xpertrat | 6b22261ef9a97fde0923ffe05c7aa8317fd3b0e27c10fbc967f9961a5f39c105

Analysis

max time kernel
46s
max time network
128s
platform
windows10_x64
resource
win10v20210408
submitted
09/07/2021, 20:46

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General

Target
svchost.exe
Size 776KB
Sample210709-9pgfzrwe3n
SHA256 6b22261ef9a97fde0923ffe05c7aa8317fd3b0e27c10fbc967f9961a5f39c105
MD5 414ad28c17f6b49a2f825ffc49dbae02
SHA1 43a194b57fbaab18ee206adb1d16690c887f0734
SHA512 dde4855ebd23feb43c60e7dad21883867d97abe481dae2086933fc9f270d69a1ffe7506ba4e9b3c1a9ab93630fa6c9224a1d1918d8c6d77c47c4aad56823ffff
MD5 SHA1 SHA512

Score

10^/10

xpertrat bxk evasion persistence rat trojan upx

Malware Config

Extracted

Family

xpertrat

Version

3.1.9

Botnet

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/1896-131-0x0000000000400000-0x0000000000444000-memory.dmp	xpertrat
behavioral2/memory/1896-132-0x0000000000401364-mapping.dmp	xpertrat

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3936-145-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral2/memory/3936-146-0x0000000000411654-mapping.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2320-149-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView
behavioral2/memory/2320-150-0x0000000000442F04-mapping.dmp	WebBrowserPassView

Nirsoft 6 IoCs

resource	yara_rule
behavioral2/memory/3936-145-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral2/memory/3936-146-0x0000000000411654-mapping.dmp	Nirsoft
behavioral2/memory/2320-149-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral2/memory/2320-150-0x0000000000442F04-mapping.dmp	Nirsoft
behavioral2/memory/2264-158-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft
behavioral2/memory/2264-159-0x000000000040C2A8-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/3060-139-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral2/memory/2672-154-0x0000000000400000-0x0000000000416000-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"	svchost.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\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
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

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"	svchost.exe

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3860	2792	WerFault.exe	79
4020	2024	WerFault.exe	84

Suspicious use of SetThreadContext 9 IoCs

description	pid	Process	procid_target
PID 776 set thread context of 1356	776	svchost.exe	78
PID 1356 set thread context of 2792	1356	svchost.exe	79
PID 1356 set thread context of 1896	1356	svchost.exe	82
PID 1896 set thread context of 3060	1896	iexplore.exe	83
PID 1896 set thread context of 2024	1896	iexplore.exe	84
PID 1896 set thread context of 3936	1896	iexplore.exe	86
PID 1896 set thread context of 2320	1896	iexplore.exe	87
PID 1896 set thread context of 2672	1896	iexplore.exe	88
PID 1896 set thread context of 2264	1896	iexplore.exe	89

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1356	svchost.exe
1356	svchost.exe
1356	svchost.exe
1356	svchost.exe
3060	iexplore.exe
3060	iexplore.exe
2320	iexplore.exe
2320	iexplore.exe
1356	svchost.exe
1356	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1896	iexplore.exe
Token: SeDebugPrivilege	3060	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1356	svchost.exe
1896	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 776 wrote to memory of 1356	776	svchost.exe	78
PID 776 wrote to memory of 1356	776	svchost.exe	78
PID 776 wrote to memory of 1356	776	svchost.exe	78
PID 776 wrote to memory of 1356	776	svchost.exe	78
PID 776 wrote to memory of 1356	776	svchost.exe	78
PID 776 wrote to memory of 1356	776	svchost.exe	78
PID 776 wrote to memory of 1356	776	svchost.exe	78
PID 1356 wrote to memory of 2792	1356	svchost.exe	79
PID 1356 wrote to memory of 2792	1356	svchost.exe	79
PID 1356 wrote to memory of 2792	1356	svchost.exe	79
PID 1356 wrote to memory of 2792	1356	svchost.exe	79
PID 1356 wrote to memory of 2792	1356	svchost.exe	79
PID 1356 wrote to memory of 2792	1356	svchost.exe	79
PID 1356 wrote to memory of 2792	1356	svchost.exe	79
PID 1356 wrote to memory of 2792	1356	svchost.exe	79
PID 1356 wrote to memory of 1896	1356	svchost.exe	82
PID 1356 wrote to memory of 1896	1356	svchost.exe	82
PID 1356 wrote to memory of 1896	1356	svchost.exe	82
PID 1356 wrote to memory of 1896	1356	svchost.exe	82
PID 1356 wrote to memory of 1896	1356	svchost.exe	82
PID 1356 wrote to memory of 1896	1356	svchost.exe	82
PID 1356 wrote to memory of 1896	1356	svchost.exe	82
PID 1356 wrote to memory of 1896	1356	svchost.exe	82
PID 1896 wrote to memory of 3060	1896	iexplore.exe	83
PID 1896 wrote to memory of 3060	1896	iexplore.exe	83
PID 1896 wrote to memory of 3060	1896	iexplore.exe	83
PID 1896 wrote to memory of 3060	1896	iexplore.exe	83
PID 1896 wrote to memory of 3060	1896	iexplore.exe	83
PID 1896 wrote to memory of 3060	1896	iexplore.exe	83
PID 1896 wrote to memory of 3060	1896	iexplore.exe	83
PID 1896 wrote to memory of 3060	1896	iexplore.exe	83
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 2024	1896	iexplore.exe	84
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 3936	1896	iexplore.exe	86
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2320	1896	iexplore.exe	87
PID 1896 wrote to memory of 2672	1896	iexplore.exe	88
PID 1896 wrote to memory of 2672	1896	iexplore.exe	88
PID 1896 wrote to memory of 2672	1896	iexplore.exe	88
PID 1896 wrote to memory of 2672	1896	iexplore.exe	88
PID 1896 wrote to memory of 2672	1896	iexplore.exe	88
PID 1896 wrote to memory of 2672	1896	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"	svchost.exe

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:776
- C:\Users\Admin\AppData\Local\Temp\svchost.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:1356
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\svchost.exe
    3⤵
    PID:2792
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2792 -s 96
      4⤵
      Program crash
      PID:3860
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\svchost.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:1896
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\untcrfcdu0.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3060
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\untcrfcdu1.txt"
      4⤵
      PID:2024
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2024 -s 92
        5⤵
        Program crash
        
        PID:4020
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\untcrfcdu1.txt"
      4⤵
      PID:3936
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\untcrfcdu2.txt"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2320
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\untcrfcdu3.txt"
      4⤵
      PID:2672
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\untcrfcdu4.txt"
      4⤵
      PID:2264

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

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Downloads

memory/776-121-0x0000000002AE0000-0x0000000002AE2000-memory.dmp

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memory/776-118-0x0000000005500000-0x00000000059FE000-memory.dmp

Download

memory/776-119-0x0000000000FD0000-0x0000000000FD1000-memory.dmp

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memory/776-120-0x00000000087D0000-0x00000000087D1000-memory.dmp

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memory/776-114-0x00000000001A0000-0x00000000001A1000-memory.dmp

Download

memory/776-122-0x0000000008AB0000-0x0000000008B58000-memory.dmp

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memory/776-123-0x000000000B250000-0x000000000B2AA000-memory.dmp

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memory/776-117-0x0000000002AF0000-0x0000000002AF1000-memory.dmp

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memory/776-116-0x0000000005A00000-0x0000000005A01000-memory.dmp

Download

memory/1356-124-0x0000000000400000-0x000000000042C000-memory.dmp

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memory/1356-130-0x0000000000400000-0x000000000042C000-memory.dmp

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memory/1896-136-0x0000000003451000-0x000000000354D000-memory.dmp

Download

memory/1896-135-0x0000000003450000-0x00000000035A3000-memory.dmp

Download

memory/1896-131-0x0000000000400000-0x0000000000444000-memory.dmp

Download

memory/2264-158-0x0000000000400000-0x0000000000415000-memory.dmp

Download

memory/2320-149-0x0000000000400000-0x0000000000459000-memory.dmp

Download

memory/2672-154-0x0000000000400000-0x0000000000416000-memory.dmp

Download

memory/3060-139-0x0000000000400000-0x0000000000426000-memory.dmp

Download

memory/3936-145-0x0000000000400000-0x000000000041B000-memory.dmp

Download