3624	wmic.exe
Token: SeRemoteShutdownPrivilege	3624	wmic.exe
Token: SeUndockPrivilege	3624	wmic.exe
Token: SeManageVolumePrivilege	3624	wmic.exe
Token: 33	3624	wmic.exe
Token: 34	3624	wmic.exe
Token: 35	3624	wmic.exe
Token: 36	3624	wmic.exe
Token: SeIncreaseQuotaPrivilege	3624	wmic.exe
Token: SeSecurityPrivilege	3624	wmic.exe
Token: SeTakeOwnershipPrivilege	3624	wmic.exe
Token: SeLoadDriverPrivilege	3624	wmic.exe
Token: SeSystemProfilePrivilege	3624	wmic.exe
Token: SeSystemtimePrivilege	3624	wmic.exe
Token: SeProfSingleProcessPrivilege	3624	wmic.exe
Token: SeIncBasePriorityPrivilege	3624	wmic.exe
Token: SeCreatePagefilePrivilege	3624	wmic.exe
Token: SeBackupPrivilege	3624	wmic.exe
Token: SeRestorePrivilege	3624	wmic.exe
Token: SeShutdownPrivilege	3624	wmic.exe
Token: SeDebugPrivilege	3624	wmic.exe
Token: SeSystemEnvironmentPrivilege	3624	wmic.exe
Token: SeRemoteShutdownPrivilege	3624	wmic.exe
Token: SeUndockPrivilege	3624	wmic.exe
Token: SeManageVolumePrivilege	3624	wmic.exe
Token: 33	3624	wmic.exe
Token: 34	3624	wmic.exe
Token: 35	3624	wmic.exe
Token: 36	3624	wmic.exe
Token: SeDebugPrivilege	4364	powershell.exe
Token: SeDebugPrivilege	1896	powershell.exe
Token: SeDebugPrivilege	3264	powershell.exe
Token: SeDebugPrivilege	2108	powershell.exe
Token: SeIncreaseQuotaPrivilege	4492	wmic.exe
Token: SeSecurityPrivilege	4492	wmic.exe
Token: SeTakeOwnershipPrivilege	4492	wmic.exe
Token: SeLoadDriverPrivilege	4492	wmic.exe
Token: SeSystemProfilePrivilege	4492	wmic.exe
Token: SeSystemtimePrivilege	4492	wmic.exe
Token: SeProfSingleProcessPrivilege	4492	wmic.exe
Token: SeIncBasePriorityPrivilege	4492	wmic.exe
Token: SeCreatePagefilePrivilege	4492	wmic.exe
Token: SeBackupPrivilege	4492	wmic.exe
Token: SeRestorePrivilege	4492	wmic.exe
Token: SeShutdownPrivilege	4492	wmic.exe
Token: SeDebugPrivilege	4492	wmic.exe
Token: SeSystemEnvironmentPrivilege	4492	wmic.exe
Token: SeRemoteShutdownPrivilege	4492	wmic.exe
Token: SeUndockPrivilege	4492	wmic.exe
Token: SeManageVolumePrivilege	4492	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3924 wrote to memory of 3624	3924	osintool.exe	83
PID 3924 wrote to memory of 3624	3924	osintool.exe	83
PID 3924 wrote to memory of 4688	3924	osintool.exe	86
PID 3924 wrote to memory of 4688	3924	osintool.exe	86
PID 3924 wrote to memory of 4364	3924	osintool.exe	88
PID 3924 wrote to memory of 4364	3924	osintool.exe	88
PID 3924 wrote to memory of 1896	3924	osintool.exe	90
PID 3924 wrote to memory of 1896	3924	osintool.exe	90
PID 3924 wrote to memory of 3264	3924	osintool.exe	92
PID 3924 wrote to memory of 3264	3924	osintool.exe	92
PID 3924 wrote to memory of 2108	3924	osintool.exe	94
PID 3924 wrote to memory of 2108	3924	osintool.exe	94
PID 3924 wrote to memory of 4492	3924	osintool.exe	97
PID 3924 wrote to memory of 4492	3924	osintool.exe	97
PID 3924 wrote to memory of 4772	3924	osintool.exe	99
PID 3924 wrote to memory of 4772	3924	osintool.exe	99
PID 3924 wrote to memory of 2296	3924	osintool.exe	101
PID 3924 wrote to memory of 2296	3924	osintool.exe	101
PID 3924 wrote to memory of 4920	3924	osintool.exe	103
PID 3924 wrote to memory of 4920	3924	osintool.exe	103
PID 3924 wrote to memory of 732	3924	osintool.exe	105
PID 3924 wrote to memory of 732	3924	osintool.exe	105
PID 3924 wrote to memory of 376	3924	osintool.exe	107
PID 3924 wrote to memory of 376	3924	osintool.exe	107
PID 376 wrote to memory of 1836	376	cmd.exe	109
PID 376 wrote to memory of 1836	376	cmd.exe	109

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4688	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:3924
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3624
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\osintool.exe"
  2⤵
  - Views/modifies file attributes
  PID:4688
- 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:4364
- 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
  - Suspicious use of AdjustPrivilegeToken
  PID:1896
- 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
  - Suspicious use of AdjustPrivilegeToken
  PID:3264
- 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:2108
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4492
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4772
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2296
- 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:4920
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:732
- 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:376
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1836

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
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
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
7d938922c60b82c232e1dc1d2cb172d6

SHA1
8c5546fbca478815e77f5dff30fe00e5e5fd6a9a

SHA256
463e9ebf5171ef9ead61019e5fa863ecd958d4390e88079394a98c050ad32a1f

SHA512
479ac4d43bcaea8059ff4ae9023e35f81e2d04eba16b3bec76c1b198891b2b8ea27a03e3862ca73dbe2e98dae5538b007df8418f10c2e3f52c93bcbbae10f105

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

Filesize
1KB

MD5
fff254cb5c3afd42123a4696fea48838

SHA1
2522f8d37166c8202ed692a4f7e44464cb35fe11

SHA256
e27dc87caf719841f1cddfcbd53d9a49278f9da06b13b607799a07141a7adfec

SHA512
4cd8f4dd861947242ba2ff4eb4ac3b07f7afbf5c7b73ead1f3e3052c9976b6f0d5515f661f4dc4b487ecc99ff99a048767e38f925531ec2718fbf300c5d5f7d2

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\__PSScriptPolicyTest_wxdih4he.nss.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3924-72-0x000001A05B560000-0x000001A05B56A000-memory.dmp

Filesize
40KB

Download
memory/3924-35-0x000001A05B510000-0x000001A05B52E000-memory.dmp

Filesize
120KB

Download
memory/3924-95-0x00007FFCC7F00000-0x00007FFCC89C1000-memory.dmp

Filesize
10.8MB

Download
memory/3924-90-0x00007FFCC7F00000-0x00007FFCC89C1000-memory.dmp

Filesize
10.8MB

Download
memory/3924-2-0x00007FFCC7F00000-0x00007FFCC89C1000-memory.dmp

Filesize
10.8MB

Download
memory/3924-33-0x000001A075880000-0x000001A0758F6000-memory.dmp

Filesize
472KB

Download
memory/3924-34-0x000001A05CE30000-0x000001A05CE80000-memory.dmp

Filesize
320KB

Download
memory/3924-89-0x00007FFCC7F03000-0x00007FFCC7F05000-memory.dmp

Filesize
8KB

Download
memory/3924-1-0x000001A05AFF0000-0x000001A05B094000-memory.dmp

Filesize
656KB

Download
memory/3924-0-0x00007FFCC7F03000-0x00007FFCC7F05000-memory.dmp

Filesize
8KB

Download
memory/3924-73-0x000001A05CEA0000-0x000001A05CEB2000-memory.dmp

Filesize
72KB

Download
memory/4364-4-0x00007FFCC7F00000-0x00007FFCC89C1000-memory.dmp

Filesize
10.8MB

Download
memory/4364-5-0x00007FFCC7F00000-0x00007FFCC89C1000-memory.dmp

Filesize
10.8MB

Download
memory/4364-11-0x0000021E74BE0000-0x0000021E74C02000-memory.dmp

Filesize
136KB

Download
memory/4364-3-0x00007FFCC7F00000-0x00007FFCC89C1000-memory.dmp

Filesize
10.8MB

Download
memory/4364-18-0x00007FFCC7F00000-0x00007FFCC89C1000-memory.dmp

Filesize
10.8MB

Download