quasar | 7f3c5bf53129adfeb789c38f8dabda4b997545ad6a92d85cd1cb43a47e4417b2

General

Target

SeronObf.exe
Size

3.1MB
MD5

44177e3bdbc790c06a268a02dced77c4
SHA1

13578ac3ea2bb995f6f846a27ca82de1b3186db7
SHA256

7f3c5bf53129adfeb789c38f8dabda4b997545ad6a92d85cd1cb43a47e4417b2
SHA512

790e3ad20b45c6233453b9ca00e4939e6c6dcf966d276c66843ce5dbf60400cfb4df77933d77de97f2aab3d40c5a4c5a6fdc2af36ae2cac2af67789589021bc7
SSDEEP

98304:kIDq/kB9hLn7+YOBqJaQbmOsAdcpLrQVv3N:TDvZLn7+YOsMQbBQrm

Score

10^/10

quasar seron discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Seron

C2

nigeboc465-58875.portmap.host:58875

Mutex

eb8602ec-8a0d-4322-b9a0-544571be5a2d

Attributes

encryption_key
8BD9150EEC3DA71ED82080D7AEB7C165A58C889F
install_name
f8mk7ZGwVUpulm.exe
log_directory
Logs
reconnect_delay
3000
startup_key
f8mk7ZGwVUpulm
subdirectory
SubDir

Signatures

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

Quasar payload 5 IoCs

resource	yara_rule
behavioral1/memory/2324-17-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2324-15-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2324-9-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2324-10-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/2324-13-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2764	f8mk7ZGwVUpulm.exe

Loads dropped DLL 1 IoCs

pid	Process
2324	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2992 set thread context of 2324	2992	SeronObf.exe	30

System Location Discovery: System Language Discovery 1 TTPs 4 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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f8mk7ZGwVUpulm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SeronObf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2860	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2324	RegAsm.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2992 wrote to memory of 2324	2992	SeronObf.exe	30
PID 2324 wrote to memory of 2860	2324	RegAsm.exe	31
PID 2324 wrote to memory of 2860	2324	RegAsm.exe	31
PID 2324 wrote to memory of 2860	2324	RegAsm.exe	31
PID 2324 wrote to memory of 2860	2324	RegAsm.exe	31
PID 2324 wrote to memory of 2764	2324	RegAsm.exe	33
PID 2324 wrote to memory of 2764	2324	RegAsm.exe	33
PID 2324 wrote to memory of 2764	2324	RegAsm.exe	33
PID 2324 wrote to memory of 2764	2324	RegAsm.exe	33

C:\Users\Admin\AppData\Local\Temp\SeronObf.exe
"C:\Users\Admin\AppData\Local\Temp\SeronObf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2992
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "f8mk7ZGwVUpulm" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2860
- - C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe
    "C:\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2764

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

\Users\Admin\AppData\Roaming\SubDir\f8mk7ZGwVUpulm.exe

Filesize
63KB

MD5
b58b926c3574d28d5b7fdd2ca3ec30d5

SHA1
d260c4ffd603a9cfc057fcb83d678b1cecdf86f9

SHA256
6e70b56d748c4ccab13cc8a055d3795ea0dd95fe3b70568d7d3ac0c6621140a3

SHA512
b13cb998822b716b695013bcd6dec62a2290567d0d1743b2d982ca084235cf69c6ea1fc91c9d4e62657c6f9e102c7c60e81296ab055ffe43b887c5f8ec8958ab

Download Submit
memory/2324-13-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2324-17-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2324-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2324-8-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2324-9-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2324-6-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2324-10-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2324-15-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/2764-26-0x00000000000C0000-0x00000000000D2000-memory.dmp

Filesize
72KB

Download
memory/2992-5-0x0000000005010000-0x0000000005338000-memory.dmp

Filesize
3.2MB

Download
memory/2992-2-0x00000000744D0000-0x0000000074BBE000-memory.dmp

Filesize
6.9MB

Download
memory/2992-4-0x00000000744D0000-0x0000000074BBE000-memory.dmp

Filesize
6.9MB

Download
memory/2992-0-0x00000000744DE000-0x00000000744DF000-memory.dmp

Filesize
4KB

Download
memory/2992-3-0x00000000744DE000-0x00000000744DF000-memory.dmp

Filesize
4KB

Download
memory/2992-18-0x00000000744D0000-0x0000000074BBE000-memory.dmp

Filesize
6.9MB

Download
memory/2992-1-0x00000000009A0000-0x0000000000CC8000-memory.dmp

Filesize
3.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads