quasar | 545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80

General

Target

545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
Size

625KB
MD5

0ab869a3a06f47cd99e5164e76d0ed33
SHA1

19a4f343aeafa888b1b45e95f238ef537cbfe451
SHA256

545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80
SHA512

46987f55f6674a74606d2b106036d35b2c95b4ce4eceb3355132881fc9f730e4f1ef31d874ee1d271ddfb1ed0a21f665c99966a0c531b073fe3b42ad5bd1e0da

Score

10^/10

quasar venomrat 1 persistence rat rootkit spyware stealer suricata trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

1

C2

10.0.2.15:1337

Mutex

VNM_MUTEX_28broDsmlFWTzx7r3B

Attributes

encryption_key
0hi0YaDWMh7jhT37Tcsm
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Defender
subdirectory
SubDir

Signatures

Contains code to disable Windows Defender 3 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource	yara_rule
behavioral2/files/0x000400000001e54f-138.dat	disable_win_def
behavioral2/files/0x000400000001e54f-139.dat	disable_win_def
behavioral2/memory/4832-140-0x0000000000B60000-0x0000000000BEC000-memory.dmp	disable_win_def

Quasar Payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/files/0x000400000001e54f-138.dat	family_quasar
behavioral2/files/0x000400000001e54f-139.dat	family_quasar
behavioral2/memory/4832-140-0x0000000000B60000-0x0000000000BEC000-memory.dmp	family_quasar

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata

Executes dropped EXE 2 IoCs

Processes:

Passwords.exeIwpblky.exe

pid	Process
712	Passwords.exe
4832	Iwpblky.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exePasswords.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	Passwords.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Iwpblky.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Iwpblky.exe\""	Iwpblky.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.

Processes:

flow	ioc
19	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task

T1053

Processes:

schtasks.exe

pid	Process
5040	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Iwpblky.exe

description	pid	Process
Token: SeDebugPrivilege	4832	Iwpblky.exe
Token: SeDebugPrivilege	4832	Iwpblky.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Iwpblky.exe

pid	Process
4832	Iwpblky.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exePasswords.exeIwpblky.exe

description	pid	Process	procid_target
PID 3064 wrote to memory of 712	3064	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe	80
PID 3064 wrote to memory of 712	3064	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe	80
PID 3064 wrote to memory of 712	3064	545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe	80
PID 712 wrote to memory of 4832	712	Passwords.exe	84
PID 712 wrote to memory of 4832	712	Passwords.exe	84
PID 712 wrote to memory of 4832	712	Passwords.exe	84
PID 4832 wrote to memory of 5040	4832	Iwpblky.exe	86
PID 4832 wrote to memory of 5040	4832	Iwpblky.exe	86
PID 4832 wrote to memory of 5040	4832	Iwpblky.exe	86

C:\Users\Admin\AppData\Local\Temp\545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe
"C:\Users\Admin\AppData\Local\Temp\545d4b0dcf911ffdf44b5bf01dfef7be8421e05250806eb03ffb25e736961b80.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3064
- C:\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe
  "C:\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:712
- - C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe
    "C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4832
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe" /rl HIGHEST /f
      4⤵
      Creates scheduled task(s)
      PID:5040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe

Filesize
534KB

MD5
7877fc84e5fad8018d10fedee3fd7b4e

SHA1
ee58d0a7ee2db778d20bf292393696614443fefa

SHA256
2a2e8ebc771d27fc3b32a7e059e1f9aa458324cb225ebea2b4bed0acd191e1be

SHA512
ba5a3e9072876c89f1c2bb40e748fd6eb7ae0c9eb99756ab4bcd1bb5d5b1dedb1e517b0e3efd354cf3ed58bb3c49b8d365d340d95781b8eb8577e22ab0675175

Download Submit
C:\Users\Admin\AppData\Local\Temp\Iwpblky.exe

Filesize
534KB

MD5
7877fc84e5fad8018d10fedee3fd7b4e

SHA1
ee58d0a7ee2db778d20bf292393696614443fefa

SHA256
2a2e8ebc771d27fc3b32a7e059e1f9aa458324cb225ebea2b4bed0acd191e1be

SHA512
ba5a3e9072876c89f1c2bb40e748fd6eb7ae0c9eb99756ab4bcd1bb5d5b1dedb1e517b0e3efd354cf3ed58bb3c49b8d365d340d95781b8eb8577e22ab0675175

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe

Filesize
351KB

MD5
ce5ad18cc090c8a1405f084d9144671d

SHA1
67530a17331ad6477e4b25ef866412349791a3cb

SHA256
bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

SHA512
66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\Passwords.exe

Filesize
351KB

MD5
ce5ad18cc090c8a1405f084d9144671d

SHA1
67530a17331ad6477e4b25ef866412349791a3cb

SHA256
bf79b08db6040f007e6ba07e7628388df2ab9f666e75b16e230d3e9d8600ab31

SHA512
66f3d07eb12c2a94f30fd37dadf832769fb87d10be3751f91ac474f4e72d86b535c5159f7fe2ac80500a844e9a7ace0db1d6dac69c1150475f03c207b9e8bc2a

Download Submit
memory/712-133-0x0000000000400000-0x0000000000460000-memory.dmp

Filesize
384KB

Download
memory/712-135-0x0000000004E80000-0x0000000004F12000-memory.dmp

Filesize
584KB

Download
memory/712-136-0x0000000002470000-0x000000000247A000-memory.dmp

Filesize
40KB

Download
memory/712-134-0x00000000048D0000-0x0000000004E74000-memory.dmp

Filesize
5.6MB

Download
memory/712-130-0x0000000000000000-mapping.dmp

Download
memory/4832-137-0x0000000000000000-mapping.dmp

Download
memory/4832-140-0x0000000000B60000-0x0000000000BEC000-memory.dmp

Filesize
560KB

Download
memory/4832-141-0x00000000058C0000-0x0000000005926000-memory.dmp

Filesize
408KB

Download
memory/4832-142-0x00000000059D0000-0x00000000059E2000-memory.dmp

Filesize
72KB

Download
memory/4832-143-0x00000000068B0000-0x00000000068EC000-memory.dmp

Filesize
240KB

Download
memory/5040-144-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads