quasar | cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c

General

Target

cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe
Size

5.7MB
MD5

96dffc6571672657b3f127bc21fb0fbb
SHA1

7d08fa99450903cc373410fb2f290a5fc81cd09c
SHA256

cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c
SHA512

fec77b8fcbbb249b0f853143b467108a23dc26b485a8d6241c7ff4ab82b15cd0ba2d5978d63b1784b7585d4e15436f30a3066308003a9fce7e2c3084766afa8c
SSDEEP

98304:hZHJSCe0418ET3vr22SsaNYfdPBldt6+dBcjHtKRJ6BpRArLDWz0IbzZ+IbzZ0:PML18ETfM7jGIpRA3Anjq

Score

10^/10

quasar office04 discovery spyware trojan upx

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

mx5.deitie.asia:4495

Mutex

ebbf737a-dddd-43dd-9b0a-74831302455d

Attributes

encryption_key
F8516D89A1DFD78BD8FF575BBC3AE828B47FF0E1
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000d000000021e27-50.dat	family_quasar
behavioral2/memory/612-52-0x0000000000330000-0x0000000000654000-memory.dmp	family_quasar

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe

Executes dropped EXE 2 IoCs

pid	Process
612	sign.exe
3872	Client.exe

UPX packed file 27 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1564-0-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-1-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-33-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-31-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-44-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-41-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-25-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-23-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-19-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-17-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-15-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-13-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-46-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-45-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-40-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-38-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-35-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-2-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-29-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-27-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-21-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-11-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-9-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-7-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-5-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-3-0x0000000010000000-0x000000001003E000-memory.dmp	upx
behavioral2/memory/1564-65-0x0000000010000000-0x000000001003E000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4392	schtasks.exe
2908	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1564	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe
1564	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	612	sign.exe
Token: SeDebugPrivilege	3872	Client.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1564	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe
1564	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe
1564	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1564 wrote to memory of 612	1564	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe	85
PID 1564 wrote to memory of 612	1564	cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe	85
PID 612 wrote to memory of 2908	612	sign.exe	89
PID 612 wrote to memory of 2908	612	sign.exe	89
PID 612 wrote to memory of 3872	612	sign.exe	91
PID 612 wrote to memory of 3872	612	sign.exe	91
PID 3872 wrote to memory of 4392	3872	Client.exe	92
PID 3872 wrote to memory of 4392	3872	Client.exe	92

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe
"C:\Users\Admin\AppData\Local\Temp\cde670909af05844a847ee5ce7ec33071c95dae5a42c7766711150eac8c3000c.exe"
1⤵
- Drops startup file
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1564
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\\sign.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:612
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2908
- - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3872
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:4392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\sign.exe

Filesize
3.1MB

MD5
7498d554976744dfbd271ba755c6c192

SHA1
ec733d01e776518e387d2f51d1a6559b81f03b1e

SHA256
44089202623b9671051aa5bba5e72f81f68ce818c3054dde57726aaa6dcb9ff7

SHA512
d4e987d0e6235001fac4ae3a634e8fe98c6830e26a6a6876fbc36262842688d3ec301cff75003d2af695cdfd357ac50919946695b7d5d3293ebcba97153e1030

Download Submit
memory/612-62-0x00007FF982130000-0x00007FF982BF1000-memory.dmp

Filesize
10.8MB

Download
memory/612-53-0x00007FF982130000-0x00007FF982BF1000-memory.dmp

Filesize
10.8MB

Download
memory/612-51-0x00007FF982133000-0x00007FF982135000-memory.dmp

Filesize
8KB

Download
memory/612-52-0x0000000000330000-0x0000000000654000-memory.dmp

Filesize
3.1MB

Download
memory/1564-25-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-35-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-31-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-41-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-0-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-23-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-19-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-17-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-15-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-13-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-46-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-45-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-40-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-33-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-38-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-44-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-2-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-29-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-27-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-21-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-11-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-9-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-7-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-5-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-3-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-65-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/1564-1-0x0000000010000000-0x000000001003E000-memory.dmp

Filesize
248KB

Download
memory/3872-63-0x000000001C090000-0x000000001C0E0000-memory.dmp

Filesize
320KB

Download
memory/3872-64-0x000000001C4B0000-0x000000001C562000-memory.dmp

Filesize
712KB

Download
memory/3872-61-0x00007FF982130000-0x00007FF982BF1000-memory.dmp

Filesize
10.8MB

Download
memory/3872-66-0x00007FF982130000-0x00007FF982BF1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads