quasar | 39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357

Analysis

max time kernel
87s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20230221-en
resource tags

arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
submitted
23/03/2023, 02:08

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General

Target
bKJ7.exe
Size 348KB
Sample230323-ckj9cach88
SHA256 39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357
MD5 7f515d05fb17932adbbcbd0c2aba18f1
SHA1 9220c765e0dd0e7fa30af6823f3f382ef12a5dde
SHA512 73e627f18d47eaa94151b40a4c3977985faef9196f78a070f22b1df61c5d849f549d81c1c57b48e17bb5b7544e650b21000aab307d8235f2f0486e2174a1d8f2
SSDEEP 6144:kg6bPXhLApfpvKhECGiwru41w8wbfb3EA+6sq5FLT4rN6:9mhApdKhEC8SOw8aQRCFLTo6
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

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 3 IoCs

resource	yara_rule
behavioral2/memory/5016-133-0x00000000002F0000-0x000000000034E000-memory.dmp	family_quasar
behavioral2/files/0x0008000000023145-144.dat	family_quasar
behavioral2/files/0x0008000000023145-143.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1512	ms configs.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
28	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
1580	schtasks.exe
4476	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5016	bKJ7.exe
Token: SeDebugPrivilege	1512	ms configs.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 4476	5016	bKJ7.exe	84
PID 5016 wrote to memory of 4476	5016	bKJ7.exe	84
PID 5016 wrote to memory of 4476	5016	bKJ7.exe	84
PID 5016 wrote to memory of 1512	5016	bKJ7.exe	86
PID 5016 wrote to memory of 1512	5016	bKJ7.exe	86
PID 5016 wrote to memory of 1512	5016	bKJ7.exe	86
PID 1512 wrote to memory of 1580	1512	ms configs.exe	87
PID 1512 wrote to memory of 1580	1512	ms configs.exe	87
PID 1512 wrote to memory of 1580	1512	ms configs.exe	87

C:\Users\Admin\AppData\Local\Temp\bKJ7.exe
"C:\Users\Admin\AppData\Local\Temp\bKJ7.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5016
- 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:4476
- 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:1512
- - 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:1580

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

ms configs.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\ms configs.exe
Size 348KB
SHA256 39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357
MD5 7f515d05fb17932adbbcbd0c2aba18f1
SHA1 9220c765e0dd0e7fa30af6823f3f382ef12a5dde
SHA512 73e627f18d47eaa94151b40a4c3977985faef9196f78a070f22b1df61c5d849f549d81c1c57b48e17bb5b7544e650b21000aab307d8235f2f0486e2174a1d8f2
SSDEEP 6144:kg6bPXhLApfpvKhECGiwru41w8wbfb3EA+6sq5FLT4rN6:9mhApdKhEC8SOw8aQRCFLTo6
MD5 SHA1 SHA512 SSDEEP

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ms configs.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\ms configs.exe
Size 348KB
SHA256 39dd5339fa37de30a494a9995744facb01ed2ed446d8c2041d4817000ee8f357
MD5 7f515d05fb17932adbbcbd0c2aba18f1
SHA1 9220c765e0dd0e7fa30af6823f3f382ef12a5dde
SHA512 73e627f18d47eaa94151b40a4c3977985faef9196f78a070f22b1df61c5d849f549d81c1c57b48e17bb5b7544e650b21000aab307d8235f2f0486e2174a1d8f2
SSDEEP 6144:kg6bPXhLApfpvKhECGiwru41w8wbfb3EA+6sq5FLT4rN6:9mhApdKhEC8SOw8aQRCFLTo6
MD5 SHA1 SHA512 SSDEEP

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memory/1512-146-0x0000000005800000-0x0000000005810000-memory.dmp

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memory/1512-147-0x0000000007030000-0x000000000703A000-memory.dmp

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memory/5016-133-0x00000000002F0000-0x000000000034E000-memory.dmp

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memory/5016-134-0x00000000053D0000-0x0000000005974000-memory.dmp

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memory/5016-135-0x0000000004E20000-0x0000000004EB2000-memory.dmp

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memory/5016-136-0x0000000004D10000-0x0000000004D20000-memory.dmp

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memory/5016-137-0x0000000004D20000-0x0000000004D86000-memory.dmp

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memory/5016-138-0x0000000005D30000-0x0000000005D42000-memory.dmp

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memory/5016-139-0x0000000006160000-0x000000000619C000-memory.dmp

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Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads