quasar | 757424386cb9f3c986cca5b9fe3ccc296443f8edb6cbdf5caedc82b13f5e9b2d

Analysis

max time kernel
126s
max time network
136s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
07-11-2024 02:03

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General

Target

Client-built2.exe
Size

3.1MB
MD5

846c5e39a589ac955d24e6a944df12be
SHA1

d78d21301b7f10833ce356e254dcbff43ca987e4
SHA256

757424386cb9f3c986cca5b9fe3ccc296443f8edb6cbdf5caedc82b13f5e9b2d
SHA512

facb7b046dced81e50f110c60da7bf48dd526cbda93a20157fa2c15206b7c59d68cf428ebcdc3df2b93545117c89003cee8d0bf72f11ed1aa376c864d943219b
SSDEEP

49152:avQt62XlaSFNWPjljiFa2RoUYIVpRJ6ebR3LoGde8THHB72eh2NT:avc62XlaSFNWPjljiFXRoUYIVpRJ6Y

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.0.0.97:4782

Mutex

925f6110-6db0-4053-8833-f663c97c5e70

Attributes

encryption_key
A9E8D8AB807B81C2D0B67F9752CFAF0AA688C5D0
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/1736-1-0x0000000000240000-0x0000000000564000-memory.dmp	family_quasar
behavioral1/files/0x000900000001755b-6.dat	family_quasar
behavioral1/memory/580-8-0x00000000013D0000-0x00000000016F4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
580	Client.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	1736	Client-built2.exe
Token: SeDebugPrivilege	580	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
580	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
580	Client.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 580	1736	Client-built2.exe	31
PID 1736 wrote to memory of 580	1736	Client-built2.exe	31
PID 1736 wrote to memory of 580	1736	Client-built2.exe	31

C:\Users\Admin\AppData\Local\Temp\Client-built2.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built2.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:580

C:\Windows\explorer.exe
"C:\Windows\explorer.exe"
1⤵
PID:2152

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

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Downloads

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

Filesize
3.1MB

MD5
846c5e39a589ac955d24e6a944df12be

SHA1
d78d21301b7f10833ce356e254dcbff43ca987e4

SHA256
757424386cb9f3c986cca5b9fe3ccc296443f8edb6cbdf5caedc82b13f5e9b2d

SHA512
facb7b046dced81e50f110c60da7bf48dd526cbda93a20157fa2c15206b7c59d68cf428ebcdc3df2b93545117c89003cee8d0bf72f11ed1aa376c864d943219b

Download Submit
memory/580-7-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

Filesize
9.9MB

Download
memory/580-8-0x00000000013D0000-0x00000000016F4000-memory.dmp

Filesize
3.1MB

Download
memory/580-10-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

Filesize
9.9MB

Download
memory/580-11-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

Filesize
9.9MB

Download
memory/1736-0-0x000007FEF5CB3000-0x000007FEF5CB4000-memory.dmp

Filesize
4KB

Download
memory/1736-1-0x0000000000240000-0x0000000000564000-memory.dmp

Filesize
3.1MB

Download
memory/1736-2-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

Filesize
9.9MB

Download
memory/1736-9-0x000007FEF5CB0000-0x000007FEF669C000-memory.dmp

Filesize
9.9MB

Download