umbral | 4adaffe46ccae1425c54b81f87fcb56b7f66760b5d5f0ae3328e72c934bbb3c8

Analysis

max time kernel
95s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
05/09/2024, 15:27

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General

Target

Nitro Tools.exe
Size

231KB
MD5

eb9bfe2cafae0e84d30f9e214ec4a6aa
SHA1

fabd92cb405e06b720a88d0077b124fb97577208
SHA256

e88819618a14114c00385b9729bd83567ab21a5547baa8923477bd2c54434369
SHA512

8358eddbb14c88a5ff8859a1c0339f7d0380c8a91510b5daa0e6a3a6dcd15b3967496caef46d10e5f1ba6e7d60c65077022815fa16fc7f0fc542b17007e2a0fa
SSDEEP

6144:RloZM3fsXtioRkts/cnnK6cMl1l0W6YXzQgp8aLLyJcS8e1mKLi:joZ1tlRk83Ml1l0W6YXzQgp8aLLy5rG

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/1212-1-0x0000025966EC0000-0x0000025966F00000-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

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4168	powershell.exe
1980	powershell.exe
4776	powershell.exe
4592	powershell.exe

Drops file in Drivers directory 1 IoCs

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

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
6	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
336	cmd.exe
1208	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4764	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1208	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1212	Nitro Tools.exe
4592	powershell.exe
4592	powershell.exe
4776	powershell.exe
4776	powershell.exe
4168	powershell.exe
4168	powershell.exe
2560	powershell.exe
2560	powershell.exe
1980	powershell.exe
1980	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1212	Nitro Tools.exe
Token: SeIncreaseQuotaPrivilege	3664	wmic.exe
Token: SeSecurityPrivilege	3664	wmic.exe
Token: SeTakeOwnershipPrivilege	3664	wmic.exe
Token: SeLoadDriverPrivilege	3664	wmic.exe
Token: SeSystemProfilePrivilege	3664	wmic.exe
Token: SeSystemtimePrivilege	3664	wmic.exe
Token: SeProfSingleProcessPrivilege	3664	wmic.exe
Token: SeIncBasePriorityPrivilege	3664	wmic.exe
Token: SeCreatePagefilePrivilege	3664	wmic.exe
Token: SeBackupPrivilege	3664	wmic.exe
Token: SeRestorePrivilege	3664	wmic.exe
Token: SeShutdownPrivilege	3664	wmic.exe
Token: SeDebugPrivilege	3664	wmic.exe
Token: SeSystemEnvironmentPrivilege	3664	wmic.exe
Token: SeRemoteShutdownPrivilege	3664	wmic.exe
Token: SeUndockPrivilege	3664	wmic.exe
Token: SeManageVolumePrivilege	3664	wmic.exe
Token: 33	3664	wmic.exe
Token: 34	3664	wmic.exe
Token: 35	3664	wmic.exe
Token: 36	3664	wmic.exe
Token: SeIncreaseQuotaPrivilege	3664	wmic.exe
Token: SeSecurityPrivilege	3664	wmic.exe
Token: SeTakeOwnershipPrivilege	3664	wmic.exe
Token: SeLoadDriverPrivilege	3664	wmic.exe
Token: SeSystemProfilePrivilege	3664	wmic.exe
Token: SeSystemtimePrivilege	3664	wmic.exe
Token: SeProfSingleProcessPrivilege	3664	wmic.exe
Token: SeIncBasePriorityPrivilege	3664	wmic.exe
Token: SeCreatePagefilePrivilege	3664	wmic.exe
Token: SeBackupPrivilege	3664	wmic.exe
Token: SeRestorePrivilege	3664	wmic.exe
Token: SeShutdownPrivilege	3664	wmic.exe
Token: SeDebugPrivilege	3664	wmic.exe
Token: SeSystemEnvironmentPrivilege	3664	wmic.exe
Token: SeRemoteShutdownPrivilege	3664	wmic.exe
Token: SeUndockPrivilege	3664	wmic.exe
Token: SeManageVolumePrivilege	3664	wmic.exe
Token: 33	3664	wmic.exe
Token: 34	3664	wmic.exe
Token: 35	3664	wmic.exe
Token: 36	3664	wmic.exe
Token: SeDebugPrivilege	4592	powershell.exe
Token: SeDebugPrivilege	4776	powershell.exe
Token: SeDebugPrivilege	4168	powershell.exe
Token: SeDebugPrivilege	2560	powershell.exe
Token: SeIncreaseQuotaPrivilege	2424	wmic.exe
Token: SeSecurityPrivilege	2424	wmic.exe
Token: SeTakeOwnershipPrivilege	2424	wmic.exe
Token: SeLoadDriverPrivilege	2424	wmic.exe
Token: SeSystemProfilePrivilege	2424	wmic.exe
Token: SeSystemtimePrivilege	2424	wmic.exe
Token: SeProfSingleProcessPrivilege	2424	wmic.exe
Token: SeIncBasePriorityPrivilege	2424	wmic.exe
Token: SeCreatePagefilePrivilege	2424	wmic.exe
Token: SeBackupPrivilege	2424	wmic.exe
Token: SeRestorePrivilege	2424	wmic.exe
Token: SeShutdownPrivilege	2424	wmic.exe
Token: SeDebugPrivilege	2424	wmic.exe
Token: SeSystemEnvironmentPrivilege	2424	wmic.exe
Token: SeRemoteShutdownPrivilege	2424	wmic.exe
Token: SeUndockPrivilege	2424	wmic.exe
Token: SeManageVolumePrivilege	2424	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1212 wrote to memory of 3664	1212	Nitro Tools.exe	83
PID 1212 wrote to memory of 3664	1212	Nitro Tools.exe	83
PID 1212 wrote to memory of 2120	1212	Nitro Tools.exe	89
PID 1212 wrote to memory of 2120	1212	Nitro Tools.exe	89
PID 1212 wrote to memory of 4592	1212	Nitro Tools.exe	91
PID 1212 wrote to memory of 4592	1212	Nitro Tools.exe	91
PID 1212 wrote to memory of 4776	1212	Nitro Tools.exe	94
PID 1212 wrote to memory of 4776	1212	Nitro Tools.exe	94
PID 1212 wrote to memory of 4168	1212	Nitro Tools.exe	96
PID 1212 wrote to memory of 4168	1212	Nitro Tools.exe	96
PID 1212 wrote to memory of 2560	1212	Nitro Tools.exe	98
PID 1212 wrote to memory of 2560	1212	Nitro Tools.exe	98
PID 1212 wrote to memory of 2424	1212	Nitro Tools.exe	102
PID 1212 wrote to memory of 2424	1212	Nitro Tools.exe	102
PID 1212 wrote to memory of 220	1212	Nitro Tools.exe	104
PID 1212 wrote to memory of 220	1212	Nitro Tools.exe	104
PID 1212 wrote to memory of 1216	1212	Nitro Tools.exe	106
PID 1212 wrote to memory of 1216	1212	Nitro Tools.exe	106
PID 1212 wrote to memory of 1980	1212	Nitro Tools.exe	108
PID 1212 wrote to memory of 1980	1212	Nitro Tools.exe	108
PID 1212 wrote to memory of 4764	1212	Nitro Tools.exe	110
PID 1212 wrote to memory of 4764	1212	Nitro Tools.exe	110
PID 1212 wrote to memory of 336	1212	Nitro Tools.exe	114
PID 1212 wrote to memory of 336	1212	Nitro Tools.exe	114
PID 336 wrote to memory of 1208	336	cmd.exe	116
PID 336 wrote to memory of 1208	336	cmd.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
2120	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Nitro Tools.exe
"C:\Users\Admin\AppData\Local\Temp\Nitro Tools.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1212
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3664
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Nitro Tools.exe"
  2⤵
  - Views/modifies file attributes
  PID:2120
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Nitro Tools.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4592
- 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:4776
- 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:4168
- 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:2560
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2424
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:220
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1216
- 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:1980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4764
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Nitro Tools.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:336
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1208

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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
74a6b79d36b4aae8b027a218bc6e1af7

SHA1
0350e46c1df6934903c4820a00b0bc4721779e5f

SHA256
60c64f6803d7ad1408d0a8628100470859b16ef332d5f1bd8bb2debe51251d04

SHA512
60e71435a9a23f4c144d641844f4182ddc9aa4ccd3e99232149a187112dce96458aab9587e9fea46f5dc5a52f5ca758969a04657a2b5b10241d3e4554f7c85e0

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

Filesize
1KB

MD5
d3235ed022a42ec4338123ab87144afa

SHA1
5058608bc0deb720a585a2304a8f7cf63a50a315

SHA256
10663f5a1cb0afe5578f61ebaae2aafb363544e47b48521f9c23be9e6e431b27

SHA512
236761b7c68feca8bd62cba90cff0b25fac5613837aaa5d29ae823ace8b06a2057553cf7e72b11ccc59b6c289e471ca1bbac1a880aef5e2868875371a17c1abf

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

Filesize
1KB

MD5
88db0a141f2cd066a7c4df2b3c8f8010

SHA1
94fa00eb79992a0ded28012645a7caf8e04debe1

SHA256
0d8418bfcb5ad8ee710af1bfbed2e2a095e50d56f487372775e6cef420f1c85a

SHA512
0cc6090bf52227b8241e9f38849257de7e5c2ad2a9a9ead41f115b7492caa97c64bf2cd02640d48dc5d8593c4ae462497fe1aba87f8454a096cd174932a699bd

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ltixygbp.nvd.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1212-71-0x0000025968CA0000-0x0000025968CAA000-memory.dmp

Filesize
40KB

Download
memory/1212-35-0x0000025968C70000-0x0000025968C8E000-memory.dmp

Filesize
120KB

Download
memory/1212-91-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/1212-90-0x0000025969870000-0x0000025969A19000-memory.dmp

Filesize
1.7MB

Download
memory/1212-2-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/1212-33-0x0000025969660000-0x00000259696D6000-memory.dmp

Filesize
472KB

Download
memory/1212-34-0x00000259695E0000-0x0000025969630000-memory.dmp

Filesize
320KB

Download
memory/1212-72-0x0000025969630000-0x0000025969642000-memory.dmp

Filesize
72KB

Download
memory/1212-1-0x0000025966EC0000-0x0000025966F00000-memory.dmp

Filesize
256KB

Download
memory/1212-0-0x00007FFACED13000-0x00007FFACED15000-memory.dmp

Filesize
8KB

Download
memory/4592-9-0x000001B033010000-0x000001B033032000-memory.dmp

Filesize
136KB

Download
memory/4592-15-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/4592-14-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/4592-3-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download
memory/4592-18-0x00007FFACED10000-0x00007FFACF7D1000-memory.dmp

Filesize
10.8MB

Download