quasar | 70da41b661dc8de4e8cd1bde0f17f434433115bffad2fb762205b734acd4ed35

General

Target

9860743c4ff83784de05aa8444594aed.exe
Size

14KB
MD5

9860743c4ff83784de05aa8444594aed
SHA1

517ab424f9f6ee8de223e396691f1cb3b2d01a09
SHA256

70da41b661dc8de4e8cd1bde0f17f434433115bffad2fb762205b734acd4ed35
SHA512

cae8c9f056f7556d30e170caca7b4146baf00eaa32b6d2fac8659d2547d97e1461ee8cce0b123db02d5497faf9e12057d5daa530b4b8e722d73c66e769064b88

Score

10^/10

quasar helper spyware suricata trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

helper

C2

41.79.11.214:61032

Mutex

307d89ac-968f-48de-a3b3-0c81d2cf4d4a

Attributes

encryption_key
0D0F7891BD61AE0C503175723ADA783C9973F3B8
install_name
DllHelper.exe
log_directory
Logs
reconnect_delay
5000
startup_key
DllHelper
subdirectory
DllHelper

Signatures

Quasar Payload 4 IoCs

resource	yara_rule
behavioral2/files/0x00020000000155f8-116.dat	family_quasar
behavioral2/files/0x00020000000155f8-117.dat	family_quasar
behavioral2/files/0x00020000000155fa-123.dat	family_quasar
behavioral2/files/0x00020000000155fa-124.dat	family_quasar

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
suricata: ET MALWARE Observed Malicious SSL Cert (Quasar CnC)
suricata: ET MALWARE Observed Malicious SSL Cert (Quasar CnC)
suricata
Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
3916	jmwigosg.exe
4244	DllHelper.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wmic.exe	9860743c4ff83784de05aa8444594aed.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\wmic.exe	9860743c4ff83784de05aa8444594aed.exe

Looks up external IP address via web service 2 IoCs

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

flow	ioc
23	api.ipify.org
24	api.ipify.org

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

T1053

pid	Process
4044	schtasks.exe
420	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3916	jmwigosg.exe
Token: SeDebugPrivilege	4244	DllHelper.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4244	DllHelper.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3672 wrote to memory of 3916	3672	9860743c4ff83784de05aa8444594aed.exe	70
PID 3672 wrote to memory of 3916	3672	9860743c4ff83784de05aa8444594aed.exe	70
PID 3916 wrote to memory of 4044	3916	jmwigosg.exe	72
PID 3916 wrote to memory of 4044	3916	jmwigosg.exe	72
PID 3916 wrote to memory of 4244	3916	jmwigosg.exe	73
PID 3916 wrote to memory of 4244	3916	jmwigosg.exe	73
PID 4244 wrote to memory of 420	4244	DllHelper.exe	74
PID 4244 wrote to memory of 420	4244	DllHelper.exe	74

C:\Users\Admin\AppData\Local\Temp\9860743c4ff83784de05aa8444594aed.exe
"C:\Users\Admin\AppData\Local\Temp\9860743c4ff83784de05aa8444594aed.exe"
1⤵
- Drops startup file
- Suspicious use of WriteProcessMemory
PID:3672
- C:\Users\Admin\AppData\Local\Temp\jmwigosg.exe
  C:\Users\Admin\AppData\Local\Temp\jmwigosg.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3916
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "DllHelper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\jmwigosg.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4044
- - C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe
    "C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4244
  - - C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "DllHelper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\DllHelper\DllHelper.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:420

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3916-118-0x0000000000AD0000-0x0000000000AD1000-memory.dmp

Filesize
4KB

Download
memory/3916-120-0x000000001B5D0000-0x000000001B5D2000-memory.dmp

Filesize
8KB

Download
memory/4244-127-0x00000000017B0000-0x00000000017B2000-memory.dmp

Filesize
8KB

Download
memory/4244-129-0x0000000001840000-0x0000000001841000-memory.dmp

Filesize
4KB

Download
memory/4244-130-0x000000001DBA0000-0x000000001DBA1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads