xpertrat | 5c1fec4300276bd8bd042cf24f256de87350ad32a456578da4eb364de9f3fbfc

Analysis

max time kernel
19s
max time network
124s
platform
windows10_x64
resource
win10v20210408
submitted
13-07-2021 08:54

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General

Target

ee759b97c88356e23b04afa427c6cb94.exe
Size

172KB
MD5

ee759b97c88356e23b04afa427c6cb94
SHA1

439eba6c162e5512533ada4576de9f0e32def9d7
SHA256

5c1fec4300276bd8bd042cf24f256de87350ad32a456578da4eb364de9f3fbfc
SHA512

0447961f3ecfdfb5369cdd6f7bbc8d3455dcc8eaece606c85b9774f9c7981f26fea32133ea1c5214bbf73caea8c936257a1b349d2e7cee171f508ad1d4f050a0

Score

10^/10

xpertrat bxk evasion persistence rat trojan upx

Malware Config

Extracted

Family

xpertrat

Version

3.1.9

Botnet

BXK

ioxg.ix.tc:4000

Mutex

R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6

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 2 IoCs

resource	yara_rule
behavioral2/memory/3676-118-0x0000000000400000-0x0000000000444000-memory.dmp	xpertrat
behavioral2/memory/3676-119-0x0000000000401364-mapping.dmp	xpertrat

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3940-133-0x0000000000411654-mapping.dmp	MailPassView
behavioral2/memory/3940-132-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/1832-136-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView
behavioral2/memory/1832-137-0x0000000000442F04-mapping.dmp	WebBrowserPassView

Nirsoft 6 IoCs

resource	yara_rule
behavioral2/memory/3940-133-0x0000000000411654-mapping.dmp	Nirsoft
behavioral2/memory/3940-132-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/1832-136-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral2/memory/1832-137-0x0000000000442F04-mapping.dmp	Nirsoft
behavioral2/memory/744-147-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft
behavioral2/memory/744-148-0x000000000040C2A8-mapping.dmp	Nirsoft

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\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.exe"	iexplore.exe

UPX packed file 2 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/740-126-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/3184-141-0x0000000000400000-0x0000000000416000-memory.dmp	upx

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"	ee759b97c88356e23b04afa427c6cb94.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\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.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\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6 = "C:\\Users\\Admin\\AppData\\Roaming\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6.exe"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\SOFTWARE\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"	ee759b97c88356e23b04afa427c6cb94.exe

Program crash 3 IoCs

pid	pid_target	Process	procid_target
4024	3192	WerFault.exe	75
3956	3936	WerFault.exe	83
2428	544	WerFault.exe	88

Suspicious use of SetThreadContext 9 IoCs

description	pid	Process	procid_target
PID 652 set thread context of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 set thread context of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 3676 set thread context of 740	3676	iexplore.exe	82
PID 3676 set thread context of 3936	3676	iexplore.exe	83
PID 3676 set thread context of 3940	3676	iexplore.exe	85
PID 3676 set thread context of 1832	3676	iexplore.exe	86
PID 3676 set thread context of 3184	3676	iexplore.exe	87
PID 3676 set thread context of 544	3676	iexplore.exe	88
PID 3676 set thread context of 744	3676	iexplore.exe	90

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
652	ee759b97c88356e23b04afa427c6cb94.exe
652	ee759b97c88356e23b04afa427c6cb94.exe
652	ee759b97c88356e23b04afa427c6cb94.exe
652	ee759b97c88356e23b04afa427c6cb94.exe
652	ee759b97c88356e23b04afa427c6cb94.exe
652	ee759b97c88356e23b04afa427c6cb94.exe
740	iexplore.exe
740	iexplore.exe
1832	iexplore.exe
1832	iexplore.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3676	iexplore.exe
Token: SeDebugPrivilege	740	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
652	ee759b97c88356e23b04afa427c6cb94.exe
3676	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 652 wrote to memory of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 wrote to memory of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 wrote to memory of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 wrote to memory of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 wrote to memory of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 wrote to memory of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 wrote to memory of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 wrote to memory of 3192	652	ee759b97c88356e23b04afa427c6cb94.exe	75
PID 652 wrote to memory of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 652 wrote to memory of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 652 wrote to memory of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 652 wrote to memory of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 652 wrote to memory of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 652 wrote to memory of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 652 wrote to memory of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 652 wrote to memory of 3676	652	ee759b97c88356e23b04afa427c6cb94.exe	80
PID 3676 wrote to memory of 740	3676	iexplore.exe	82
PID 3676 wrote to memory of 740	3676	iexplore.exe	82
PID 3676 wrote to memory of 740	3676	iexplore.exe	82
PID 3676 wrote to memory of 740	3676	iexplore.exe	82
PID 3676 wrote to memory of 740	3676	iexplore.exe	82
PID 3676 wrote to memory of 740	3676	iexplore.exe	82
PID 3676 wrote to memory of 740	3676	iexplore.exe	82
PID 3676 wrote to memory of 740	3676	iexplore.exe	82
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3936	3676	iexplore.exe	83
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 3940	3676	iexplore.exe	85
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 1832	3676	iexplore.exe	86
PID 3676 wrote to memory of 3184	3676	iexplore.exe	87
PID 3676 wrote to memory of 3184	3676	iexplore.exe	87
PID 3676 wrote to memory of 3184	3676	iexplore.exe	87
PID 3676 wrote to memory of 3184	3676	iexplore.exe	87
PID 3676 wrote to memory of 3184	3676	iexplore.exe	87
PID 3676 wrote to memory of 3184	3676	iexplore.exe	87
PID 3676 wrote to memory of 3184	3676	iexplore.exe	87
PID 3676 wrote to memory of 3184	3676	iexplore.exe	87
PID 3676 wrote to memory of 544	3676	iexplore.exe	88
PID 3676 wrote to memory of 544	3676	iexplore.exe	88
PID 3676 wrote to memory of 544	3676	iexplore.exe	88
PID 3676 wrote to memory of 544	3676	iexplore.exe	88
PID 3676 wrote to memory of 544	3676	iexplore.exe	88

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"	ee759b97c88356e23b04afa427c6cb94.exe

C:\Users\Admin\AppData\Local\Temp\ee759b97c88356e23b04afa427c6cb94.exe
"C:\Users\Admin\AppData\Local\Temp\ee759b97c88356e23b04afa427c6cb94.exe"
1⤵
- 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:652
- C:\Program Files (x86)\Internet Explorer\iexplore.exe
  C:\Users\Admin\AppData\Local\Temp\ee759b97c88356e23b04afa427c6cb94.exe
  2⤵
  PID:3192
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3192 -s 92
    3⤵
    - Program crash
    PID:4024
- C:\Program Files (x86)\Internet Explorer\iexplore.exe
  C:\Users\Admin\AppData\Local\Temp\ee759b97c88356e23b04afa427c6cb94.exe
  2⤵
  - 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:3676
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\ceidsucbh0.txt"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:740
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\ceidsucbh1.txt"
    3⤵
    PID:3936
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3936 -s 92
      4⤵
      Program crash
      PID:3956
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\ceidsucbh1.txt"
    3⤵
    PID:3940
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\ceidsucbh2.txt"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1832
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\ceidsucbh3.txt"
    3⤵
    PID:3184
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\ceidsucbh4.txt"
    3⤵
    PID:544
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 544 -s 92
      4⤵
      Program crash
      PID:2428
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\ceidsucbh4.txt"
    3⤵
    PID:744

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/740-126-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/744-147-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1832-136-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/3184-141-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3676-123-0x0000000003721000-0x000000000381D000-memory.dmp

Filesize
1008KB

Download
memory/3676-122-0x0000000003720000-0x0000000003873000-memory.dmp

Filesize
1.3MB

Download
memory/3676-118-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/3940-132-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download