umbral | 78f8fb8537ad3b8545788459cb6429ebbae3bfca197b6396bf197857789cc32f

Analysis

max time kernel
63s
max time network
80s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05-08-2024 03:06

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General

Target

BootstrapperV1.13.exe
Size

231KB
MD5

282abb0f0ec32631b00061b682a1d930
SHA1

48497f3020dbbe6d1f74654d3df0995ccbee2f16
SHA256

78f8fb8537ad3b8545788459cb6429ebbae3bfca197b6396bf197857789cc32f
SHA512

1a90ccba732d8d4eb6db1b79c496c536f9021cc63a5202619fb7a133b06c61e5875df62c39a532230cdd1ab81c3a9d8b14d80f430925f05eb760a66d63f76ce2
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD4upqVKInDAHZMK7bCD+Qb8e1mipi:joZtL+EP8upqVKInDAHZMK7bCDT5w

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/640-0-0x00000275D51F0000-0x00000275D5230000-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
1568	powershell.exe
3724	powershell.exe
4896	powershell.exe
1676	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	BootstrapperV1.13.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
23	discord.com
24	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
4044	cmd.exe
4544	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4860	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4544	PING.EXE

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
640	BootstrapperV1.13.exe
1568	powershell.exe
1568	powershell.exe
1568	powershell.exe
3724	powershell.exe
3724	powershell.exe
3724	powershell.exe
4896	powershell.exe
4896	powershell.exe
4896	powershell.exe
2216	powershell.exe
2216	powershell.exe
2216	powershell.exe
1676	powershell.exe
1676	powershell.exe
1676	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	640	BootstrapperV1.13.exe
Token: SeIncreaseQuotaPrivilege	4836	wmic.exe
Token: SeSecurityPrivilege	4836	wmic.exe
Token: SeTakeOwnershipPrivilege	4836	wmic.exe
Token: SeLoadDriverPrivilege	4836	wmic.exe
Token: SeSystemProfilePrivilege	4836	wmic.exe
Token: SeSystemtimePrivilege	4836	wmic.exe
Token: SeProfSingleProcessPrivilege	4836	wmic.exe
Token: SeIncBasePriorityPrivilege	4836	wmic.exe
Token: SeCreatePagefilePrivilege	4836	wmic.exe
Token: SeBackupPrivilege	4836	wmic.exe
Token: SeRestorePrivilege	4836	wmic.exe
Token: SeShutdownPrivilege	4836	wmic.exe
Token: SeDebugPrivilege	4836	wmic.exe
Token: SeSystemEnvironmentPrivilege	4836	wmic.exe
Token: SeRemoteShutdownPrivilege	4836	wmic.exe
Token: SeUndockPrivilege	4836	wmic.exe
Token: SeManageVolumePrivilege	4836	wmic.exe
Token: 33	4836	wmic.exe
Token: 34	4836	wmic.exe
Token: 35	4836	wmic.exe
Token: 36	4836	wmic.exe
Token: SeIncreaseQuotaPrivilege	4836	wmic.exe
Token: SeSecurityPrivilege	4836	wmic.exe
Token: SeTakeOwnershipPrivilege	4836	wmic.exe
Token: SeLoadDriverPrivilege	4836	wmic.exe
Token: SeSystemProfilePrivilege	4836	wmic.exe
Token: SeSystemtimePrivilege	4836	wmic.exe
Token: SeProfSingleProcessPrivilege	4836	wmic.exe
Token: SeIncBasePriorityPrivilege	4836	wmic.exe
Token: SeCreatePagefilePrivilege	4836	wmic.exe
Token: SeBackupPrivilege	4836	wmic.exe
Token: SeRestorePrivilege	4836	wmic.exe
Token: SeShutdownPrivilege	4836	wmic.exe
Token: SeDebugPrivilege	4836	wmic.exe
Token: SeSystemEnvironmentPrivilege	4836	wmic.exe
Token: SeRemoteShutdownPrivilege	4836	wmic.exe
Token: SeUndockPrivilege	4836	wmic.exe
Token: SeManageVolumePrivilege	4836	wmic.exe
Token: 33	4836	wmic.exe
Token: 34	4836	wmic.exe
Token: 35	4836	wmic.exe
Token: 36	4836	wmic.exe
Token: SeDebugPrivilege	1568	powershell.exe
Token: SeDebugPrivilege	3724	powershell.exe
Token: SeDebugPrivilege	4896	powershell.exe
Token: SeDebugPrivilege	2216	powershell.exe
Token: SeIncreaseQuotaPrivilege	3344	wmic.exe
Token: SeSecurityPrivilege	3344	wmic.exe
Token: SeTakeOwnershipPrivilege	3344	wmic.exe
Token: SeLoadDriverPrivilege	3344	wmic.exe
Token: SeSystemProfilePrivilege	3344	wmic.exe
Token: SeSystemtimePrivilege	3344	wmic.exe
Token: SeProfSingleProcessPrivilege	3344	wmic.exe
Token: SeIncBasePriorityPrivilege	3344	wmic.exe
Token: SeCreatePagefilePrivilege	3344	wmic.exe
Token: SeBackupPrivilege	3344	wmic.exe
Token: SeRestorePrivilege	3344	wmic.exe
Token: SeShutdownPrivilege	3344	wmic.exe
Token: SeDebugPrivilege	3344	wmic.exe
Token: SeSystemEnvironmentPrivilege	3344	wmic.exe
Token: SeRemoteShutdownPrivilege	3344	wmic.exe
Token: SeUndockPrivilege	3344	wmic.exe
Token: SeManageVolumePrivilege	3344	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 640 wrote to memory of 4836	640	BootstrapperV1.13.exe	90
PID 640 wrote to memory of 4836	640	BootstrapperV1.13.exe	90
PID 640 wrote to memory of 2708	640	BootstrapperV1.13.exe	96
PID 640 wrote to memory of 2708	640	BootstrapperV1.13.exe	96
PID 640 wrote to memory of 1568	640	BootstrapperV1.13.exe	98
PID 640 wrote to memory of 1568	640	BootstrapperV1.13.exe	98
PID 640 wrote to memory of 3724	640	BootstrapperV1.13.exe	100
PID 640 wrote to memory of 3724	640	BootstrapperV1.13.exe	100
PID 640 wrote to memory of 4896	640	BootstrapperV1.13.exe	102
PID 640 wrote to memory of 4896	640	BootstrapperV1.13.exe	102
PID 640 wrote to memory of 2216	640	BootstrapperV1.13.exe	105
PID 640 wrote to memory of 2216	640	BootstrapperV1.13.exe	105
PID 640 wrote to memory of 3344	640	BootstrapperV1.13.exe	107
PID 640 wrote to memory of 3344	640	BootstrapperV1.13.exe	107
PID 640 wrote to memory of 1512	640	BootstrapperV1.13.exe	109
PID 640 wrote to memory of 1512	640	BootstrapperV1.13.exe	109
PID 640 wrote to memory of 2092	640	BootstrapperV1.13.exe	111
PID 640 wrote to memory of 2092	640	BootstrapperV1.13.exe	111
PID 640 wrote to memory of 1676	640	BootstrapperV1.13.exe	113
PID 640 wrote to memory of 1676	640	BootstrapperV1.13.exe	113
PID 640 wrote to memory of 4860	640	BootstrapperV1.13.exe	115
PID 640 wrote to memory of 4860	640	BootstrapperV1.13.exe	115
PID 640 wrote to memory of 4044	640	BootstrapperV1.13.exe	117
PID 640 wrote to memory of 4044	640	BootstrapperV1.13.exe	117
PID 4044 wrote to memory of 4544	4044	cmd.exe	119
PID 4044 wrote to memory of 4544	4044	cmd.exe	119

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2708	attrib.exe

C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe
"C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:640
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4836
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe"
  2⤵
  - Views/modifies file attributes
  PID:2708
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1568
- 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:3724
- 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:4896
- 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:2216
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3344
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1512
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2092
- 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:1676
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4860
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\BootstrapperV1.13.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4044
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:4544

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4344,i,11391966286255097843,10588851088187498028,262144 --variations-seed-version --mojo-platform-channel-handle=4112 /prefetch:8
1⤵
PID:1304

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
c65738617888921a153bd9b1ef516ee7

SHA1
5245e71ea3c181d76320c857b639272ac9e079b1

SHA256
4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26

SHA512
2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa

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
ac057a92f4b62d8880169af0693ef5b2

SHA1
66e7c7834c5dae5cec863ccd69403150d05841f4

SHA256
7cef55990e8e6cfe07e1965b303e79ac562cdc128ab82edf480d9873f72bb3ed

SHA512
d525f47da9e61fc87e55aca6b34e776be3ed081b719bbbb5256705a6afe5fdd4c16d5ee595af13994e2718f789f5fd32830331347d97b029c031c9dfe30c7f49

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cznvnbex.blk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/640-68-0x00000275EF800000-0x00000275EF80A000-memory.dmp

Filesize
40KB

Download
memory/640-35-0x00000275EF7E0000-0x00000275EF7FE000-memory.dmp

Filesize
120KB

Download
memory/640-88-0x00007FFEC0000000-0x00007FFEC0AC1000-memory.dmp

Filesize
10.8MB

Download
memory/640-87-0x00000275EF6D0000-0x00000275EF7D2000-memory.dmp

Filesize
1.0MB

Download
memory/640-2-0x00007FFEC0000000-0x00007FFEC0AC1000-memory.dmp

Filesize
10.8MB

Download
memory/640-33-0x00000275EFAB0000-0x00000275EFB26000-memory.dmp

Filesize
472KB

Download
memory/640-34-0x00000275D6FB0000-0x00000275D7000000-memory.dmp

Filesize
320KB

Download
memory/640-69-0x00000275EF830000-0x00000275EF842000-memory.dmp

Filesize
72KB

Download
memory/640-0-0x00000275D51F0000-0x00000275D5230000-memory.dmp

Filesize
256KB

Download
memory/640-1-0x00007FFEC0003000-0x00007FFEC0005000-memory.dmp

Filesize
8KB

Download
memory/1568-14-0x00007FFEC0000000-0x00007FFEC0AC1000-memory.dmp

Filesize
10.8MB

Download
memory/1568-15-0x00007FFEC0000000-0x00007FFEC0AC1000-memory.dmp

Filesize
10.8MB

Download
memory/1568-13-0x000002063D210000-0x000002063D232000-memory.dmp

Filesize
136KB

Download
memory/1568-3-0x00007FFEC0000000-0x00007FFEC0AC1000-memory.dmp

Filesize
10.8MB

Download
memory/1568-18-0x00007FFEC0000000-0x00007FFEC0AC1000-memory.dmp

Filesize
10.8MB

Download