Malware Analysis Report

2024-09-09 17:08

Sample ID 240708-besg4axclh
Target 8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5
SHA256 8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5
Tags
tinba banker persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5

Threat Level: Known bad

The file 8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5 was found to be: Known bad.

Malicious Activity Summary

tinba banker persistence trojan

Tinba / TinyBanker

Adds Run key to start application

Enumerates physical storage devices

Program crash

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of FindShellTrayWindow

Suspicious use of AdjustPrivilegeToken

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

Modifies data under HKEY_USERS

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-07-08 01:03

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-08 01:03

Reported

2024-07-08 01:15

Platform

win7-20240705-en

Max time kernel

148s

Max time network

149s

Command Line

"taskhost.exe"

Signatures

Tinba / TinyBanker

trojan banker tinba

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\12107720 = "C:\\Users\\Admin\\AppData\\Roaming\\12107720\\bin.exe" C:\Windows\SysWOW64\winver.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Windows\SysWOW64\winver.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\winver.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2352 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe C:\Windows\SysWOW64\winver.exe
PID 2352 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe C:\Windows\SysWOW64\winver.exe
PID 2352 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe C:\Windows\SysWOW64\winver.exe
PID 2352 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe C:\Windows\SysWOW64\winver.exe
PID 2352 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe C:\Windows\SysWOW64\winver.exe
PID 2888 wrote to memory of 1176 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\Explorer.EXE
PID 2888 wrote to memory of 1080 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\system32\taskhost.exe
PID 2888 wrote to memory of 1152 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\system32\Dwm.exe
PID 2888 wrote to memory of 1176 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\Explorer.EXE
PID 2888 wrote to memory of 1692 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\system32\DllHost.exe
PID 2888 wrote to memory of 2352 N/A C:\Windows\SysWOW64\winver.exe C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe

Processes

C:\Windows\system32\taskhost.exe

"taskhost.exe"

C:\Windows\system32\Dwm.exe

"C:\Windows\system32\Dwm.exe"

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Windows\system32\DllHost.exe

C:\Windows\system32\DllHost.exe /Processid:{3EB3C877-1F16-487C-9050-104DBCD66683}

C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe

"C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe"

C:\Windows\SysWOW64\winver.exe

winver

Network

Country Destination Domain Proto
US 8.8.8.8:53 elitiorecfreetoo.cc udp
US 216.218.185.162:80 elitiorecfreetoo.cc tcp

Files

memory/1176-3-0x0000000002A50000-0x0000000002A56000-memory.dmp

memory/1176-6-0x0000000002A50000-0x0000000002A56000-memory.dmp

memory/1176-1-0x0000000002A50000-0x0000000002A56000-memory.dmp

memory/2888-5-0x0000000000120000-0x0000000000126000-memory.dmp

memory/1176-17-0x0000000002AA0000-0x0000000002AA6000-memory.dmp

memory/1152-14-0x00000000001B0000-0x00000000001B6000-memory.dmp

memory/2888-25-0x0000000000210000-0x0000000000216000-memory.dmp

memory/1692-20-0x0000000002200000-0x0000000002206000-memory.dmp

memory/2352-8-0x0000000000400000-0x000000000043C000-memory.dmp

memory/1080-11-0x0000000000140000-0x0000000000146000-memory.dmp

memory/1152-26-0x00000000001B0000-0x00000000001B6000-memory.dmp

memory/1080-28-0x0000000000140000-0x0000000000146000-memory.dmp

memory/1176-27-0x0000000002AA0000-0x0000000002AA6000-memory.dmp

memory/1692-29-0x0000000002200000-0x0000000002206000-memory.dmp

memory/2888-31-0x0000000000210000-0x0000000000216000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-08 01:03

Reported

2024-07-08 01:19

Platform

win10v2004-20240704-en

Max time kernel

128s

Max time network

145s

Command Line

C:\Windows\Explorer.EXE

Signatures

Enumerates physical storage devices

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\26\52C64B7E\@%SystemRoot%\system32\hnetcfgclient.dll,-201 = "HNetCfg Client" C:\Windows\System32\svchost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A C:\Windows\Explorer.EXE N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\Explorer.EXE N/A
Token: SeShutdownPrivilege N/A C:\Windows\Explorer.EXE N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\Explorer.EXE N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\winver.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Windows\Explorer.EXE N/A

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe

"C:\Users\Admin\AppData\Local\Temp\8d8a373d5df45d92ed5a8d259b0a9c3617ee62ef0f5bd7e2d2931113617978b5.exe"

C:\Windows\System32\svchost.exe

C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s Netman

C:\Windows\SysWOW64\winver.exe

winver

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2276 -ip 2276

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2276 -s 300

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1844 -ip 1844

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1844 -s 772

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

memory/1844-1-0x00000000045C0000-0x0000000004C18000-memory.dmp

memory/1844-2-0x0000000002530000-0x0000000002531000-memory.dmp

memory/3384-4-0x0000000001010000-0x0000000001016000-memory.dmp

memory/3384-5-0x0000000001010000-0x0000000001016000-memory.dmp

memory/1844-6-0x0000000000400000-0x000000000043C000-memory.dmp

memory/3384-9-0x00000000029C0000-0x00000000029C6000-memory.dmp

memory/1844-12-0x00000000045C0000-0x0000000004C18000-memory.dmp