umbral | 38264c8656ce4163c7d1cf3014863dc7398227df662b90a30c6342d6f45bb5a6

Analysis

max time kernel
1501s
max time network
1500s
platform
windows11-21h2_x64
resource
win11-20240412-en
resource tags

arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
submitted
19-04-2024 21:10

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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
behavioral1/memory/4516-0-0x000002447E630000-0x000002447E674000-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
5	discord.com
1	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
1	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4452	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2676	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4516	GuiLoader.exe
4128	powershell.exe
4128	powershell.exe
4784	powershell.exe
4784	powershell.exe
2960	powershell.exe
2960	powershell.exe
2212	powershell.exe
2212	powershell.exe
3128	powershell.exe
3128	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4516	GuiLoader.exe
Token: SeIncreaseQuotaPrivilege	4224	wmic.exe
Token: SeSecurityPrivilege	4224	wmic.exe
Token: SeTakeOwnershipPrivilege	4224	wmic.exe
Token: SeLoadDriverPrivilege	4224	wmic.exe
Token: SeSystemProfilePrivilege	4224	wmic.exe
Token: SeSystemtimePrivilege	4224	wmic.exe
Token: SeProfSingleProcessPrivilege	4224	wmic.exe
Token: SeIncBasePriorityPrivilege	4224	wmic.exe
Token: SeCreatePagefilePrivilege	4224	wmic.exe
Token: SeBackupPrivilege	4224	wmic.exe
Token: SeRestorePrivilege	4224	wmic.exe
Token: SeShutdownPrivilege	4224	wmic.exe
Token: SeDebugPrivilege	4224	wmic.exe
Token: SeSystemEnvironmentPrivilege	4224	wmic.exe
Token: SeRemoteShutdownPrivilege	4224	wmic.exe
Token: SeUndockPrivilege	4224	wmic.exe
Token: SeManageVolumePrivilege	4224	wmic.exe
Token: 33	4224	wmic.exe
Token: 34	4224	wmic.exe
Token: 35	4224	wmic.exe
Token: 36	4224	wmic.exe
Token: SeIncreaseQuotaPrivilege	4224	wmic.exe
Token: SeSecurityPrivilege	4224	wmic.exe
Token: SeTakeOwnershipPrivilege	4224	wmic.exe
Token: SeLoadDriverPrivilege	4224	wmic.exe
Token: SeSystemProfilePrivilege	4224	wmic.exe
Token: SeSystemtimePrivilege	4224	wmic.exe
Token: SeProfSingleProcessPrivilege	4224	wmic.exe
Token: SeIncBasePriorityPrivilege	4224	wmic.exe
Token: SeCreatePagefilePrivilege	4224	wmic.exe
Token: SeBackupPrivilege	4224	wmic.exe
Token: SeRestorePrivilege	4224	wmic.exe
Token: SeShutdownPrivilege	4224	wmic.exe
Token: SeDebugPrivilege	4224	wmic.exe
Token: SeSystemEnvironmentPrivilege	4224	wmic.exe
Token: SeRemoteShutdownPrivilege	4224	wmic.exe
Token: SeUndockPrivilege	4224	wmic.exe
Token: SeManageVolumePrivilege	4224	wmic.exe
Token: 33	4224	wmic.exe
Token: 34	4224	wmic.exe
Token: 35	4224	wmic.exe
Token: 36	4224	wmic.exe
Token: SeDebugPrivilege	4128	powershell.exe
Token: SeDebugPrivilege	4784	powershell.exe
Token: SeDebugPrivilege	2960	powershell.exe
Token: SeDebugPrivilege	2212	powershell.exe
Token: SeIncreaseQuotaPrivilege	1940	wmic.exe
Token: SeSecurityPrivilege	1940	wmic.exe
Token: SeTakeOwnershipPrivilege	1940	wmic.exe
Token: SeLoadDriverPrivilege	1940	wmic.exe
Token: SeSystemProfilePrivilege	1940	wmic.exe
Token: SeSystemtimePrivilege	1940	wmic.exe
Token: SeProfSingleProcessPrivilege	1940	wmic.exe
Token: SeIncBasePriorityPrivilege	1940	wmic.exe
Token: SeCreatePagefilePrivilege	1940	wmic.exe
Token: SeBackupPrivilege	1940	wmic.exe
Token: SeRestorePrivilege	1940	wmic.exe
Token: SeShutdownPrivilege	1940	wmic.exe
Token: SeDebugPrivilege	1940	wmic.exe
Token: SeSystemEnvironmentPrivilege	1940	wmic.exe
Token: SeRemoteShutdownPrivilege	1940	wmic.exe
Token: SeUndockPrivilege	1940	wmic.exe
Token: SeManageVolumePrivilege	1940	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4516 wrote to memory of 4224	4516	GuiLoader.exe	80
PID 4516 wrote to memory of 4224	4516	GuiLoader.exe	80
PID 4516 wrote to memory of 1760	4516	GuiLoader.exe	83
PID 4516 wrote to memory of 1760	4516	GuiLoader.exe	83
PID 4516 wrote to memory of 4128	4516	GuiLoader.exe	85
PID 4516 wrote to memory of 4128	4516	GuiLoader.exe	85
PID 4516 wrote to memory of 4784	4516	GuiLoader.exe	87
PID 4516 wrote to memory of 4784	4516	GuiLoader.exe	87
PID 4516 wrote to memory of 2960	4516	GuiLoader.exe	89
PID 4516 wrote to memory of 2960	4516	GuiLoader.exe	89
PID 4516 wrote to memory of 2212	4516	GuiLoader.exe	91
PID 4516 wrote to memory of 2212	4516	GuiLoader.exe	91
PID 4516 wrote to memory of 1940	4516	GuiLoader.exe	93
PID 4516 wrote to memory of 1940	4516	GuiLoader.exe	93
PID 4516 wrote to memory of 4860	4516	GuiLoader.exe	95
PID 4516 wrote to memory of 4860	4516	GuiLoader.exe	95
PID 4516 wrote to memory of 4148	4516	GuiLoader.exe	97
PID 4516 wrote to memory of 4148	4516	GuiLoader.exe	97
PID 4516 wrote to memory of 3128	4516	GuiLoader.exe	99
PID 4516 wrote to memory of 3128	4516	GuiLoader.exe	99
PID 4516 wrote to memory of 4452	4516	GuiLoader.exe	101
PID 4516 wrote to memory of 4452	4516	GuiLoader.exe	101
PID 4516 wrote to memory of 2796	4516	GuiLoader.exe	103
PID 4516 wrote to memory of 2796	4516	GuiLoader.exe	103
PID 2796 wrote to memory of 2676	2796	cmd.exe	105
PID 2796 wrote to memory of 2676	2796	cmd.exe	105

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
1760	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:4516
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4224
- 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:1760
- 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:4128
- 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:4784
- 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:2960
- 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:2212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1940
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4860
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4148
- 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:3128
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4452
- 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:2796
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2676

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
1a9fa92a4f2e2ec9e244d43a6a4f8fb9

SHA1
9910190edfaccece1dfcc1d92e357772f5dae8f7

SHA256
0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

SHA512
5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

Filesize
948B

MD5
45741c307af2576c6437c5fdb24ef9ce

SHA1
a6ba7a7705db14ac29a18a98dd7deb4cc759c3bf

SHA256
7887859f7179e194ff9b78f8d8fa3830790110a01597f21ff48c84cd935e49d2

SHA512
39fdc5931563cbf826e8b643b5f0dcdf45bb6f95a8eeb460499257ca41b3dbee4c692eaacc3fd33bddf4b6ff0c828981ed7e9cd080007bbb9f0b28e7d0d66941

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

Filesize
1KB

MD5
7332074ae2b01262736b6fbd9e100dac

SHA1
22f992165065107cc9417fa4117240d84414a13c

SHA256
baea84fda6c1f13090b8cbd91c920848946f10ce155ef31a1df4cd453ee7e4aa

SHA512
4ae6f0e012c31ac1fc2ff4a8877ce2b4667c45b6e651de798318a39a2b6fd39a6f72dffa8b0b89b7a045a27d724d195656faa25a9fec79b22f37ddebb5d22da2

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

Filesize
1KB

MD5
38ecc5b95c11e5a77558753102979c51

SHA1
c0759b08ef377df9979d8835d8a7e464cd8eaf6b

SHA256
2eb69abe0af5a2fb5bb313533cef641e25016876b874353f7d737c7ad672c79e

SHA512
9bf4ce3bc097bdd0242bd105c936a9c9403d5ac83ec99e6a310591a7b8d26309485f3e0cdc4cba67c322f834c325a2b63a008adb078f3a3307094c4b68a48686

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2ew2pys0.1ai.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2212-78-0x0000019EEDF50000-0x0000019EEDF60000-memory.dmp

Filesize
64KB

Download
memory/2212-81-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/2212-79-0x0000019EEDF50000-0x0000019EEDF60000-memory.dmp

Filesize
64KB

Download
memory/2212-77-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/2960-44-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/2960-66-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/2960-64-0x000001218F780000-0x000001218F790000-memory.dmp

Filesize
64KB

Download
memory/2960-54-0x000001218F780000-0x000001218F790000-memory.dmp

Filesize
64KB

Download
memory/2960-45-0x000001218F780000-0x000001218F790000-memory.dmp

Filesize
64KB

Download
memory/3128-100-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/3128-98-0x000001C753810000-0x000001C753820000-memory.dmp

Filesize
64KB

Download
memory/3128-96-0x000001C753810000-0x000001C753820000-memory.dmp

Filesize
64KB

Download
memory/3128-95-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/4128-3-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/4128-4-0x000001F5741E0000-0x000001F5741F0000-memory.dmp

Filesize
64KB

Download
memory/4128-15-0x000001F5741E0000-0x000001F5741F0000-memory.dmp

Filesize
64KB

Download
memory/4128-18-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/4128-14-0x000001F5741F0000-0x000001F574212000-memory.dmp

Filesize
136KB

Download
memory/4128-5-0x000001F5741E0000-0x000001F5741F0000-memory.dmp

Filesize
64KB

Download
memory/4516-1-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/4516-39-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/4516-2-0x000002447EE80000-0x000002447EE90000-memory.dmp

Filesize
64KB

Download
memory/4516-105-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/4516-38-0x000002447F050000-0x000002447F06E000-memory.dmp

Filesize
120KB

Download
memory/4516-0-0x000002447E630000-0x000002447E674000-memory.dmp

Filesize
272KB

Download
memory/4516-37-0x000002447FA90000-0x000002447FAE0000-memory.dmp

Filesize
320KB

Download
memory/4516-84-0x000002447F9B0000-0x000002447F9C2000-memory.dmp

Filesize
72KB

Download
memory/4516-83-0x000002447F040000-0x000002447F04A000-memory.dmp

Filesize
40KB

Download
memory/4516-36-0x000002447FA10000-0x000002447FA86000-memory.dmp

Filesize
472KB

Download
memory/4516-67-0x000002447EE80000-0x000002447EE90000-memory.dmp

Filesize
64KB

Download
memory/4784-28-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download
memory/4784-29-0x0000016E6F3A0000-0x0000016E6F3B0000-memory.dmp

Filesize
64KB

Download
memory/4784-30-0x0000016E6F3A0000-0x0000016E6F3B0000-memory.dmp

Filesize
64KB

Download
memory/4784-33-0x00007FFF79EB0000-0x00007FFF7A972000-memory.dmp

Filesize
10.8MB

Download