quasar | 20d04f59ad2423f155c9b1e2f54acf2b777437dc4143fdf22562f57a56df9101

Analysis

max time kernel
150s
max time network
142s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
22-10-2024 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

Processes:

resource	yara_rule
behavioral1/memory/2304-1-0x0000000001100000-0x000000000144C000-memory.dmp	family_quasar
behavioral1/files/0x0007000000016688-6.dat	family_quasar
behavioral1/memory/2500-7-0x00000000003C0000-0x000000000070C000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

DefenderScan.exe

pid	Process
2500	DefenderScan.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exeDefenderScan.exe

description	pid	Process
Token: SeDebugPrivilege	2304	d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe
Token: SeDebugPrivilege	2500	DefenderScan.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

DefenderScan.exe

pid	Process
2500	DefenderScan.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe

description	pid	Process	procid_target
PID 2304 wrote to memory of 2500	2304	d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe	31
PID 2304 wrote to memory of 2500	2304	d600758023374f78d58acafbcaf94af66ad203b28e22a305e2a9d53768b7030f.exe	31
PID 2304 wrote to memory of 2500	2304	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:2304
- 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:2500

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/2304-0-0x000007FEF5963000-0x000007FEF5964000-memory.dmp

Filesize
4KB

Download
memory/2304-1-0x0000000001100000-0x000000000144C000-memory.dmp

Filesize
3.3MB

Download
memory/2304-2-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/2304-10-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/2500-8-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/2500-7-0x00000000003C0000-0x000000000070C000-memory.dmp

Filesize
3.3MB

Download
memory/2500-9-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/2500-11-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download