quasar | b7c453f42f905823c106e6348871c9ad4b78e04e8bff7c3315d784797275687f

General

Target

test.exe
Size

3.1MB
MD5

ec2648334be2e631b82b1382a8940603
SHA1

12403c9ce6e026583d74ebf9a81b208103060bce
SHA256

b7c453f42f905823c106e6348871c9ad4b78e04e8bff7c3315d784797275687f
SHA512

eeb57f3af0b498e581c4c5704e6cf7603cbab4b754320717225394aa215a5575f1015de8831725a2da2f5d3dee7ac3499efae728a5082c25d7dd268d30558787
SSDEEP

49152:Pvht62XlaSFNWPjljiFa2RoUYIFlxNESEKk/i1LoGdfqXlTHHB72eh2NT:PvL62XlaSFNWPjljiFXRoUYIfxhNyX

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.2.51:65535

Mutex

196fbb22-4fc3-4d2e-9e30-bd3ff8496cbf

Attributes

encryption_key
62C0EDEB268B3897916B9C300A334C032152A1EA
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Python Updater
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/1684-1-0x0000000001220000-0x0000000001544000-memory.dmp	family_quasar
behavioral1/files/0x0020000000018b03-6.dat	family_quasar
behavioral1/memory/2960-10-0x0000000000040000-0x0000000000364000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2960	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
2204	schtasks.exe
3016	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1684	test.exe
Token: SeDebugPrivilege	2960	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2960	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2960	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2960	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 2204	1684	test.exe	30
PID 1684 wrote to memory of 2204	1684	test.exe	30
PID 1684 wrote to memory of 2204	1684	test.exe	30
PID 1684 wrote to memory of 2960	1684	test.exe	32
PID 1684 wrote to memory of 2960	1684	test.exe	32
PID 1684 wrote to memory of 2960	1684	test.exe	32
PID 2960 wrote to memory of 3016	2960	Client.exe	33
PID 2960 wrote to memory of 3016	2960	Client.exe	33
PID 2960 wrote to memory of 3016	2960	Client.exe	33

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\test.exe
"C:\Users\Admin\AppData\Local\Temp\test.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Python Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2204
- 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:2960
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Python Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3016

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
ec2648334be2e631b82b1382a8940603

SHA1
12403c9ce6e026583d74ebf9a81b208103060bce

SHA256
b7c453f42f905823c106e6348871c9ad4b78e04e8bff7c3315d784797275687f

SHA512
eeb57f3af0b498e581c4c5704e6cf7603cbab4b754320717225394aa215a5575f1015de8831725a2da2f5d3dee7ac3499efae728a5082c25d7dd268d30558787

Download Submit
memory/1684-0-0x000007FEF5A13000-0x000007FEF5A14000-memory.dmp

Filesize
4KB

Download
memory/1684-1-0x0000000001220000-0x0000000001544000-memory.dmp

Filesize
3.1MB

Download
memory/1684-2-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download
memory/1684-8-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download
memory/2960-9-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download
memory/2960-10-0x0000000000040000-0x0000000000364000-memory.dmp

Filesize
3.1MB

Download
memory/2960-11-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download
memory/2960-12-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download
memory/2960-13-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads