umbral | 4fec5552f2a39ddd4bdcfd316ac96ecf9f6a413fb3a674d058d1695b88c8db5f

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
28-07-2024 16:14

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General

Target

dead-builder.exe
Size

254KB
MD5

a57179fa58b196077b35da7eb4032a18
SHA1

92a6d5ac92fe534fa1c5cdb45bc95135ef3effad
SHA256

4fec5552f2a39ddd4bdcfd316ac96ecf9f6a413fb3a674d058d1695b88c8db5f
SHA512

d66f89a6f1b76e64de7f163a9cf4c31b1fcd2b1129800c1659f50d2a23e67e93820f64624ebacd25eeee193fee6e96a849f42687f5b4be9bdf8cab53f7ef31d7
SSDEEP

6144:K4oZoAeVHPtHgTIAaZgCwDx7axHU0unC28ejI8x7:xoZyHPvWCwjXCsIM

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1668-1-0x000001AC03DC0000-0x000001AC03E06000-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
892	powershell.exe
2944	powershell.exe
1968	powershell.exe
1828	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	dead-builder.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
32	discord.com
33	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
11	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
864	PING.EXE
3088	cmd.exe

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1324	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
864	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1668	dead-builder.exe
892	powershell.exe
892	powershell.exe
2944	powershell.exe
2944	powershell.exe
1968	powershell.exe
1968	powershell.exe
1708	powershell.exe
1708	powershell.exe
1828	powershell.exe
1828	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1668	dead-builder.exe
Token: SeIncreaseQuotaPrivilege	2836	wmic.exe
Token: SeSecurityPrivilege	2836	wmic.exe
Token: SeTakeOwnershipPrivilege	2836	wmic.exe
Token: SeLoadDriverPrivilege	2836	wmic.exe
Token: SeSystemProfilePrivilege	2836	wmic.exe
Token: SeSystemtimePrivilege	2836	wmic.exe
Token: SeProfSingleProcessPrivilege	2836	wmic.exe
Token: SeIncBasePriorityPrivilege	2836	wmic.exe
Token: SeCreatePagefilePrivilege	2836	wmic.exe
Token: SeBackupPrivilege	2836	wmic.exe
Token: SeRestorePrivilege	2836	wmic.exe
Token: SeShutdownPrivilege	2836	wmic.exe
Token: SeDebugPrivilege	2836	wmic.exe
Token: SeSystemEnvironmentPrivilege	2836	wmic.exe
Token: SeRemoteShutdownPrivilege	2836	wmic.exe
Token: SeUndockPrivilege	2836	wmic.exe
Token: SeManageVolumePrivilege	2836	wmic.exe
Token: 33	2836	wmic.exe
Token: 34	2836	wmic.exe
Token: 35	2836	wmic.exe
Token: 36	2836	wmic.exe
Token: SeIncreaseQuotaPrivilege	2836	wmic.exe
Token: SeSecurityPrivilege	2836	wmic.exe
Token: SeTakeOwnershipPrivilege	2836	wmic.exe
Token: SeLoadDriverPrivilege	2836	wmic.exe
Token: SeSystemProfilePrivilege	2836	wmic.exe
Token: SeSystemtimePrivilege	2836	wmic.exe
Token: SeProfSingleProcessPrivilege	2836	wmic.exe
Token: SeIncBasePriorityPrivilege	2836	wmic.exe
Token: SeCreatePagefilePrivilege	2836	wmic.exe
Token: SeBackupPrivilege	2836	wmic.exe
Token: SeRestorePrivilege	2836	wmic.exe
Token: SeShutdownPrivilege	2836	wmic.exe
Token: SeDebugPrivilege	2836	wmic.exe
Token: SeSystemEnvironmentPrivilege	2836	wmic.exe
Token: SeRemoteShutdownPrivilege	2836	wmic.exe
Token: SeUndockPrivilege	2836	wmic.exe
Token: SeManageVolumePrivilege	2836	wmic.exe
Token: 33	2836	wmic.exe
Token: 34	2836	wmic.exe
Token: 35	2836	wmic.exe
Token: 36	2836	wmic.exe
Token: SeDebugPrivilege	892	powershell.exe
Token: SeDebugPrivilege	2944	powershell.exe
Token: SeDebugPrivilege	1968	powershell.exe
Token: SeDebugPrivilege	1708	powershell.exe
Token: SeIncreaseQuotaPrivilege	3224	wmic.exe
Token: SeSecurityPrivilege	3224	wmic.exe
Token: SeTakeOwnershipPrivilege	3224	wmic.exe
Token: SeLoadDriverPrivilege	3224	wmic.exe
Token: SeSystemProfilePrivilege	3224	wmic.exe
Token: SeSystemtimePrivilege	3224	wmic.exe
Token: SeProfSingleProcessPrivilege	3224	wmic.exe
Token: SeIncBasePriorityPrivilege	3224	wmic.exe
Token: SeCreatePagefilePrivilege	3224	wmic.exe
Token: SeBackupPrivilege	3224	wmic.exe
Token: SeRestorePrivilege	3224	wmic.exe
Token: SeShutdownPrivilege	3224	wmic.exe
Token: SeDebugPrivilege	3224	wmic.exe
Token: SeSystemEnvironmentPrivilege	3224	wmic.exe
Token: SeRemoteShutdownPrivilege	3224	wmic.exe
Token: SeUndockPrivilege	3224	wmic.exe
Token: SeManageVolumePrivilege	3224	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 2836	1668	dead-builder.exe	87
PID 1668 wrote to memory of 2836	1668	dead-builder.exe	87
PID 1668 wrote to memory of 2624	1668	dead-builder.exe	90
PID 1668 wrote to memory of 2624	1668	dead-builder.exe	90
PID 1668 wrote to memory of 892	1668	dead-builder.exe	92
PID 1668 wrote to memory of 892	1668	dead-builder.exe	92
PID 1668 wrote to memory of 2944	1668	dead-builder.exe	118
PID 1668 wrote to memory of 2944	1668	dead-builder.exe	118
PID 1668 wrote to memory of 1968	1668	dead-builder.exe	96
PID 1668 wrote to memory of 1968	1668	dead-builder.exe	96
PID 1668 wrote to memory of 1708	1668	dead-builder.exe	98
PID 1668 wrote to memory of 1708	1668	dead-builder.exe	98
PID 1668 wrote to memory of 3224	1668	dead-builder.exe	103
PID 1668 wrote to memory of 3224	1668	dead-builder.exe	103
PID 1668 wrote to memory of 1120	1668	dead-builder.exe	105
PID 1668 wrote to memory of 1120	1668	dead-builder.exe	105
PID 1668 wrote to memory of 2212	1668	dead-builder.exe	107
PID 1668 wrote to memory of 2212	1668	dead-builder.exe	107
PID 1668 wrote to memory of 1828	1668	dead-builder.exe	109
PID 1668 wrote to memory of 1828	1668	dead-builder.exe	109
PID 1668 wrote to memory of 1324	1668	dead-builder.exe	111
PID 1668 wrote to memory of 1324	1668	dead-builder.exe	111
PID 1668 wrote to memory of 3088	1668	dead-builder.exe	114
PID 1668 wrote to memory of 3088	1668	dead-builder.exe	114
PID 3088 wrote to memory of 864	3088	cmd.exe	116
PID 3088 wrote to memory of 864	3088	cmd.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2624	attrib.exe

C:\Users\Admin\AppData\Local\Temp\dead-builder.exe
"C:\Users\Admin\AppData\Local\Temp\dead-builder.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2836
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\dead-builder.exe"
  2⤵
  - Views/modifies file attributes
  PID:2624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\dead-builder.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:892
- 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:2944
- 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:1968
- 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:1708
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3224
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1120
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2212
- 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:1828
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1324
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\dead-builder.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3088
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:864

C:\Windows\System32\mousocoreworker.exe
C:\Windows\System32\mousocoreworker.exe -Embedding
1⤵
PID:2944

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
59d97011e091004eaffb9816aa0b9abd

SHA1
1602a56b01dd4b7c577ca27d3117e4bcc1aa657b

SHA256
18f381e0db020a763b8c515c346ef58679ab9c403267eacfef5359e272f7e71d

SHA512
d9ca49c1a17580981e2c1a50d73c0eecaa7a62f8514741512172e395af2a3d80aeb0f71c58bc7f52c18246d57ba67af09b6bff4776877d6cc6f0245c30e092d6

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

Filesize
948B

MD5
7d938922c60b82c232e1dc1d2cb172d6

SHA1
8c5546fbca478815e77f5dff30fe00e5e5fd6a9a

SHA256
463e9ebf5171ef9ead61019e5fa863ecd958d4390e88079394a98c050ad32a1f

SHA512
479ac4d43bcaea8059ff4ae9023e35f81e2d04eba16b3bec76c1b198891b2b8ea27a03e3862ca73dbe2e98dae5538b007df8418f10c2e3f52c93bcbbae10f105

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

Filesize
1KB

MD5
6efe8a3d89f73eb15e0172e45bb6f12a

SHA1
997e68a52c8090f63ab578e0c3cb05d02e90e49e

SHA256
7378933ba0be7ca569ef4805c781e8c7d2bed91cda8ee1fa7310c500e80beb5d

SHA512
f57ec9205d03bf64c043e740656d8176946669bce0115dfe21e132182af1d1f623017cbb39b75a83e321cd0a8003c4641ce8ffe072407f281b0c77806c92906c

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

Filesize
1KB

MD5
3d01e358e0e38d2de2b1c8f6c708e1fb

SHA1
b77b16c948e43c38f69d69b3f0fdfb06ac04d313

SHA256
dd1471321d37dd3d90fff77017a88b5de9b8a59294b9c8ca2d02cae7350323df

SHA512
48b310cf2605f21ec103d972a20d521da76c4233e63ffcfa3c30c45021c7ebe02e99399d0f2d5d8c13afc0318bff4ea19a5a3bb5e753f4524cbf29a73f40261e

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uxvlaimp.jkq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/892-9-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/892-14-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/892-15-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/892-18-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/892-3-0x0000020BF2C50000-0x0000020BF2C72000-memory.dmp

Filesize
136KB

Download
memory/1668-34-0x000001AC05B90000-0x000001AC05BE0000-memory.dmp

Filesize
320KB

Download
memory/1668-33-0x000001AC1E530000-0x000001AC1E5A6000-memory.dmp

Filesize
472KB

Download
memory/1668-40-0x000001AC05B60000-0x000001AC05B7E000-memory.dmp

Filesize
120KB

Download
memory/1668-1-0x000001AC03DC0000-0x000001AC03E06000-memory.dmp

Filesize
280KB

Download
memory/1668-0-0x00007FF86A553000-0x00007FF86A555000-memory.dmp

Filesize
8KB

Download
memory/1668-71-0x000001AC05BF0000-0x000001AC05BFA000-memory.dmp

Filesize
40KB

Download
memory/1668-72-0x000001AC1E8F0000-0x000001AC1E902000-memory.dmp

Filesize
72KB

Download
memory/1668-2-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download
memory/1668-90-0x00007FF86A550000-0x00007FF86B011000-memory.dmp

Filesize
10.8MB

Download