xpertrat | 69186bb77f81edb9bcc66a0382fe00944e6dc67982d61d37d7f0d2e32e92d727

Analysis

max time kernel
141s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
14/02/2022, 10:59

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General

Target
Presupuesto proyecto P3787-SHN Barcelona.pdf.exe
Size 389KB
Sample220214-m3efxshbb8
SHA256 69186bb77f81edb9bcc66a0382fe00944e6dc67982d61d37d7f0d2e32e92d727
MD5 889ae401a3acc4f824065ac0f47143b5
SHA1 6f81823927158edf53d6b08d2d38dab356cba70e
SHA512 128988c0047380512caa0d6d9c68f7571f06388d6862549675caeb21ddbe04e0b648e78f0ea0e90d7c516b33c91d2abe851503dc55cb842b24da7196ab7b1915
MD5 SHA1 SHA512

Score

10^/10

xpertrat collection evasion persistence rat trojan

Malware Config

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess 2 IoCs

description	pid	Process	procid_target
PID 3344 created 4624	3344	WerFault.exe	84
PID 2132 created 4652	2132	WerFault.exe	97

UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112
Windows security bypass 2 TTPs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112
XpertRAT
XpertRAT is a remote access trojan with various capabilities.
rat xpertrat

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6 = "C:\\Users\\Admin\\AppData\\Roaming\\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6.exe"	iexplore.exe

Executes dropped EXE 2 IoCs

pid	Process
2520	onhaomfun.exe
1508	onhaomfun.exe

Windows security modification 2 TTPs 1 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0"	onhaomfun.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	iexplore.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1346565761-3498240568-4147300184-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6 = "C:\\Users\\Admin\\AppData\\Roaming\\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6.exe"	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6 = "C:\\Users\\Admin\\AppData\\Roaming\\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6.exe"	iexplore.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	onhaomfun.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4280	4624	WerFault.exe	84
3136	4652	WerFault.exe	97

Suspicious use of SetThreadContext 9 IoCs

description	pid	Process	procid_target
PID 2520 set thread context of 1508	2520	onhaomfun.exe	83
PID 1508 set thread context of 4624	1508	onhaomfun.exe	84
PID 1508 set thread context of 4300	1508	onhaomfun.exe	91
PID 4300 set thread context of 3120	4300	iexplore.exe	93
PID 4300 set thread context of 1856	4300	iexplore.exe	94
PID 4300 set thread context of 2904	4300	iexplore.exe	95
PID 4300 set thread context of 2572	4300	iexplore.exe	96
PID 4300 set thread context of 4652	4300	iexplore.exe	97
PID 4300 set thread context of 4900	4300	iexplore.exe	100

Drops file in Windows directory 8 IoCs

description	ioc	Process
File opened for modification	C:\Windows\WinSxS\pending.xml	TiWorker.exe
File opened for modification	C:\Windows\WindowsUpdate.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.chk	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\Logs\edb.log	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.edb	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\DataStore\DataStore.jfm	svchost.exe
File opened for modification	C:\Windows\SoftwareDistribution\ReportingEvents.log	svchost.exe
File opened for modification	C:\Windows\Logs\CBS\CBS.log	TiWorker.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1508	onhaomfun.exe
1508	onhaomfun.exe
1508	onhaomfun.exe
1508	onhaomfun.exe
3120	iexplore.exe
3120	iexplore.exe
2904	iexplore.exe
2904	iexplore.exe
1508	onhaomfun.exe
1508	onhaomfun.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeShutdownPrivilege	4936	svchost.exe
Token: SeCreatePagefilePrivilege	4936	svchost.exe
Token: SeShutdownPrivilege	4936	svchost.exe
Token: SeCreatePagefilePrivilege	4936	svchost.exe
Token: SeDebugPrivilege	4300	iexplore.exe
Token: SeShutdownPrivilege	4936	svchost.exe
Token: SeCreatePagefilePrivilege	4936	svchost.exe
Token: SeDebugPrivilege	3120	iexplore.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe
Token: SeSecurityPrivilege	1348	TiWorker.exe
Token: SeBackupPrivilege	1348	TiWorker.exe
Token: SeRestorePrivilege	1348	TiWorker.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1508	onhaomfun.exe
4300	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 3536 wrote to memory of 2520	3536	Presupuesto proyecto P3787-SHN Barcelona.pdf.exe	82
PID 3536 wrote to memory of 2520	3536	Presupuesto proyecto P3787-SHN Barcelona.pdf.exe	82
PID 3536 wrote to memory of 2520	3536	Presupuesto proyecto P3787-SHN Barcelona.pdf.exe	82
PID 2520 wrote to memory of 1508	2520	onhaomfun.exe	83
PID 2520 wrote to memory of 1508	2520	onhaomfun.exe	83
PID 2520 wrote to memory of 1508	2520	onhaomfun.exe	83
PID 2520 wrote to memory of 1508	2520	onhaomfun.exe	83
PID 2520 wrote to memory of 1508	2520	onhaomfun.exe	83
PID 2520 wrote to memory of 1508	2520	onhaomfun.exe	83
PID 2520 wrote to memory of 1508	2520	onhaomfun.exe	83
PID 2520 wrote to memory of 1508	2520	onhaomfun.exe	83
PID 1508 wrote to memory of 4624	1508	onhaomfun.exe	84
PID 1508 wrote to memory of 4624	1508	onhaomfun.exe	84
PID 1508 wrote to memory of 4624	1508	onhaomfun.exe	84
PID 1508 wrote to memory of 4624	1508	onhaomfun.exe	84
PID 1508 wrote to memory of 4624	1508	onhaomfun.exe	84
PID 1508 wrote to memory of 4624	1508	onhaomfun.exe	84
PID 1508 wrote to memory of 4624	1508	onhaomfun.exe	84
PID 1508 wrote to memory of 4624	1508	onhaomfun.exe	84
PID 3344 wrote to memory of 4624	3344	WerFault.exe	84
PID 3344 wrote to memory of 4624	3344	WerFault.exe	84
PID 1508 wrote to memory of 4300	1508	onhaomfun.exe	91
PID 1508 wrote to memory of 4300	1508	onhaomfun.exe	91
PID 1508 wrote to memory of 4300	1508	onhaomfun.exe	91
PID 1508 wrote to memory of 4300	1508	onhaomfun.exe	91
PID 1508 wrote to memory of 4300	1508	onhaomfun.exe	91
PID 1508 wrote to memory of 4300	1508	onhaomfun.exe	91
PID 1508 wrote to memory of 4300	1508	onhaomfun.exe	91
PID 1508 wrote to memory of 4300	1508	onhaomfun.exe	91
PID 4300 wrote to memory of 3120	4300	iexplore.exe	93
PID 4300 wrote to memory of 3120	4300	iexplore.exe	93
PID 4300 wrote to memory of 3120	4300	iexplore.exe	93
PID 4300 wrote to memory of 3120	4300	iexplore.exe	93
PID 4300 wrote to memory of 3120	4300	iexplore.exe	93
PID 4300 wrote to memory of 3120	4300	iexplore.exe	93
PID 4300 wrote to memory of 3120	4300	iexplore.exe	93
PID 4300 wrote to memory of 3120	4300	iexplore.exe	93
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 1856	4300	iexplore.exe	94
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2904	4300	iexplore.exe	95
PID 4300 wrote to memory of 2572	4300	iexplore.exe	96
PID 4300 wrote to memory of 2572	4300	iexplore.exe	96
PID 4300 wrote to memory of 2572	4300	iexplore.exe	96
PID 4300 wrote to memory of 2572	4300	iexplore.exe	96
PID 4300 wrote to memory of 2572	4300	iexplore.exe	96
PID 4300 wrote to memory of 2572	4300	iexplore.exe	96
PID 4300 wrote to memory of 2572	4300	iexplore.exe	96
PID 4300 wrote to memory of 2572	4300	iexplore.exe	96
PID 4300 wrote to memory of 4652	4300	iexplore.exe	97

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	onhaomfun.exe

C:\Users\Admin\AppData\Local\Temp\Presupuesto proyecto P3787-SHN Barcelona.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Presupuesto proyecto P3787-SHN Barcelona.pdf.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3536
- C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe
  C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe C:\Users\Admin\AppData\Local\Temp\purggfce
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2520
- - C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe
    C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe C:\Users\Admin\AppData\Local\Temp\purggfce
    3⤵
    - Executes dropped EXE
    - Windows security modification
    - Checks whether UAC is enabled
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    - System policy modification
    PID:1508
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      C:\Users\Admin\AppData\Local\Temp\purggfce
      4⤵
      PID:4624
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4624 -s 84
        5⤵
        Program crash
        
        PID:4280
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      C:\Users\Admin\AppData\Local\Temp\purggfce
      4⤵
      Adds policy Run key to start application
      Adds Run key to start application
      Suspicious use of SetThreadContext
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4300
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra0.txt"
        5⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3120
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra1.txt"
        5⤵
        Accesses Microsoft Outlook accounts
        
        PID:1856
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra2.txt"
        5⤵
        Suspicious behavior: EnumeratesProcesses
        
        PID:2904
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra3.txt"
        5⤵
        
        PID:2572
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra4.txt"
        5⤵
        
        PID:4652
      - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 4652 -s 84
        6⤵
        Program crash
        
        PID:3136
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra4.txt"
        5⤵
        
        PID:4900

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4624 -ip 4624
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
- Suspicious use of WriteProcessMemory
PID:3344

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:4936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4652 -ip 4652
1⤵
- Suspicious use of NtCreateProcessExOtherParentProcess
PID:2132

C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
1⤵
- Drops file in Windows directory
- Suspicious use of AdjustPrivilegeToken
PID:1348

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Bypass User Account Control

T1088

Defense Evasion

Bypass User Account Control

T1088

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1508-134-0x0000000000400000-0x000000000042C000-memory.dmp

Download

memory/1508-138-0x0000000000400000-0x000000000042C000-memory.dmp

Download

memory/4936-139-0x0000022293F50000-0x0000022293F60000-memory.dmp

Download

memory/4936-140-0x0000022294620000-0x0000022294630000-memory.dmp

Download

memory/4936-141-0x0000022296CD0000-0x0000022296CD4000-memory.dmp

Download