umbral | fc1ad8d1483f0b1c94b55be7b7587b86485022ca4e62e6fb0c06e392dfaeecd2

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
19-04-2024 20:56

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General

Target

C11Bootstrapper/Properties/GuiLoader.exe
Size

246KB
MD5

1bb249792e56063762f5adb2d94fc8c9
SHA1

9a1fa4886ed023f864c06345b639a121f6359cd1
SHA256

f61483bd59316dff21d5bc3fc8f32811dd8ddca826a84255ab5ea2cdfef3d7ae
SHA512

d8a2af35713bf4ce979440375c460b9f7b3f2849abc9cdf0d2fdb5e891a5bab36ed101da94f6b57d3dc775c3a0fdeffbaeab8981965ec72fe56adfa5dab501ba
SSDEEP

6144:RloZM+rIkd8g+EtXHkv/iD4kgOZGCg/7I7R0STTKvYb8e1mZzi:joZtL+EP8kgOZGCg/7I7R0STTKIX

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral4/memory/3516-0-0x0000013FB24E0000-0x0000013FB2524000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	GuiLoader.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
35	discord.com
36	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

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3268	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4668	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3516	GuiLoader.exe
5056	powershell.exe
5056	powershell.exe
3800	powershell.exe
3800	powershell.exe
2936	powershell.exe
2936	powershell.exe
3984	powershell.exe
3984	powershell.exe
4268	powershell.exe
4268	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3516	GuiLoader.exe
Token: SeIncreaseQuotaPrivilege	3540	wmic.exe
Token: SeSecurityPrivilege	3540	wmic.exe
Token: SeTakeOwnershipPrivilege	3540	wmic.exe
Token: SeLoadDriverPrivilege	3540	wmic.exe
Token: SeSystemProfilePrivilege	3540	wmic.exe
Token: SeSystemtimePrivilege	3540	wmic.exe
Token: SeProfSingleProcessPrivilege	3540	wmic.exe
Token: SeIncBasePriorityPrivilege	3540	wmic.exe
Token: SeCreatePagefilePrivilege	3540	wmic.exe
Token: SeBackupPrivilege	3540	wmic.exe
Token: SeRestorePrivilege	3540	wmic.exe
Token: SeShutdownPrivilege	3540	wmic.exe
Token: SeDebugPrivilege	3540	wmic.exe
Token: SeSystemEnvironmentPrivilege	3540	wmic.exe
Token: SeRemoteShutdownPrivilege	3540	wmic.exe
Token: SeUndockPrivilege	3540	wmic.exe
Token: SeManageVolumePrivilege	3540	wmic.exe
Token: 33	3540	wmic.exe
Token: 34	3540	wmic.exe
Token: 35	3540	wmic.exe
Token: 36	3540	wmic.exe
Token: SeIncreaseQuotaPrivilege	3540	wmic.exe
Token: SeSecurityPrivilege	3540	wmic.exe
Token: SeTakeOwnershipPrivilege	3540	wmic.exe
Token: SeLoadDriverPrivilege	3540	wmic.exe
Token: SeSystemProfilePrivilege	3540	wmic.exe
Token: SeSystemtimePrivilege	3540	wmic.exe
Token: SeProfSingleProcessPrivilege	3540	wmic.exe
Token: SeIncBasePriorityPrivilege	3540	wmic.exe
Token: SeCreatePagefilePrivilege	3540	wmic.exe
Token: SeBackupPrivilege	3540	wmic.exe
Token: SeRestorePrivilege	3540	wmic.exe
Token: SeShutdownPrivilege	3540	wmic.exe
Token: SeDebugPrivilege	3540	wmic.exe
Token: SeSystemEnvironmentPrivilege	3540	wmic.exe
Token: SeRemoteShutdownPrivilege	3540	wmic.exe
Token: SeUndockPrivilege	3540	wmic.exe
Token: SeManageVolumePrivilege	3540	wmic.exe
Token: 33	3540	wmic.exe
Token: 34	3540	wmic.exe
Token: 35	3540	wmic.exe
Token: 36	3540	wmic.exe
Token: SeDebugPrivilege	5056	powershell.exe
Token: SeDebugPrivilege	3800	powershell.exe
Token: SeDebugPrivilege	2936	powershell.exe
Token: SeDebugPrivilege	3984	powershell.exe
Token: SeIncreaseQuotaPrivilege	2416	wmic.exe
Token: SeSecurityPrivilege	2416	wmic.exe
Token: SeTakeOwnershipPrivilege	2416	wmic.exe
Token: SeLoadDriverPrivilege	2416	wmic.exe
Token: SeSystemProfilePrivilege	2416	wmic.exe
Token: SeSystemtimePrivilege	2416	wmic.exe
Token: SeProfSingleProcessPrivilege	2416	wmic.exe
Token: SeIncBasePriorityPrivilege	2416	wmic.exe
Token: SeCreatePagefilePrivilege	2416	wmic.exe
Token: SeBackupPrivilege	2416	wmic.exe
Token: SeRestorePrivilege	2416	wmic.exe
Token: SeShutdownPrivilege	2416	wmic.exe
Token: SeDebugPrivilege	2416	wmic.exe
Token: SeSystemEnvironmentPrivilege	2416	wmic.exe
Token: SeRemoteShutdownPrivilege	2416	wmic.exe
Token: SeUndockPrivilege	2416	wmic.exe
Token: SeManageVolumePrivilege	2416	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3516 wrote to memory of 3540	3516	GuiLoader.exe	87
PID 3516 wrote to memory of 3540	3516	GuiLoader.exe	87
PID 3516 wrote to memory of 1452	3516	GuiLoader.exe	90
PID 3516 wrote to memory of 1452	3516	GuiLoader.exe	90
PID 3516 wrote to memory of 5056	3516	GuiLoader.exe	92
PID 3516 wrote to memory of 5056	3516	GuiLoader.exe	92
PID 3516 wrote to memory of 3800	3516	GuiLoader.exe	94
PID 3516 wrote to memory of 3800	3516	GuiLoader.exe	94
PID 3516 wrote to memory of 2936	3516	GuiLoader.exe	96
PID 3516 wrote to memory of 2936	3516	GuiLoader.exe	96
PID 3516 wrote to memory of 3984	3516	GuiLoader.exe	98
PID 3516 wrote to memory of 3984	3516	GuiLoader.exe	98
PID 3516 wrote to memory of 2416	3516	GuiLoader.exe	100
PID 3516 wrote to memory of 2416	3516	GuiLoader.exe	100
PID 3516 wrote to memory of 3660	3516	GuiLoader.exe	102
PID 3516 wrote to memory of 3660	3516	GuiLoader.exe	102
PID 3516 wrote to memory of 3820	3516	GuiLoader.exe	105
PID 3516 wrote to memory of 3820	3516	GuiLoader.exe	105
PID 3516 wrote to memory of 4268	3516	GuiLoader.exe	107
PID 3516 wrote to memory of 4268	3516	GuiLoader.exe	107
PID 3516 wrote to memory of 3268	3516	GuiLoader.exe	109
PID 3516 wrote to memory of 3268	3516	GuiLoader.exe	109
PID 3516 wrote to memory of 2492	3516	GuiLoader.exe	116
PID 3516 wrote to memory of 2492	3516	GuiLoader.exe	116
PID 2492 wrote to memory of 4668	2492	cmd.exe	118
PID 2492 wrote to memory of 4668	2492	cmd.exe	118

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1452	attrib.exe

C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe
"C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3540
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe"
  2⤵
  - Views/modifies file attributes
  PID:1452
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5056
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3800
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2936
- 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:3984
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2416
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3660
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3820
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:4268
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3268
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\C11Bootstrapper\Properties\GuiLoader.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2492
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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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
1KB

MD5
92382908106bf04aac6575ae0e55073f

SHA1
b164dd606b60ada42fe843963f95e14e92d5d86a

SHA256
1332dc373efa610424b48ae9955247275f4f94cfeecec93a5121784ed8d6b3db

SHA512
d6ee3e3776f683b2a4eaf4fd92e2cd2b9412d85fb57556130d8cabf52e180fb17b5dcdfec9ccd0b3b80bed2816c0bd2d25de35580b859e7799b7cb61071edb3f

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

Filesize
944B

MD5
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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\Temp\__PSScriptPolicyTest_mrusvwsp.bdu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2936-66-0x0000019504620000-0x0000019504630000-memory.dmp

Filesize
64KB

Download
memory/2936-68-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/2936-43-0x0000019504620000-0x0000019504630000-memory.dmp

Filesize
64KB

Download
memory/2936-42-0x0000019504620000-0x0000019504630000-memory.dmp

Filesize
64KB

Download
memory/2936-41-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/3516-2-0x0000013FCCA20000-0x0000013FCCA30000-memory.dmp

Filesize
64KB

Download
memory/3516-71-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/3516-87-0x0000013FCCDE0000-0x0000013FCCDEA000-memory.dmp

Filesize
40KB

Download
memory/3516-110-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/3516-1-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/3516-38-0x0000013FCCC10000-0x0000013FCCC86000-memory.dmp

Filesize
472KB

Download
memory/3516-39-0x0000013FCCC90000-0x0000013FCCCE0000-memory.dmp

Filesize
320KB

Download
memory/3516-40-0x0000013FCCBD0000-0x0000013FCCBEE000-memory.dmp

Filesize
120KB

Download
memory/3516-0-0x0000013FB24E0000-0x0000013FB2524000-memory.dmp

Filesize
272KB

Download
memory/3516-88-0x0000013FCCE10000-0x0000013FCCE22000-memory.dmp

Filesize
72KB

Download
memory/3516-85-0x0000013FCCA20000-0x0000013FCCA30000-memory.dmp

Filesize
64KB

Download
memory/3800-20-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/3800-35-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/3800-33-0x000001DA9B5E0000-0x000001DA9B5F0000-memory.dmp

Filesize
64KB

Download
memory/3800-22-0x000001DA9B5E0000-0x000001DA9B5F0000-memory.dmp

Filesize
64KB

Download
memory/3800-21-0x000001DA9B5E0000-0x000001DA9B5F0000-memory.dmp

Filesize
64KB

Download
memory/3984-69-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/3984-70-0x000002425FE70000-0x000002425FE80000-memory.dmp

Filesize
64KB

Download
memory/3984-82-0x000002425FE70000-0x000002425FE80000-memory.dmp

Filesize
64KB

Download
memory/3984-84-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/4268-101-0x00000186486E0000-0x00000186486F0000-memory.dmp

Filesize
64KB

Download
memory/4268-102-0x00000186486E0000-0x00000186486F0000-memory.dmp

Filesize
64KB

Download
memory/4268-91-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/4268-105-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/5056-15-0x0000020D75C70000-0x0000020D75C80000-memory.dmp

Filesize
64KB

Download
memory/5056-14-0x0000020D75C70000-0x0000020D75C80000-memory.dmp

Filesize
64KB

Download
memory/5056-18-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download
memory/5056-3-0x0000020D75C80000-0x0000020D75CA2000-memory.dmp

Filesize
136KB

Download
memory/5056-4-0x00007FFC2C820000-0x00007FFC2D2E1000-memory.dmp

Filesize
10.8MB

Download