taurus | 3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4

General

Target

3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe
Size

787KB
MD5

73485f0a753288ff5f7b4a62ecbf051d
SHA1

cf9e21945490fb9a64d5414d0683da0b770059b0
SHA256

3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4
SHA512

ecd43dd38927343c458f10ef5fa560560f73f59faf7fcf0708ea8422c1551539a3aa781342f24bdeb83fb47b9c13e06eb7e1e546a845783ec3b7a16bd97ecf70

Score

10^/10

taurus discovery evasion spyware stealer trojan

Malware Config

Signatures

Taurus Stealer
Taurus is an infostealer first seen in June 2020.
trojan stealer taurus

Taurus Stealer Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1768-56-0x0000000001170000-0x000000000132B000-memory.dmp	family_taurus_stealer

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe

Deletes itself 1 IoCs

pid	Process
108	cmd.exe

Identifies Wine through registry keys 2 TTPs 1 IoCs

Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

evasion

Query Registry

T1012

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Wine	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe

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
Accesses 2FA software files, possible credential harvesting 2 TTPs
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1768	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1972	timeout.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1768	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1768 wrote to memory of 108	1768	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe	30
PID 1768 wrote to memory of 108	1768	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe	30
PID 1768 wrote to memory of 108	1768	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe	30
PID 1768 wrote to memory of 108	1768	3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe	30
PID 108 wrote to memory of 1972	108	cmd.exe	31
PID 108 wrote to memory of 1972	108	cmd.exe	31
PID 108 wrote to memory of 1972	108	cmd.exe	31
PID 108 wrote to memory of 1972	108	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe
"C:\Users\Admin\AppData\Local\Temp\3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe"
1⤵
- Checks BIOS information in registry
- Identifies Wine through registry keys
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Windows\SysWOW64\cmd.exe
  /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\Temp\3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:108
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 3
    3⤵
    - Delays execution with timeout.exe
    PID:1972

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

Modify Registry

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

4

T1012

System Information Discovery

1

T1082

Virtualization/Sandbox Evasion

2

T1497

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/1768-54-0x00000000776A0000-0x0000000077820000-memory.dmp

Filesize
1.5MB

Download
memory/1768-55-0x0000000076171000-0x0000000076173000-memory.dmp

Filesize
8KB

Download
memory/1768-56-0x0000000001170000-0x000000000132B000-memory.dmp

Filesize
1.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads