quasar | a5d114be9a4e5f601a6d855b25b7e206d60f55f9a605ad1c8ebafd964fa1ed70

General

Target

Client-built.exe
Size

3.1MB
MD5

59821db4fc3efdd9d78185a16efa5917
SHA1

9a53b49c3e42a83e6833c0da4107bae862b4d6b9
SHA256

a5d114be9a4e5f601a6d855b25b7e206d60f55f9a605ad1c8ebafd964fa1ed70
SHA512

d3d0f978a50edbe669b68ece5ba183b75bcfa701185370682227501daf643ee08fa22f7e540f00c604459f986b73e11601401c11ed48b8f50ed5fe848af4fd29
SSDEEP

49152:0v/t62XlaSFNWPjljiFa2RoUYI+ZyP+vEVTHHB72eh2NT:0vV62XlaSFNWPjljiFXRoUYI+Zi

Score

10^/10

quasar bob681 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Bob681

C2

181.215.176.73:59955

Mutex

4a19a6ac-9ac6-4cbd-ab2f-1e469ebe93aa

Attributes

encryption_key
01A024E271E79DC5F555EC503C0E2AB6090246F2
install_name
repl.exe
log_directory
Logs
reconnect_delay
3000
startup_key
replstart
subdirectory
repl

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4596-133-0x0000000000B30000-0x0000000000E4A000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\repl\repl.exe	family_quasar
C:\Users\Admin\AppData\Roaming\repl\repl.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

repl.exe

pid process

4732 repl.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

taskmgr.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName	taskmgr.exe

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

Processes:

schtasks.exeschtasks.exe

pid process

1532 schtasks.exe
1784 schtasks.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

taskmgr.exe

pid process

1140 taskmgr.exe
1140 taskmgr.exe
1140 taskmgr.exe
1140 taskmgr.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

taskmgr.exe

pid process

1140 taskmgr.exe

pid	process
1532	schtasks.exe
1784	schtasks.exe

pid	process
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe

pid	process
1140	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

Client-built.exerepl.exetaskmgr.exe

description	pid	process
Token: SeDebugPrivilege	4596	Client-built.exe
Token: SeDebugPrivilege	4732	repl.exe
Token: SeDebugPrivilege	1140	taskmgr.exe
Token: SeSystemProfilePrivilege	1140	taskmgr.exe
Token: SeCreateGlobalPrivilege	1140	taskmgr.exe

Suspicious use of FindShellTrayWindow 16 IoCs

Processes:

repl.exetaskmgr.exe

pid	process
4732	repl.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe

Suspicious use of SendNotifyMessage 16 IoCs

Processes:

repl.exetaskmgr.exe

pid	process
4732	repl.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe
1140	taskmgr.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Client-built.exerepl.exe

description	pid	process	target process
PID 4596 wrote to memory of 1532	4596	Client-built.exe	schtasks.exe
PID 4596 wrote to memory of 1532	4596	Client-built.exe	schtasks.exe
PID 4596 wrote to memory of 4732	4596	Client-built.exe	repl.exe
PID 4596 wrote to memory of 4732	4596	Client-built.exe	repl.exe
PID 4732 wrote to memory of 1784	4732	repl.exe	schtasks.exe
PID 4732 wrote to memory of 1784	4732	repl.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4596

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "replstart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\repl\repl.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1532

C:\Users\Admin\AppData\Roaming\repl\repl.exe
"C:\Users\Admin\AppData\Roaming\repl\repl.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4732

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "replstart" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\repl\repl.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:1784

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1140

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

2

T1082

Query Registry

2

T1012

Peripheral Device Discovery

1

T1120

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\repl\repl.exe
Filesize
3.1MB

MD5
59821db4fc3efdd9d78185a16efa5917

SHA1
9a53b49c3e42a83e6833c0da4107bae862b4d6b9

SHA256
a5d114be9a4e5f601a6d855b25b7e206d60f55f9a605ad1c8ebafd964fa1ed70

SHA512
d3d0f978a50edbe669b68ece5ba183b75bcfa701185370682227501daf643ee08fa22f7e540f00c604459f986b73e11601401c11ed48b8f50ed5fe848af4fd29

Download Submit
C:\Users\Admin\AppData\Roaming\repl\repl.exe
Filesize
3.1MB

MD5
59821db4fc3efdd9d78185a16efa5917

SHA1
9a53b49c3e42a83e6833c0da4107bae862b4d6b9

SHA256
a5d114be9a4e5f601a6d855b25b7e206d60f55f9a605ad1c8ebafd964fa1ed70

SHA512
d3d0f978a50edbe669b68ece5ba183b75bcfa701185370682227501daf643ee08fa22f7e540f00c604459f986b73e11601401c11ed48b8f50ed5fe848af4fd29

Download Submit
memory/1140-152-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-153-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-157-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-155-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-156-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-154-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-145-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-146-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-147-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/1140-151-0x000001E133240000-0x000001E133241000-memory.dmp

Filesize
4KB

Download
memory/4596-133-0x0000000000B30000-0x0000000000E4A000-memory.dmp

Filesize
3.1MB

Download
memory/4596-134-0x0000000002E50000-0x0000000002E60000-memory.dmp

Filesize
64KB

Download
memory/4732-144-0x0000000001290000-0x00000000012A0000-memory.dmp

Filesize
64KB

Download
memory/4732-143-0x000000001C360000-0x000000001C412000-memory.dmp

Filesize
712KB

Download
memory/4732-142-0x000000001C250000-0x000000001C2A0000-memory.dmp

Filesize
320KB

Download
memory/4732-141-0x0000000001290000-0x00000000012A0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads