quasar | e3b41c65b9ee28473b4487dc2879f7a2fe3ce33b52c1e4d351150a2f711c7026

Analysis

max time kernel
148s
max time network
153s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
09/09/2022, 18:55

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General

Target

xbatrat.exe
Size

502KB
MD5

1b99c3604d4eb55f98c6636b0ce14b65
SHA1

28cd7c17f63e7b9648fca117c3ad4a05efb06066
SHA256

e3b41c65b9ee28473b4487dc2879f7a2fe3ce33b52c1e4d351150a2f711c7026
SHA512

6c2eca1c7bd21d954e51ee0dfe9989160bf1a1fbd04cf68b5260cadf55171346d1f4a6e20d951edf5cd4021999a60e3784d0e91268bc3725a5c95188b247ec23
SSDEEP

6144:sTEgdc0YuXAGbgiIN2RSBxddqWU8M2MYMFsZ/wcETOb8F991AAZcTR3X:sTEgdfYsbgdHMILODpJAUcdX

Score

10^/10

quasar xbatrattest spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

xbatrattest

70.70.19.220:4782

70.70.19.220:4753

Mutex

5ffbb4f2-1bd6-4f75-92b6-cb1256f7a126

Attributes

encryption_key
45C5892F7FC83E096480FE9D090E9A8D064D660F
install_name
Javart.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java
subdirectory
Java48

Signatures

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

Quasar payload 4 IoCs

resource	yara_rule
behavioral1/memory/832-54-0x00000000003C0000-0x0000000000444000-memory.dmp	family_quasar
behavioral1/files/0x000b0000000122d6-58.dat	family_quasar
behavioral1/files/0x000b0000000122d6-59.dat	family_quasar
behavioral1/memory/1072-60-0x0000000000270000-0x00000000002F4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1072	Javart.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files\Java48\Javart.exe	xbatrat.exe
File opened for modification	C:\Program Files\Java48\Javart.exe	xbatrat.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

T1053

pid	Process
1132	schtasks.exe
520	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	832	xbatrat.exe
Token: SeDebugPrivilege	1072	Javart.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1072	Javart.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 832 wrote to memory of 1132	832	xbatrat.exe	28
PID 832 wrote to memory of 1132	832	xbatrat.exe	28
PID 832 wrote to memory of 1132	832	xbatrat.exe	28
PID 832 wrote to memory of 1072	832	xbatrat.exe	30
PID 832 wrote to memory of 1072	832	xbatrat.exe	30
PID 832 wrote to memory of 1072	832	xbatrat.exe	30
PID 1072 wrote to memory of 520	1072	Javart.exe	31
PID 1072 wrote to memory of 520	1072	Javart.exe	31
PID 1072 wrote to memory of 520	1072	Javart.exe	31

C:\Users\Admin\AppData\Local\Temp\xbatrat.exe
"C:\Users\Admin\AppData\Local\Temp\xbatrat.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:832
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Java" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\xbatrat.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1132
- C:\Program Files\Java48\Javart.exe
  "C:\Program Files\Java48\Javart.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1072
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Java" /sc ONLOGON /tr "C:\Program Files\Java48\Javart.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:520

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Program Files\Java48\Javart.exe

Filesize
502KB

MD5
1b99c3604d4eb55f98c6636b0ce14b65

SHA1
28cd7c17f63e7b9648fca117c3ad4a05efb06066

SHA256
e3b41c65b9ee28473b4487dc2879f7a2fe3ce33b52c1e4d351150a2f711c7026

SHA512
6c2eca1c7bd21d954e51ee0dfe9989160bf1a1fbd04cf68b5260cadf55171346d1f4a6e20d951edf5cd4021999a60e3784d0e91268bc3725a5c95188b247ec23

Download Submit
C:\Program Files\Java48\Javart.exe

Filesize
502KB

MD5
1b99c3604d4eb55f98c6636b0ce14b65

SHA1
28cd7c17f63e7b9648fca117c3ad4a05efb06066

SHA256
e3b41c65b9ee28473b4487dc2879f7a2fe3ce33b52c1e4d351150a2f711c7026

SHA512
6c2eca1c7bd21d954e51ee0dfe9989160bf1a1fbd04cf68b5260cadf55171346d1f4a6e20d951edf5cd4021999a60e3784d0e91268bc3725a5c95188b247ec23

Download Submit
memory/832-54-0x00000000003C0000-0x0000000000444000-memory.dmp

Filesize
528KB

Download
memory/832-55-0x000007FEFC611000-0x000007FEFC613000-memory.dmp

Filesize
8KB

Download
memory/1072-60-0x0000000000270000-0x00000000002F4000-memory.dmp

Filesize
528KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads