quasar | dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
18-12-2024 03:29

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General

Target

dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b.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/2032-1-0x0000000000060000-0x0000000000384000-memory.dmp	family_quasar
behavioral1/files/0x000800000001919c-6.dat	family_quasar
behavioral1/memory/328-8-0x00000000009C0000-0x0000000000CE4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
328	Client.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b.exe
Token: SeDebugPrivilege	328	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
328	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 328	2032	dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b.exe	30
PID 2032 wrote to memory of 328	2032	dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b.exe	30
PID 2032 wrote to memory of 328	2032	dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b.exe	30

C:\Users\Admin\AppData\Local\Temp\dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b.exe
"C:\Users\Admin\AppData\Local\Temp\dc4e60715160d270d5b34204c0ef1f947a94d71eccc4b01111bfce0af6debf3b.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032
- 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:328

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/328-8-0x00000000009C0000-0x0000000000CE4000-memory.dmp

Filesize
3.1MB

Download
memory/328-10-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/328-11-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/328-12-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2032-0-0x000007FEF5EA3000-0x000007FEF5EA4000-memory.dmp

Filesize
4KB

Download
memory/2032-1-0x0000000000060000-0x0000000000384000-memory.dmp

Filesize
3.1MB

Download
memory/2032-2-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download
memory/2032-9-0x000007FEF5EA0000-0x000007FEF688C000-memory.dmp

Filesize
9.9MB

Download