quasar | 611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7

General

Target

611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7.exe
Size

3.1MB
MD5

64da51697ac726c1e27f5d7899c89cac
SHA1

29f336e761644ff1bd932d5649b5275fd7fd79b3
SHA256

611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7
SHA512

a4a123f0787b23a29c77ae6a3baa348cddbfe8b0232d0562982874462f49cf3ec4066356837780be8b3b516d640049b47e4cfea0e0659e37beed8f2265d92751
SSDEEP

49152:Wvht62XlaSFNWPjljiFa2RoUYISURJ6jbR3LoGddTHHB72eh2NT:WvL62XlaSFNWPjljiFXRoUYISURJ6V

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

98.51.190.130:20

Mutex

11bbf22e-826e-486b-b024-adbd86228a9e

Attributes

encryption_key
7A589EDBC6A581E125BF830EF0D05FC74BB75E30
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ctfmon
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/4480-1-0x0000000000190000-0x00000000004B4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b9c-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1044	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
512	schtasks.exe
3292	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4480	611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7.exe
Token: SeDebugPrivilege	1044	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1044	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1044	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1044	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 512	4480	611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7.exe	83
PID 4480 wrote to memory of 512	4480	611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7.exe	83
PID 4480 wrote to memory of 1044	4480	611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7.exe	85
PID 4480 wrote to memory of 1044	4480	611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7.exe	85
PID 1044 wrote to memory of 3292	1044	Client.exe	86
PID 1044 wrote to memory of 3292	1044	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\611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7.exe
"C:\Users\Admin\AppData\Local\Temp\611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4480
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:512
- 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:1044
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3292

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
64da51697ac726c1e27f5d7899c89cac

SHA1
29f336e761644ff1bd932d5649b5275fd7fd79b3

SHA256
611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7

SHA512
a4a123f0787b23a29c77ae6a3baa348cddbfe8b0232d0562982874462f49cf3ec4066356837780be8b3b516d640049b47e4cfea0e0659e37beed8f2265d92751

Download Submit
memory/1044-9-0x00007FF998060000-0x00007FF998B21000-memory.dmp

Filesize
10.8MB

Download
memory/1044-11-0x00007FF998060000-0x00007FF998B21000-memory.dmp

Filesize
10.8MB

Download
memory/1044-12-0x000000001C020000-0x000000001C070000-memory.dmp

Filesize
320KB

Download
memory/1044-13-0x000000001C130000-0x000000001C1E2000-memory.dmp

Filesize
712KB

Download
memory/1044-14-0x00007FF998060000-0x00007FF998B21000-memory.dmp

Filesize
10.8MB

Download
memory/4480-0-0x00007FF998063000-0x00007FF998065000-memory.dmp

Filesize
8KB

Download
memory/4480-1-0x0000000000190000-0x00000000004B4000-memory.dmp

Filesize
3.1MB

Download
memory/4480-2-0x00007FF998060000-0x00007FF998B21000-memory.dmp

Filesize
10.8MB

Download
memory/4480-10-0x00007FF998060000-0x00007FF998B21000-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