quasar | d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-10-2024 01:47

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General

Target

d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe
Size

3.3MB
MD5

e089ca24836249976e2d5dca3678e807
SHA1

8cf9c018fc37aa609b08d49de20e9856b643305b
SHA256

d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f
SHA512

76173c832baf4f003f7a2242b1daa8e4021320040de84125d1796c8b67dc2582b607efa77d386db38f6eda5dec892c9fc947b1930695d14687391537aa060f5a
SSDEEP

49152:pvPI22SsaNYfdPBldt698dBcjHkxOEMk8k/JxpoGdCYTHHB72eh2NTf:pvA22SsaNYfdPBldt6+dBcjHkxnby

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

173.214.167.207:4782

Mutex

feefbbd1-f830-4abb-beee-ba55da8cb629

Attributes

encryption_key
51CB1F5A5C66153C4F993F7F3638B35B3A7597B3
install_name
DefenderScan.exe
log_directory
init
reconnect_delay
3000
startup_key
Defender
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/2376-1-0x0000000001130000-0x000000000147C000-memory.dmp	family_quasar
behavioral1/files/0x0009000000015db6-5.dat	family_quasar
behavioral1/memory/1404-8-0x0000000000290000-0x00000000005DC000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1404	DefenderScan.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2376	d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe
Token: SeDebugPrivilege	1404	DefenderScan.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1404	DefenderScan.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 1404	2376	d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe	31
PID 2376 wrote to memory of 1404	2376	d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe	31
PID 2376 wrote to memory of 1404	2376	d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe	31

C:\Users\Admin\AppData\Local\Temp\d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe
"C:\Users\Admin\AppData\Local\Temp\d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Users\Admin\AppData\Roaming\SubDir\DefenderScan.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\DefenderScan.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1404

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

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

Filesize
3.3MB

MD5
e089ca24836249976e2d5dca3678e807

SHA1
8cf9c018fc37aa609b08d49de20e9856b643305b

SHA256
d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f

SHA512
76173c832baf4f003f7a2242b1daa8e4021320040de84125d1796c8b67dc2582b607efa77d386db38f6eda5dec892c9fc947b1930695d14687391537aa060f5a

Download Submit
memory/1404-7-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/1404-8-0x0000000000290000-0x00000000005DC000-memory.dmp

Filesize
3.3MB

Download
memory/1404-9-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/1404-11-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/1404-12-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2376-0-0x000007FEF58D3000-0x000007FEF58D4000-memory.dmp

Filesize
4KB

Download
memory/2376-1-0x0000000001130000-0x000000000147C000-memory.dmp

Filesize
3.3MB

Download
memory/2376-2-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download
memory/2376-10-0x000007FEF58D0000-0x000007FEF62BC000-memory.dmp

Filesize
9.9MB

Download