quasar | af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2

General

Target

af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2.exe
Size

3.1MB
MD5

aefac3053fe23e06c3cd4c123a69ca37
SHA1

3971e70e42e0148deb5b879da32bdcf6e3702197
SHA256

af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2
SHA512

2d611803fabd368214d61ef345eea20e41090a4db196e300782fb06d6fada2c548f909e3362a7c40852b3aab239b60e1acd613e523508be18f5e370375f40242
SSDEEP

49152:GvUt62XlaSFNWPjljiFa2RoUYItaRJ61bR3LoGdf4pTHHB72eh2NT:GvI62XlaSFNWPjljiFXRoUYItaRJ6HP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.28:4782

Mutex

21dc5e45-8c42-4e7e-a882-b318788e9ca8

Attributes

encryption_key
C77A16FAC6C225B2DB880A8156F0D384EB290A9E
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Boostrapper
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/2752-1-0x0000000000E40000-0x0000000001164000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b84-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4764	Client.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
3824	schtasks.exe
1128	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2752	af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2.exe
Token: SeDebugPrivilege	4764	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4764	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4764	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4764	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 3824	2752	af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2.exe	83
PID 2752 wrote to memory of 3824	2752	af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2.exe	83
PID 2752 wrote to memory of 4764	2752	af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2.exe	85
PID 2752 wrote to memory of 4764	2752	af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2.exe	85
PID 4764 wrote to memory of 1128	4764	Client.exe	86
PID 4764 wrote to memory of 1128	4764	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\af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2.exe
"C:\Users\Admin\AppData\Local\Temp\af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Boostrapper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3824
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\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:4764
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Boostrapper" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1128

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:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
aefac3053fe23e06c3cd4c123a69ca37

SHA1
3971e70e42e0148deb5b879da32bdcf6e3702197

SHA256
af6a17197ef3da87971496daf39475598053e250d58c82c610d55ce4267102e2

SHA512
2d611803fabd368214d61ef345eea20e41090a4db196e300782fb06d6fada2c548f909e3362a7c40852b3aab239b60e1acd613e523508be18f5e370375f40242

Download Submit
memory/2752-0-0x00007FFDC4013000-0x00007FFDC4015000-memory.dmp

Filesize
8KB

Download
memory/2752-1-0x0000000000E40000-0x0000000001164000-memory.dmp

Filesize
3.1MB

Download
memory/2752-2-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

Filesize
10.8MB

Download
memory/2752-10-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4764-9-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4764-11-0x00007FFDC4010000-0x00007FFDC4AD1000-memory.dmp

Filesize
10.8MB

Download
memory/4764-12-0x000000001C7C0000-0x000000001C810000-memory.dmp

Filesize
320KB

Download
memory/4764-13-0x000000001C8D0000-0x000000001C982000-memory.dmp

Filesize
712KB

Download
memory/4764-14-0x00007FFDC4010000-0x00007FFDC4AD1000-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