quasar | 1df46d513e053da3765c3b5572fda399872f69f734a8eaf9345948a6331eefa1

General

Target

executablelol.exe
Size

3.1MB
MD5

7aa529f2db5a30ed1b868c90e872ec57
SHA1

f384f3c375411eea2c72cdc15c6252102535656a
SHA256

1df46d513e053da3765c3b5572fda399872f69f734a8eaf9345948a6331eefa1
SHA512

404f3ba56677f362129b8352f0585e13f86e8f6a6570ca1deaed9551f01fea43b523d0318e314d5d99b371a2c44ac8ed9a4dae19788b10df325147b17d0a2120
SSDEEP

49152:avht62XlaSFNWPjljiFa2RoUYIb3RJ6PbR3LoGdarTHHB72eh2NT:avL62XlaSFNWPjljiFXRoUYIb3RJ6h

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/2520-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016115-6.dat	family_quasar
behavioral1/memory/1812-9-0x0000000001050000-0x0000000001374000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1812	Client.exe

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

Web Service

T1102

flow	ioc
2	0.tcp.us-cal-1.ngrok.io
16	0.tcp.us-cal-1.ngrok.io
29	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
2408	schtasks.exe
2708	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2520	executablelol.exe
Token: SeDebugPrivilege	1812	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1812	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1812	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1812	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2520 wrote to memory of 2408	2520	executablelol.exe	30
PID 2520 wrote to memory of 2408	2520	executablelol.exe	30
PID 2520 wrote to memory of 2408	2520	executablelol.exe	30
PID 2520 wrote to memory of 1812	2520	executablelol.exe	32
PID 2520 wrote to memory of 1812	2520	executablelol.exe	32
PID 2520 wrote to memory of 1812	2520	executablelol.exe	32
PID 1812 wrote to memory of 2708	1812	Client.exe	33
PID 1812 wrote to memory of 2708	1812	Client.exe	33
PID 1812 wrote to memory of 2708	1812	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\executablelol.exe
"C:\Users\Admin\AppData\Local\Temp\executablelol.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2520
- 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:2408
- 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:1812
- - 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:2708

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
7aa529f2db5a30ed1b868c90e872ec57

SHA1
f384f3c375411eea2c72cdc15c6252102535656a

SHA256
1df46d513e053da3765c3b5572fda399872f69f734a8eaf9345948a6331eefa1

SHA512
404f3ba56677f362129b8352f0585e13f86e8f6a6570ca1deaed9551f01fea43b523d0318e314d5d99b371a2c44ac8ed9a4dae19788b10df325147b17d0a2120

Download Submit
memory/1812-9-0x0000000001050000-0x0000000001374000-memory.dmp

Filesize
3.1MB

Download
memory/1812-11-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

Filesize
9.9MB

Download
memory/1812-10-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

Filesize
9.9MB

Download
memory/1812-12-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-0-0x000007FEF4FC3000-0x000007FEF4FC4000-memory.dmp

Filesize
4KB

Download
memory/2520-1-0x0000000000CB0000-0x0000000000FD4000-memory.dmp

Filesize
3.1MB

Download
memory/2520-2-0x000007FEF4FC0000-0x000007FEF59AC000-memory.dmp

Filesize
9.9MB

Download
memory/2520-8-0x000007FEF4FC0000-0x000007FEF59AC000-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