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
MD5

414ad28c17f6b49a2f825ffc49dbae02
SHA1

43a194b57fbaab18ee206adb1d16690c887f0734
SHA256

6b22261ef9a97fde0923ffe05c7aa8317fd3b0e27c10fbc967f9961a5f39c105
SHA512

dde4855ebd23feb43c60e7dad21883867d97abe481dae2086933fc9f270d69a1ffe7506ba4e9b3c1a9ab93630fa6c9224a1d1918d8c6d77c47c4aad56823ffff

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

Processes:

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

Processes:

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

Processes:

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

Nirsoft 6 IoCs

Processes:

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

Processes:

iexplore.exe

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

Processes:

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

Processes:

svchost.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UACDisableNotify = "0" svchost.exe

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

Processes:

iexplore.exe

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

Processes:

svchost.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" svchost.exe
Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid pid_target process target process

3860 2792 WerFault.exe iexplore.exe
4020 2024 WerFault.exe iexplore.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	svchost.exe

pid	pid_target	process	target process
3860	2792	WerFault.exe	iexplore.exe
4020	2024	WerFault.exe	iexplore.exe

Suspicious use of SetThreadContext 9 IoCs

Processes:

svchost.exesvchost.exeiexplore.exe

description	pid	process	target process
PID 776 set thread context of 1356	776	svchost.exe	svchost.exe
PID 1356 set thread context of 2792	1356	svchost.exe	iexplore.exe
PID 1356 set thread context of 1896	1356	svchost.exe	iexplore.exe
PID 1896 set thread context of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 set thread context of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 set thread context of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 set thread context of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 set thread context of 2672	1896	iexplore.exe	iexplore.exe
PID 1896 set thread context of 2264	1896	iexplore.exe	iexplore.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

svchost.exeiexplore.exeiexplore.exe

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

Processes:

iexplore.exeiexplore.exe

description pid process

Token: SeDebugPrivilege 1896 iexplore.exe
Token: SeDebugPrivilege 3060 iexplore.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

svchost.exeiexplore.exe

pid process

1356 svchost.exe
1896 iexplore.exe

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

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

svchost.exesvchost.exeiexplore.exe

description	pid	process	target process
PID 776 wrote to memory of 1356	776	svchost.exe	svchost.exe
PID 776 wrote to memory of 1356	776	svchost.exe	svchost.exe
PID 776 wrote to memory of 1356	776	svchost.exe	svchost.exe
PID 776 wrote to memory of 1356	776	svchost.exe	svchost.exe
PID 776 wrote to memory of 1356	776	svchost.exe	svchost.exe
PID 776 wrote to memory of 1356	776	svchost.exe	svchost.exe
PID 776 wrote to memory of 1356	776	svchost.exe	svchost.exe
PID 1356 wrote to memory of 2792	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 2792	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 2792	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 2792	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 2792	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 2792	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 2792	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 2792	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 1896	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 1896	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 1896	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 1896	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 1896	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 1896	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 1896	1356	svchost.exe	iexplore.exe
PID 1356 wrote to memory of 1896	1356	svchost.exe	iexplore.exe
PID 1896 wrote to memory of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3060	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2024	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 3936	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2320	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2672	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2672	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2672	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2672	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2672	1896	iexplore.exe	iexplore.exe
PID 1896 wrote to memory of 2672	1896	iexplore.exe	iexplore.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

svchost.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" svchost.exe

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 Matrix ATT&CK 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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\untcrfcdu2.txt
MD5
f94dc819ca773f1e3cb27abbc9e7fa27

SHA1
9a7700efadc5ea09ab288544ef1e3cd876255086

SHA256
a3377ade83786c2bdff5db19ff4dbfd796da4312402b5e77c4c63e38cc6eff92

SHA512
72a2c10d7a53a7f9a319dab66d77ed65639e9aa885b551e0055fc7eaf6ef33bbf109205b42ae11555a0f292563914bc6edb63b310c6f9bda9564095f77ab9196

Download Submit
C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\untcrfcdu4.txt
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

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

Filesize
8KB

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

Filesize
5.0MB

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

Filesize
4KB

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

Filesize
4KB

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

Filesize
4KB

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

Filesize
672KB

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

Filesize
360KB

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

Filesize
4KB

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

Filesize
4KB

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

Filesize
176KB

Download
memory/1356-125-0x00000000004010B8-mapping.dmp

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

Filesize
176KB

Download
memory/1896-132-0x0000000000401364-mapping.dmp

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

Filesize
1008KB

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

Filesize
1.3MB

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

Filesize
272KB

Download
memory/2024-144-0x0000000000411654-mapping.dmp

Download
memory/2264-159-0x000000000040C2A8-mapping.dmp

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

Filesize
84KB

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

Filesize
356KB

Download
memory/2320-150-0x0000000000442F04-mapping.dmp

Download
memory/2672-155-0x0000000000413750-mapping.dmp

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

Filesize
88KB

Download
memory/2792-129-0x0000000000401364-mapping.dmp

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

Filesize
152KB

Download
memory/3060-140-0x0000000000423BC0-mapping.dmp

Download
memory/3936-146-0x0000000000411654-mapping.dmp

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

Filesize
108KB

Download