xpertrat | 88b664781d7b10fc5130cf6453fbde5b26b129f0e2f5e002d62be833b0fcd020

General

Target
gunzipped.exe
Size 765KB
Sample201027-s29tmeanws
SHA256 88b664781d7b10fc5130cf6453fbde5b26b129f0e2f5e002d62be833b0fcd020
MD5 2f7687172e06c6868282ba3e1428aaeb
SHA1 3c280b0e41b375b1748884eb1e3413c79f8c5c9a
SHA512 952301e069759ffb1c7cb71088525cd7c3460398e251d9c375a8dcb9123d3cf41e1fc4f19114ab7eae849acb3c044ccba39ec28184bb7f5197b4a3acbc406151
MD5 SHA1 SHA512

Score

10^/10

xpertrat test evasion persistence rat trojan

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

Test

C2

185.244.30.211:4576

Mutex

G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8

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

XpertRAT Core Payload 3 IoCs

resource	yara_rule
behavioral2/memory/3344-15-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat
behavioral2/memory/3344-16-0x0000000000401364-mapping.dmp	xpertrat
behavioral2/memory/3344-17-0x0000000000400000-0x0000000000443000-memory.dmp	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\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8 = "C:\\Users\\Admin\\AppData\\Roaming\\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8\\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8.exe"	iexplore.exe

Deletes itself 1 IoCs

pid	Process
1148	notepad.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

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8 = "C:\\Users\\Admin\\AppData\\Roaming\\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8\\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8.exe"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2627584638-3284755310-3019450177-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2627584638-3284755310-3019450177-1000\Software\Microsoft\Windows\CurrentVersion\Run\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8 = "C:\\Users\\Admin\\AppData\\Roaming\\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8\\G2L6E3O1-E775-G5K4-R4C2-P5F660S1R4A8.exe"	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run	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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4008 set thread context of 3920	4008	gunzipped.exe	77
PID 3920 set thread context of 3344	3920	gunzipped.exe	78

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3920	gunzipped.exe
3920	gunzipped.exe
3920	gunzipped.exe
3920	gunzipped.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3344	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3920	gunzipped.exe
3344	iexplore.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4008 wrote to memory of 3920	4008	gunzipped.exe	77
PID 4008 wrote to memory of 3920	4008	gunzipped.exe	77
PID 4008 wrote to memory of 3920	4008	gunzipped.exe	77
PID 4008 wrote to memory of 3920	4008	gunzipped.exe	77
PID 4008 wrote to memory of 3920	4008	gunzipped.exe	77
PID 4008 wrote to memory of 3920	4008	gunzipped.exe	77
PID 4008 wrote to memory of 3920	4008	gunzipped.exe	77
PID 3920 wrote to memory of 3344	3920	gunzipped.exe	78
PID 3920 wrote to memory of 3344	3920	gunzipped.exe	78
PID 3920 wrote to memory of 3344	3920	gunzipped.exe	78
PID 3920 wrote to memory of 3344	3920	gunzipped.exe	78
PID 3920 wrote to memory of 3344	3920	gunzipped.exe	78
PID 3920 wrote to memory of 3344	3920	gunzipped.exe	78
PID 3920 wrote to memory of 3344	3920	gunzipped.exe	78
PID 3920 wrote to memory of 3344	3920	gunzipped.exe	78
PID 3344 wrote to memory of 1148	3344	iexplore.exe	79
PID 3344 wrote to memory of 1148	3344	iexplore.exe	79
PID 3344 wrote to memory of 1148	3344	iexplore.exe	79
PID 3344 wrote to memory of 1148	3344	iexplore.exe	79

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:4008
- C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
  "{path}"
  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:3920
- - 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 AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3344
  - - C:\Windows\SysWOW64\notepad.exe
      notepad.exe
      4⤵
      Deletes itself
      PID:1148

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

2

T1060

Privilege Escalation

Bypass User Account Control

1

T1088

Defense Evasion

Bypass User Account Control

1

T1088

Disabling Security Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3344-17-0x0000000000400000-0x0000000000443000-memory.dmp

Download

memory/3344-15-0x0000000000400000-0x0000000000443000-memory.dmp

Download

memory/3920-10-0x0000000000400000-0x000000000042C000-memory.dmp

Download

memory/3920-12-0x0000000000400000-0x000000000042C000-memory.dmp

Download

memory/4008-5-0x0000000007730000-0x0000000007731000-memory.dmp

Download

memory/4008-9-0x000000000AE70000-0x000000000AE71000-memory.dmp

Download

memory/4008-8-0x00000000092E0000-0x0000000009357000-memory.dmp

Download

memory/4008-7-0x000000000ADB0000-0x000000000ADC6000-memory.dmp

Download

memory/4008-6-0x0000000007700000-0x0000000007701000-memory.dmp

Download

memory/4008-0-0x0000000073590000-0x0000000073C7E000-memory.dmp

Download

memory/4008-4-0x0000000007B50000-0x0000000007B51000-memory.dmp

Download

memory/4008-3-0x00000000075C0000-0x0000000007645000-memory.dmp

Download

memory/4008-1-0x0000000000750000-0x0000000000751000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads