xpertrat | bda50ff249b947617d9551c717e78131ed32bf77db9dc5b7591d3e1af6cb2f1a

Analysis

max time kernel
150s
max time network
193s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
15/03/2022, 17:52

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General

Target
gunzipped.exe
Size 773KB
Sample220315-wfrmeaebf5
SHA256 bda50ff249b947617d9551c717e78131ed32bf77db9dc5b7591d3e1af6cb2f1a
MD5 fd5a0326a71e89b2ff144ea336fac113
SHA1 aa6b046a0ed889b59cdb0ee9a957c4c6d542e233
SHA512 51a75041b8fe9dab9cb51e28b39a497eff7ccb4c81311223ec92492cd3ddcfb6bc91ebf555f61a8b25423d81fd692920b44980ab306acb3b8451b633f297b800
MD5 SHA1 SHA512

Score

10^/10

xpertrat collection evasion persistence rat trojan

Malware Config

Signatures

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\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6 = "C:\\Users\\Admin\\AppData\\Roaming\\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6.exe"	iexplore.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"	gunzipped.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\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6 = "C:\\Users\\Admin\\AppData\\Roaming\\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6.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\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6 = "C:\\Users\\Admin\\AppData\\Roaming\\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6.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"	gunzipped.exe

Program crash 4 IoCs

pid	pid_target	Process	procid_target
4272	2096	WerFault.exe	94
2308	3408	WerFault.exe	99
4716	3408	WerFault.exe	99
4284	3160	WerFault.exe	104

Suspicious use of SetThreadContext 10 IoCs

description	pid	Process	procid_target
PID 1624 set thread context of 520	1624	gunzipped.exe	90
PID 520 set thread context of 2276	520	gunzipped.exe	91
PID 2276 set thread context of 2992	2276	iexplore.exe	92
PID 2276 set thread context of 4016	2276	iexplore.exe	93
PID 2276 set thread context of 2096	2276	iexplore.exe	94
PID 2276 set thread context of 3092	2276	iexplore.exe	98
PID 2276 set thread context of 3408	2276	iexplore.exe	99
PID 2276 set thread context of 3160	2276	iexplore.exe	104
PID 2276 set thread context of 5060	2276	iexplore.exe	107
PID 2276 set thread context of 5108	2276	iexplore.exe	108

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
520	gunzipped.exe
520	gunzipped.exe
2992	iexplore.exe
2992	iexplore.exe
520	gunzipped.exe
520	gunzipped.exe
3092	iexplore.exe
3092	iexplore.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2276	iexplore.exe
Token: SeDebugPrivilege	2992	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
520	gunzipped.exe
2276	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1624 wrote to memory of 520	1624	gunzipped.exe	90
PID 1624 wrote to memory of 520	1624	gunzipped.exe	90
PID 1624 wrote to memory of 520	1624	gunzipped.exe	90
PID 1624 wrote to memory of 520	1624	gunzipped.exe	90
PID 1624 wrote to memory of 520	1624	gunzipped.exe	90
PID 1624 wrote to memory of 520	1624	gunzipped.exe	90
PID 1624 wrote to memory of 520	1624	gunzipped.exe	90
PID 520 wrote to memory of 2276	520	gunzipped.exe	91
PID 520 wrote to memory of 2276	520	gunzipped.exe	91
PID 520 wrote to memory of 2276	520	gunzipped.exe	91
PID 520 wrote to memory of 2276	520	gunzipped.exe	91
PID 520 wrote to memory of 2276	520	gunzipped.exe	91
PID 520 wrote to memory of 2276	520	gunzipped.exe	91
PID 520 wrote to memory of 2276	520	gunzipped.exe	91
PID 520 wrote to memory of 2276	520	gunzipped.exe	91
PID 2276 wrote to memory of 2992	2276	iexplore.exe	92
PID 2276 wrote to memory of 2992	2276	iexplore.exe	92
PID 2276 wrote to memory of 2992	2276	iexplore.exe	92
PID 2276 wrote to memory of 2992	2276	iexplore.exe	92
PID 2276 wrote to memory of 2992	2276	iexplore.exe	92
PID 2276 wrote to memory of 2992	2276	iexplore.exe	92
PID 2276 wrote to memory of 2992	2276	iexplore.exe	92
PID 2276 wrote to memory of 2992	2276	iexplore.exe	92
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 4016	2276	iexplore.exe	93
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 2096	2276	iexplore.exe	94
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3092	2276	iexplore.exe	98
PID 2276 wrote to memory of 3408	2276	iexplore.exe	99
PID 2276 wrote to memory of 3408	2276	iexplore.exe	99
PID 2276 wrote to memory of 3408	2276	iexplore.exe	99
PID 2276 wrote to memory of 3408	2276	iexplore.exe	99
PID 2276 wrote to memory of 3408	2276	iexplore.exe	99
PID 2276 wrote to memory of 3408	2276	iexplore.exe	99
PID 2276 wrote to memory of 3408	2276	iexplore.exe	99
PID 2276 wrote to memory of 3408	2276	iexplore.exe	99
PID 2276 wrote to memory of 3160	2276	iexplore.exe	104
PID 2276 wrote to memory of 3160	2276	iexplore.exe	104
PID 2276 wrote to memory of 3160	2276	iexplore.exe	104
PID 2276 wrote to memory of 3160	2276	iexplore.exe	104
PID 2276 wrote to memory of 3160	2276	iexplore.exe	104
PID 2276 wrote to memory of 3160	2276	iexplore.exe	104

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"	gunzipped.exe

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
"C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1624
- C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
  "C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"
  2⤵
  - 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:520
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
    3⤵
    - 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:2276
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\olhvsheey0.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2992
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\olhvsheey1.txt"
      4⤵
      Accesses Microsoft Outlook accounts
      PID:4016
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\olhvsheey2.txt"
      4⤵
      PID:2096
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2096 -s 84
        5⤵
        Program crash
        
        PID:4272
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\olhvsheey2.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:3092
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\olhvsheey3.txt"
      4⤵
      PID:3408
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3408 -s 92
        5⤵
        Program crash
        
        PID:2308
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3408 -s 100
        5⤵
        Program crash
        
        PID:4716
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\olhvsheey3.txt"
      4⤵
      PID:3160
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3160 -s 84
        5⤵
        Program crash
        
        PID:4284
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\olhvsheey3.txt"
      4⤵
      PID:5060
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\Q4V8N5Y3-O0F7-P7T5-W113-K7R6L4T0H6H6\olhvsheey4.txt"
      4⤵
      PID:5108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 180 -p 2096 -ip 2096
1⤵
PID:1420

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 200 -p 3408 -ip 3408
1⤵
PID:3788

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3408 -ip 3408
1⤵
PID:216

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 3160 -ip 3160
1⤵
PID:4676

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

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Downloads

memory/520-137-0x0000000000400000-0x000000000042C000-memory.dmp

Download

memory/520-139-0x0000000000400000-0x000000000042C000-memory.dmp

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memory/1624-130-0x0000000000DC0000-0x0000000000E88000-memory.dmp

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memory/1624-131-0x0000000005E40000-0x00000000063E4000-memory.dmp

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memory/1624-132-0x0000000005890000-0x0000000005922000-memory.dmp

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memory/1624-133-0x0000000075370000-0x0000000075B20000-memory.dmp

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memory/1624-134-0x0000000005840000-0x000000000584A000-memory.dmp

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memory/1624-135-0x0000000005790000-0x0000000005822000-memory.dmp

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memory/1624-136-0x00000000095A0000-0x000000000963C000-memory.dmp

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