quasar | dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-12-2024 06:44

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General

Target

local.exe
Size

3.1MB
MD5

ef27ef58c0f84cbcbbc4655dedbf4de0
SHA1

2d22660414046a0ed5f9ce19e0aa64fb1942b335
SHA256

dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b
SHA512

f703ca5c85d10ae8fc5d5ddc259d034df3845f20a8709eab3eea54fe99d7fec5866cfa406c8d0c1bb475ef00cc4aecbba6b963ab510938a9a768811b11083d9b
SSDEEP

49152:rvDI22SsaNYfdPBldt698dBcjHJwRJ6/bR3LoGdkTHHB72eh2NT:rv822SsaNYfdPBldt6+dBcjHJwRJ6R

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/2516-1-0x0000000000070000-0x0000000000394000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015cc0-6.dat	family_quasar
behavioral1/memory/656-10-0x0000000001230000-0x0000000001554000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
656	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2516	local.exe
Token: SeDebugPrivilege	656	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
656	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2516 wrote to memory of 656	2516	local.exe	30
PID 2516 wrote to memory of 656	2516	local.exe	30
PID 2516 wrote to memory of 656	2516	local.exe	30

C:\Users\Admin\AppData\Local\Temp\local.exe
"C:\Users\Admin\AppData\Local\Temp\local.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2516
- 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:656

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
ef27ef58c0f84cbcbbc4655dedbf4de0

SHA1
2d22660414046a0ed5f9ce19e0aa64fb1942b335

SHA256
dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b

SHA512
f703ca5c85d10ae8fc5d5ddc259d034df3845f20a8709eab3eea54fe99d7fec5866cfa406c8d0c1bb475ef00cc4aecbba6b963ab510938a9a768811b11083d9b

Download Submit
memory/656-9-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/656-10-0x0000000001230000-0x0000000001554000-memory.dmp

Filesize
3.1MB

Download
memory/656-11-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/656-12-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/2516-0-0x000007FEF5DE3000-0x000007FEF5DE4000-memory.dmp

Filesize
4KB

Download
memory/2516-1-0x0000000000070000-0x0000000000394000-memory.dmp

Filesize
3.1MB

Download
memory/2516-2-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download
memory/2516-8-0x000007FEF5DE0000-0x000007FEF67CC000-memory.dmp

Filesize
9.9MB

Download