quasar | a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723

General

Target

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Size

876KB
MD5

81cb7328f6e4c75fbbfbc328fdb21df0
SHA1

c086e182fb08a835e51125f0d997af0155d1d0a2
SHA256

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723
SHA512

7ea8623c8e17eac7b5451b69ffa5eb98888e7ffac6e1b00e1681881812bb9de308086ce01e2f65a32ba3f16bf20f2826fc55b5e159fc18a32a52191e82970a27
SSDEEP

12288:6COzWsvIDqNc4Gqu7x5BRd6CMWMpFY0wjTyE9OXcg6VpUoME4KN6eclg5QU:BOzxiqgjx5TddMWM0/83UDMTKgw

Score

10^/10

quasar aoy discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

AOY

C2

87.120.120.27:61540

127.0.0.1:61540

87.121.86.205:61541

Mutex

QSR_MUTEX_NOCv4TURf46HbVbxyc

Attributes

encryption_key
fVsndNhImy9VosyZSQbQ
install_name
updates.exe
log_directory
Logs
reconnect_delay
4000
startup_key
Windows Update
subdirectory
Windows

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/1808-9-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Executes dropped EXE 2 IoCs

Processes:

updates.exeupdates.exe

pid	Process
3004	updates.exe
540	updates.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.

Processes:

flow	ioc
14	ip-api.com

Suspicious use of SetThreadContext 2 IoCs

Processes:

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exeupdates.exe

description	pid	Process	procid_target
PID 1336 set thread context of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 3004 set thread context of 540	3004	updates.exe	91

System Location Discovery: System Language Discovery 1 TTPs 6 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:

updates.exeschtasks.exea1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exea1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exeschtasks.exeupdates.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	updates.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	updates.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
544	schtasks.exe
1740	schtasks.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exea1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exeupdates.exeupdates.exe

description	pid	Process
Token: SeDebugPrivilege	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Token: SeDebugPrivilege	1808	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
Token: SeDebugPrivilege	3004	updates.exe
Token: SeDebugPrivilege	540	updates.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exea1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exeupdates.exeupdates.exe

description	pid	Process	procid_target
PID 1336 wrote to memory of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 1336 wrote to memory of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 1336 wrote to memory of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 1336 wrote to memory of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 1336 wrote to memory of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 1336 wrote to memory of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 1336 wrote to memory of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 1336 wrote to memory of 1808	1336	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	83
PID 1808 wrote to memory of 1740	1808	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	87
PID 1808 wrote to memory of 1740	1808	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	87
PID 1808 wrote to memory of 1740	1808	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	87
PID 1808 wrote to memory of 3004	1808	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	89
PID 1808 wrote to memory of 3004	1808	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	89
PID 1808 wrote to memory of 3004	1808	a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe	89
PID 3004 wrote to memory of 540	3004	updates.exe	91
PID 3004 wrote to memory of 540	3004	updates.exe	91
PID 3004 wrote to memory of 540	3004	updates.exe	91
PID 3004 wrote to memory of 540	3004	updates.exe	91
PID 3004 wrote to memory of 540	3004	updates.exe	91
PID 3004 wrote to memory of 540	3004	updates.exe	91
PID 3004 wrote to memory of 540	3004	updates.exe	91
PID 3004 wrote to memory of 540	3004	updates.exe	91
PID 540 wrote to memory of 544	540	updates.exe	93
PID 540 wrote to memory of 544	540	updates.exe	93
PID 540 wrote to memory of 544	540	updates.exe	93

C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
"C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1336
- C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
  C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1808
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1740
- - C:\Users\Admin\AppData\Roaming\Windows\updates.exe
    "C:\Users\Admin\AppData\Roaming\Windows\updates.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3004
  - - C:\Users\Admin\AppData\Roaming\Windows\updates.exe
      C:\Users\Admin\AppData\Roaming\Windows\updates.exe
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:540
    - - C:\Windows\SysWOW64\schtasks.exe
        
        "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\updates.exe" /rl HIGHEST /f
        5⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:544

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\a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723N.exe.log

Filesize
706B

MD5
d95c58e609838928f0f49837cab7dfd2

SHA1
55e7139a1e3899195b92ed8771d1ca2c7d53c916

SHA256
0407c814aef0d62aec7fd39b7c2f614746f0d8ff41f8ef957736f520f14b0339

SHA512
405310b29a833604c6627063bfdcf055a197e01f633ef21da238f1a6415a02e21315d689b4a6669db23e82152bed6f3492afb60963e6b2a0e9bb2ac09a480b5d

Download Submit
C:\Users\Admin\AppData\Roaming\Windows\updates.exe

Filesize
876KB

MD5
81cb7328f6e4c75fbbfbc328fdb21df0

SHA1
c086e182fb08a835e51125f0d997af0155d1d0a2

SHA256
a1d508edff87a505a4349f82aa50ab3fe657a44e4a4613b0eb63d5e8d01b8723

SHA512
7ea8623c8e17eac7b5451b69ffa5eb98888e7ffac6e1b00e1681881812bb9de308086ce01e2f65a32ba3f16bf20f2826fc55b5e159fc18a32a52191e82970a27

Download Submit
memory/540-30-0x0000000006690000-0x000000000669A000-memory.dmp

Filesize
40KB

Download
memory/1336-3-0x0000000074B90000-0x0000000075340000-memory.dmp

Filesize
7.7MB

Download
memory/1336-4-0x0000000009160000-0x0000000009266000-memory.dmp

Filesize
1.0MB

Download
memory/1336-5-0x0000000009260000-0x00000000092FC000-memory.dmp

Filesize
624KB

Download
memory/1336-6-0x00000000098B0000-0x0000000009E54000-memory.dmp

Filesize
5.6MB

Download
memory/1336-7-0x0000000004C40000-0x0000000004CD2000-memory.dmp

Filesize
584KB

Download
memory/1336-8-0x0000000002550000-0x0000000002556000-memory.dmp

Filesize
24KB

Download
memory/1336-2-0x0000000002680000-0x0000000002686000-memory.dmp

Filesize
24KB

Download
memory/1336-0-0x0000000074B9E000-0x0000000074B9F000-memory.dmp

Filesize
4KB

Download
memory/1336-12-0x0000000074B90000-0x0000000075340000-memory.dmp

Filesize
7.7MB

Download
memory/1336-1-0x0000000000010000-0x00000000000F0000-memory.dmp

Filesize
896KB

Download
memory/1808-11-0x0000000074B90000-0x0000000075340000-memory.dmp

Filesize
7.7MB

Download
memory/1808-15-0x0000000006440000-0x0000000006452000-memory.dmp

Filesize
72KB

Download
memory/1808-16-0x0000000006AC0000-0x0000000006AFC000-memory.dmp

Filesize
240KB

Download
memory/1808-14-0x00000000057F0000-0x0000000005856000-memory.dmp

Filesize
408KB

Download
memory/1808-13-0x0000000074B90000-0x0000000075340000-memory.dmp

Filesize
7.7MB

Download
memory/1808-23-0x0000000074B90000-0x0000000075340000-memory.dmp

Filesize
7.7MB

Download
memory/1808-9-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/3004-21-0x0000000074B90000-0x0000000075340000-memory.dmp

Filesize
7.7MB

Download
memory/3004-24-0x0000000074B90000-0x0000000075340000-memory.dmp

Filesize
7.7MB

Download
memory/3004-29-0x0000000074B90000-0x0000000075340000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads