quasar | 39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357

General

Target

bKJ7.exe
Size

348KB
MD5

7f515d05fb17932adbbcbd0c2aba18f1
SHA1

9220c765e0dd0e7fa30af6823f3f382ef12a5dde
SHA256

39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357
SHA512

73e627f18d47eaa94151b40a4c3977985faef9196f78a070f22b1df61c5d849f549d81c1c57b48e17bb5b7544e650b21000aab307d8235f2f0486e2174a1d8f2
SSDEEP

6144:kg6bPXhLApfpvKhECGiwru41w8wbfb3EA+6sq5FLT4rN6:9mhApdKhEC8SOw8aQRCFLTo6

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

myhost88.ddns.net:4782

Mutex

QSR_MUTEX_kTcfswfSj43R2vlOKd

Attributes

encryption_key
QnUpxbEUVKL7JTeQ1Sc5
install_name
ms configs.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ms configs
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/1976-54-0x0000000000130000-0x000000000018E000-memory.dmp	family_quasar
behavioral1/files/0x000a000000012314-58.dat	family_quasar
behavioral1/files/0x000a000000012314-61.dat	family_quasar
behavioral1/files/0x000a000000012314-62.dat	family_quasar
behavioral1/memory/1100-63-0x0000000000E60000-0x0000000000EBE000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1100	ms configs.exe

Loads dropped DLL 1 IoCs

pid	Process
1976	bKJ7.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
1	ip-api.com

Creates scheduled task(s) 1 TTPs 2 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1544	schtasks.exe
1608	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1976	bKJ7.exe
Token: SeDebugPrivilege	1100	ms configs.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1976 wrote to memory of 1544	1976	bKJ7.exe	28
PID 1976 wrote to memory of 1544	1976	bKJ7.exe	28
PID 1976 wrote to memory of 1544	1976	bKJ7.exe	28
PID 1976 wrote to memory of 1544	1976	bKJ7.exe	28
PID 1976 wrote to memory of 1100	1976	bKJ7.exe	30
PID 1976 wrote to memory of 1100	1976	bKJ7.exe	30
PID 1976 wrote to memory of 1100	1976	bKJ7.exe	30
PID 1976 wrote to memory of 1100	1976	bKJ7.exe	30
PID 1100 wrote to memory of 1608	1100	ms configs.exe	31
PID 1100 wrote to memory of 1608	1100	ms configs.exe	31
PID 1100 wrote to memory of 1608	1100	ms configs.exe	31
PID 1100 wrote to memory of 1608	1100	ms configs.exe	31

C:\Users\Admin\AppData\Local\Temp\bKJ7.exe
"C:\Users\Admin\AppData\Local\Temp\bKJ7.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1976
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "ms configs" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\bKJ7.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1544
- C:\Users\Admin\AppData\Roaming\SubDir\ms configs.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\ms configs.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1100
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "ms configs" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\ms configs.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1608

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\ms configs.exe

Filesize
348KB

MD5
7f515d05fb17932adbbcbd0c2aba18f1

SHA1
9220c765e0dd0e7fa30af6823f3f382ef12a5dde

SHA256
39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357

SHA512
73e627f18d47eaa94151b40a4c3977985faef9196f78a070f22b1df61c5d849f549d81c1c57b48e17bb5b7544e650b21000aab307d8235f2f0486e2174a1d8f2

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\ms configs.exe

Filesize
348KB

MD5
7f515d05fb17932adbbcbd0c2aba18f1

SHA1
9220c765e0dd0e7fa30af6823f3f382ef12a5dde

SHA256
39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357

SHA512
73e627f18d47eaa94151b40a4c3977985faef9196f78a070f22b1df61c5d849f549d81c1c57b48e17bb5b7544e650b21000aab307d8235f2f0486e2174a1d8f2

Download Submit
\Users\Admin\AppData\Roaming\SubDir\ms configs.exe

Filesize
348KB

MD5
7f515d05fb17932adbbcbd0c2aba18f1

SHA1
9220c765e0dd0e7fa30af6823f3f382ef12a5dde

SHA256
39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357

SHA512
73e627f18d47eaa94151b40a4c3977985faef9196f78a070f22b1df61c5d849f549d81c1c57b48e17bb5b7544e650b21000aab307d8235f2f0486e2174a1d8f2

Download Submit
memory/1100-63-0x0000000000E60000-0x0000000000EBE000-memory.dmp

Filesize
376KB

Download
memory/1100-64-0x0000000004890000-0x00000000048D0000-memory.dmp

Filesize
256KB

Download
memory/1100-65-0x0000000004890000-0x00000000048D0000-memory.dmp

Filesize
256KB

Download
memory/1976-54-0x0000000000130000-0x000000000018E000-memory.dmp

Filesize
376KB

Download
memory/1976-55-0x0000000004220000-0x0000000004260000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads