Malware Analysis Report

2024-10-19 02:35

Sample ID 220302-gr5k3sdda8
Target 83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b
SHA256 83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b
Tags
taurus discovery spyware stealer trojan upx
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b

Threat Level: Known bad

The file 83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b was found to be: Known bad.

Malicious Activity Summary

taurus discovery spyware stealer trojan upx

Suspicious use of NtCreateProcessExOtherParentProcess

Taurus Stealer Payload

Taurus Stealer

Executes dropped EXE

UPX packed file

Reads user/profile data of web browsers

Loads dropped DLL

Deletes itself

Checks installed software on the system

Accesses 2FA software files, possible credential harvesting

Program crash

Delays execution with timeout.exe

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Enumerates system info in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-03-02 06:03

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-03-02 06:03

Reported

2022-03-02 06:05

Platform

win7-en-20211208

Max time kernel

117s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe"

Signatures

Taurus Stealer

trojan stealer taurus

Taurus Stealer Payload

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

UPX packed file

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

Deletes itself

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

Reads user/profile data of web browsers

spyware stealer

Accesses 2FA software files, possible credential harvesting

spyware stealer

Checks installed software on the system

discovery

Delays execution with timeout.exe

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 880 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe
PID 880 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe
PID 880 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe
PID 880 wrote to memory of 1532 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe
PID 880 wrote to memory of 1280 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Windows\SysWOW64\cmd.exe
PID 880 wrote to memory of 1280 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Windows\SysWOW64\cmd.exe
PID 880 wrote to memory of 1280 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Windows\SysWOW64\cmd.exe
PID 880 wrote to memory of 1280 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Windows\SysWOW64\cmd.exe
PID 1280 wrote to memory of 1736 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1280 wrote to memory of 1736 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1280 wrote to memory of 1736 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1280 wrote to memory of 1736 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe

"C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe"

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

C:\Windows\SysWOW64\cmd.exe

/c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe

C:\Windows\SysWOW64\timeout.exe

timeout /t 3

Network

Country Destination Domain Proto
US 8.8.8.8:53 xreakmnpmc.xyz udp

Files

\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

MD5 a767f197a9dab7a2caa273ffaeac4c3a
SHA1 2fa39063a7431d2bfd9e5ea65cf9ab6a3b4fdb23
SHA256 a5d19b118cf998fb745d2f1f3cbe1bdef208ddd15aee2342de2d18c9c903dded
SHA512 d5847f1202037bb98c983412117ae435ab1fdab0b96d4c1eb0be58e6e2c530a2b6d5f44736cd51a169486706d0bfe6ead0c1bcce7cec2ee8582436e70c367ced

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

MD5 a767f197a9dab7a2caa273ffaeac4c3a
SHA1 2fa39063a7431d2bfd9e5ea65cf9ab6a3b4fdb23
SHA256 a5d19b118cf998fb745d2f1f3cbe1bdef208ddd15aee2342de2d18c9c903dded
SHA512 d5847f1202037bb98c983412117ae435ab1fdab0b96d4c1eb0be58e6e2c530a2b6d5f44736cd51a169486706d0bfe6ead0c1bcce7cec2ee8582436e70c367ced

\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

MD5 a767f197a9dab7a2caa273ffaeac4c3a
SHA1 2fa39063a7431d2bfd9e5ea65cf9ab6a3b4fdb23
SHA256 a5d19b118cf998fb745d2f1f3cbe1bdef208ddd15aee2342de2d18c9c903dded
SHA512 d5847f1202037bb98c983412117ae435ab1fdab0b96d4c1eb0be58e6e2c530a2b6d5f44736cd51a169486706d0bfe6ead0c1bcce7cec2ee8582436e70c367ced

memory/880-58-0x0000000003180000-0x00000000031A2000-memory.dmp

memory/880-59-0x0000000003180000-0x00000000031A2000-memory.dmp

memory/880-60-0x0000000000250000-0x0000000000286000-memory.dmp

memory/880-61-0x0000000000400000-0x0000000000437000-memory.dmp

memory/880-62-0x0000000075B11000-0x0000000075B13000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2022-03-02 06:03

Reported

2022-03-02 06:06

Platform

win10v2004-en-20220112

Max time kernel

111s

Max time network

161s

Command Line

"C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe"

Signatures

Suspicious use of NtCreateProcessExOtherParentProcess

Description Indicator Process Target
PID 3764 created 3216 N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe

Taurus Stealer

trojan stealer taurus

Taurus Stealer Payload

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

UPX packed file

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

Reads user/profile data of web browsers

spyware stealer

Accesses 2FA software files, possible credential harvesting

spyware stealer

Checks installed software on the system

discovery

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 C:\Windows\SysWOW64\WerFault.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\SysWOW64\WerFault.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Windows\SysWOW64\WerFault.exe N/A

Delays execution with timeout.exe

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

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS C:\Windows\SysWOW64\WerFault.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU C:\Windows\SysWOW64\WerFault.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3216 wrote to memory of 1344 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe
PID 3216 wrote to memory of 1344 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe
PID 3216 wrote to memory of 1344 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe
PID 3216 wrote to memory of 1620 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Windows\SysWOW64\cmd.exe
PID 3216 wrote to memory of 1620 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Windows\SysWOW64\cmd.exe
PID 3216 wrote to memory of 1620 N/A C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe C:\Windows\SysWOW64\cmd.exe
PID 1620 wrote to memory of 4036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1620 wrote to memory of 4036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 1620 wrote to memory of 4036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 3764 wrote to memory of 3216 N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe
PID 3764 wrote to memory of 3216 N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe

Processes

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe

"C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe"

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

C:\Windows\SysWOW64\cmd.exe

/c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0b.exe

C:\Windows\SysWOW64\timeout.exe

timeout /t 3

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 3216 -ip 3216

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3216 -s 1336

Network

Country Destination Domain Proto
US 8.8.8.8:53 xreakmnpmc.xyz udp
US 13.107.4.50:80 tcp
US 13.107.4.50:80 tcp
US 8.8.8.8:53 xreakmnpmc.xyz udp
US 8.8.8.8:53 geo.prod.do.dsp.mp.microsoft.com udp
US 52.184.213.187:443 geo.prod.do.dsp.mp.microsoft.com tcp
US 8.8.8.8:53 kv801.prod.do.dsp.mp.microsoft.com udp
NL 184.29.205.60:443 kv801.prod.do.dsp.mp.microsoft.com tcp
US 8.8.8.8:53 cp801.prod.do.dsp.mp.microsoft.com udp
NL 184.29.205.60:443 cp801.prod.do.dsp.mp.microsoft.com tcp
NL 184.29.205.60:443 cp801.prod.do.dsp.mp.microsoft.com tcp

Files

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

MD5 a767f197a9dab7a2caa273ffaeac4c3a
SHA1 2fa39063a7431d2bfd9e5ea65cf9ab6a3b4fdb23
SHA256 a5d19b118cf998fb745d2f1f3cbe1bdef208ddd15aee2342de2d18c9c903dded
SHA512 d5847f1202037bb98c983412117ae435ab1fdab0b96d4c1eb0be58e6e2c530a2b6d5f44736cd51a169486706d0bfe6ead0c1bcce7cec2ee8582436e70c367ced

C:\Users\Admin\AppData\Local\Temp\83d364c969b64ac72b8f8eb1e66d60c6915d10d385190d29ba6df82c67167f0bmgr.exe

MD5 a767f197a9dab7a2caa273ffaeac4c3a
SHA1 2fa39063a7431d2bfd9e5ea65cf9ab6a3b4fdb23
SHA256 a5d19b118cf998fb745d2f1f3cbe1bdef208ddd15aee2342de2d18c9c903dded
SHA512 d5847f1202037bb98c983412117ae435ab1fdab0b96d4c1eb0be58e6e2c530a2b6d5f44736cd51a169486706d0bfe6ead0c1bcce7cec2ee8582436e70c367ced

memory/3216-132-0x00000000033BC000-0x00000000033DD000-memory.dmp

memory/3216-133-0x00000000033BC000-0x00000000033DD000-memory.dmp

memory/3216-134-0x00000000032D0000-0x0000000003306000-memory.dmp

memory/3216-135-0x0000000000400000-0x0000000000437000-memory.dmp