quasar | 1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14ca

General

Target

1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe
Size

4.2MB
MD5

3cc22c210a4508dd03a02a8072633a90
SHA1

5ebf943c456a386d6e7736770f14d3b53440ace2
SHA256

1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14ca
SHA512

5207b064bfd1b07a9a08234e18ae12923ae83e26d2d5bb41683d418cd0d94198847847f707c386b3a8c8576c2e5ab994672dfb2c3e7bf251b3067d30fa44a352
SSDEEP

24576:DJwau91PHKWGydL38EqXKzr2gduRXFzP5AtTQpFX+m5fi69fffZctAv7vIjOvtXJ:9mdj09Mg9wcWRVpuIRMV

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

10.0.2.10:4782

Mutex

5e88c20b-b195-4047-9b1c-7f8d48b72752

Attributes

encryption_key
54E2D6E30589DDFD447DFA1043FAA166C85E85DA
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/468-5-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 916 set thread context of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83

System Location Discovery: System Language Discovery 1 TTPs 2 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	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe
916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe
Token: SeDebugPrivilege	468	InstallUtil.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
468	InstallUtil.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
468	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 916 wrote to memory of 4224	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	82
PID 916 wrote to memory of 4224	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	82
PID 916 wrote to memory of 4224	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	82
PID 916 wrote to memory of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83
PID 916 wrote to memory of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83
PID 916 wrote to memory of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83
PID 916 wrote to memory of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83
PID 916 wrote to memory of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83
PID 916 wrote to memory of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83
PID 916 wrote to memory of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83
PID 916 wrote to memory of 468	916	1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe	83

C:\Users\Admin\AppData\Local\Temp\1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe
"C:\Users\Admin\AppData\Local\Temp\1ab78e4debf0e9739c8d342516ce64be08aefc62e4338119eaed632646dc14caN.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:916
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  PID:4224
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/468-10-0x00000000054E0000-0x00000000054EA000-memory.dmp

Filesize
40KB

Download
memory/468-9-0x0000000074EB0000-0x0000000075660000-memory.dmp

Filesize
7.7MB

Download
memory/468-14-0x0000000074EB0000-0x0000000075660000-memory.dmp

Filesize
7.7MB

Download
memory/468-13-0x0000000006730000-0x00000000067E2000-memory.dmp

Filesize
712KB

Download
memory/468-12-0x00000000064D0000-0x0000000006520000-memory.dmp

Filesize
320KB

Download
memory/468-5-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/468-8-0x0000000074EB0000-0x0000000075660000-memory.dmp

Filesize
7.7MB

Download
memory/468-7-0x0000000005340000-0x00000000053D2000-memory.dmp

Filesize
584KB

Download
memory/468-11-0x0000000006940000-0x0000000006F58000-memory.dmp

Filesize
6.1MB

Download
memory/916-0-0x0000000074EBE000-0x0000000074EBF000-memory.dmp

Filesize
4KB

Download
memory/916-1-0x0000000000B80000-0x0000000000B8C000-memory.dmp

Filesize
48KB

Download
memory/916-4-0x0000000002F60000-0x0000000002F6A000-memory.dmp

Filesize
40KB

Download
memory/916-3-0x0000000005630000-0x00000000056CC000-memory.dmp

Filesize
624KB

Download
memory/916-2-0x0000000005BE0000-0x0000000006184000-memory.dmp

Filesize
5.6MB

Download

Analysis

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