xpertrat | 6b22261ef9a97fde0923ffe05c7aa8317fd3b0e27c10fbc967f9961a5f39c105

Analysis

max time kernel
49s
max time network
165s
platform
windows7_x64
resource
win7v20210410
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
behavioral1/memory/1124-73-0x0000000000400000-0x0000000000444000-memory.dmp	xpertrat
behavioral1/memory/1124-74-0x0000000000401364-mapping.dmp	xpertrat

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/992-82-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/992-83-0x0000000000411654-mapping.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/1336-86-0x0000000000442F04-mapping.dmp	WebBrowserPassView
behavioral1/memory/1336-85-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView

Nirsoft 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/992-82-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/992-83-0x0000000000411654-mapping.dmp	Nirsoft
behavioral1/memory/1336-86-0x0000000000442F04-mapping.dmp	Nirsoft
behavioral1/memory/1336-85-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral1/memory/1188-92-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft
behavioral1/memory/1188-93-0x000000000040C2A8-mapping.dmp	Nirsoft

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

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
behavioral1/memory/2040-79-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/936-89-0x0000000000400000-0x0000000000416000-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-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\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

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

Suspicious use of SetThreadContext 8 IoCs

Processes:

svchost.exesvchost.exeiexplore.exe

description	pid	process	target process
PID 1208 set thread context of 968	1208	svchost.exe	svchost.exe
PID 968 set thread context of 1120	968	svchost.exe	iexplore.exe
PID 968 set thread context of 1124	968	svchost.exe	iexplore.exe
PID 1124 set thread context of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 set thread context of 992	1124	iexplore.exe	iexplore.exe
PID 1124 set thread context of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 set thread context of 936	1124	iexplore.exe	iexplore.exe
PID 1124 set thread context of 1188	1124	iexplore.exe	iexplore.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

svchost.exe

pid process

968 svchost.exe
968 svchost.exe
968 svchost.exe
968 svchost.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

iexplore.exeiexplore.exe

description pid process

Token: SeDebugPrivilege 1124 iexplore.exe
Token: SeDebugPrivilege 2040 iexplore.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

svchost.exeiexplore.exe

pid process

968 svchost.exe
1124 iexplore.exe

pid	process
968	svchost.exe
968	svchost.exe
968	svchost.exe
968	svchost.exe

description	pid	process
Token: SeDebugPrivilege	1124	iexplore.exe
Token: SeDebugPrivilege	2040	iexplore.exe

pid	process
968	svchost.exe
1124	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

svchost.exesvchost.exeiexplore.exe

description	pid	process	target process
PID 1208 wrote to memory of 968	1208	svchost.exe	svchost.exe
PID 1208 wrote to memory of 968	1208	svchost.exe	svchost.exe
PID 1208 wrote to memory of 968	1208	svchost.exe	svchost.exe
PID 1208 wrote to memory of 968	1208	svchost.exe	svchost.exe
PID 1208 wrote to memory of 968	1208	svchost.exe	svchost.exe
PID 1208 wrote to memory of 968	1208	svchost.exe	svchost.exe
PID 1208 wrote to memory of 968	1208	svchost.exe	svchost.exe
PID 1208 wrote to memory of 968	1208	svchost.exe	svchost.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1120	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 968 wrote to memory of 1124	968	svchost.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 2040	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 992	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 1336	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	iexplore.exe	iexplore.exe
PID 1124 wrote to memory of 936	1124	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:1208

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:968

C:\Program Files (x86)\Internet Explorer\iexplore.exe
C:\Users\Admin\AppData\Local\Temp\svchost.exe
3⤵
PID:1120

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:1124

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\rfwilsjkv0.txt"
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2040

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\rfwilsjkv1.txt"
4⤵
PID:992

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\rfwilsjkv2.txt"
4⤵
PID:1336

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\rfwilsjkv3.txt"
4⤵
PID:936

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\rfwilsjkv4.txt"
4⤵
PID:1188

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\rfwilsjkv2.txt
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\R4W8O5A3-P0G7-Q7U5-H114-L7S6L4U0I6I6\rfwilsjkv4.txt
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/936-90-0x0000000000413750-mapping.dmp

Download
memory/936-89-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/968-67-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/968-68-0x00000000004010B8-mapping.dmp

Download
memory/992-82-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/992-83-0x0000000000411654-mapping.dmp

Download
memory/1120-72-0x0000000000401364-mapping.dmp

Download
memory/1124-73-0x0000000000400000-0x0000000000444000-memory.dmp

Filesize
272KB

Download
memory/1124-74-0x0000000000401364-mapping.dmp

Download
memory/1124-75-0x00000000004C0000-0x0000000000613000-memory.dmp

Filesize
1.3MB

Download
memory/1188-93-0x000000000040C2A8-mapping.dmp

Download
memory/1188-92-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1208-62-0x0000000076281000-0x0000000076283000-memory.dmp

Filesize
8KB

Download
memory/1208-63-0x0000000000F60000-0x0000000000F61000-memory.dmp

Filesize
4KB

Download
memory/1208-60-0x00000000010F0000-0x00000000010F1000-memory.dmp

Filesize
4KB

Download
memory/1208-66-0x0000000000A70000-0x0000000000ACA000-memory.dmp

Filesize
360KB

Download
memory/1208-65-0x0000000007EB0000-0x0000000007F58000-memory.dmp

Filesize
672KB

Download
memory/1208-64-0x00000000004A0000-0x00000000004A2000-memory.dmp

Filesize
8KB

Download
memory/1336-85-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1336-86-0x0000000000442F04-mapping.dmp

Download
memory/2040-80-0x0000000000423BC0-mapping.dmp

Download
memory/2040-79-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download