quasar | cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
08-12-2024 02:17

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General

Target

cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe
Size

3.1MB
MD5

8529f16047a929e78e1445e1e8da6420
SHA1

069c98c62f10746b59e81074566064c12af98538
SHA256

cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05
SHA512

dba5ce8694126ad36f0b32df10f0e91bccd9df74f79ad74d96b5fc27f5bbeafc3bafe8f5033d63bbf9cf762610508dc4558179b89747f1f82dd5797eb3e2845a
SSDEEP

49152:Gv2I22SsaNYfdPBldt698dBcjHm0RJ6bbR3LoGdrUNTHHB72eh2NT:Gvb22SsaNYfdPBldt6+dBcjHm0RJ6t

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.178:4782

Mutex

e3145a54-7071-437b-a36d-3b059a61f596

Attributes

encryption_key
428267984771B58D55BD3263A25F8163757BE0E6
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/2068-1-0x0000000000A00000-0x0000000000D24000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016d3e-7.dat	family_quasar
behavioral1/memory/1576-8-0x00000000000A0000-0x00000000003C4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1576	Client.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir	cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	Client.exe
File opened for modification	C:\Windows\system32\SubDir	Client.exe
File created	C:\Windows\system32\SubDir\Client.exe	cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2068	cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe
Token: SeDebugPrivilege	1576	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1576	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2068 wrote to memory of 1576	2068	cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe	31
PID 2068 wrote to memory of 1576	2068	cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe	31
PID 2068 wrote to memory of 1576	2068	cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe	31

C:\Users\Admin\AppData\Local\Temp\cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe
"C:\Users\Admin\AppData\Local\Temp\cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05N.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2068
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1576

Network

MITRE ATT&CK Matrix

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Downloads

C:\Windows\system32\SubDir\Client.exe

Filesize
3.1MB

MD5
8529f16047a929e78e1445e1e8da6420

SHA1
069c98c62f10746b59e81074566064c12af98538

SHA256
cf6b625bec7ef296682b936125d3be8ca84f33294bf9b6f732f0a1f898de9a05

SHA512
dba5ce8694126ad36f0b32df10f0e91bccd9df74f79ad74d96b5fc27f5bbeafc3bafe8f5033d63bbf9cf762610508dc4558179b89747f1f82dd5797eb3e2845a

Download Submit
memory/1576-8-0x00000000000A0000-0x00000000003C4000-memory.dmp

Filesize
3.1MB

Download
memory/1576-10-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/1576-11-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/1576-12-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2068-0-0x000007FEF5B63000-0x000007FEF5B64000-memory.dmp

Filesize
4KB

Download
memory/2068-1-0x0000000000A00000-0x0000000000D24000-memory.dmp

Filesize
3.1MB

Download
memory/2068-2-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2068-9-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download