taurus | ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0

General

Target

ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe
Size

4.8MB
MD5

9578320a570a9418287a43973257e90f
SHA1

52f78edd0760a78553057aac1c773ac995f71071
SHA256

ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0
SHA512

5c9a7e3aaf464c92444cc356872980f631c2c43edab97b405c720d97f1120720fad47b5401395755488c6cfae16c60697ff615da8c95d7fba2b89dfd94541442
SSDEEP

98304:Hrsj7jgiqLTLBerVAqqBPTec3lHdfVX0erUM5s/:L6ja3BKAjNvVEer

Score

10^/10

taurus discovery evasion spyware stealer themida trojan vmprotect

Malware Config

Signatures

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

Taurus Stealer payload 7 IoCs

resource	yara_rule
behavioral1/memory/1980-62-0x0000000000B90000-0x00000000015A9000-memory.dmp	family_taurus_stealer
behavioral1/memory/1980-63-0x0000000000B90000-0x00000000015A9000-memory.dmp	family_taurus_stealer
behavioral1/memory/1980-64-0x0000000000B90000-0x00000000015A9000-memory.dmp	family_taurus_stealer
behavioral1/memory/1980-66-0x0000000000B90000-0x00000000015A9000-memory.dmp	family_taurus_stealer
behavioral1/memory/1980-67-0x0000000000B90000-0x00000000015A9000-memory.dmp	family_taurus_stealer
behavioral1/memory/1980-68-0x0000000000B90000-0x00000000015A9000-memory.dmp	family_taurus_stealer
behavioral1/memory/1980-71-0x0000000000B90000-0x00000000015A9000-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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe

VMProtect packed file 9 IoCs

Detects executables packed with VMProtect commercial packer.

vmprotect

resource	yara_rule
behavioral1/memory/1980-54-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect
behavioral1/memory/1980-61-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect
behavioral1/memory/1980-62-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect
behavioral1/memory/1980-63-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect
behavioral1/memory/1980-64-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect
behavioral1/memory/1980-66-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect
behavioral1/memory/1980-67-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect
behavioral1/memory/1980-68-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect
behavioral1/memory/1980-71-0x0000000000B90000-0x00000000015A9000-memory.dmp	vmprotect

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\SystemBiosVersion	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe

Deletes itself 1 IoCs

pid	Process
1816	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

Themida packer 9 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral1/memory/1980-54-0x0000000000B90000-0x00000000015A9000-memory.dmp	themida
behavioral1/memory/1980-61-0x0000000000B90000-0x00000000015A9000-memory.dmp	themida
behavioral1/memory/1980-62-0x0000000000B90000-0x00000000015A9000-memory.dmp	themida
behavioral1/memory/1980-63-0x0000000000B90000-0x00000000015A9000-memory.dmp	themida
behavioral1/memory/1980-64-0x0000000000B90000-0x00000000015A9000-memory.dmp	themida
behavioral1/memory/1980-66-0x0000000000B90000-0x00000000015A9000-memory.dmp	themida
behavioral1/memory/1980-67-0x0000000000B90000-0x00000000015A9000-memory.dmp	themida
behavioral1/memory/1980-68-0x0000000000B90000-0x00000000015A9000-memory.dmp	themida
behavioral1/memory/1980-71-0x0000000000B90000-0x00000000015A9000-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

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
1980	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1056	timeout.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1980 wrote to memory of 1816	1980	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe	33
PID 1980 wrote to memory of 1816	1980	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe	33
PID 1980 wrote to memory of 1816	1980	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe	33
PID 1980 wrote to memory of 1816	1980	ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe	33
PID 1816 wrote to memory of 1056	1816	cmd.exe	35
PID 1816 wrote to memory of 1056	1816	cmd.exe	35
PID 1816 wrote to memory of 1056	1816	cmd.exe	35
PID 1816 wrote to memory of 1056	1816	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe
"C:\Users\Admin\AppData\Local\Temp\ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.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:1980
- C:\Windows\SysWOW64\cmd.exe
  /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\Temp\ef63f7d8705ef291353ebbaf3d7661ef8f28cdc3d7cbded767af7b24dfde44f0.exe
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1816
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 3
    3⤵
    - Delays execution with timeout.exe
    PID:1056

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/1980-65-0x0000000077110000-0x0000000077290000-memory.dmp

Filesize
1.5MB

Download
memory/1980-62-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download
memory/1980-63-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download
memory/1980-64-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download
memory/1980-54-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download
memory/1980-66-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download
memory/1980-67-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download
memory/1980-68-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download
memory/1980-61-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download
memory/1980-70-0x0000000077110000-0x0000000077290000-memory.dmp

Filesize
1.5MB

Download
memory/1980-60-0x00000000760C1000-0x00000000760C3000-memory.dmp

Filesize
8KB

Download
memory/1980-71-0x0000000000B90000-0x00000000015A9000-memory.dmp

Filesize
10.1MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads