quasar | 0cbcab350f25f5764dc967cf6f764eccdd094b1f8ca14d60a731713ace6b1aec

General

Target

Modification11910275.exe
Size

3.1MB
MD5

fa9b1524e725c4a251d07007f15fa947
SHA1

5c023619d8180b611acb544fa1cd8bd31de9e61c
SHA256

0cbcab350f25f5764dc967cf6f764eccdd094b1f8ca14d60a731713ace6b1aec
SHA512

dac63f0970092186a909dafeb75cee3e1ad3b393984cf78a1d88e339a39ef235567f74b7a874b237762b8a46e74f8cb319add4bcbc4bdf8f76ec8e1476fb44db
SSDEEP

49152:nvKlL26AaNeWgPhlmVqvMQ7XSKrCW1JeLoGdeSTHHB72eh2NT:nvyL26AaNeWgPhlmVqkQ7XSKrCN

Score

10^/10

quasar bot discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

bot

C2

wooting2000-47095.portmap.host:47095

Mutex

2e05f1ef-743b-4020-b18a-7f4276517e8b

Attributes

encryption_key
E83D6FC31962786DAEA703F111D2381786DF06CA
install_name
Modification1.5.14.12.exe
log_directory
Logs
reconnect_delay
3126
startup_key
explorer.dll
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/memory/2340-1-0x0000000000760000-0x0000000000A84000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b75-6.dat	family_quasar

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	Modification1.5.14.12.exe

Executes dropped EXE 1 IoCs

pid	Process
1496	Modification1.5.14.12.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Modification1.5.14.12.exe	Modification11910275.exe
File opened for modification	C:\Windows\system32\SubDir\Modification1.5.14.12.exe	Modification11910275.exe
File opened for modification	C:\Windows\system32\SubDir	Modification11910275.exe
File opened for modification	C:\Windows\system32\SubDir\Modification1.5.14.12.exe	Modification1.5.14.12.exe
File opened for modification	C:\Windows\system32\SubDir	Modification1.5.14.12.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
2720	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2720	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
1420	schtasks.exe
4140	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2340	Modification11910275.exe
Token: SeDebugPrivilege	1496	Modification1.5.14.12.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1496	Modification1.5.14.12.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2340 wrote to memory of 1420	2340	Modification11910275.exe	83
PID 2340 wrote to memory of 1420	2340	Modification11910275.exe	83
PID 2340 wrote to memory of 1496	2340	Modification11910275.exe	85
PID 2340 wrote to memory of 1496	2340	Modification11910275.exe	85
PID 1496 wrote to memory of 4140	1496	Modification1.5.14.12.exe	86
PID 1496 wrote to memory of 4140	1496	Modification1.5.14.12.exe	86
PID 1496 wrote to memory of 3028	1496	Modification1.5.14.12.exe	101
PID 1496 wrote to memory of 3028	1496	Modification1.5.14.12.exe	101
PID 1496 wrote to memory of 5052	1496	Modification1.5.14.12.exe	103
PID 1496 wrote to memory of 5052	1496	Modification1.5.14.12.exe	103
PID 5052 wrote to memory of 436	5052	cmd.exe	105
PID 5052 wrote to memory of 436	5052	cmd.exe	105
PID 5052 wrote to memory of 2720	5052	cmd.exe	106
PID 5052 wrote to memory of 2720	5052	cmd.exe	106

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\Modification11910275.exe
"C:\Users\Admin\AppData\Local\Temp\Modification11910275.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2340
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "explorer.dll" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Modification1.5.14.12.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1420
- C:\Windows\system32\SubDir\Modification1.5.14.12.exe
  "C:\Windows\system32\SubDir\Modification1.5.14.12.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1496
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "explorer.dll" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Modification1.5.14.12.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4140
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /delete /tn "explorer.dll" /f
    3⤵
    PID:3028
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\r6m4jIKr3qZe.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:5052
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:436
  - - C:\Windows\system32\PING.EXE
      ping -n 10 localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:2720

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

2

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

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\r6m4jIKr3qZe.bat

Filesize
215B

MD5
caa0205578c375a150815c03e062bb3f

SHA1
2e40d7ff5e1aa7c8e10d3699fabe0a2dc723e0c3

SHA256
d89e4cb6aedac5f365ac2926249dd7b87ca456f02a5a00b16fafbbc883cf88b3

SHA512
57fec04bab6f151f66f3c99c821745186eb4a3cb17c4a2f2a4ac456b13c10263d6c3c67211594984f3e955a08e0fa21b57d4bb43a3bfbe038e0f1ab84013087f

Download Submit
C:\Windows\System32\SubDir\Modification1.5.14.12.exe

Filesize
3.1MB

MD5
fa9b1524e725c4a251d07007f15fa947

SHA1
5c023619d8180b611acb544fa1cd8bd31de9e61c

SHA256
0cbcab350f25f5764dc967cf6f764eccdd094b1f8ca14d60a731713ace6b1aec

SHA512
dac63f0970092186a909dafeb75cee3e1ad3b393984cf78a1d88e339a39ef235567f74b7a874b237762b8a46e74f8cb319add4bcbc4bdf8f76ec8e1476fb44db

Download Submit
memory/1496-11-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/1496-9-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/1496-12-0x000000001B910000-0x000000001B960000-memory.dmp

Filesize
320KB

Download
memory/1496-13-0x000000001BA20000-0x000000001BAD2000-memory.dmp

Filesize
712KB

Download
memory/1496-16-0x000000001B9A0000-0x000000001B9B2000-memory.dmp

Filesize
72KB

Download
memory/1496-17-0x000000001C120000-0x000000001C15C000-memory.dmp

Filesize
240KB

Download
memory/1496-18-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/1496-23-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/2340-2-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/2340-10-0x00007FFC30340000-0x00007FFC30E01000-memory.dmp

Filesize
10.8MB

Download
memory/2340-0-0x00007FFC30343000-0x00007FFC30345000-memory.dmp

Filesize
8KB

Download
memory/2340-1-0x0000000000760000-0x0000000000A84000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads