xpertrat | bc2a5e452669de43c4f4533c995b515bace2941ea5b45bb537085b204ee5d54b

Analysis

max time kernel
146s
max time network
154s
platform
windows7_x64
resource
win7-en-20210920
submitted
22/09/2021, 06:24

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General

Target
49af0abba03a7d559171f378728e9bc7.exe
Size 33KB
Sample210922-g53nmsedfl
SHA256 bc2a5e452669de43c4f4533c995b515bace2941ea5b45bb537085b204ee5d54b
MD5 49af0abba03a7d559171f378728e9bc7
SHA1 7e6e1ccf693bb62f2a36119996583228a9e5c665
SHA512 d155349a6dae76775b26a96ec00a8dc860749eb46450c6dcc479303afa01325b1fb31b41c8adac3cbabb2b17c7b23a6768949a8bf5221c3edee0a25082e71a8f
MD5 SHA1 SHA512

Score

10^/10

xpertrat test evasion persistence rat trojan upx

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

Test

kapasky-antivirus.firewall-gateway.net:4000

Mutex

L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0

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
behavioral1/memory/288-71-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat
behavioral1/memory/288-72-0x0000000000401364-mapping.dmp	xpertrat

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1160-82-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/1160-83-0x0000000000411654-mapping.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1348-85-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView
behavioral1/memory/1348-86-0x0000000000442F04-mapping.dmp	WebBrowserPassView

Nirsoft 7 IoCs

resource	yara_rule
behavioral1/memory/936-80-0x0000000000423BC0-mapping.dmp	Nirsoft
behavioral1/memory/1160-82-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/1160-83-0x0000000000411654-mapping.dmp	Nirsoft
behavioral1/memory/1348-85-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral1/memory/1348-86-0x0000000000442F04-mapping.dmp	Nirsoft
behavioral1/memory/1780-92-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft
behavioral1/memory/1780-93-0x000000000040C2A8-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\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.exe"	iexplore.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/936-79-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/1208-89-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Deletes itself 1 IoCs

pid	Process
1768	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"	49af0abba03a7d559171f378728e9bc7.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-1-5-21-3456797065-1076791440-4146276586-1000\Software\Microsoft\Windows\CurrentVersion\Run\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.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\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0 = "C:\\Users\\Admin\\AppData\\Roaming\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0.exe"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-3456797065-1076791440-4146276586-1000\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"	49af0abba03a7d559171f378728e9bc7.exe

Suspicious use of SetThreadContext 7 IoCs

description	pid	Process	procid_target
PID 1048 set thread context of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1828 set thread context of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 288 set thread context of 936	288	iexplore.exe	34
PID 288 set thread context of 1160	288	iexplore.exe	35
PID 288 set thread context of 1348	288	iexplore.exe	36
PID 288 set thread context of 1208	288	iexplore.exe	38
PID 288 set thread context of 1780	288	iexplore.exe	39

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 5 IoCs

pid	Process
1628	powershell.exe
572	powershell.exe
1048	49af0abba03a7d559171f378728e9bc7.exe
1828	49af0abba03a7d559171f378728e9bc7.exe
1828	49af0abba03a7d559171f378728e9bc7.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1628	powershell.exe
Token: SeDebugPrivilege	572	powershell.exe
Token: SeDebugPrivilege	1048	49af0abba03a7d559171f378728e9bc7.exe
Token: SeDebugPrivilege	288	iexplore.exe
Token: SeDebugPrivilege	936	iexplore.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1828	49af0abba03a7d559171f378728e9bc7.exe
288	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1048 wrote to memory of 1628	1048	49af0abba03a7d559171f378728e9bc7.exe	27
PID 1048 wrote to memory of 1628	1048	49af0abba03a7d559171f378728e9bc7.exe	27
PID 1048 wrote to memory of 1628	1048	49af0abba03a7d559171f378728e9bc7.exe	27
PID 1048 wrote to memory of 1628	1048	49af0abba03a7d559171f378728e9bc7.exe	27
PID 1048 wrote to memory of 572	1048	49af0abba03a7d559171f378728e9bc7.exe	29
PID 1048 wrote to memory of 572	1048	49af0abba03a7d559171f378728e9bc7.exe	29
PID 1048 wrote to memory of 572	1048	49af0abba03a7d559171f378728e9bc7.exe	29
PID 1048 wrote to memory of 572	1048	49af0abba03a7d559171f378728e9bc7.exe	29
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1048 wrote to memory of 1828	1048	49af0abba03a7d559171f378728e9bc7.exe	31
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 1828 wrote to memory of 288	1828	49af0abba03a7d559171f378728e9bc7.exe	32
PID 288 wrote to memory of 1768	288	iexplore.exe	33
PID 288 wrote to memory of 1768	288	iexplore.exe	33
PID 288 wrote to memory of 1768	288	iexplore.exe	33
PID 288 wrote to memory of 1768	288	iexplore.exe	33
PID 288 wrote to memory of 1768	288	iexplore.exe	33
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 936	288	iexplore.exe	34
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1160	288	iexplore.exe	35
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1348	288	iexplore.exe	36
PID 288 wrote to memory of 1208	288	iexplore.exe	38
PID 288 wrote to memory of 1208	288	iexplore.exe	38

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"	49af0abba03a7d559171f378728e9bc7.exe

C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.exe
"C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1048
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Start-Sleep -Seconds 3
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1628
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Start-Sleep -s 15
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:572
- C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.exe
  C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.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:1828
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.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:288
  - - C:\Windows\SysWOW64\notepad.exe
      notepad.exe
      4⤵
      Deletes itself
      PID:1768
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\esfweooik0.txt"
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:936
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\esfweooik1.txt"
      4⤵
      PID:1160
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\esfweooik2.txt"
      4⤵
      PID:1348
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\esfweooik3.txt"
      4⤵
      PID:1208
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\esfweooik4.txt"
      4⤵
      PID:1780

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/288-73-0x00000000005E0000-0x0000000000733000-memory.dmp

Download

memory/288-71-0x0000000000400000-0x0000000000443000-memory.dmp

Download

memory/936-79-0x0000000000400000-0x0000000000426000-memory.dmp

Download

memory/1048-56-0x0000000004C30000-0x0000000004C31000-memory.dmp

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memory/1048-65-0x0000000000EE0000-0x0000000000F2F000-memory.dmp

Download

memory/1048-66-0x0000000000C50000-0x0000000000C80000-memory.dmp

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memory/1048-54-0x0000000001020000-0x0000000001021000-memory.dmp

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memory/1160-82-0x0000000000400000-0x000000000041B000-memory.dmp

Download

memory/1208-89-0x0000000000400000-0x0000000000416000-memory.dmp

Download

memory/1348-85-0x0000000000400000-0x0000000000459000-memory.dmp

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memory/1628-58-0x00000000755A1000-0x00000000755A3000-memory.dmp

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memory/1628-59-0x0000000002460000-0x00000000030AA000-memory.dmp

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memory/1628-60-0x0000000002460000-0x00000000030AA000-memory.dmp

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memory/1628-61-0x0000000002460000-0x00000000030AA000-memory.dmp

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memory/1780-92-0x0000000000400000-0x0000000000415000-memory.dmp

Download

memory/1828-67-0x0000000000400000-0x000000000042C000-memory.dmp

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