umbral | b4a7f642b99b55cd0a4d0f853404c74e3a56a7d8ebdd2cc2548f3c3aafe201fd

Analysis

max time kernel
143s
max time network
127s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
09-10-2024 15:32

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General

Target

фambral.exe
Size

227KB
MD5

6e13e79e84c2222a4f601af974a38f45
SHA1

1653fa8feb0e8c2b9230c0c9fe0da9dc33d1b1fc
SHA256

b4a7f642b99b55cd0a4d0f853404c74e3a56a7d8ebdd2cc2548f3c3aafe201fd
SHA512

5046475acd8bff206583c99c260b5d182ebe794d6656a3e146583d6cc4ac64f47ec0ef7d6520111c0e58ff8428b155afb19bfc5625ddc075276324f1424037a4
SSDEEP

6144:+loZMUrIkd8g+EtXHkv/iD4/wbM4+ZRSh3q459cr6Gb8e1mSi:ooZrL+EP8/wbM4+ZRSh3q459cpA

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2780-1-0x0000023DB0C30000-0x0000023DB0C70000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer 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
2036	powershell.exe
1704	powershell.exe
1500	powershell.exe
1336	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	фambral.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
20	discord.com
21	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
18	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
4388	cmd.exe
1496	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4556	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1496	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2036	powershell.exe
2036	powershell.exe
1500	powershell.exe
1500	powershell.exe
1336	powershell.exe
1336	powershell.exe
3360	powershell.exe
3360	powershell.exe
1704	powershell.exe
1704	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2780	фambral.exe
Token: SeDebugPrivilege	2036	powershell.exe
Token: SeDebugPrivilege	1500	powershell.exe
Token: SeDebugPrivilege	1336	powershell.exe
Token: SeDebugPrivilege	3360	powershell.exe
Token: SeIncreaseQuotaPrivilege	2616	wmic.exe
Token: SeSecurityPrivilege	2616	wmic.exe
Token: SeTakeOwnershipPrivilege	2616	wmic.exe
Token: SeLoadDriverPrivilege	2616	wmic.exe
Token: SeSystemProfilePrivilege	2616	wmic.exe
Token: SeSystemtimePrivilege	2616	wmic.exe
Token: SeProfSingleProcessPrivilege	2616	wmic.exe
Token: SeIncBasePriorityPrivilege	2616	wmic.exe
Token: SeCreatePagefilePrivilege	2616	wmic.exe
Token: SeBackupPrivilege	2616	wmic.exe
Token: SeRestorePrivilege	2616	wmic.exe
Token: SeShutdownPrivilege	2616	wmic.exe
Token: SeDebugPrivilege	2616	wmic.exe
Token: SeSystemEnvironmentPrivilege	2616	wmic.exe
Token: SeRemoteShutdownPrivilege	2616	wmic.exe
Token: SeUndockPrivilege	2616	wmic.exe
Token: SeManageVolumePrivilege	2616	wmic.exe
Token: 33	2616	wmic.exe
Token: 34	2616	wmic.exe
Token: 35	2616	wmic.exe
Token: 36	2616	wmic.exe
Token: SeIncreaseQuotaPrivilege	2616	wmic.exe
Token: SeSecurityPrivilege	2616	wmic.exe
Token: SeTakeOwnershipPrivilege	2616	wmic.exe
Token: SeLoadDriverPrivilege	2616	wmic.exe
Token: SeSystemProfilePrivilege	2616	wmic.exe
Token: SeSystemtimePrivilege	2616	wmic.exe
Token: SeProfSingleProcessPrivilege	2616	wmic.exe
Token: SeIncBasePriorityPrivilege	2616	wmic.exe
Token: SeCreatePagefilePrivilege	2616	wmic.exe
Token: SeBackupPrivilege	2616	wmic.exe
Token: SeRestorePrivilege	2616	wmic.exe
Token: SeShutdownPrivilege	2616	wmic.exe
Token: SeDebugPrivilege	2616	wmic.exe
Token: SeSystemEnvironmentPrivilege	2616	wmic.exe
Token: SeRemoteShutdownPrivilege	2616	wmic.exe
Token: SeUndockPrivilege	2616	wmic.exe
Token: SeManageVolumePrivilege	2616	wmic.exe
Token: 33	2616	wmic.exe
Token: 34	2616	wmic.exe
Token: 35	2616	wmic.exe
Token: 36	2616	wmic.exe
Token: SeIncreaseQuotaPrivilege	4212	wmic.exe
Token: SeSecurityPrivilege	4212	wmic.exe
Token: SeTakeOwnershipPrivilege	4212	wmic.exe
Token: SeLoadDriverPrivilege	4212	wmic.exe
Token: SeSystemProfilePrivilege	4212	wmic.exe
Token: SeSystemtimePrivilege	4212	wmic.exe
Token: SeProfSingleProcessPrivilege	4212	wmic.exe
Token: SeIncBasePriorityPrivilege	4212	wmic.exe
Token: SeCreatePagefilePrivilege	4212	wmic.exe
Token: SeBackupPrivilege	4212	wmic.exe
Token: SeRestorePrivilege	4212	wmic.exe
Token: SeShutdownPrivilege	4212	wmic.exe
Token: SeDebugPrivilege	4212	wmic.exe
Token: SeSystemEnvironmentPrivilege	4212	wmic.exe
Token: SeRemoteShutdownPrivilege	4212	wmic.exe
Token: SeUndockPrivilege	4212	wmic.exe
Token: SeManageVolumePrivilege	4212	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 2000	2780	фambral.exe	81
PID 2780 wrote to memory of 2000	2780	фambral.exe	81
PID 2780 wrote to memory of 2036	2780	фambral.exe	83
PID 2780 wrote to memory of 2036	2780	фambral.exe	83
PID 2780 wrote to memory of 1500	2780	фambral.exe	85
PID 2780 wrote to memory of 1500	2780	фambral.exe	85
PID 2780 wrote to memory of 1336	2780	фambral.exe	87
PID 2780 wrote to memory of 1336	2780	фambral.exe	87
PID 2780 wrote to memory of 3360	2780	фambral.exe	89
PID 2780 wrote to memory of 3360	2780	фambral.exe	89
PID 2780 wrote to memory of 2616	2780	фambral.exe	91
PID 2780 wrote to memory of 2616	2780	фambral.exe	91
PID 2780 wrote to memory of 4212	2780	фambral.exe	94
PID 2780 wrote to memory of 4212	2780	фambral.exe	94
PID 2780 wrote to memory of 2244	2780	фambral.exe	96
PID 2780 wrote to memory of 2244	2780	фambral.exe	96
PID 2780 wrote to memory of 1704	2780	фambral.exe	98
PID 2780 wrote to memory of 1704	2780	фambral.exe	98
PID 2780 wrote to memory of 4556	2780	фambral.exe	100
PID 2780 wrote to memory of 4556	2780	фambral.exe	100
PID 2780 wrote to memory of 4388	2780	фambral.exe	102
PID 2780 wrote to memory of 4388	2780	фambral.exe	102
PID 4388 wrote to memory of 1496	4388	cmd.exe	104
PID 4388 wrote to memory of 1496	4388	cmd.exe	104

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2000	attrib.exe

C:\Users\Admin\AppData\Local\Temp\фambral.exe
"C:\Users\Admin\AppData\Local\Temp\фambral.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2780
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\фambral.exe"
  2⤵
  - Views/modifies file attributes
  PID:2000
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\фambral.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2036
- 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:1500
- 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:1336
- 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:3360
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2616
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2244
- 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:1704
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4556
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\фambral.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:4388
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1496

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
627073ee3ca9676911bee35548eff2b8

SHA1
4c4b68c65e2cab9864b51167d710aa29ebdcff2e

SHA256
85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

SHA512
3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

Filesize
944B

MD5
2e8eb51096d6f6781456fef7df731d97

SHA1
ec2aaf851a618fb43c3d040a13a71997c25bda43

SHA256
96bfd9dd5883329927fe8c08b8956355a1a6ceb30ceeb5d4252b346df32bc864

SHA512
0a73dc9a49f92d9dd556c2ca2e36761890b3538f355ee1f013e7cf648d8c4d065f28046cd4a167db3dea304d1fbcbcea68d11ce6e12a3f20f8b6c018a60422d2

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

Filesize
948B

MD5
fa21dd50b4e64421076f843031c8ccf7

SHA1
2c56e94f130c0d8d77116e939ffee4e37cf982bd

SHA256
e4f21aca1e12aafa8de7af24b79a75526e902c7d4b3fea5bdb6e723976997be3

SHA512
b8de2bfeb7af06c587dd1f424d410cf83471f31a55a3ea4c4481ce07ffd9bf66ddc1f7775ecd6ac65ac33baaec90ba5a208a9aefc84f31125a50dfb919982687

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
212505af150f5db2e48842447a46b159

SHA1
28123a84652f071727f4bd8e072d9230b1567172

SHA256
c097887b2d4029095365f6d3b9bf8accd7121ee25369ae00980e8ddbd4ca50bb

SHA512
9105e461968b0d534c7d847f4d395eabce605f74998a1066802730d4284fb3fe838586f39a6e23d66340a4ae817875c0219f2a1e054d823bfd2fc2508048bb4b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_igwokkoy.tuf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2036-12-0x000001537A8C0000-0x000001537A8E2000-memory.dmp

Filesize
136KB

Download
memory/2036-14-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2036-15-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2036-16-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2036-19-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2036-3-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2036-13-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2780-34-0x0000023DCB380000-0x0000023DCB39E000-memory.dmp

Filesize
120KB

Download
memory/2780-33-0x0000023DCB480000-0x0000023DCB4D0000-memory.dmp

Filesize
320KB

Download
memory/2780-32-0x0000023DCB400000-0x0000023DCB476000-memory.dmp

Filesize
472KB

Download
memory/2780-0-0x00007FFE47C33000-0x00007FFE47C35000-memory.dmp

Filesize
8KB

Download
memory/2780-2-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2780-69-0x0000023DCB3B0000-0x0000023DCB3BA000-memory.dmp

Filesize
40KB

Download
memory/2780-70-0x0000023DCB3E0000-0x0000023DCB3F2000-memory.dmp

Filesize
72KB

Download
memory/2780-74-0x00007FFE47C33000-0x00007FFE47C35000-memory.dmp

Filesize
8KB

Download
memory/2780-75-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download
memory/2780-1-0x0000023DB0C30000-0x0000023DB0C70000-memory.dmp

Filesize
256KB

Download
memory/2780-91-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

Filesize
10.8MB

Download