quasar | 95aaca4f14c31d00d6b5d2b40d0dd13e4e8f47fe6bea49388119527f3700f597

Analysis

max time kernel
147s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
11-11-2024 15:46

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General

Target

monkey.exe
Size

3.1MB
MD5

9859a252dd5d39d77b4dbdc38d0e12bc
SHA1

dcb2d45e7bcdf20230a397d88badf2f27e0c3b54
SHA256

95aaca4f14c31d00d6b5d2b40d0dd13e4e8f47fe6bea49388119527f3700f597
SHA512

42973931e4dabdbef5a3d63d91641c86360e3422c842b178b1fd512f17963f1f0f25dee87b62183e132a2c7f431dc974718c4453cf53e7f002ebe17671a8bbe9
SSDEEP

49152:/vOI22SsaNYfdPBldt698dBcjHfzRJ6ibR3LoGdrBTHHB72eh2NT:/vj22SsaNYfdPBldt6+dBcjHfzRJ6c

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

255.255.255.0:4782

Mutex

5d8ed293-df10-4841-a52b-8692fbf47f38

Attributes

encryption_key
11B8D109A02D98C9240E47185440CD1BFD88612D
install_name
monkey.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/3040-1-0x0000000001070000-0x0000000001394000-memory.dmp	family_quasar
behavioral1/files/0x000e000000016df5-5.dat	family_quasar
behavioral1/memory/2712-8-0x00000000001A0000-0x00000000004C4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2712	monkey.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3040	monkey.exe
Token: SeDebugPrivilege	2712	monkey.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2712	monkey.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2712	monkey.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 3040 wrote to memory of 2712	3040	monkey.exe	31
PID 3040 wrote to memory of 2712	3040	monkey.exe	31
PID 3040 wrote to memory of 2712	3040	monkey.exe	31

C:\Users\Admin\AppData\Local\Temp\monkey.exe
"C:\Users\Admin\AppData\Local\Temp\monkey.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3040
- C:\Users\Admin\AppData\Roaming\SubDir\monkey.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\monkey.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
9859a252dd5d39d77b4dbdc38d0e12bc

SHA1
dcb2d45e7bcdf20230a397d88badf2f27e0c3b54

SHA256
95aaca4f14c31d00d6b5d2b40d0dd13e4e8f47fe6bea49388119527f3700f597

SHA512
42973931e4dabdbef5a3d63d91641c86360e3422c842b178b1fd512f17963f1f0f25dee87b62183e132a2c7f431dc974718c4453cf53e7f002ebe17671a8bbe9

Download Submit
memory/2712-8-0x00000000001A0000-0x00000000004C4000-memory.dmp

Filesize
3.1MB

Download
memory/2712-9-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2712-10-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2712-11-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/3040-0-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

Filesize
4KB

Download
memory/3040-1-0x0000000001070000-0x0000000001394000-memory.dmp

Filesize
3.1MB

Download
memory/3040-2-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/3040-7-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download