quasar | 3a4eaaf270fece850ea5fde3dbb2f9951e67b0651cb7bab1d6fa8c509ee03597

General

Target

5t2363223623312sdsafgdf.exe
Size

3.1MB
MD5

74fcf7ab924850fe95eed572e75a8e91
SHA1

ad8da638e83f9953b74b74b7e0f5cd3fc91b5309
SHA256

3a4eaaf270fece850ea5fde3dbb2f9951e67b0651cb7bab1d6fa8c509ee03597
SHA512

722cc4c7a8472dd4b8f733b4a5da9a8ffa2af319c673be3f1788307d13ff2c6498c865edac9ddbf21cf500dfcb185e5d6c16c59d0d2d379a3e92b366f06d75f6
SSDEEP

49152:+vBt62XlaSFNWPjljiFa2RoUYIwxDE/gHk/JxBoGddOTHHB72eh2NT:+vr62XlaSFNWPjljiFXRoUYIwxQL

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:10025

Mutex

093ad4d0-ac96-49ac-a21d-e2ecfcdc257f

Attributes

encryption_key
64E5F426F36D28C0743F6DA157D86F7805E54413
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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/5008-1-0x00000000000A0000-0x00000000003C4000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c9b-8.dat	family_quasar

Executes dropped EXE 1 IoCs

Processes:

LOGI_INT.exe

pid	Process
5044	LOGI_INT.exe

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

Web Service

T1102

Processes:

flow	ioc
13	0.tcp.us-cal-1.ngrok.io
49	0.tcp.us-cal-1.ngrok.io
80	0.tcp.us-cal-1.ngrok.io

Drops file in System32 directory 5 IoCs

Processes:

5t2363223623312sdsafgdf.exeLOGI_INT.exe

description	ioc	Process
File created	C:\Windows\system32\SubDir\LOGI_INT.exe	5t2363223623312sdsafgdf.exe
File opened for modification	C:\Windows\system32\SubDir\LOGI_INT.exe	5t2363223623312sdsafgdf.exe
File opened for modification	C:\Windows\system32\SubDir	5t2363223623312sdsafgdf.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
3036	schtasks.exe
2284	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

5t2363223623312sdsafgdf.exeLOGI_INT.exe

description	pid	Process
Token: SeDebugPrivilege	5008	5t2363223623312sdsafgdf.exe
Token: SeDebugPrivilege	5044	LOGI_INT.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LOGI_INT.exe

pid	Process
5044	LOGI_INT.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

5t2363223623312sdsafgdf.exeLOGI_INT.exe

description	pid	Process	procid_target
PID 5008 wrote to memory of 3036	5008	5t2363223623312sdsafgdf.exe	87
PID 5008 wrote to memory of 3036	5008	5t2363223623312sdsafgdf.exe	87
PID 5008 wrote to memory of 5044	5008	5t2363223623312sdsafgdf.exe	89
PID 5008 wrote to memory of 5044	5008	5t2363223623312sdsafgdf.exe	89
PID 5044 wrote to memory of 2284	5044	LOGI_INT.exe	90
PID 5044 wrote to memory of 2284	5044	LOGI_INT.exe	90

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\5t2363223623312sdsafgdf.exe
"C:\Users\Admin\AppData\Local\Temp\5t2363223623312sdsafgdf.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5008
- 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:3036
- 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:5044
- - 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:2284

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
74fcf7ab924850fe95eed572e75a8e91

SHA1
ad8da638e83f9953b74b74b7e0f5cd3fc91b5309

SHA256
3a4eaaf270fece850ea5fde3dbb2f9951e67b0651cb7bab1d6fa8c509ee03597

SHA512
722cc4c7a8472dd4b8f733b4a5da9a8ffa2af319c673be3f1788307d13ff2c6498c865edac9ddbf21cf500dfcb185e5d6c16c59d0d2d379a3e92b366f06d75f6

Download Submit
memory/5008-0-0x00007FFEF1223000-0x00007FFEF1225000-memory.dmp

Filesize
8KB

Download
memory/5008-1-0x00000000000A0000-0x00000000003C4000-memory.dmp

Filesize
3.1MB

Download
memory/5008-2-0x00007FFEF1220000-0x00007FFEF1CE1000-memory.dmp

Filesize
10.8MB

Download
memory/5008-10-0x00007FFEF1220000-0x00007FFEF1CE1000-memory.dmp

Filesize
10.8MB

Download
memory/5044-9-0x00007FFEF1220000-0x00007FFEF1CE1000-memory.dmp

Filesize
10.8MB

Download
memory/5044-11-0x00007FFEF1220000-0x00007FFEF1CE1000-memory.dmp

Filesize
10.8MB

Download
memory/5044-12-0x000000001C1F0000-0x000000001C240000-memory.dmp

Filesize
320KB

Download
memory/5044-13-0x000000001C300000-0x000000001C3B2000-memory.dmp

Filesize
712KB

Download
memory/5044-14-0x00007FFEF1220000-0x00007FFEF1CE1000-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