quasar | 19c73e461bc7f6419aa3a7bdb1c953f0ec0c28fcd08a989094673cdcd1348c39

General

Target

nurjhrgbv.exe
Size

3.1MB
MD5

55583e9982ac74b4e17da2004552e5da
SHA1

da79fa80ff490c251c4e1b56051b86b8ab867292
SHA256

19c73e461bc7f6419aa3a7bdb1c953f0ec0c28fcd08a989094673cdcd1348c39
SHA512

699bcb5165b90a7ee7a591e2dc3028eb1f295cd40f6c6ed307d636fae3070b5a4e69ae7cc557d733462e33ffcaed4c3b1afd66b89eceb5479f1b0c11177de337
SSDEEP

49152:rvrI22SsaNYfdPBldt698dBcjHKp61JVLoGdtuWTHHB72eh2NT:rvU22SsaNYfdPBldt6+dBcjHKpg

Score

10^/10

quasar roar discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

roar

C2

weopgtjkjgserhgsfd-43392.portmap.host:43392

Mutex

f8cb2dc4-1bf5-48cb-8213-fa8d6f92d388

Attributes

encryption_key
C5904FDD788EA00F921C538B9FE80C0B0A0DE728
install_name
roar.exe
log_directory
Logs
reconnect_delay
3000
startup_key
discord
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
behavioral3/memory/1920-1-0x0000000000500000-0x0000000000824000-memory.dmp	family_quasar
behavioral3/files/0x001e00000002aa61-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4284	roar.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2320	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2320	PING.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
1100	schtasks.exe
4160	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1920	nurjhrgbv.exe
Token: SeDebugPrivilege	4284	roar.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4284	roar.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1920 wrote to memory of 1100	1920	nurjhrgbv.exe	77
PID 1920 wrote to memory of 1100	1920	nurjhrgbv.exe	77
PID 1920 wrote to memory of 4284	1920	nurjhrgbv.exe	79
PID 1920 wrote to memory of 4284	1920	nurjhrgbv.exe	79
PID 4284 wrote to memory of 4160	4284	roar.exe	80
PID 4284 wrote to memory of 4160	4284	roar.exe	80
PID 4284 wrote to memory of 4288	4284	roar.exe	83
PID 4284 wrote to memory of 4288	4284	roar.exe	83
PID 4284 wrote to memory of 1404	4284	roar.exe	85
PID 4284 wrote to memory of 1404	4284	roar.exe	85
PID 1404 wrote to memory of 4828	1404	cmd.exe	87
PID 1404 wrote to memory of 4828	1404	cmd.exe	87
PID 1404 wrote to memory of 2320	1404	cmd.exe	88
PID 1404 wrote to memory of 2320	1404	cmd.exe	88

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\nurjhrgbv.exe
"C:\Users\Admin\AppData\Local\Temp\nurjhrgbv.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1920
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\roar.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1100
- C:\Users\Admin\AppData\Roaming\SubDir\roar.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\roar.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4284
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\roar.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4160
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /delete /tn "discord" /f
    3⤵
    PID:4288
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\5DvTzvKIN2fN.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1404
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:4828
  - - C:\Windows\system32\PING.EXE
      ping -n 10 localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2320

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

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\5DvTzvKIN2fN.bat

Filesize
209B

MD5
0e1f7cd5d40848fbc22390b5488b2f79

SHA1
035d7cada216c89280463db59324d9d54e74843d

SHA256
bfe0e70959221fcf7f5407ad17633d385b08e5d29ca7673db8bdfe03be22c494

SHA512
11890f4f63c28bb64320fa0e98ff2b8165de9eb15664cf95ddf483f4c0581b9ae80ac7f859ab7de1878011115a3b7a452ce2c47336486a41afb68a2732307428

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\roar.exe

Filesize
3.1MB

MD5
55583e9982ac74b4e17da2004552e5da

SHA1
da79fa80ff490c251c4e1b56051b86b8ab867292

SHA256
19c73e461bc7f6419aa3a7bdb1c953f0ec0c28fcd08a989094673cdcd1348c39

SHA512
699bcb5165b90a7ee7a591e2dc3028eb1f295cd40f6c6ed307d636fae3070b5a4e69ae7cc557d733462e33ffcaed4c3b1afd66b89eceb5479f1b0c11177de337

Download Submit
memory/1920-0-0x00007FFE1C583000-0x00007FFE1C585000-memory.dmp

Filesize
8KB

Download
memory/1920-1-0x0000000000500000-0x0000000000824000-memory.dmp

Filesize
3.1MB

Download
memory/1920-2-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/1920-17-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/4284-11-0x000000001BB60000-0x000000001BBB0000-memory.dmp

Filesize
320KB

Download
memory/4284-12-0x000000001BC70000-0x000000001BD22000-memory.dmp

Filesize
712KB

Download
memory/4284-15-0x000000001BBD0000-0x000000001BBE2000-memory.dmp

Filesize
72KB

Download
memory/4284-16-0x000000001BC30000-0x000000001BC6C000-memory.dmp

Filesize
240KB

Download
memory/4284-10-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/4284-18-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/4284-9-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download
memory/4284-24-0x00007FFE1C580000-0x00007FFE1D042000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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