quasar | bdbc5164ef806974456f579200541d7c84f643377c86b0bc3c1081ddd1317146

General

Target

JaffaCakes118_6f5376f20c7f474f5554222d01456849.exe
Size

2.6MB
MD5

6f5376f20c7f474f5554222d01456849
SHA1

4931b9dc0767c76dc31e3e6c4423a961c0f51d86
SHA256

bdbc5164ef806974456f579200541d7c84f643377c86b0bc3c1081ddd1317146
SHA512

3c0510afbd1b076889491f7e177e03cd7e73b1debd1c416765bf18890e916a504376af7b04923ee233d78e08124f0d89fc60ca4dcc256ca44adffa87b83a59e0
SSDEEP

49152:/wp1l+eJkrb/TmvO90dL3BmAFd4A64nsfJPbcgTR55IX9fz1:/w1xY9P

Score

10^/10

quasar com surrogate spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

COM Surrogate

C2

10.8.1.66:8869

Mutex

119b9028-5664-4725-b2c1-1e4eaf743d68

Attributes

encryption_key
B0092D1E1BA8BCBB825AA0760094E03D6D52E169
install_name
3388.exe
log_directory
COMLogs
reconnect_delay
5000
startup_key
COM Surrogate

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/files/0x000e0000000122ed-2.dat	family_quasar
behavioral1/memory/2772-5-0x0000000000130000-0x00000000001B4000-memory.dmp	family_quasar
behavioral1/memory/2680-13-0x00000000010E0000-0x0000000001164000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

pid	Process
2772	go-memexec-4226582821.exe
2680	3388.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\system32\3388.exe	go-memexec-4226582821.exe
File opened for modification	C:\Windows\system32\3388.exe	go-memexec-4226582821.exe
File opened for modification	C:\Windows\system32\3388.exe	3388.exe

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
2688	schtasks.exe
532	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2772	go-memexec-4226582821.exe
Token: SeDebugPrivilege	2680	3388.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2680	3388.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2656 wrote to memory of 2772	2656	JaffaCakes118_6f5376f20c7f474f5554222d01456849.exe	32
PID 2656 wrote to memory of 2772	2656	JaffaCakes118_6f5376f20c7f474f5554222d01456849.exe	32
PID 2656 wrote to memory of 2772	2656	JaffaCakes118_6f5376f20c7f474f5554222d01456849.exe	32
PID 2772 wrote to memory of 2688	2772	go-memexec-4226582821.exe	33
PID 2772 wrote to memory of 2688	2772	go-memexec-4226582821.exe	33
PID 2772 wrote to memory of 2688	2772	go-memexec-4226582821.exe	33
PID 2772 wrote to memory of 2680	2772	go-memexec-4226582821.exe	35
PID 2772 wrote to memory of 2680	2772	go-memexec-4226582821.exe	35
PID 2772 wrote to memory of 2680	2772	go-memexec-4226582821.exe	35
PID 2680 wrote to memory of 532	2680	3388.exe	36
PID 2680 wrote to memory of 532	2680	3388.exe	36
PID 2680 wrote to memory of 532	2680	3388.exe	36

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\JaffaCakes118_6f5376f20c7f474f5554222d01456849.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6f5376f20c7f474f5554222d01456849.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2656
- C:\Users\Admin\AppData\Local\Temp\go-memexec-4226582821.exe
  C:\Users\Admin\AppData\Local\Temp\go-memexec-4226582821.exe
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2772
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "COM Surrogate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\go-memexec-4226582821.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2688
- - C:\Windows\system32\3388.exe
    "C:\Windows\system32\3388.exe"
    3⤵
    - Executes dropped EXE
    - Drops file in System32 directory
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2680
  - - C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "COM Surrogate" /sc ONLOGON /tr "C:\Windows\system32\3388.exe" /rl HIGHEST /f
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:532

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\go-memexec-4226582821.exe

Filesize
502KB

MD5
e49e8745bb3748c02b6991155ef988f9

SHA1
13ce804a8d4dd951b5535ceb819be3f04372f375

SHA256
9e105120064cd753917b8f60a20dedc1d5c33156189afdcc514189b07d23587e

SHA512
f7b514a905ba52970f5c17bd91e12a07ebd3e3715d3b5c59284c8f09ea7e4da317fd3968a46b164e520757de9567bd0ef36f0b0bed79e7aacd412032322a416d

Download Submit
memory/2680-11-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2680-13-0x00000000010E0000-0x0000000001164000-memory.dmp

Filesize
528KB

Download
memory/2680-14-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2680-15-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2772-4-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

Filesize
4KB

Download
memory/2772-5-0x0000000000130000-0x00000000001B4000-memory.dmp

Filesize
528KB

Download
memory/2772-6-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2772-12-0x000007FEF5EE0000-0x000007FEF68CC000-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