Malware Analysis Report

2024-07-28 12:19

Sample ID 240702-a4zr2azeqa
Target 94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f
SHA256 94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f
Tags
tinba banker persistence trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f

Threat Level: Known bad

The file 94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f was found to be: Known bad.

Malicious Activity Summary

tinba banker persistence trojan

Tinba / TinyBanker

Adds Run key to start application

Program crash

Enumerates physical storage devices

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of UnmapMainImage

Suspicious behavior: EnumeratesProcesses

Modifies data under HKEY_USERS

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-07-02 00:46

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-02 00:46

Reported

2024-07-02 00:49

Platform

win10v2004-20240611-en

Max time kernel

146s

Max time network

123s

Command Line

C:\Windows\Explorer.EXE

Signatures

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\winver.exe
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\2a\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\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe N/A

Suspicious use of UnmapMainImage

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4544 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 4544 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 4544 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 4544 wrote to memory of 4672 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 4672 wrote to memory of 3456 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\Explorer.EXE
PID 4544 wrote to memory of 3456 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\Explorer.EXE

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe

"C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.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 364 -p 4672 -ip 4672

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4672 -s 300

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4544 -ip 4544

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4544 -s 768

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 31.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

memory/4544-1-0x0000000004780000-0x0000000004DD8000-memory.dmp

memory/4544-2-0x0000000002560000-0x0000000002561000-memory.dmp

memory/3456-4-0x0000000001F20000-0x0000000001F26000-memory.dmp

memory/3456-5-0x0000000001F20000-0x0000000001F26000-memory.dmp

memory/4544-6-0x0000000000400000-0x000000000043C000-memory.dmp

memory/3456-9-0x00000000024F0000-0x00000000024F6000-memory.dmp

memory/4544-12-0x0000000004780000-0x0000000004DD8000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-02 00:46

Reported

2024-07-02 00:49

Platform

win7-20240611-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-1-5-21-2812790648-3157963462-487717889-1000\Software\Microsoft\Windows\CurrentVersion\Run\6BC2CA44 = "C:\\Users\\Admin\\AppData\\Roaming\\6BC2CA44\\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
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 2164 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 2164 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 2164 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 2164 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 2164 wrote to memory of 2780 N/A C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe C:\Windows\SysWOW64\winver.exe
PID 2780 wrote to memory of 1336 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\Explorer.EXE
PID 2780 wrote to memory of 1220 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\system32\taskhost.exe
PID 2780 wrote to memory of 1288 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\system32\Dwm.exe
PID 2780 wrote to memory of 1336 N/A C:\Windows\SysWOW64\winver.exe C:\Windows\Explorer.EXE
PID 2780 wrote to memory of 2164 N/A C:\Windows\SysWOW64\winver.exe C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.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:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.exe

"C:\Users\Admin\AppData\Local\Temp\94c81420672fed3a2386621a79b660a72b0ccb72de6a8301beeb5e8260a1db0f.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/1336-6-0x0000000002570000-0x0000000002576000-memory.dmp

memory/2780-4-0x00000000001A0000-0x00000000001A6000-memory.dmp

memory/1336-3-0x0000000002570000-0x0000000002576000-memory.dmp

memory/1336-1-0x0000000002570000-0x0000000002576000-memory.dmp

memory/1336-15-0x00000000025D0000-0x00000000025D6000-memory.dmp

memory/2780-20-0x0000000000210000-0x0000000000216000-memory.dmp

memory/1288-12-0x0000000000130000-0x0000000000136000-memory.dmp

memory/1220-9-0x0000000000310000-0x0000000000316000-memory.dmp

memory/2164-22-0x0000000000400000-0x000000000043C000-memory.dmp

memory/1288-25-0x0000000000130000-0x0000000000136000-memory.dmp

memory/1336-24-0x00000000025D0000-0x00000000025D6000-memory.dmp

memory/1220-23-0x0000000000310000-0x0000000000316000-memory.dmp

memory/2780-27-0x0000000000210000-0x0000000000216000-memory.dmp