quasar | 9b87f3813641da8be21f130cdd5cb52c2f8ae5494a408d2303f9770b7f3039d8

General

Target

SiHost.exe
Size

348KB
MD5

c6250d3d376c1956627bf8f4f827bbd6
SHA1

7444e248bc182e849556cfa3c2519e30ae8ee82f
SHA256

9b87f3813641da8be21f130cdd5cb52c2f8ae5494a408d2303f9770b7f3039d8
SHA512

8de084cac0e01c8d5b1c8e5443ef97a1412bb4b7ed41d1e4c5e1b5e40750b0bb6d06c9a3b16e325ca8bbe260397ee130560d0d699ff302f2ef5f8196231fa44e
SSDEEP

6144:ON13U1vhtvTA1B3jZwIbmXtNx47cSm3Bs3:iUJtLAX3jMXtNyw3Bs3

Score

10^/10

quasar farrag spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Farrag

C2

17.ip.gl.ply.gg:33386

Mutex

QSR_MUTEX_4Q6TQpIEBpG4GGALTz

Attributes

encryption_key
qZ74sJrr75km6SoIX0sF
install_name
SiHost.exe
log_directory
SiHost
reconnect_delay
3000
startup_key
SiHost
subdirectory
SiHost

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/1620-1-0x00000000008D0000-0x000000000092E000-memory.dmp	family_quasar
behavioral1/files/0x002a000000013a88-5.dat	family_quasar
behavioral1/memory/2536-10-0x0000000000DC0000-0x0000000000E1E000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2536	SiHost.exe

Loads dropped DLL 1 IoCs

pid	Process
1620	SiHost.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	ip-api.com

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\SiHost\SiHost.exe	SiHost.exe
File opened for modification	C:\Windows\SysWOW64\SiHost\SiHost.exe	SiHost.exe
File opened for modification	C:\Windows\SysWOW64\SiHost\SiHost.exe	SiHost.exe
File opened for modification	C:\Windows\SysWOW64\SiHost	SiHost.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
2604	schtasks.exe
2516	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1620	SiHost.exe
Token: SeDebugPrivilege	2536	SiHost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2536	SiHost.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1620 wrote to memory of 2604	1620	SiHost.exe	29
PID 1620 wrote to memory of 2604	1620	SiHost.exe	29
PID 1620 wrote to memory of 2604	1620	SiHost.exe	29
PID 1620 wrote to memory of 2604	1620	SiHost.exe	29
PID 1620 wrote to memory of 2536	1620	SiHost.exe	31
PID 1620 wrote to memory of 2536	1620	SiHost.exe	31
PID 1620 wrote to memory of 2536	1620	SiHost.exe	31
PID 1620 wrote to memory of 2536	1620	SiHost.exe	31
PID 2536 wrote to memory of 2516	2536	SiHost.exe	32
PID 2536 wrote to memory of 2516	2536	SiHost.exe	32
PID 2536 wrote to memory of 2516	2536	SiHost.exe	32
PID 2536 wrote to memory of 2516	2536	SiHost.exe	32

C:\Users\Admin\AppData\Local\Temp\SiHost.exe
"C:\Users\Admin\AppData\Local\Temp\SiHost.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1620
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "SiHost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\SiHost.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:2604
- C:\Windows\SysWOW64\SiHost\SiHost.exe
  "C:\Windows\SysWOW64\SiHost\SiHost.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2536
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "SiHost" /sc ONLOGON /tr "C:\Windows\SysWOW64\SiHost\SiHost.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Windows\SysWOW64\SiHost\SiHost.exe

Filesize
348KB

MD5
c6250d3d376c1956627bf8f4f827bbd6

SHA1
7444e248bc182e849556cfa3c2519e30ae8ee82f

SHA256
9b87f3813641da8be21f130cdd5cb52c2f8ae5494a408d2303f9770b7f3039d8

SHA512
8de084cac0e01c8d5b1c8e5443ef97a1412bb4b7ed41d1e4c5e1b5e40750b0bb6d06c9a3b16e325ca8bbe260397ee130560d0d699ff302f2ef5f8196231fa44e

Download Submit
memory/1620-0-0x000000007413E000-0x000000007413F000-memory.dmp

Filesize
4KB

Download
memory/1620-1-0x00000000008D0000-0x000000000092E000-memory.dmp

Filesize
376KB

Download
memory/1620-2-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/1620-13-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2536-10-0x0000000000DC0000-0x0000000000E1E000-memory.dmp

Filesize
376KB

Download
memory/2536-11-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2536-12-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2536-15-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download
memory/2536-16-0x0000000074130000-0x000000007481E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads