quasar | fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee

General

Target

fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe
Size

502KB
MD5

05aa0a6d16f1dabf72b4c880a5d357d0
SHA1

4a3ebaa010ba5306cd09c07eb26bbe99ff46496f
SHA256

fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee
SHA512

931a147bf27a8a14db99b8f6480dddfa2bd1e0b4aaa59092552ef93e9f93adddbcb71d7d9c7a1f45f7854e32d16555dc7f3be701a2df9578a9e99349e972758a
SSDEEP

6144:pTEgdc0YZXAGbgiIN2RSBX/bbVbkbLyUR3mRfbNcEIHb8F9w/Vg6cTR3K:pTEgdfY1bg7bNk2RB4kiVPcdK

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

69.160.242.105:4782

69.160.242.105:11066

Mutex

66661e0f-33c3-4f2f-88be-1634de535cd1

Attributes

encryption_key
CBED6820557E8011D93BA51D49F569DE8C1F98B4
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
java updater
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/4052-1-0x0000000000F80000-0x0000000001004000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023c94-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4448	Client.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe

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

System Information Discovery
T1082

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
4688	schtasks.exe
4268	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4052	fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe
Token: SeDebugPrivilege	4448	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4448	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4448	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4448	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4052 wrote to memory of 4688	4052	fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe	83
PID 4052 wrote to memory of 4688	4052	fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe	83
PID 4052 wrote to memory of 4448	4052	fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe	85
PID 4052 wrote to memory of 4448	4052	fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe	85
PID 4448 wrote to memory of 4268	4448	Client.exe	86
PID 4448 wrote to memory of 4268	4448	Client.exe	86

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\fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe
"C:\Users\Admin\AppData\Local\Temp\fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4052
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4688
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4448
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4268

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Client.exe

Filesize
502KB

MD5
05aa0a6d16f1dabf72b4c880a5d357d0

SHA1
4a3ebaa010ba5306cd09c07eb26bbe99ff46496f

SHA256
fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee

SHA512
931a147bf27a8a14db99b8f6480dddfa2bd1e0b4aaa59092552ef93e9f93adddbcb71d7d9c7a1f45f7854e32d16555dc7f3be701a2df9578a9e99349e972758a

Download Submit
memory/4052-0-0x00007FFD0BD53000-0x00007FFD0BD55000-memory.dmp

Filesize
8KB

Download
memory/4052-1-0x0000000000F80000-0x0000000001004000-memory.dmp

Filesize
528KB

Download
memory/4052-2-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/4052-9-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/4448-8-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/4448-10-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download
memory/4448-11-0x000000001BA40000-0x000000001BA90000-memory.dmp

Filesize
320KB

Download
memory/4448-12-0x000000001BB50000-0x000000001BC02000-memory.dmp

Filesize
712KB

Download
memory/4448-13-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads