quasar | 611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7

General

Target

jignesh.exe
Size

3.1MB
MD5

64da51697ac726c1e27f5d7899c89cac
SHA1

29f336e761644ff1bd932d5649b5275fd7fd79b3
SHA256

611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7
SHA512

a4a123f0787b23a29c77ae6a3baa348cddbfe8b0232d0562982874462f49cf3ec4066356837780be8b3b516d640049b47e4cfea0e0659e37beed8f2265d92751
SSDEEP

49152:Wvht62XlaSFNWPjljiFa2RoUYISURJ6jbR3LoGddTHHB72eh2NT:WvL62XlaSFNWPjljiFXRoUYISURJ6V

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

98.51.190.130:20

Mutex

11bbf22e-826e-486b-b024-adbd86228a9e

Attributes

encryption_key
7A589EDBC6A581E125BF830EF0D05FC74BB75E30
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ctfmon
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/2344-1-0x00000000009C0000-0x0000000000CE4000-memory.dmp	family_quasar
behavioral1/files/0x000f000000016d3f-6.dat	family_quasar
behavioral1/memory/2956-10-0x00000000011A0000-0x00000000014C4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2956	Client.exe

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

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2140	schtasks.exe
2564	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2344	jignesh.exe
Token: SeDebugPrivilege	2956	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2956	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2956	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2956	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2344 wrote to memory of 2140	2344	jignesh.exe	29
PID 2344 wrote to memory of 2140	2344	jignesh.exe	29
PID 2344 wrote to memory of 2140	2344	jignesh.exe	29
PID 2344 wrote to memory of 2956	2344	jignesh.exe	31
PID 2344 wrote to memory of 2956	2344	jignesh.exe	31
PID 2344 wrote to memory of 2956	2344	jignesh.exe	31
PID 2956 wrote to memory of 2564	2956	Client.exe	32
PID 2956 wrote to memory of 2564	2956	Client.exe	32
PID 2956 wrote to memory of 2564	2956	Client.exe	32

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\jignesh.exe
"C:\Users\Admin\AppData\Local\Temp\jignesh.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2344
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2140
- 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
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2956
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "ctfmon" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

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
64da51697ac726c1e27f5d7899c89cac

SHA1
29f336e761644ff1bd932d5649b5275fd7fd79b3

SHA256
611f6deadda658b042a6636e5e69c381fa65ed5cab95d2e8f5e43c285ed3cfc7

SHA512
a4a123f0787b23a29c77ae6a3baa348cddbfe8b0232d0562982874462f49cf3ec4066356837780be8b3b516d640049b47e4cfea0e0659e37beed8f2265d92751

Download Submit
memory/2344-0-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

Filesize
4KB

Download
memory/2344-1-0x00000000009C0000-0x0000000000CE4000-memory.dmp

Filesize
3.1MB

Download
memory/2344-2-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2344-8-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2956-9-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2956-10-0x00000000011A0000-0x00000000014C4000-memory.dmp

Filesize
3.1MB

Download
memory/2956-11-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2956-12-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2956-13-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads