taurus | bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618

General

Target

bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe
Size

1.7MB
MD5

a4626ce09b592d661c3a053cffbbbbbf
SHA1

9210bac9eccce0b73afbeec21bce029fa873d024
SHA256

bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618
SHA512

99a0844367530a9be796c99d86fbf234dec9390b0c580b5303fd8cc9c0fd02ce7661a4f111c2652d3b3b26e6a1354bb6ef78119960066e27cc311d932975ced0
SSDEEP

49152:wLMHj1x0js2+7Z285wh2BOi3LaKLWaejEA:wAHjH0FKZ22wEwi3LPaa

Score

10^/10

taurus discovery evasion spyware stealer themida trojan

Malware Config

Signatures

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

Taurus Stealer payload 8 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1724-55-0x00000000008A0000-0x0000000000CA5000-memory.dmp	family_taurus_stealer
behavioral1/memory/1724-56-0x00000000008A0000-0x0000000000CA5000-memory.dmp	family_taurus_stealer
behavioral1/memory/1724-57-0x00000000008A0000-0x0000000000CA5000-memory.dmp	family_taurus_stealer
behavioral1/memory/1724-58-0x00000000008A0000-0x0000000000CA5000-memory.dmp	family_taurus_stealer
behavioral1/memory/1724-59-0x00000000008A0000-0x0000000000CA5000-memory.dmp	family_taurus_stealer
behavioral1/memory/1724-60-0x0000000076E90000-0x0000000077010000-memory.dmp	family_taurus_stealer
behavioral1/memory/1724-61-0x00000000008A0000-0x0000000000CA5000-memory.dmp	family_taurus_stealer
behavioral1/memory/1724-64-0x00000000008A0000-0x0000000000CA5000-memory.dmp	family_taurus_stealer

Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

description ioc process

Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

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

Processes:

bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1076 cmd.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

pid	process
1076	cmd.exe

Themida packer 8 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
behavioral1/memory/1724-55-0x00000000008A0000-0x0000000000CA5000-memory.dmp	themida
behavioral1/memory/1724-56-0x00000000008A0000-0x0000000000CA5000-memory.dmp	themida
behavioral1/memory/1724-57-0x00000000008A0000-0x0000000000CA5000-memory.dmp	themida
behavioral1/memory/1724-58-0x00000000008A0000-0x0000000000CA5000-memory.dmp	themida
behavioral1/memory/1724-59-0x00000000008A0000-0x0000000000CA5000-memory.dmp	themida
behavioral1/memory/1724-60-0x0000000076E90000-0x0000000077010000-memory.dmp	themida
behavioral1/memory/1724-61-0x00000000008A0000-0x0000000000CA5000-memory.dmp	themida
behavioral1/memory/1724-64-0x00000000008A0000-0x0000000000CA5000-memory.dmp	themida

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

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

pid process

1724 bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

1680 timeout.exe

pid	process
1724	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe

pid	process
1680	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.execmd.exe

description	pid	process	target process
PID 1724 wrote to memory of 1076	1724	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe	cmd.exe
PID 1724 wrote to memory of 1076	1724	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe	cmd.exe
PID 1724 wrote to memory of 1076	1724	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe	cmd.exe
PID 1724 wrote to memory of 1076	1724	bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe	cmd.exe
PID 1076 wrote to memory of 1680	1076	cmd.exe	timeout.exe
PID 1076 wrote to memory of 1680	1076	cmd.exe	timeout.exe
PID 1076 wrote to memory of 1680	1076	cmd.exe	timeout.exe
PID 1076 wrote to memory of 1680	1076	cmd.exe	timeout.exe

C:\Users\Admin\AppData\Local\Temp\bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe
"C:\Users\Admin\AppData\Local\Temp\bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Windows\SysWOW64\cmd.exe
  /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\Temp\bf4a76c73c784edff7a499cdc5284f6a6e5d0e4ae6074097feaa5e9b086ee618.exe
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1076
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 3
    3⤵
    - Delays execution with timeout.exe
    PID:1680

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

1

T1497

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

3

T1012

System Information Discovery

2

T1082

Virtualization/Sandbox Evasion

1

T1497

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

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Downloads

memory/1076-63-0x0000000000000000-mapping.dmp

Download
memory/1680-65-0x0000000000000000-mapping.dmp

Download
memory/1724-57-0x00000000008A0000-0x0000000000CA5000-memory.dmp

Filesize
4.0MB

Download
memory/1724-54-0x0000000074AB1000-0x0000000074AB3000-memory.dmp

Filesize
8KB

Download
memory/1724-58-0x00000000008A0000-0x0000000000CA5000-memory.dmp

Filesize
4.0MB

Download
memory/1724-59-0x00000000008A0000-0x0000000000CA5000-memory.dmp

Filesize
4.0MB

Download
memory/1724-60-0x0000000076E90000-0x0000000077010000-memory.dmp

Filesize
1.5MB

Download
memory/1724-61-0x00000000008A0000-0x0000000000CA5000-memory.dmp

Filesize
4.0MB

Download
memory/1724-62-0x0000000076E90000-0x0000000077010000-memory.dmp

Filesize
1.5MB

Download
memory/1724-56-0x00000000008A0000-0x0000000000CA5000-memory.dmp

Filesize
4.0MB

Download
memory/1724-64-0x00000000008A0000-0x0000000000CA5000-memory.dmp

Filesize
4.0MB

Download
memory/1724-66-0x0000000076E90000-0x0000000077010000-memory.dmp

Filesize
1.5MB

Download
memory/1724-55-0x00000000008A0000-0x0000000000CA5000-memory.dmp

Filesize
4.0MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads