quasar | a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35

General

Target

a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
Size

773KB
MD5

8fb841a089ce2c1c760ef67e5bde9a08
SHA1

9ba26c8f25a276a87175ae9eac909a8f4d97fd71
SHA256

a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35
SHA512

a16739df2c02ea5e2116e1f2283a0f57d0a57e52431fa746c3334df20fbb4e96db6d1c4c5ed47cb92cb491afcd170794a0b31bde1180cff13caaaa9be59aa8e4
SSDEEP

24576:yoYAPo8TjClMteQB+JRVK7Ys4r7eTBp7cE7qzuS:yJFQjI9m+c7FpBZ7Iu

Score

10^/10

quasar vtroy discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

VTROY

C2

31.13.224.12:61512

31.13.224.13:61513

Mutex

QSR_MUTEX_4Q2rJqiVyC7hohzbjx

Attributes

encryption_key
7Vp2dMCHrMjJthQ2Elyy
install_name
downloads.exe
log_directory
Logs
reconnect_delay
5000
startup_key
cssrse.exe
subdirectory
downloadupdates

Signatures

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

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2548-5-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Looks up external IP address via web service 1 IoCs

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

Processes:

flow	ioc
10	ip-api.com

Suspicious use of SetThreadContext 3 IoCs

Processes:

a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe

description	pid	Process	procid_target
PID 2392 set thread context of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 set thread context of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 set thread context of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89

Program crash 2 IoCs

Processes:

WerFault.exeWerFault.exe

pid	pid_target	Process	procid_target
2832	2940	WerFault.exe	88
944	712	WerFault.exe	99

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exea0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exea0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.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

Processes:

schtasks.exeschtasks.exe

pid	Process
2192	schtasks.exe
1632	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe

description	pid	Process
Token: SeDebugPrivilege	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe

description	pid	Process	procid_target
PID 2392 wrote to memory of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 wrote to memory of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 wrote to memory of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 wrote to memory of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 wrote to memory of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 wrote to memory of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 wrote to memory of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 wrote to memory of 2548	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	87
PID 2392 wrote to memory of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 wrote to memory of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 wrote to memory of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 wrote to memory of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 wrote to memory of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 wrote to memory of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 wrote to memory of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 wrote to memory of 2940	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	88
PID 2392 wrote to memory of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89
PID 2392 wrote to memory of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89
PID 2392 wrote to memory of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89
PID 2392 wrote to memory of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89
PID 2392 wrote to memory of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89
PID 2392 wrote to memory of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89
PID 2392 wrote to memory of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89
PID 2392 wrote to memory of 2440	2392	a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe	89

C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
"C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2392
- C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
  C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2548
- C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
  C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
  2⤵
  PID:2940
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 2940 -s 80
    3⤵
    - Program crash
    PID:2832
- C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
  C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2440
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "cssrse.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2192
- - C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe
    "C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe"
    3⤵
    PID:3604
  - - C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe
      C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe
      4⤵
      PID:1992
  - - C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe
      C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe
      4⤵
      PID:2244
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "cssrse.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe" /rl HIGHEST /f
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:1632
  - - C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe
      C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe
      4⤵
      PID:712
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 712 -s 12
        5⤵
        Program crash
        
        PID:944

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2940 -ip 2940
1⤵
PID:1472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 712 -ip 712
1⤵
PID:448

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35.exe.log

Filesize
522B

MD5
0f39d6b9afc039d81ff31f65cbf76826

SHA1
8356d04fe7bba2695d59b6caf5c59f58f3e1a6d8

SHA256
ea16b63ffd431ebf658b903710b6b3a9b8a2eb6814eee3a53b707a342780315d

SHA512
5bad54adb2e32717ef6275f49e2f101dd7e2011c9be14a32e5c29051e8a3f608cbd0b44ac4855ab21e790cb7a5d84c5f69de087074fd01b35259d34d07f5aaf9

Download Submit
C:\Users\Admin\AppData\Roaming\downloadupdates\downloads.exe

Filesize
773KB

MD5
8fb841a089ce2c1c760ef67e5bde9a08

SHA1
9ba26c8f25a276a87175ae9eac909a8f4d97fd71

SHA256
a0fb85dec00548f95f3db18f567bcb75a9a083eebb637be6c88c2d2bf05e2a35

SHA512
a16739df2c02ea5e2116e1f2283a0f57d0a57e52431fa746c3334df20fbb4e96db6d1c4c5ed47cb92cb491afcd170794a0b31bde1180cff13caaaa9be59aa8e4

Download Submit
memory/2244-34-0x0000000006EA0000-0x0000000006EAA000-memory.dmp

Filesize
40KB

Download
memory/2392-0-0x000000007493E000-0x000000007493F000-memory.dmp

Filesize
4KB

Download
memory/2392-1-0x0000000000020000-0x00000000000EA000-memory.dmp

Filesize
808KB

Download
memory/2392-2-0x0000000007030000-0x000000000711E000-memory.dmp

Filesize
952KB

Download
memory/2392-4-0x0000000004DE0000-0x0000000004E7C000-memory.dmp

Filesize
624KB

Download
memory/2392-3-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2392-12-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2440-18-0x0000000005400000-0x0000000005412000-memory.dmp

Filesize
72KB

Download
memory/2440-14-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2440-16-0x0000000004F30000-0x0000000004F96000-memory.dmp

Filesize
408KB

Download
memory/2440-13-0x0000000004FE0000-0x0000000005072000-memory.dmp

Filesize
584KB

Download
memory/2440-11-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2440-20-0x00000000062C0000-0x00000000062FC000-memory.dmp

Filesize
240KB

Download
memory/2440-25-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2548-10-0x00000000057B0000-0x0000000005D54000-memory.dmp

Filesize
5.6MB

Download
memory/2548-15-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2548-19-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2548-8-0x0000000074930000-0x00000000750E0000-memory.dmp

Filesize
7.7MB

Download
memory/2548-5-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads