quasar | ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4

General

Target

ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe
Size

3.1MB
MD5

ff7d780fa5f307da8d52650d52c9f0f7
SHA1

3d687e6aa07995b8415a74cb5700b1abdb48ae3b
SHA256

ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4
SHA512

4ba9b40ae829bec98a7bb156cb574d820b4aaaf4958d0543c9946afa2f5cbfc6989e6bed9ef507f16d9d540e7e85aab24be8d7a87689242610e586f270271e8f
SSDEEP

49152:Svht62XlaSFNWPjljiFa2RoUYIz5aqVkooGdoxTHHB72eh2NT:SvL62XlaSFNWPjljiFXRoUYIz5aqVN4

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

0.tcp.us-cal-1.ngrok.io:15579

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 3 IoCs

resource	yara_rule
behavioral1/memory/2200-1-0x00000000010C0000-0x00000000013E4000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016d3f-6.dat	family_quasar
behavioral1/memory/3044-10-0x0000000000D10000-0x0000000001034000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3044	Client.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
24	0.tcp.us-cal-1.ngrok.io
2	0.tcp.us-cal-1.ngrok.io
15	0.tcp.us-cal-1.ngrok.io

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
2616	schtasks.exe
2532	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2200	ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe
Token: SeDebugPrivilege	3044	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
3044	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
3044	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3044	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2200 wrote to memory of 2616	2200	ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe	30
PID 2200 wrote to memory of 2616	2200	ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe	30
PID 2200 wrote to memory of 2616	2200	ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe	30
PID 2200 wrote to memory of 3044	2200	ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe	32
PID 2200 wrote to memory of 3044	2200	ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe	32
PID 2200 wrote to memory of 3044	2200	ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe	32
PID 3044 wrote to memory of 2532	3044	Client.exe	34
PID 3044 wrote to memory of 2532	3044	Client.exe	34
PID 3044 wrote to memory of 2532	3044	Client.exe	34

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\ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe
"C:\Users\Admin\AppData\Local\Temp\ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2200
- 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:2616
- 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:3044
- - 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:2532

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
ff7d780fa5f307da8d52650d52c9f0f7

SHA1
3d687e6aa07995b8415a74cb5700b1abdb48ae3b

SHA256
ed340526b36db90f266db2a5f1c48c109ecc51ea6bdb9e907240c3da858b74e4

SHA512
4ba9b40ae829bec98a7bb156cb574d820b4aaaf4958d0543c9946afa2f5cbfc6989e6bed9ef507f16d9d540e7e85aab24be8d7a87689242610e586f270271e8f

Download Submit
memory/2200-0-0x000007FEF5DD3000-0x000007FEF5DD4000-memory.dmp

Filesize
4KB

Download
memory/2200-1-0x00000000010C0000-0x00000000013E4000-memory.dmp

Filesize
3.1MB

Download
memory/2200-2-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/2200-9-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/3044-8-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/3044-10-0x0000000000D10000-0x0000000001034000-memory.dmp

Filesize
3.1MB

Download
memory/3044-11-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

Filesize
9.9MB

Download
memory/3044-12-0x000007FEF5DD0000-0x000007FEF67BC000-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