umbral | b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361

Analysis

max time kernel
94s
max time network
102s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
25-01-2025 00:39

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General

Target

b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe
Size

229KB
MD5

279b7dad4be41fbc9bdefe4e7a47e894
SHA1

6d07ef9bff3877c69ecc3755c5aeada418c7225a
SHA256

b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361
SHA512

36d0a56e4c4918ed0d0ba42b8f424f9fee8a88f10649a8e18a09e99a8f2333d932e6c56243f7f75b34afae595ba58b90383b86aecc4b9046a00effec592ea748
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD4/E0fAmB5Kz/Cwhl0Adb8e1mc3liI:voZtL+EP8/E0fAmB5Kz/Cwhl007cI

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3048-1-0x00000231EFB10000-0x00000231EFB50000-memory.dmp	family_umbral

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

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
2620	powershell.exe
2108	powershell.exe
5044	powershell.exe
2904	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe

Reads user/profile data of web browsers 3 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

Credentials from Web Browsers
T1555.003

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	discord.com
22	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
8	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
5080	cmd.exe
1408	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4552	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1408	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe
2620	powershell.exe
2620	powershell.exe
5044	powershell.exe
5044	powershell.exe
2904	powershell.exe
2904	powershell.exe
1616	powershell.exe
1616	powershell.exe
2108	powershell.exe
2108	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe
Token: SeIncreaseQuotaPrivilege	1888	wmic.exe
Token: SeSecurityPrivilege	1888	wmic.exe
Token: SeTakeOwnershipPrivilege	1888	wmic.exe
Token: SeLoadDriverPrivilege	1888	wmic.exe
Token: SeSystemProfilePrivilege	1888	wmic.exe
Token: SeSystemtimePrivilege	1888	wmic.exe
Token: SeProfSingleProcessPrivilege	1888	wmic.exe
Token: SeIncBasePriorityPrivilege	1888	wmic.exe
Token: SeCreatePagefilePrivilege	1888	wmic.exe
Token: SeBackupPrivilege	1888	wmic.exe
Token: SeRestorePrivilege	1888	wmic.exe
Token: SeShutdownPrivilege	1888	wmic.exe
Token: SeDebugPrivilege	1888	wmic.exe
Token: SeSystemEnvironmentPrivilege	1888	wmic.exe
Token: SeRemoteShutdownPrivilege	1888	wmic.exe
Token: SeUndockPrivilege	1888	wmic.exe
Token: SeManageVolumePrivilege	1888	wmic.exe
Token: 33	1888	wmic.exe
Token: 34	1888	wmic.exe
Token: 35	1888	wmic.exe
Token: 36	1888	wmic.exe
Token: SeIncreaseQuotaPrivilege	1888	wmic.exe
Token: SeSecurityPrivilege	1888	wmic.exe
Token: SeTakeOwnershipPrivilege	1888	wmic.exe
Token: SeLoadDriverPrivilege	1888	wmic.exe
Token: SeSystemProfilePrivilege	1888	wmic.exe
Token: SeSystemtimePrivilege	1888	wmic.exe
Token: SeProfSingleProcessPrivilege	1888	wmic.exe
Token: SeIncBasePriorityPrivilege	1888	wmic.exe
Token: SeCreatePagefilePrivilege	1888	wmic.exe
Token: SeBackupPrivilege	1888	wmic.exe
Token: SeRestorePrivilege	1888	wmic.exe
Token: SeShutdownPrivilege	1888	wmic.exe
Token: SeDebugPrivilege	1888	wmic.exe
Token: SeSystemEnvironmentPrivilege	1888	wmic.exe
Token: SeRemoteShutdownPrivilege	1888	wmic.exe
Token: SeUndockPrivilege	1888	wmic.exe
Token: SeManageVolumePrivilege	1888	wmic.exe
Token: 33	1888	wmic.exe
Token: 34	1888	wmic.exe
Token: 35	1888	wmic.exe
Token: 36	1888	wmic.exe
Token: SeDebugPrivilege	2620	powershell.exe
Token: SeDebugPrivilege	5044	powershell.exe
Token: SeDebugPrivilege	2904	powershell.exe
Token: SeDebugPrivilege	1616	powershell.exe
Token: SeIncreaseQuotaPrivilege	5068	wmic.exe
Token: SeSecurityPrivilege	5068	wmic.exe
Token: SeTakeOwnershipPrivilege	5068	wmic.exe
Token: SeLoadDriverPrivilege	5068	wmic.exe
Token: SeSystemProfilePrivilege	5068	wmic.exe
Token: SeSystemtimePrivilege	5068	wmic.exe
Token: SeProfSingleProcessPrivilege	5068	wmic.exe
Token: SeIncBasePriorityPrivilege	5068	wmic.exe
Token: SeCreatePagefilePrivilege	5068	wmic.exe
Token: SeBackupPrivilege	5068	wmic.exe
Token: SeRestorePrivilege	5068	wmic.exe
Token: SeShutdownPrivilege	5068	wmic.exe
Token: SeDebugPrivilege	5068	wmic.exe
Token: SeSystemEnvironmentPrivilege	5068	wmic.exe
Token: SeRemoteShutdownPrivilege	5068	wmic.exe
Token: SeUndockPrivilege	5068	wmic.exe
Token: SeManageVolumePrivilege	5068	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 3048 wrote to memory of 1888	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	83
PID 3048 wrote to memory of 1888	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	83
PID 3048 wrote to memory of 536	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	86
PID 3048 wrote to memory of 536	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	86
PID 3048 wrote to memory of 2620	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	88
PID 3048 wrote to memory of 2620	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	88
PID 3048 wrote to memory of 5044	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	90
PID 3048 wrote to memory of 5044	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	90
PID 3048 wrote to memory of 2904	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	92
PID 3048 wrote to memory of 2904	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	92
PID 3048 wrote to memory of 1616	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	94
PID 3048 wrote to memory of 1616	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	94
PID 3048 wrote to memory of 5068	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	96
PID 3048 wrote to memory of 5068	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	96
PID 3048 wrote to memory of 1156	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	98
PID 3048 wrote to memory of 1156	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	98
PID 3048 wrote to memory of 4196	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	100
PID 3048 wrote to memory of 4196	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	100
PID 3048 wrote to memory of 2108	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	102
PID 3048 wrote to memory of 2108	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	102
PID 3048 wrote to memory of 4552	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	104
PID 3048 wrote to memory of 4552	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	104
PID 3048 wrote to memory of 5080	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	106
PID 3048 wrote to memory of 5080	3048	b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe	106
PID 5080 wrote to memory of 1408	5080	cmd.exe	108
PID 5080 wrote to memory of 1408	5080	cmd.exe	108

Views/modifies file attributes 1 TTPs 1 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
536	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe
"C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3048
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1888
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe"
  2⤵
  - Views/modifies file attributes
  PID:536
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2620
- 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:5044
- 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:2904
- 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:1616
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5068
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1156
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4196
- 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:2108
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4552
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5b55f24a20bf036b8bd5b0475e8050ce8eff7fc97541c3805ba04f7dda6b361.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5080
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1408

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
cadef9abd087803c630df65264a6c81c

SHA1
babbf3636c347c8727c35f3eef2ee643dbcc4bd2

SHA256
cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

SHA512
7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

Filesize
948B

MD5
f4bf3ca8753d6bb9725419fec1ec74b9

SHA1
71fce9d17d1d92873236a9a827c52eb9e4827f3d

SHA256
ca8697e4ada4c3d4aac2899b8aad4052ccd605fccee05ee0a831368bde2f7417

SHA512
a55a107ae8bcf833ea674413c765cd55096146c9634dff41884fcc851c12fe47753308099525c99ae44883facfb668c8b292dd915263f34ebd1190391cb28a54

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

Filesize
1KB

MD5
2a75c2057536d71d287d7cefff04eec3

SHA1
c61131dee25db97244118daaf982c0bd1389b8b4

SHA256
93cf99b87df289b80cc8be11623fbb0b09812f2dcee9986e76cedb188ca942a0

SHA512
1d8877aeade86757fb7d37b54abf27e8d6579a7a51bcbba549bcfd0c66a2b4383ab7f34eb4621c031262df4e5266332e1427f64af268922e24c24ed9ca94f150

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

Filesize
1KB

MD5
e4d5f16dff1c6c4bd78c48253f411da2

SHA1
0fb7366585572b2cf4144d169302ba21d8e71ac3

SHA256
360fe2bf9d46f0e6bb35c1b41ba0d70c5f10a1a9b42e29d9cafea37de5964133

SHA512
27cb84814bf84d0db623e68c06b6391e63d985d5fe77a9d6ca9093329fbe73da490bb9bef67fea667d2d03b1d42ed5b4591f9e72c281c15965d0765c019d4b69

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gd1nwrbq.q3v.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2620-4-0x00007FFDD3500000-0x00007FFDD3FC1000-memory.dmp

Filesize
10.8MB

Download
memory/2620-10-0x0000029333E20000-0x0000029333E42000-memory.dmp

Filesize
136KB

Download
memory/2620-15-0x00007FFDD3500000-0x00007FFDD3FC1000-memory.dmp

Filesize
10.8MB

Download
memory/2620-18-0x00007FFDD3500000-0x00007FFDD3FC1000-memory.dmp

Filesize
10.8MB

Download
memory/2620-3-0x00007FFDD3500000-0x00007FFDD3FC1000-memory.dmp

Filesize
10.8MB

Download
memory/3048-34-0x00000231F23A0000-0x00000231F23F0000-memory.dmp

Filesize
320KB

Download
memory/3048-33-0x00000231F2320000-0x00000231F2396000-memory.dmp

Filesize
472KB

Download
memory/3048-35-0x00000231F2060000-0x00000231F207E000-memory.dmp

Filesize
120KB

Download
memory/3048-1-0x00000231EFB10000-0x00000231EFB50000-memory.dmp

Filesize
256KB

Download
memory/3048-0-0x00007FFDD3503000-0x00007FFDD3505000-memory.dmp

Filesize
8KB

Download
memory/3048-72-0x00000231F0000000-0x00000231F000A000-memory.dmp

Filesize
40KB

Download
memory/3048-73-0x00000231F1900000-0x00000231F1912000-memory.dmp

Filesize
72KB

Download
memory/3048-2-0x00007FFDD3500000-0x00007FFDD3FC1000-memory.dmp

Filesize
10.8MB

Download
memory/3048-93-0x00007FFDD3500000-0x00007FFDD3FC1000-memory.dmp

Filesize
10.8MB

Download