quasar | 4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3

General

Target

4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3.exe
Size

3.1MB
MD5

942d7d99678d584c4481278378741d51
SHA1

97efb624cfa34da0c5583e61a5982fd496de8e2d
SHA256

4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3
SHA512

0c1798628d5c90eaa6cf54277ab917408b5921e4f39ece0505510d9b7241df6748a365bc2a0a1cdaa24771f4ac56a9973a6515a0e32a14a66a9ed98c2871dfba
SSDEEP

49152:yvht62XlaSFNWPjljiFa2RoUYI4CZ1J5LoGdQPTHHB72eh2NT:yvL62XlaSFNWPjljiFXRoUYI4CT

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

4.tcp.us-cal-1.ngrok.io:18092

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/3968-1-0x0000000000CE0000-0x0000000001004000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c65-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1660	Client.exe

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

Web Service

T1102

flow	ioc
15	4.tcp.us-cal-1.ngrok.io
46	4.tcp.us-cal-1.ngrok.io
58	4.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
5000	schtasks.exe
1336	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3968	4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3.exe
Token: SeDebugPrivilege	1660	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1660	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1660	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1660	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3968 wrote to memory of 5000	3968	4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3.exe	83
PID 3968 wrote to memory of 5000	3968	4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3.exe	83
PID 3968 wrote to memory of 1660	3968	4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3.exe	85
PID 3968 wrote to memory of 1660	3968	4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3.exe	85
PID 1660 wrote to memory of 1336	1660	Client.exe	86
PID 1660 wrote to memory of 1336	1660	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\4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3.exe
"C:\Users\Admin\AppData\Local\Temp\4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3968
- 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:5000
- 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:1660
- - 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:1336

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
942d7d99678d584c4481278378741d51

SHA1
97efb624cfa34da0c5583e61a5982fd496de8e2d

SHA256
4119dedd1d6408f80505394a374cde76124a736913f958c878f54c16c98986e3

SHA512
0c1798628d5c90eaa6cf54277ab917408b5921e4f39ece0505510d9b7241df6748a365bc2a0a1cdaa24771f4ac56a9973a6515a0e32a14a66a9ed98c2871dfba

Download Submit
memory/1660-10-0x00007FFA81940000-0x00007FFA82401000-memory.dmp

Filesize
10.8MB

Download
memory/1660-11-0x00007FFA81940000-0x00007FFA82401000-memory.dmp

Filesize
10.8MB

Download
memory/1660-12-0x000000001CAF0000-0x000000001CB40000-memory.dmp

Filesize
320KB

Download
memory/1660-13-0x000000001CC00000-0x000000001CCB2000-memory.dmp

Filesize
712KB

Download
memory/1660-14-0x00007FFA81940000-0x00007FFA82401000-memory.dmp

Filesize
10.8MB

Download
memory/3968-0-0x00007FFA81943000-0x00007FFA81945000-memory.dmp

Filesize
8KB

Download
memory/3968-1-0x0000000000CE0000-0x0000000001004000-memory.dmp

Filesize
3.1MB

Download
memory/3968-2-0x00007FFA81940000-0x00007FFA82401000-memory.dmp

Filesize
10.8MB

Download
memory/3968-9-0x00007FFA81940000-0x00007FFA82401000-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