xpertrat | 21d8f3869dae855f7ddb202eca9bc170074ab405c7741cbd4ffb48960494234f

Analysis

max time kernel
134s
max time network
137s
platform
windows7_x64
resource
win7v20210410
submitted
15-04-2021 17:52

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General

Target

gunzipped.exe
Size

1.5MB
MD5

bde5cc055efbc8779784a94811e3e5a5
SHA1

629afe08ffe9d3660e7fd3918122af70fa49a5fd
SHA256

21d8f3869dae855f7ddb202eca9bc170074ab405c7741cbd4ffb48960494234f
SHA512

bc5dc3ed61fa9d00866219395a8ef6cb64ef8b7ee2ad20034b5840d5a7d92816bac22f61175eed75ee039a929eb7184a90c3ee480346249a508768c9f6cf15ff

Score

10^/10

xpertrat sales evasion persistence rat spyware stealer trojan upx

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

sales

79.134.225.117:5935

Mutex

V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1

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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/576-71-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat
behavioral1/memory/576-72-0x0000000000401364-mapping.dmp	xpertrat
behavioral1/memory/576-76-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/928-82-0x0000000000411654-mapping.dmp	MailPassView
behavioral1/memory/928-81-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/928-84-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/1876-85-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView
behavioral1/memory/1876-86-0x0000000000442F04-mapping.dmp	WebBrowserPassView
behavioral1/memory/1876-98-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView

Nirsoft 9 IoCs

Processes:

resource	yara_rule
behavioral1/memory/928-82-0x0000000000411654-mapping.dmp	Nirsoft
behavioral1/memory/928-81-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/928-84-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/1876-85-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral1/memory/1876-86-0x0000000000442F04-mapping.dmp	Nirsoft
behavioral1/memory/1360-94-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft
behavioral1/memory/1360-95-0x000000000040C2A8-mapping.dmp	Nirsoft
behavioral1/memory/1876-98-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral1/memory/1360-100-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

gunzipped.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1 = "C:\\Users\\Admin\\AppData\\Roaming\\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1.exe"	gunzipped.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	gunzipped.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1328-77-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/1328-80-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/1644-91-0x0000000000400000-0x0000000000416000-memory.dmp	upx
behavioral1/memory/1644-99-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Windows security modification 2 TTPs 1 IoCs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112

Processes:

gunzipped.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0" gunzipped.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	gunzipped.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

gunzipped.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	gunzipped.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2513283230-931923277-594887482-1000\Software\Microsoft\Windows\CurrentVersion\Run\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1 = "C:\\Users\\Admin\\AppData\\Roaming\\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1.exe"	gunzipped.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run	gunzipped.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1 = "C:\\Users\\Admin\\AppData\\Roaming\\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1.exe"	gunzipped.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

gunzipped.exe

description ioc process

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

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

Suspicious use of SetThreadContext 8 IoCs

Processes:

gunzipped.exegunzipped.exegunzipped.exe

description	pid	process	target process
PID 1676 set thread context of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1664 set thread context of 576	1664	gunzipped.exe	gunzipped.exe
PID 576 set thread context of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 set thread context of 928	576	gunzipped.exe	gunzipped.exe
PID 576 set thread context of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 set thread context of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 set thread context of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 set thread context of 1360	576	gunzipped.exe	gunzipped.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

gunzipped.exegunzipped.exe

pid process

1676 gunzipped.exe
1676 gunzipped.exe
1664 gunzipped.exe
1664 gunzipped.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

gunzipped.exegunzipped.exegunzipped.exe

description pid process

Token: SeDebugPrivilege 1676 gunzipped.exe
Token: SeDebugPrivilege 576 gunzipped.exe
Token: SeDebugPrivilege 1328 gunzipped.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

gunzipped.exegunzipped.exe

pid process

1664 gunzipped.exe
576 gunzipped.exe

pid	process
1676	gunzipped.exe
1676	gunzipped.exe
1664	gunzipped.exe
1664	gunzipped.exe

description	pid	process
Token: SeDebugPrivilege	1676	gunzipped.exe
Token: SeDebugPrivilege	576	gunzipped.exe
Token: SeDebugPrivilege	1328	gunzipped.exe

pid	process
1664	gunzipped.exe
576	gunzipped.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

gunzipped.exegunzipped.exegunzipped.exe

description	pid	process	target process
PID 1676 wrote to memory of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1676 wrote to memory of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1676 wrote to memory of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1676 wrote to memory of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1676 wrote to memory of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1676 wrote to memory of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1676 wrote to memory of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1676 wrote to memory of 1664	1676	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 1664 wrote to memory of 576	1664	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1328	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 928	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1876	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1600	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe
PID 576 wrote to memory of 1644	576	gunzipped.exe	gunzipped.exe

System policy modification 1 TTPs 1 IoCs
evasion

Modify Registry
T1112

Processes:

gunzipped.exe

description ioc process

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

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

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
"C:\Users\Admin\AppData\Local\Temp\gunzipped.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1676

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
"C:\Users\Admin\AppData\Local\Temp\gunzipped.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:1664

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
C:\Users\Admin\AppData\Local\Temp\gunzipped.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:576

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
/stext "C:\Users\Admin\AppData\Roaming\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\cywcyqclc0.txt"
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1328

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
/stext "C:\Users\Admin\AppData\Roaming\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\cywcyqclc1.txt"
4⤵
PID:928

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
/stext "C:\Users\Admin\AppData\Roaming\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\cywcyqclc2.txt"
4⤵
PID:1876

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
/stext "C:\Users\Admin\AppData\Roaming\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\cywcyqclc3.txt"
4⤵
PID:1600

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
/stext "C:\Users\Admin\AppData\Roaming\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\cywcyqclc3.txt"
4⤵
PID:1644

C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
/stext "C:\Users\Admin\AppData\Roaming\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\cywcyqclc4.txt"
4⤵
PID:1360

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

Credentials in Files

T1081

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\cywcyqclc2.txt
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\V8V5U6A3-F774-P2N8-M6H6-L4M443J6G7A1\cywcyqclc4.txt
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
memory/576-71-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/576-76-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/576-75-0x0000000075971000-0x0000000075973000-memory.dmp

Filesize
8KB

Download
memory/576-72-0x0000000000401364-mapping.dmp

Download
memory/928-82-0x0000000000411654-mapping.dmp

Download
memory/928-84-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/928-81-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1328-77-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1328-78-0x0000000000423BC0-mapping.dmp

Download
memory/1328-80-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1360-100-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1360-95-0x000000000040C2A8-mapping.dmp

Download
memory/1360-94-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/1600-90-0x0000000000413750-mapping.dmp

Download
memory/1644-91-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1644-92-0x0000000000413750-mapping.dmp

Download
memory/1644-99-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1664-66-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1664-67-0x00000000004010B8-mapping.dmp

Download
memory/1676-63-0x0000000002130000-0x0000000002131000-memory.dmp

Filesize
4KB

Download
memory/1676-60-0x0000000000A60000-0x0000000000A61000-memory.dmp

Filesize
4KB

Download
memory/1676-64-0x0000000007330000-0x00000000073B2000-memory.dmp

Filesize
520KB

Download
memory/1676-65-0x0000000004210000-0x000000000424E000-memory.dmp

Filesize
248KB

Download
memory/1676-62-0x0000000000A50000-0x0000000000A56000-memory.dmp

Filesize
24KB

Download
memory/1876-85-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/1876-86-0x0000000000442F04-mapping.dmp

Download
memory/1876-98-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download