quasar | 8ae0f170187701c391a7ef44d957dde423be508bff66e13ad7e375153230011a

Analysis

max time kernel
150s
max time network
135s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
28-04-2024 03:21

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General

Target

SeroXenPTO/SeroXen.exe
Size

38.6MB
MD5

89a7d73bad622bbd0b9dfb8e80f8c42e
SHA1

f1ac96f1d956254c6b2209f457355da89c987d8f
SHA256

7cb37cd110a388998ce95819da915446331f614a5da8d5cfeed953812ada23f1
SHA512

760e8e7087ac107ec9e12caaa26968142ddd62ddd82d0e6abfcaa35de8f03917323e97147e72b63fb3dca27756726f4f8fa68f89f9e5acc70898c4c4b0a7bdd0
SSDEEP

786432:anvEMOXrlkmTo5oJqpP2jXHUOqL4UoncLbd+fMY4RPHpHCpqBa4CE:anMMIrX05LsT0OqL4Uocd+fM/PlCpqcE

Score

10^/10

quasar evasion spyware themida trojan

Malware Config

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral24/memory/456-1-0x0000020D42100000-0x0000020D44794000-memory.dmp	family_quasar
behavioral24/memory/456-3-0x0000020D44B50000-0x0000020D44B66000-memory.dmp	family_quasar

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

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

SeroXen.exe

description ioc process

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

description	ioc	process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	SeroXen.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:

SeroXen.exe

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

Loads dropped DLL 1 IoCs

Processes:

SeroXen.exe

pid process

456 SeroXen.exe

pid	process
456	SeroXen.exe

Themida packer 13 IoCs

Detects Themida, an advanced Windows software protection system.

themida

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\e598627d-8851-4529-8c98-58e978071e98\C5VM64.dll	themida
behavioral24/memory/456-11-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-12-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-22-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-24-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-28-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-29-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-30-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-32-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-34-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-37-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-38-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida
behavioral24/memory/456-40-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

SeroXen.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA SeroXen.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

Processes:

SeroXen.exe

pid process

456 SeroXen.exe
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

SeroXen.exe

pid process

456 SeroXen.exe
456 SeroXen.exe
456 SeroXen.exe

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

pid	process
456	SeroXen.exe

pid	process
456	SeroXen.exe
456	SeroXen.exe
456	SeroXen.exe

C:\Users\Admin\AppData\Local\Temp\SeroXenPTO\SeroXen.exe
"C:\Users\Admin\AppData\Local\Temp\SeroXenPTO\SeroXen.exe"
1⤵
- Identifies VirtualBox via ACPI registry values (likely anti-VM)
- Checks BIOS information in registry
- Loads dropped DLL
- Checks whether UAC is enabled
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:456

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Virtualization/Sandbox Evasion

T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\e598627d-8851-4529-8c98-58e978071e98\C5VM64.dll
Filesize
3.0MB

MD5
e3bd88b3c3e9b33dfa72c814f8826cff

SHA1
6d220c9eb7ee695f2b9dec261941bed59cac15e4

SHA256
28e9458a43e5d86a341590eaa83d0da18c29fce81f2383d84bda484e049a1796

SHA512
fcb7e384b5bda0f810c4b6190a991bd066eedfc8fc97af9837cda1ba480385c8bc09bd703c1029f9d8d8a3eea3dbc03af97b014b4713a4ceea6ad6ae85b3b6e9

Download Submit
memory/456-21-0x00007FFDA5AB0000-0x00007FFDA5FA2000-memory.dmp

Filesize
4.9MB

Download
memory/456-37-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-3-0x0000020D44B50000-0x0000020D44B66000-memory.dmp

Filesize
88KB

Download
memory/456-4-0x0000020D5EDA0000-0x0000020D5EE6A000-memory.dmp

Filesize
808KB

Download
memory/456-1-0x0000020D42100000-0x0000020D44794000-memory.dmp

Filesize
38.6MB

Download
memory/456-11-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-12-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-13-0x00007FFDCCC90000-0x00007FFDCCE85000-memory.dmp

Filesize
2.0MB

Download
memory/456-14-0x00007FFDAD2F0000-0x00007FFDAD43E000-memory.dmp

Filesize
1.3MB

Download
memory/456-15-0x0000020D5F220000-0x0000020D5F334000-memory.dmp

Filesize
1.1MB

Download
memory/456-16-0x0000020D46370000-0x0000020D4639C000-memory.dmp

Filesize
176KB

Download
memory/456-17-0x0000020D44BA0000-0x0000020D44BC2000-memory.dmp

Filesize
136KB

Download
memory/456-40-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-2-0x0000020D5ED90000-0x0000020D5EDA0000-memory.dmp

Filesize
64KB

Download
memory/456-26-0x00007FFDCCC90000-0x00007FFDCCE85000-memory.dmp

Filesize
2.0MB

Download
memory/456-23-0x00007FFDAEA40000-0x00007FFDAF501000-memory.dmp

Filesize
10.8MB

Download
memory/456-24-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-25-0x0000020D5ED90000-0x0000020D5EDA0000-memory.dmp

Filesize
64KB

Download
memory/456-22-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-27-0x00007FFDA5AB0000-0x00007FFDA5FA2000-memory.dmp

Filesize
4.9MB

Download
memory/456-28-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-29-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-30-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-32-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-34-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-0-0x00007FFDAEA40000-0x00007FFDAF501000-memory.dmp

Filesize
10.8MB

Download
memory/456-38-0x00007FFDA5FB0000-0x00007FFDA680F000-memory.dmp

Filesize
8.4MB

Download
memory/456-18-0x00007FFDA5AB0000-0x00007FFDA5FA2000-memory.dmp

Filesize
4.9MB

Download