umbral | bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6

Analysis

max time kernel
108s
max time network
109s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17-08-2024 13:35

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General

Target

67735e43b595bc948f427fbc1d4d9400N.exe
Size

229KB
MD5

67735e43b595bc948f427fbc1d4d9400
SHA1

df92217c3101826bf0ae4c8ba53e40026e64dcc3
SHA256

bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6
SHA512

492b3d5372137ca3c3ad287fb84ab40ac6609eff5cf329a039f29b25c39d8c348bf547f01d6e90616e9c11593bf8f294cc73858917ca0ef2a7d03c91d6b89d14
SSDEEP

6144:lloZMLrIkd8g+EtXHkv/iD4vc/yrRiK13wBzOurcVfb8e1mki:noZ0L+EP8vc/yrRiK13wBzOurCG

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4436-1-0x0000022EE76A0000-0x0000022EE76E0000-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
1768	powershell.exe
4116	powershell.exe
3196	powershell.exe
4196	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	67735e43b595bc948f427fbc1d4d9400N.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
32	discord.com
33	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
8	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3524	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4436	67735e43b595bc948f427fbc1d4d9400N.exe
4196	powershell.exe
4196	powershell.exe
1768	powershell.exe
1768	powershell.exe
4116	powershell.exe
4116	powershell.exe
8	powershell.exe
8	powershell.exe
3196	powershell.exe
3196	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4436	67735e43b595bc948f427fbc1d4d9400N.exe
Token: SeIncreaseQuotaPrivilege	3560	wmic.exe
Token: SeSecurityPrivilege	3560	wmic.exe
Token: SeTakeOwnershipPrivilege	3560	wmic.exe
Token: SeLoadDriverPrivilege	3560	wmic.exe
Token: SeSystemProfilePrivilege	3560	wmic.exe
Token: SeSystemtimePrivilege	3560	wmic.exe
Token: SeProfSingleProcessPrivilege	3560	wmic.exe
Token: SeIncBasePriorityPrivilege	3560	wmic.exe
Token: SeCreatePagefilePrivilege	3560	wmic.exe
Token: SeBackupPrivilege	3560	wmic.exe
Token: SeRestorePrivilege	3560	wmic.exe
Token: SeShutdownPrivilege	3560	wmic.exe
Token: SeDebugPrivilege	3560	wmic.exe
Token: SeSystemEnvironmentPrivilege	3560	wmic.exe
Token: SeRemoteShutdownPrivilege	3560	wmic.exe
Token: SeUndockPrivilege	3560	wmic.exe
Token: SeManageVolumePrivilege	3560	wmic.exe
Token: 33	3560	wmic.exe
Token: 34	3560	wmic.exe
Token: 35	3560	wmic.exe
Token: 36	3560	wmic.exe
Token: SeIncreaseQuotaPrivilege	3560	wmic.exe
Token: SeSecurityPrivilege	3560	wmic.exe
Token: SeTakeOwnershipPrivilege	3560	wmic.exe
Token: SeLoadDriverPrivilege	3560	wmic.exe
Token: SeSystemProfilePrivilege	3560	wmic.exe
Token: SeSystemtimePrivilege	3560	wmic.exe
Token: SeProfSingleProcessPrivilege	3560	wmic.exe
Token: SeIncBasePriorityPrivilege	3560	wmic.exe
Token: SeCreatePagefilePrivilege	3560	wmic.exe
Token: SeBackupPrivilege	3560	wmic.exe
Token: SeRestorePrivilege	3560	wmic.exe
Token: SeShutdownPrivilege	3560	wmic.exe
Token: SeDebugPrivilege	3560	wmic.exe
Token: SeSystemEnvironmentPrivilege	3560	wmic.exe
Token: SeRemoteShutdownPrivilege	3560	wmic.exe
Token: SeUndockPrivilege	3560	wmic.exe
Token: SeManageVolumePrivilege	3560	wmic.exe
Token: 33	3560	wmic.exe
Token: 34	3560	wmic.exe
Token: 35	3560	wmic.exe
Token: 36	3560	wmic.exe
Token: SeDebugPrivilege	4196	powershell.exe
Token: SeDebugPrivilege	1768	powershell.exe
Token: SeDebugPrivilege	4116	powershell.exe
Token: SeDebugPrivilege	8	powershell.exe
Token: SeIncreaseQuotaPrivilege	4132	wmic.exe
Token: SeSecurityPrivilege	4132	wmic.exe
Token: SeTakeOwnershipPrivilege	4132	wmic.exe
Token: SeLoadDriverPrivilege	4132	wmic.exe
Token: SeSystemProfilePrivilege	4132	wmic.exe
Token: SeSystemtimePrivilege	4132	wmic.exe
Token: SeProfSingleProcessPrivilege	4132	wmic.exe
Token: SeIncBasePriorityPrivilege	4132	wmic.exe
Token: SeCreatePagefilePrivilege	4132	wmic.exe
Token: SeBackupPrivilege	4132	wmic.exe
Token: SeRestorePrivilege	4132	wmic.exe
Token: SeShutdownPrivilege	4132	wmic.exe
Token: SeDebugPrivilege	4132	wmic.exe
Token: SeSystemEnvironmentPrivilege	4132	wmic.exe
Token: SeRemoteShutdownPrivilege	4132	wmic.exe
Token: SeUndockPrivilege	4132	wmic.exe
Token: SeManageVolumePrivilege	4132	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4436 wrote to memory of 3560	4436	67735e43b595bc948f427fbc1d4d9400N.exe	85
PID 4436 wrote to memory of 3560	4436	67735e43b595bc948f427fbc1d4d9400N.exe	85
PID 4436 wrote to memory of 4196	4436	67735e43b595bc948f427fbc1d4d9400N.exe	90
PID 4436 wrote to memory of 4196	4436	67735e43b595bc948f427fbc1d4d9400N.exe	90
PID 4436 wrote to memory of 1768	4436	67735e43b595bc948f427fbc1d4d9400N.exe	93
PID 4436 wrote to memory of 1768	4436	67735e43b595bc948f427fbc1d4d9400N.exe	93
PID 4436 wrote to memory of 4116	4436	67735e43b595bc948f427fbc1d4d9400N.exe	97
PID 4436 wrote to memory of 4116	4436	67735e43b595bc948f427fbc1d4d9400N.exe	97
PID 4436 wrote to memory of 8	4436	67735e43b595bc948f427fbc1d4d9400N.exe	99
PID 4436 wrote to memory of 8	4436	67735e43b595bc948f427fbc1d4d9400N.exe	99
PID 4436 wrote to memory of 4132	4436	67735e43b595bc948f427fbc1d4d9400N.exe	102
PID 4436 wrote to memory of 4132	4436	67735e43b595bc948f427fbc1d4d9400N.exe	102
PID 4436 wrote to memory of 4480	4436	67735e43b595bc948f427fbc1d4d9400N.exe	104
PID 4436 wrote to memory of 4480	4436	67735e43b595bc948f427fbc1d4d9400N.exe	104
PID 4436 wrote to memory of 3168	4436	67735e43b595bc948f427fbc1d4d9400N.exe	106
PID 4436 wrote to memory of 3168	4436	67735e43b595bc948f427fbc1d4d9400N.exe	106
PID 4436 wrote to memory of 3196	4436	67735e43b595bc948f427fbc1d4d9400N.exe	108
PID 4436 wrote to memory of 3196	4436	67735e43b595bc948f427fbc1d4d9400N.exe	108
PID 4436 wrote to memory of 3524	4436	67735e43b595bc948f427fbc1d4d9400N.exe	110
PID 4436 wrote to memory of 3524	4436	67735e43b595bc948f427fbc1d4d9400N.exe	110

C:\Users\Admin\AppData\Local\Temp\67735e43b595bc948f427fbc1d4d9400N.exe
"C:\Users\Admin\AppData\Local\Temp\67735e43b595bc948f427fbc1d4d9400N.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3560
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\67735e43b595bc948f427fbc1d4d9400N.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4196
- 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:1768
- 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:4116
- 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:8
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4132
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4480
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3168
- 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:3196
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3524

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

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

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

Filesize
948B

MD5
966914e2e771de7a4a57a95b6ecfa8a9

SHA1
7a32282fd51dd032967ed4d9a40cc57e265aeff2

SHA256
98d3c70d7004fa807897317bd6cd3e977b9b6c72d4d2565aca0f9f8b1c315cba

SHA512
dc39c7124a9c7c8d4c7e8e16290c46360b8d9a8f4e43edaacbbeb09bdcf20159a53db54d2b322372001b6a3de52b2f88e9088b5fdbc7638816ae0d122bb015f5

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
061e9b5da7f9fd404684666a318e199b

SHA1
359fbcd8bc8cb3927430cc14712cd342abcb1a54

SHA256
e3192bd21a73f05c04489dfe93e7f09531f6929122d2f770652cd9f6b7af572a

SHA512
26554f601be1d4638807ee7d6f86ee8602921ac461eb0cff812238760c1108b2ca0d76be763374328efe71b826e056aa27e1aaa4bcfee16e60d619498d9a8ea4

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_adwwalql.abj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/4196-4-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/4196-5-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/4196-11-0x000001F95BF60000-0x000001F95BF82000-memory.dmp

Filesize
136KB

Download
memory/4196-18-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/4196-3-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/4436-34-0x0000022EE9E70000-0x0000022EE9EC0000-memory.dmp

Filesize
320KB

Download
memory/4436-33-0x0000022EE9DF0000-0x0000022EE9E66000-memory.dmp

Filesize
472KB

Download
memory/4436-35-0x0000022EE9D70000-0x0000022EE9D8E000-memory.dmp

Filesize
120KB

Download
memory/4436-1-0x0000022EE76A0000-0x0000022EE76E0000-memory.dmp

Filesize
256KB

Download
memory/4436-0-0x00007FFAF6973000-0x00007FFAF6975000-memory.dmp

Filesize
8KB

Download
memory/4436-71-0x0000022EE9D90000-0x0000022EE9D9A000-memory.dmp

Filesize
40KB

Download
memory/4436-72-0x0000022EE9DC0000-0x0000022EE9DD2000-memory.dmp

Filesize
72KB

Download
memory/4436-2-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download
memory/4436-90-0x00007FFAF6970000-0x00007FFAF7431000-memory.dmp

Filesize
10.8MB

Download