umbral | f29f169e410ccc847f78e8df47006a45025ba10f0d517629f80ad73995d614fd

Analysis

max time kernel
130s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
20-08-2024 20:38

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General

Target

fkgDa.scr.exe
Size

227KB
MD5

57725f9d6fe867414481c9174b761df1
SHA1

498f57a097747aa80a83a2927a74d96c007028c6
SHA256

f29f169e410ccc847f78e8df47006a45025ba10f0d517629f80ad73995d614fd
SHA512

28de892b39cfb8e534c8bec5c2a8f277adb006499930fc6cf00251b5f157033d856dcb41dbc80375a61dc7ffe9eb109e1e00cbc42972b2202f8348daac7b6586
SSDEEP

6144:+loZM9rIkd8g+EtXHkv/iD4UcHZLxCqVUQhTuOLdG2Hb8e1mB1i:ooZOL+EP8UcHZLxCqVUQhTuOLd9Ec

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3760-1-0x000001631BF40000-0x000001631BF80000-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
4560	powershell.exe
5032	powershell.exe
1672	powershell.exe
4440	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	fkgDa.scr.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
23	discord.com
24	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
15	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
5068	cmd.exe
2644	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4628	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2644	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4560	powershell.exe
4560	powershell.exe
5032	powershell.exe
5032	powershell.exe
1672	powershell.exe
1672	powershell.exe
1396	powershell.exe
1396	powershell.exe
4440	powershell.exe
4440	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3760	fkgDa.scr.exe
Token: SeDebugPrivilege	4560	powershell.exe
Token: SeDebugPrivilege	5032	powershell.exe
Token: SeDebugPrivilege	1672	powershell.exe
Token: SeDebugPrivilege	1396	powershell.exe
Token: SeIncreaseQuotaPrivilege	3504	wmic.exe
Token: SeSecurityPrivilege	3504	wmic.exe
Token: SeTakeOwnershipPrivilege	3504	wmic.exe
Token: SeLoadDriverPrivilege	3504	wmic.exe
Token: SeSystemProfilePrivilege	3504	wmic.exe
Token: SeSystemtimePrivilege	3504	wmic.exe
Token: SeProfSingleProcessPrivilege	3504	wmic.exe
Token: SeIncBasePriorityPrivilege	3504	wmic.exe
Token: SeCreatePagefilePrivilege	3504	wmic.exe
Token: SeBackupPrivilege	3504	wmic.exe
Token: SeRestorePrivilege	3504	wmic.exe
Token: SeShutdownPrivilege	3504	wmic.exe
Token: SeDebugPrivilege	3504	wmic.exe
Token: SeSystemEnvironmentPrivilege	3504	wmic.exe
Token: SeRemoteShutdownPrivilege	3504	wmic.exe
Token: SeUndockPrivilege	3504	wmic.exe
Token: SeManageVolumePrivilege	3504	wmic.exe
Token: 33	3504	wmic.exe
Token: 34	3504	wmic.exe
Token: 35	3504	wmic.exe
Token: 36	3504	wmic.exe
Token: SeIncreaseQuotaPrivilege	3504	wmic.exe
Token: SeSecurityPrivilege	3504	wmic.exe
Token: SeTakeOwnershipPrivilege	3504	wmic.exe
Token: SeLoadDriverPrivilege	3504	wmic.exe
Token: SeSystemProfilePrivilege	3504	wmic.exe
Token: SeSystemtimePrivilege	3504	wmic.exe
Token: SeProfSingleProcessPrivilege	3504	wmic.exe
Token: SeIncBasePriorityPrivilege	3504	wmic.exe
Token: SeCreatePagefilePrivilege	3504	wmic.exe
Token: SeBackupPrivilege	3504	wmic.exe
Token: SeRestorePrivilege	3504	wmic.exe
Token: SeShutdownPrivilege	3504	wmic.exe
Token: SeDebugPrivilege	3504	wmic.exe
Token: SeSystemEnvironmentPrivilege	3504	wmic.exe
Token: SeRemoteShutdownPrivilege	3504	wmic.exe
Token: SeUndockPrivilege	3504	wmic.exe
Token: SeManageVolumePrivilege	3504	wmic.exe
Token: 33	3504	wmic.exe
Token: 34	3504	wmic.exe
Token: 35	3504	wmic.exe
Token: 36	3504	wmic.exe
Token: SeIncreaseQuotaPrivilege	4508	wmic.exe
Token: SeSecurityPrivilege	4508	wmic.exe
Token: SeTakeOwnershipPrivilege	4508	wmic.exe
Token: SeLoadDriverPrivilege	4508	wmic.exe
Token: SeSystemProfilePrivilege	4508	wmic.exe
Token: SeSystemtimePrivilege	4508	wmic.exe
Token: SeProfSingleProcessPrivilege	4508	wmic.exe
Token: SeIncBasePriorityPrivilege	4508	wmic.exe
Token: SeCreatePagefilePrivilege	4508	wmic.exe
Token: SeBackupPrivilege	4508	wmic.exe
Token: SeRestorePrivilege	4508	wmic.exe
Token: SeShutdownPrivilege	4508	wmic.exe
Token: SeDebugPrivilege	4508	wmic.exe
Token: SeSystemEnvironmentPrivilege	4508	wmic.exe
Token: SeRemoteShutdownPrivilege	4508	wmic.exe
Token: SeUndockPrivilege	4508	wmic.exe
Token: SeManageVolumePrivilege	4508	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3760 wrote to memory of 4248	3760	fkgDa.scr.exe	86
PID 3760 wrote to memory of 4248	3760	fkgDa.scr.exe	86
PID 3760 wrote to memory of 4560	3760	fkgDa.scr.exe	88
PID 3760 wrote to memory of 4560	3760	fkgDa.scr.exe	88
PID 3760 wrote to memory of 5032	3760	fkgDa.scr.exe	92
PID 3760 wrote to memory of 5032	3760	fkgDa.scr.exe	92
PID 3760 wrote to memory of 1672	3760	fkgDa.scr.exe	95
PID 3760 wrote to memory of 1672	3760	fkgDa.scr.exe	95
PID 3760 wrote to memory of 1396	3760	fkgDa.scr.exe	97
PID 3760 wrote to memory of 1396	3760	fkgDa.scr.exe	97
PID 3760 wrote to memory of 3504	3760	fkgDa.scr.exe	99
PID 3760 wrote to memory of 3504	3760	fkgDa.scr.exe	99
PID 3760 wrote to memory of 4508	3760	fkgDa.scr.exe	103
PID 3760 wrote to memory of 4508	3760	fkgDa.scr.exe	103
PID 3760 wrote to memory of 1696	3760	fkgDa.scr.exe	106
PID 3760 wrote to memory of 1696	3760	fkgDa.scr.exe	106
PID 3760 wrote to memory of 4440	3760	fkgDa.scr.exe	108
PID 3760 wrote to memory of 4440	3760	fkgDa.scr.exe	108
PID 3760 wrote to memory of 4628	3760	fkgDa.scr.exe	110
PID 3760 wrote to memory of 4628	3760	fkgDa.scr.exe	110
PID 3760 wrote to memory of 5068	3760	fkgDa.scr.exe	113
PID 3760 wrote to memory of 5068	3760	fkgDa.scr.exe	113
PID 5068 wrote to memory of 2644	5068	cmd.exe	115
PID 5068 wrote to memory of 2644	5068	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4248	attrib.exe

C:\Users\Admin\AppData\Local\Temp\fkgDa.scr.exe
"C:\Users\Admin\AppData\Local\Temp\fkgDa.scr.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3760
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\fkgDa.scr.exe"
  2⤵
  - Views/modifies file attributes
  PID:4248
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\fkgDa.scr.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4560
- 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:5032
- 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:1672
- 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:1396
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3504
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4508
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1696
- 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:4440
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4628
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\fkgDa.scr.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:5068
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2644

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
6317adf4fbc43ea2fd68861fafd57155

SHA1
6b87c718893c83c6eed2767e8d9cbc6443e31913

SHA256
c1ead17eef37b4b461cedc276504a441489e819c7f943037f2001966aeec90af

SHA512
17229aae8622e4bfc3caaac55684f7d4ccd3162af5919c851b1d8ac4060b6bb7b75044ecee116523d05acb55197dcb60780958f629450edef386f1e6f65f49f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ayoorosx.b5a.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3760-71-0x0000016336610000-0x000001633661A000-memory.dmp

Filesize
40KB

Download
memory/3760-35-0x0000016336730000-0x000001633674E000-memory.dmp

Filesize
120KB

Download
memory/3760-90-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

Filesize
10.8MB

Download
memory/3760-72-0x0000016336710000-0x0000016336722000-memory.dmp

Filesize
72KB

Download
memory/3760-2-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

Filesize
10.8MB

Download
memory/3760-33-0x0000016336670000-0x00000163366E6000-memory.dmp

Filesize
472KB

Download
memory/3760-34-0x0000016336620000-0x0000016336670000-memory.dmp

Filesize
320KB

Download
memory/3760-0-0x00007FF8BD7B3000-0x00007FF8BD7B5000-memory.dmp

Filesize
8KB

Download
memory/3760-1-0x000001631BF40000-0x000001631BF80000-memory.dmp

Filesize
256KB

Download
memory/4560-15-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

Filesize
10.8MB

Download
memory/4560-14-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

Filesize
10.8MB

Download
memory/4560-3-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

Filesize
10.8MB

Download
memory/4560-10-0x0000016158060000-0x0000016158082000-memory.dmp

Filesize
136KB

Download
memory/4560-18-0x00007FF8BD7B0000-0x00007FF8BE271000-memory.dmp

Filesize
10.8MB

Download