quasar | 0f89689dce10772f4f7ad3c2431ec808fd53a40a93314a2a22ef1b63eb21b37b

General

Target

7u45745967.exe
Size

3.1MB
MD5

dadd4502cec83146bc01bd9e01e9e4ad
SHA1

c7c7def14dd5f15e92a4227be4c5ad3af175a2ca
SHA256

0f89689dce10772f4f7ad3c2431ec808fd53a40a93314a2a22ef1b63eb21b37b
SHA512

4d25597282663c033eadafc755ad2e1f6c6700a601ea0f64f7a8922c41be2aeba3f3d5479a904ed0461ad51ffc3256963b0fbb5c9f8b366a94767b218ef08f8f
SSDEEP

49152:GvBt62XlaSFNWPjljiFa2RoUYIioxNESEek/isLoGdI5THHB72eh2NT:Gvr62XlaSFNWPjljiFXRoUYINx1y

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:11073

Mutex

5ef8baaf-b402-47aa-8c01-abb78e86878b

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 3 IoCs

resource	yara_rule
behavioral1/memory/1800-1-0x00000000001D0000-0x00000000004F4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016c47-6.dat	family_quasar
behavioral1/memory/2104-10-0x0000000000C30000-0x0000000000F54000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2104	LOGI_INT.exe

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

Web Service

T1102

flow	ioc
2	4.tcp.us-cal-1.ngrok.io

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir\LOGI_INT.exe	7u45745967.exe
File opened for modification	C:\Windows\system32\SubDir	7u45745967.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
File created	C:\Windows\system32\SubDir\LOGI_INT.exe	7u45745967.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

pid	Process
2224	schtasks.exe
828	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1800	7u45745967.exe
Token: SeDebugPrivilege	2104	LOGI_INT.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2104	LOGI_INT.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1800 wrote to memory of 828	1800	7u45745967.exe	30
PID 1800 wrote to memory of 828	1800	7u45745967.exe	30
PID 1800 wrote to memory of 828	1800	7u45745967.exe	30
PID 1800 wrote to memory of 2104	1800	7u45745967.exe	32
PID 1800 wrote to memory of 2104	1800	7u45745967.exe	32
PID 1800 wrote to memory of 2104	1800	7u45745967.exe	32
PID 2104 wrote to memory of 2224	2104	LOGI_INT.exe	33
PID 2104 wrote to memory of 2224	2104	LOGI_INT.exe	33
PID 2104 wrote to memory of 2224	2104	LOGI_INT.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\7u45745967.exe
"C:\Users\Admin\AppData\Local\Temp\7u45745967.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1800
- 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:828
- 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:2104
- - 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:2224

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
dadd4502cec83146bc01bd9e01e9e4ad

SHA1
c7c7def14dd5f15e92a4227be4c5ad3af175a2ca

SHA256
0f89689dce10772f4f7ad3c2431ec808fd53a40a93314a2a22ef1b63eb21b37b

SHA512
4d25597282663c033eadafc755ad2e1f6c6700a601ea0f64f7a8922c41be2aeba3f3d5479a904ed0461ad51ffc3256963b0fbb5c9f8b366a94767b218ef08f8f

Download Submit
memory/1800-0-0x000007FEF5903000-0x000007FEF5904000-memory.dmp

Filesize
4KB

Download
memory/1800-1-0x00000000001D0000-0x00000000004F4000-memory.dmp

Filesize
3.1MB

Download
memory/1800-2-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/1800-8-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2104-9-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2104-10-0x0000000000C30000-0x0000000000F54000-memory.dmp

Filesize
3.1MB

Download
memory/2104-11-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2104-12-0x000007FEF5900000-0x000007FEF62EC000-memory.dmp

Filesize
9.9MB

Download
memory/2104-13-0x000007FEF5900000-0x000007FEF62EC000-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