quasar | dbd3b7317e7aeab2a126c46a2b688c7a68fcc0e1d8f5ed7e011dd3eca80cc50c

General

Target

99.exe
Size

3.1MB
MD5

4d354ddf83547df347c249ee10a01c6d
SHA1

bf1230df5257ba1db8ab7fbf357f01f545e999a2
SHA256

dbd3b7317e7aeab2a126c46a2b688c7a68fcc0e1d8f5ed7e011dd3eca80cc50c
SHA512

91771ab55252bf6edebe418d25bde4211302414d50303bb466b9dc1ec572f1b44fcb7ca0f16b48710165c0a6349cb653e795ade58ae9b168413f5ef82308e395
SSDEEP

49152:6vBt62XlaSFNWPjljiFa2RoUYIyD6x1JBLaGd1THHB72eh2NT:6vr62XlaSFNWPjljiFXRoUYIyD6r

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

2.tcp.us-cal-1.ngrok.io:14537

Mutex

0f60b981-1a45-472b-acf2-32d2fa49956b

Attributes

encryption_key
B3CE4ADBCFC896D87D5632035EB0E3D075AB14F9
install_name
LOGI_INT.exe
log_directory
Logs
reconnect_delay
3000
startup_key
LOGI_INT
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/604-1-0x0000000000BB0000-0x0000000000ED4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015fa6-6.dat	family_quasar
behavioral1/memory/2308-8-0x00000000001D0000-0x00000000004F4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

LOGI_INT.exe

pid	Process
2308	LOGI_INT.exe

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

Web Service

T1102

Processes:

flow	ioc
2	2.tcp.us-cal-1.ngrok.io
17	2.tcp.us-cal-1.ngrok.io
33	2.tcp.us-cal-1.ngrok.io

Drops file in System32 directory 5 IoCs

Processes:

99.exeLOGI_INT.exe

description	ioc	Process
File created	C:\Windows\system32\SubDir\LOGI_INT.exe	99.exe
File opened for modification	C:\Windows\system32\SubDir\LOGI_INT.exe	99.exe
File opened for modification	C:\Windows\system32\SubDir	99.exe
File opened for modification	C:\Windows\system32\SubDir\LOGI_INT.exe	LOGI_INT.exe
File opened for modification	C:\Windows\system32\SubDir	LOGI_INT.exe

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

Processes:

schtasks.exeschtasks.exe

pid	Process
1668	schtasks.exe
2708	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

99.exeLOGI_INT.exe

description	pid	Process
Token: SeDebugPrivilege	604	99.exe
Token: SeDebugPrivilege	2308	LOGI_INT.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LOGI_INT.exe

pid	Process
2308	LOGI_INT.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

99.exeLOGI_INT.exe

description	pid	Process	procid_target
PID 604 wrote to memory of 1668	604	99.exe	31
PID 604 wrote to memory of 1668	604	99.exe	31
PID 604 wrote to memory of 1668	604	99.exe	31
PID 604 wrote to memory of 2308	604	99.exe	33
PID 604 wrote to memory of 2308	604	99.exe	33
PID 604 wrote to memory of 2308	604	99.exe	33
PID 2308 wrote to memory of 2708	2308	LOGI_INT.exe	34
PID 2308 wrote to memory of 2708	2308	LOGI_INT.exe	34
PID 2308 wrote to memory of 2708	2308	LOGI_INT.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\99.exe
"C:\Users\Admin\AppData\Local\Temp\99.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:604
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "LOGI_INT" /sc ONLOGON /tr "C:\Windows\system32\SubDir\LOGI_INT.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1668
- C:\Windows\system32\SubDir\LOGI_INT.exe
  "C:\Windows\system32\SubDir\LOGI_INT.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2308
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "LOGI_INT" /sc ONLOGON /tr "C:\Windows\system32\SubDir\LOGI_INT.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

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\LOGI_INT.exe

Filesize
3.1MB

MD5
4d354ddf83547df347c249ee10a01c6d

SHA1
bf1230df5257ba1db8ab7fbf357f01f545e999a2

SHA256
dbd3b7317e7aeab2a126c46a2b688c7a68fcc0e1d8f5ed7e011dd3eca80cc50c

SHA512
91771ab55252bf6edebe418d25bde4211302414d50303bb466b9dc1ec572f1b44fcb7ca0f16b48710165c0a6349cb653e795ade58ae9b168413f5ef82308e395

Download Submit
memory/604-0-0x000007FEF55F3000-0x000007FEF55F4000-memory.dmp

Filesize
4KB

Download
memory/604-1-0x0000000000BB0000-0x0000000000ED4000-memory.dmp

Filesize
3.1MB

Download
memory/604-2-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/604-9-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-8-0x00000000001D0000-0x00000000004F4000-memory.dmp

Filesize
3.1MB

Download
memory/2308-10-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-11-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-12-0x000007FEF55F0000-0x000007FEF5FDC000-memory.dmp

Filesize
9.9MB

Download
memory/2308-13-0x000007FEF55F0000-0x000007FEF5FDC000-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