xpertrat | 3fa22ad54a485ad705fe5a71384a7002dedff621edfb81b4c4d71528407c879f

Analysis

max time kernel
17s
max time network
140s
platform
windows7_x64
resource
win7v20201028
submitted
15-03-2021 19:14

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General

Target

BBSEMXMXXX01098210315.exe
Size

222KB
MD5

7c6e6a3972fcd89ba074f78f27402531
SHA1

46cd5b29880a457bd0a829ebb4a808e7d426eae2
SHA256

3fa22ad54a485ad705fe5a71384a7002dedff621edfb81b4c4d71528407c879f
SHA512

c55c275ff4fd4a43cf03dfc2de49da69baa439083e29257cf5447592bde51842a1c7b0877b44821f2f2221aae27473e5c7ee391c1baf452b9cba51f99634deb0

Score

10^/10

xpertrat windows shealth evasion persistence rat trojan upx

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

windows shealth

79.134.225.77:7070

Mutex

C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337

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/1996-7-0x0000000000400000-0x0000000000443000-memory.dmp	xpertrat
behavioral1/memory/1996-8-0x0000000000401364-mapping.dmp	xpertrat

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/552-22-0x0000000000400000-0x000000000041B000-memory.dmp	MailPassView
behavioral1/memory/552-23-0x0000000000411654-mapping.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/616-25-0x0000000000400000-0x0000000000459000-memory.dmp	WebBrowserPassView
behavioral1/memory/616-26-0x0000000000442F04-mapping.dmp	WebBrowserPassView

Nirsoft 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/552-22-0x0000000000400000-0x000000000041B000-memory.dmp	Nirsoft
behavioral1/memory/552-23-0x0000000000411654-mapping.dmp	Nirsoft
behavioral1/memory/616-25-0x0000000000400000-0x0000000000459000-memory.dmp	Nirsoft
behavioral1/memory/616-26-0x0000000000442F04-mapping.dmp	Nirsoft
behavioral1/memory/756-35-0x0000000000400000-0x0000000000415000-memory.dmp	Nirsoft
behavioral1/memory/756-36-0x000000000040C2A8-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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337 = "C:\\Users\\Admin\\AppData\\Roaming\\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337.exe"	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\run	iexplore.exe

UPX packed file 2 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/1080-15-0x0000000000400000-0x0000000000426000-memory.dmp	upx
behavioral1/memory/988-30-0x0000000000400000-0x0000000000416000-memory.dmp	upx

Deletes itself 1 IoCs

Processes:

notepad.exe

pid process

1876 notepad.exe
Loads dropped DLL 1 IoCs

Processes:

BBSEMXMXXX01098210315.exe

pid process

1904 BBSEMXMXXX01098210315.exe
Windows security modification 2 TTPs 1 IoCs
evasion trojan

Disabling Security Tools
T1089

Modify Registry
T1112

Processes:

BBSEMXMXXX01098210315.exe

description ioc process

Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0" BBSEMXMXXX01098210315.exe

pid	process
1876	notepad.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UACDisableNotify = "0"	BBSEMXMXXX01098210315.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\USER\S-1-5-21-3825035466-2522850611-591511364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3825035466-2522850611-591511364-1000\Software\Microsoft\Windows\CurrentVersion\Run\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337 = "C:\\Users\\Admin\\AppData\\Roaming\\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337.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\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337 = "C:\\Users\\Admin\\AppData\\Roaming\\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337.exe"	iexplore.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

BBSEMXMXXX01098210315.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	BBSEMXMXXX01098210315.exe

Suspicious use of SetThreadContext 9 IoCs

Processes:

BBSEMXMXXX01098210315.exeBBSEMXMXXX01098210315.exeiexplore.exe

description	pid	process	target process
PID 1904 set thread context of 1424	1904	BBSEMXMXXX01098210315.exe	BBSEMXMXXX01098210315.exe
PID 1424 set thread context of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1996 set thread context of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 set thread context of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 set thread context of 552	1996	iexplore.exe	iexplore.exe
PID 1996 set thread context of 616	1996	iexplore.exe	iexplore.exe
PID 1996 set thread context of 988	1996	iexplore.exe	iexplore.exe
PID 1996 set thread context of 1708	1996	iexplore.exe	iexplore.exe
PID 1996 set thread context of 756	1996	iexplore.exe	iexplore.exe

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 7 IoCs

Processes:

BBSEMXMXXX01098210315.exeBBSEMXMXXX01098210315.exe

pid	process
1904	BBSEMXMXXX01098210315.exe
1904	BBSEMXMXXX01098210315.exe
1904	BBSEMXMXXX01098210315.exe
1904	BBSEMXMXXX01098210315.exe
1424	BBSEMXMXXX01098210315.exe
1424	BBSEMXMXXX01098210315.exe
1424	BBSEMXMXXX01098210315.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

BBSEMXMXXX01098210315.exe

pid process

1904 BBSEMXMXXX01098210315.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

iexplore.exeiexplore.exe

description pid process

Token: SeDebugPrivilege 1996 iexplore.exe
Token: SeDebugPrivilege 1080 iexplore.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

BBSEMXMXXX01098210315.exeiexplore.exe

pid process

1424 BBSEMXMXXX01098210315.exe
1996 iexplore.exe

description	pid	process
Token: SeDebugPrivilege	1996	iexplore.exe
Token: SeDebugPrivilege	1080	iexplore.exe

pid	process
1424	BBSEMXMXXX01098210315.exe
1996	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

BBSEMXMXXX01098210315.exeBBSEMXMXXX01098210315.exeiexplore.exe

description	pid	process	target process
PID 1904 wrote to memory of 1424	1904	BBSEMXMXXX01098210315.exe	BBSEMXMXXX01098210315.exe
PID 1904 wrote to memory of 1424	1904	BBSEMXMXXX01098210315.exe	BBSEMXMXXX01098210315.exe
PID 1904 wrote to memory of 1424	1904	BBSEMXMXXX01098210315.exe	BBSEMXMXXX01098210315.exe
PID 1904 wrote to memory of 1424	1904	BBSEMXMXXX01098210315.exe	BBSEMXMXXX01098210315.exe
PID 1904 wrote to memory of 1424	1904	BBSEMXMXXX01098210315.exe	BBSEMXMXXX01098210315.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1424 wrote to memory of 1996	1424	BBSEMXMXXX01098210315.exe	iexplore.exe
PID 1996 wrote to memory of 1876	1996	iexplore.exe	notepad.exe
PID 1996 wrote to memory of 1876	1996	iexplore.exe	notepad.exe
PID 1996 wrote to memory of 1876	1996	iexplore.exe	notepad.exe
PID 1996 wrote to memory of 1876	1996	iexplore.exe	notepad.exe
PID 1996 wrote to memory of 1876	1996	iexplore.exe	notepad.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1080	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 1504	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 552	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 616	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 988	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 988	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 988	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 988	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 988	1996	iexplore.exe	iexplore.exe
PID 1996 wrote to memory of 988	1996	iexplore.exe	iexplore.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

Processes:

BBSEMXMXXX01098210315.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	BBSEMXMXXX01098210315.exe

C:\Users\Admin\AppData\Local\Temp\BBSEMXMXXX01098210315.exe
"C:\Users\Admin\AppData\Local\Temp\BBSEMXMXXX01098210315.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1904

C:\Users\Admin\AppData\Local\Temp\BBSEMXMXXX01098210315.exe
"C:\Users\Admin\AppData\Local\Temp\BBSEMXMXXX01098210315.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:1424

C:\Program Files (x86)\Internet Explorer\iexplore.exe
C:\Users\Admin\AppData\Local\Temp\BBSEMXMXXX01098210315.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:1996

C:\Windows\SysWOW64\notepad.exe
notepad.exe
4⤵
- Deletes itself
PID:1876

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen0.txt"
4⤵
- Suspicious use of AdjustPrivilegeToken
PID:1080

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen1.txt"
4⤵
PID:1504

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen1.txt"
4⤵
PID:552

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen2.txt"
4⤵
PID:616

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen3.txt"
4⤵
PID:988

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen4.txt"
4⤵
PID:1708

C:\Program Files (x86)\Internet Explorer\iexplore.exe
/stext "C:\Users\Admin\AppData\Roaming\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen4.txt"
4⤵
PID:756

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\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen2.txt
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
C:\Users\Admin\AppData\Roaming\C2H6Y3K1-A7X5-B5F3-N3W1-K4A558N0M337\mvulpvfen4.txt
MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nsh169.tmp\gyd3q1zqsxk3.dll
MD5
f793e0e7221f0bece3146b5e4612c0f8

SHA1
41709207d0a572d986df045a73d2e24326769a8c

SHA256
b3eb439e91e45fcb7dab2785b2d5a08d1c0c035af46c0f73ec3a09d34a069145

SHA512
39d323eb46aa5bccce84b921171448269207d5d6ea821397de7465fb2ee1d94fe7f3dc5d06e175a25f4a7a3ec02cebd5e4636e2392f8791cb8878a7e0e5745c3

Download Submit
memory/552-22-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/552-23-0x0000000000411654-mapping.dmp

Download
memory/616-26-0x0000000000442F04-mapping.dmp

Download
memory/616-25-0x0000000000400000-0x0000000000459000-memory.dmp

Filesize
356KB

Download
memory/756-36-0x000000000040C2A8-mapping.dmp

Download
memory/756-35-0x0000000000400000-0x0000000000415000-memory.dmp

Filesize
84KB

Download
memory/848-28-0x000007FEF63D0000-0x000007FEF664A000-memory.dmp

Filesize
2.5MB

Download
memory/988-30-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/988-31-0x0000000000413750-mapping.dmp

Download
memory/1080-16-0x0000000000423BC0-mapping.dmp

Download
memory/1080-15-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1424-11-0x0000000000400000-0x000000000042C000-memory.dmp

Filesize
176KB

Download
memory/1424-21-0x0000000002920000-0x0000000002924000-memory.dmp

Filesize
16KB

Download
memory/1424-20-0x0000000000240000-0x0000000000244000-memory.dmp

Filesize
16KB

Download
memory/1424-4-0x00000000004010B8-mapping.dmp

Download
memory/1504-19-0x0000000000411654-mapping.dmp

Download
memory/1708-34-0x000000000040C2A8-mapping.dmp

Download
memory/1876-12-0x0000000000000000-mapping.dmp

Download
memory/1904-2-0x00000000766F1000-0x00000000766F3000-memory.dmp

Filesize
8KB

Download
memory/1996-8-0x0000000000401364-mapping.dmp

Download
memory/1996-7-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download