xpertrat | 862bf290697cfbd5cb41966b550e8b163aac94d6e07461c6e4353ea6fad62e83

Analysis

max time kernel
140s
max time network
142s
platform
windows7_x64
resource
win7-en
submitted
06/09/2021, 11:49

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General

Target
EXCEL.exe
Size 911KB
Sample210906-nzbfjaebem
SHA256 862bf290697cfbd5cb41966b550e8b163aac94d6e07461c6e4353ea6fad62e83
MD5 eefa3dd3a36a5decba3c42072ef0798e
SHA1 a51f4f499fc618b9dc36e079258ed3c087e2bae5
SHA512 6e28230749c2938279e32d4c2631ea6193f28c2a5d5cd38f4176dc8e5e70a986db866e770ff32e4eaad3233b8e336f66877e1e2c70c9ef5ec2f3912f9df7d6a2
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/1964-100-0x0000000000401364-mapping.dmp	xpertrat
behavioral1/memory/1964-99-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1532-110-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/1532-111-0x0000000000411654-mapping.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1692-113-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView
behavioral1/memory/1692-114-0x0000000000442F04-mapping.dmp	WebBrowserPassView

Nirsoft 6 IoCs

resource	yara_rule
behavioral1/memory/1532-110-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/1532-111-0x0000000000411654-mapping.dmp	Nirsoft
behavioral1/memory/1692-113-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral1/memory/1692-114-0x0000000000442F04-mapping.dmp	Nirsoft
behavioral1/memory/532-120-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft
behavioral1/memory/532-121-0x000000000040C2A8-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/1396-107-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/564-117-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Deletes itself 1 IoCs

pid	Process
608	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"	EXCEL.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-1-5-21-1669990088-476967504-438132596-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1669990088-476967504-438132596-1000\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

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"	EXCEL.exe

Suspicious use of SetThreadContext 10 IoCs

description	pid	Process	procid_target
PID 736 set thread context of 2008	736	EXCEL.exe	43
PID 2008 set thread context of 1252	2008	EXCEL.exe	44
PID 2008 set thread context of 1516	2008	EXCEL.exe	45
PID 2008 set thread context of 1560	2008	EXCEL.exe	46
PID 2008 set thread context of 1964	2008	EXCEL.exe	47
PID 1964 set thread context of 1396	1964	iexplore.exe	49
PID 1964 set thread context of 1532	1964	iexplore.exe	50
PID 1964 set thread context of 1692	1964	iexplore.exe	51
PID 1964 set thread context of 564	1964	iexplore.exe	53
PID 1964 set thread context of 532	1964	iexplore.exe	54

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 18 IoCs

pid	Process
1980	powershell.exe
1468	powershell.exe
2024	powershell.exe
1624	powershell.exe
1320	powershell.exe
324	powershell.exe
736	EXCEL.exe
736	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe
2008	EXCEL.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	1980	powershell.exe
Token: SeIncreaseQuotaPrivilege	1980	powershell.exe
Token: SeSecurityPrivilege	1980	powershell.exe
Token: SeTakeOwnershipPrivilege	1980	powershell.exe
Token: SeLoadDriverPrivilege	1980	powershell.exe
Token: SeSystemProfilePrivilege	1980	powershell.exe
Token: SeSystemtimePrivilege	1980	powershell.exe
Token: SeProfSingleProcessPrivilege	1980	powershell.exe
Token: SeIncBasePriorityPrivilege	1980	powershell.exe
Token: SeCreatePagefilePrivilege	1980	powershell.exe
Token: SeBackupPrivilege	1980	powershell.exe
Token: SeRestorePrivilege	1980	powershell.exe
Token: SeShutdownPrivilege	1980	powershell.exe
Token: SeDebugPrivilege	1980	powershell.exe
Token: SeSystemEnvironmentPrivilege	1980	powershell.exe
Token: SeRemoteShutdownPrivilege	1980	powershell.exe
Token: SeUndockPrivilege	1980	powershell.exe
Token: SeManageVolumePrivilege	1980	powershell.exe
Token: 33	1980	powershell.exe
Token: 34	1980	powershell.exe
Token: 35	1980	powershell.exe
Token: SeDebugPrivilege	1468	powershell.exe
Token: SeIncreaseQuotaPrivilege	1468	powershell.exe
Token: SeSecurityPrivilege	1468	powershell.exe
Token: SeTakeOwnershipPrivilege	1468	powershell.exe
Token: SeLoadDriverPrivilege	1468	powershell.exe
Token: SeSystemProfilePrivilege	1468	powershell.exe
Token: SeSystemtimePrivilege	1468	powershell.exe
Token: SeProfSingleProcessPrivilege	1468	powershell.exe
Token: SeIncBasePriorityPrivilege	1468	powershell.exe
Token: SeCreatePagefilePrivilege	1468	powershell.exe
Token: SeBackupPrivilege	1468	powershell.exe
Token: SeRestorePrivilege	1468	powershell.exe
Token: SeShutdownPrivilege	1468	powershell.exe
Token: SeDebugPrivilege	1468	powershell.exe
Token: SeSystemEnvironmentPrivilege	1468	powershell.exe
Token: SeRemoteShutdownPrivilege	1468	powershell.exe
Token: SeUndockPrivilege	1468	powershell.exe
Token: SeManageVolumePrivilege	1468	powershell.exe
Token: 33	1468	powershell.exe
Token: 34	1468	powershell.exe
Token: 35	1468	powershell.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeIncreaseQuotaPrivilege	2024	powershell.exe
Token: SeSecurityPrivilege	2024	powershell.exe
Token: SeTakeOwnershipPrivilege	2024	powershell.exe
Token: SeLoadDriverPrivilege	2024	powershell.exe
Token: SeSystemProfilePrivilege	2024	powershell.exe
Token: SeSystemtimePrivilege	2024	powershell.exe
Token: SeProfSingleProcessPrivilege	2024	powershell.exe
Token: SeIncBasePriorityPrivilege	2024	powershell.exe
Token: SeCreatePagefilePrivilege	2024	powershell.exe
Token: SeBackupPrivilege	2024	powershell.exe
Token: SeRestorePrivilege	2024	powershell.exe
Token: SeShutdownPrivilege	2024	powershell.exe
Token: SeDebugPrivilege	2024	powershell.exe
Token: SeSystemEnvironmentPrivilege	2024	powershell.exe
Token: SeRemoteShutdownPrivilege	2024	powershell.exe
Token: SeUndockPrivilege	2024	powershell.exe
Token: SeManageVolumePrivilege	2024	powershell.exe
Token: 33	2024	powershell.exe
Token: 34	2024	powershell.exe
Token: 35	2024	powershell.exe
Token: SeDebugPrivilege	1624	powershell.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2008	EXCEL.exe
1964	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 736 wrote to memory of 1980	736	EXCEL.exe	26
PID 736 wrote to memory of 1980	736	EXCEL.exe	26
PID 736 wrote to memory of 1980	736	EXCEL.exe	26
PID 736 wrote to memory of 1980	736	EXCEL.exe	26
PID 736 wrote to memory of 1468	736	EXCEL.exe	28
PID 736 wrote to memory of 1468	736	EXCEL.exe	28
PID 736 wrote to memory of 1468	736	EXCEL.exe	28
PID 736 wrote to memory of 1468	736	EXCEL.exe	28
PID 736 wrote to memory of 2024	736	EXCEL.exe	35
PID 736 wrote to memory of 2024	736	EXCEL.exe	35
PID 736 wrote to memory of 2024	736	EXCEL.exe	35
PID 736 wrote to memory of 2024	736	EXCEL.exe	35
PID 736 wrote to memory of 1624	736	EXCEL.exe	37
PID 736 wrote to memory of 1624	736	EXCEL.exe	37
PID 736 wrote to memory of 1624	736	EXCEL.exe	37
PID 736 wrote to memory of 1624	736	EXCEL.exe	37
PID 736 wrote to memory of 1320	736	EXCEL.exe	39
PID 736 wrote to memory of 1320	736	EXCEL.exe	39
PID 736 wrote to memory of 1320	736	EXCEL.exe	39
PID 736 wrote to memory of 1320	736	EXCEL.exe	39
PID 736 wrote to memory of 324	736	EXCEL.exe	41
PID 736 wrote to memory of 324	736	EXCEL.exe	41
PID 736 wrote to memory of 324	736	EXCEL.exe	41
PID 736 wrote to memory of 324	736	EXCEL.exe	41
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 736 wrote to memory of 2008	736	EXCEL.exe	43
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1252	2008	EXCEL.exe	44
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1516	2008	EXCEL.exe	45
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1560	2008	EXCEL.exe	46
PID 2008 wrote to memory of 1964	2008	EXCEL.exe	47
PID 2008 wrote to memory of 1964	2008	EXCEL.exe	47

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"	EXCEL.exe

C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
"C:\Users\Admin\AppData\Local\Temp\EXCEL.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:736
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection -ComputerName youtube.com
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1980
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection -ComputerName google.com
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1468
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection -ComputerName facebook.com
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2024
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection -ComputerName outlook.com
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1624
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection -ComputerName bing.com
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1320
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection -ComputerName google.com
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:324
- C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
  C:\Users\Admin\AppData\Local\Temp\EXCEL.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:2008
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
    3⤵
    PID:1252
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
    3⤵
    PID:1516
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
    3⤵
    PID:1560
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    C:\Users\Admin\AppData\Local\Temp\EXCEL.exe
    3⤵
    - Adds policy Run key to start application
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of SetWindowsHookEx
    PID:1964
  - - C:\Windows\SysWOW64\notepad.exe
      notepad.exe
      4⤵
      Deletes itself
      PID:608
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\oigetytud0.txt"
      4⤵
      PID:1396
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\oigetytud1.txt"
      4⤵
      PID:1532
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\oigetytud2.txt"
      4⤵
      PID:1692
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\oigetytud3.txt"
      4⤵
      PID:564
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\oigetytud4.txt"
      4⤵
      PID:532

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/532-120-0x0000000000400000-0x0000000000415000-memory.dmp

Download

memory/564-117-0x0000000000400000-0x0000000000416000-memory.dmp

Download

memory/736-53-0x0000000000AD0000-0x0000000000AD1000-memory.dmp

Download

memory/736-55-0x0000000075E51000-0x0000000075E53000-memory.dmp

Download

memory/736-56-0x0000000004890000-0x0000000004891000-memory.dmp

Download

memory/736-88-0x0000000004DD0000-0x0000000004DF8000-memory.dmp

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memory/736-83-0x0000000002150000-0x00000000021A5000-memory.dmp

Download

memory/1320-77-0x00000000020D1000-0x00000000020D2000-memory.dmp

Download

memory/1320-78-0x00000000020D2000-0x00000000020D4000-memory.dmp

Download

memory/1320-76-0x00000000020D0000-0x00000000020D1000-memory.dmp

Download

memory/1396-107-0x0000000000400000-0x0000000000426000-memory.dmp

Download

memory/1468-65-0x0000000002220000-0x0000000002E6A000-memory.dmp

Download

memory/1532-110-0x0000000000400000-0x000000000041B000-memory.dmp

Download

memory/1692-113-0x0000000000400000-0x0000000000459000-memory.dmp

Download

memory/1964-101-0x0000000000600000-0x0000000000753000-memory.dmp

Download

memory/1964-99-0x0000000000400000-0x0000000000443000-memory.dmp

Download

memory/1980-59-0x0000000001E50000-0x0000000001E51000-memory.dmp

Download

memory/1980-60-0x0000000001E51000-0x0000000001E52000-memory.dmp

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memory/1980-61-0x0000000001E52000-0x0000000001E54000-memory.dmp

Download

memory/2008-89-0x0000000000400000-0x000000000042C000-memory.dmp

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