quasar | d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae

Analysis

max time kernel
100s
max time network
112s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-12-2024 22:47

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General

Target

d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae.exe
Size

3.1MB
MD5

dc13a9db7bdae006b2121de14f75a72d
SHA1

92e117d9439d38c89d9d18dd97ce8c99aa82d768
SHA256

d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae
SHA512

c2b3f0c8d383bda1e527cdb3f2e9db8f8604dd65bd965d50b2ffd13b76facd3cdc99d0e6241aed4b1531671ca834b5c1bd1cdfbcfdfe83aa1924e7af8d432518
SSDEEP

49152:rvDI22SsaNYfdPBldt698dBcjHJwRJ6/bR3LoGdkTHHB72eh2NTk:rv822SsaNYfdPBldt6+dBcjHJwRJ6RC

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.74:4782

Mutex

b4ad83f8-b608-477d-8395-2274bcaab6d1

Attributes

encryption_key
62EF51244AF3535A6A9C77206CD89D5BFECD7E4E
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/1916-1-0x0000000000220000-0x0000000000544000-memory.dmp	family_quasar
behavioral1/files/0x00060000000191fd-6.dat	family_quasar
behavioral1/memory/2628-10-0x0000000000050000-0x0000000000374000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2628	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae.exe
Token: SeDebugPrivilege	2628	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2628	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 2628	1916	d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae.exe	31
PID 1916 wrote to memory of 2628	1916	d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae.exe	31
PID 1916 wrote to memory of 2628	1916	d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae.exe	31

C:\Users\Admin\AppData\Local\Temp\d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae.exe
"C:\Users\Admin\AppData\Local\Temp\d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1916
- 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 SetWindowsHookEx
  PID:2628

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
dc13a9db7bdae006b2121de14f75a72d

SHA1
92e117d9439d38c89d9d18dd97ce8c99aa82d768

SHA256
d97c64a7f16a9ea4375d8b9a876735933c220b8f9c60a180b494102a0054c4ae

SHA512
c2b3f0c8d383bda1e527cdb3f2e9db8f8604dd65bd965d50b2ffd13b76facd3cdc99d0e6241aed4b1531671ca834b5c1bd1cdfbcfdfe83aa1924e7af8d432518

Download Submit
memory/1916-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/1916-1-0x0000000000220000-0x0000000000544000-memory.dmp

Filesize
3.1MB

Download
memory/1916-2-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/1916-8-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2628-10-0x0000000000050000-0x0000000000374000-memory.dmp

Filesize
3.1MB

Download
memory/2628-9-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2628-11-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2628-12-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download