quasar | 7dae1d89f38e6fd6cd87d4c6619573ac8c0140af985896ad553cac26edc3b78a

General

Target

Client-built.exe
Size

3.1MB
MD5

4154355d39cb3f7ec6be0222e2508773
SHA1

d1b57f612acddc4c59bf901a5bf74df5ade13280
SHA256

7dae1d89f38e6fd6cd87d4c6619573ac8c0140af985896ad553cac26edc3b78a
SHA512

1efcd1714c72d0569e579e3746b057bf076a31a655148e31d8366a74912be2b57e6d00dfa75e0e770de9cee6959383a5bda630abae20530425c39e63769ac49e
SSDEEP

49152:3vrI22SsaNYfdPBldt698dBcjHSv41mzpEoGdVHTHHB72eh2NT:3vU22SsaNYfdPBldt6+dBcjHK4b

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

lolimaginerattin24-26181.portmap.host:26181

Mutex

5322b71c-e6d1-4271-a40e-ed1736164335

Attributes

encryption_key
9C4EA8E0DF89BE6122CBCA3F1DCCDAE968F75366
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
msservice
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3108-0-0x00000000005B0000-0x00000000008D4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

564 Client.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/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1120 schtasks.exe
2680 schtasks.exe
Gathers network information 2 TTPs 9 IoCs
Uses commandline utility to view network configuration.

System Information Discovery
T1082

Command and Scripting Interpreter
T1059

Processes:

ipconfig.exeNETSTAT.EXENETSTAT.EXENETSTAT.EXEipconfig.exeNETSTAT.EXENETSTAT.EXENETSTAT.EXENETSTAT.EXE

pid process

1120 ipconfig.exe
4524 NETSTAT.EXE
2964 NETSTAT.EXE
3584 NETSTAT.EXE
4564 ipconfig.exe
2684 NETSTAT.EXE
4116 NETSTAT.EXE
2180 NETSTAT.EXE
3040 NETSTAT.EXE
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Client.exe

pid process

564 Client.exe

pid	process
564	Client.exe

pid	process
1120	schtasks.exe
2680	schtasks.exe

pid	process
1120	ipconfig.exe
4524	NETSTAT.EXE
2964	NETSTAT.EXE
3584	NETSTAT.EXE
4564	ipconfig.exe
2684	NETSTAT.EXE
4116	NETSTAT.EXE
2180	NETSTAT.EXE
3040	NETSTAT.EXE

pid	process
564	Client.exe

Suspicious use of AdjustPrivilegeToken 11 IoCs

Processes:

Client-built.exeClient.exeClient-built.exeClient-built.exeClient-built.exeNETSTAT.EXENETSTAT.EXENETSTAT.EXENETSTAT.EXENETSTAT.EXENETSTAT.EXE

description	pid	process
Token: SeDebugPrivilege	3108	Client-built.exe
Token: SeDebugPrivilege	564	Client.exe
Token: SeDebugPrivilege	4708	Client-built.exe
Token: SeDebugPrivilege	4780	Client-built.exe
Token: SeDebugPrivilege	2584	Client-built.exe
Token: SeDebugPrivilege	2684	NETSTAT.EXE
Token: SeDebugPrivilege	2180	NETSTAT.EXE
Token: SeDebugPrivilege	4524	NETSTAT.EXE
Token: SeDebugPrivilege	3040	NETSTAT.EXE
Token: SeDebugPrivilege	2964	NETSTAT.EXE
Token: SeDebugPrivilege	3584	NETSTAT.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

564 Client.exe

pid	process
564	Client.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

Client-built.exeClient.execmd.execmd.exe

description	pid	process	target process
PID 3108 wrote to memory of 1120	3108	Client-built.exe	schtasks.exe
PID 3108 wrote to memory of 1120	3108	Client-built.exe	schtasks.exe
PID 3108 wrote to memory of 564	3108	Client-built.exe	Client.exe
PID 3108 wrote to memory of 564	3108	Client-built.exe	Client.exe
PID 564 wrote to memory of 2680	564	Client.exe	schtasks.exe
PID 564 wrote to memory of 2680	564	Client.exe	schtasks.exe
PID 564 wrote to memory of 4452	564	Client.exe	cmd.exe
PID 564 wrote to memory of 4452	564	Client.exe	cmd.exe
PID 4452 wrote to memory of 1812	4452	cmd.exe	chcp.com
PID 4452 wrote to memory of 1812	4452	cmd.exe	chcp.com
PID 4452 wrote to memory of 1120	4452	cmd.exe	ipconfig.exe
PID 4452 wrote to memory of 1120	4452	cmd.exe	ipconfig.exe
PID 1616 wrote to memory of 4564	1616	cmd.exe	ipconfig.exe
PID 1616 wrote to memory of 4564	1616	cmd.exe	ipconfig.exe
PID 1616 wrote to memory of 2684	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 2684	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 4116	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 4116	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 2180	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 2180	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 4524	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 4524	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 3040	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 3040	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 2964	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 2964	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 3584	1616	cmd.exe	NETSTAT.EXE
PID 1616 wrote to memory of 3584	1616	cmd.exe	NETSTAT.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:3108

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "msservice" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1120

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:564

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "msservice" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2680

C:\Windows\SYSTEM32\cmd.exe
"cmd" /K CHCP 437
3⤵
- Suspicious use of WriteProcessMemory
PID:4452

C:\Windows\system32\chcp.com
CHCP 437
4⤵
PID:1812

C:\Windows\system32\ipconfig.exe
ipconfig
4⤵
- Gathers network information
PID:1120

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3044

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4708

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4780

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2584

C:\Windows\system32\cmd.exe
"C:\Windows\system32\cmd.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1616

C:\Windows\system32\ipconfig.exe
ipconfig
2⤵
- Gathers network information
PID:4564

C:\Windows\system32\NETSTAT.EXE
netstat /nbf
2⤵
- Gathers network information
- Suspicious use of AdjustPrivilegeToken
PID:2684

C:\Windows\system32\NETSTAT.EXE
netstat - ano
2⤵
- Gathers network information
PID:4116

C:\Windows\system32\NETSTAT.EXE
netstat -ano
2⤵
- Gathers network information
- Suspicious use of AdjustPrivilegeToken
PID:2180

C:\Windows\system32\NETSTAT.EXE
netstat -a
2⤵
- Gathers network information
- Suspicious use of AdjustPrivilegeToken
PID:4524

C:\Windows\system32\NETSTAT.EXE
netstat -b
2⤵
- Gathers network information
- Suspicious use of AdjustPrivilegeToken
PID:3040

C:\Windows\system32\NETSTAT.EXE
netstat -bn
2⤵
- Gathers network information
- Suspicious use of AdjustPrivilegeToken
PID:2964

C:\Windows\system32\NETSTAT.EXE
netstat -bno
2⤵
- Gathers network information
- Suspicious use of AdjustPrivilegeToken
PID:3584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

Scheduled Task/Job

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client-built.exe.log

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
4154355d39cb3f7ec6be0222e2508773

SHA1
d1b57f612acddc4c59bf901a5bf74df5ade13280

SHA256
7dae1d89f38e6fd6cd87d4c6619573ac8c0140af985896ad553cac26edc3b78a

SHA512
1efcd1714c72d0569e579e3746b057bf076a31a655148e31d8366a74912be2b57e6d00dfa75e0e770de9cee6959383a5bda630abae20530425c39e63769ac49e

Download Submit
memory/564-11-0x00007FF900190000-0x00007FF900C51000-memory.dmp

Filesize
10.8MB

Download
memory/564-9-0x00007FF900190000-0x00007FF900C51000-memory.dmp

Filesize
10.8MB

Download
memory/564-12-0x000000001C590000-0x000000001C5E0000-memory.dmp

Filesize
320KB

Download
memory/564-13-0x000000001C6A0000-0x000000001C752000-memory.dmp

Filesize
712KB

Download
memory/564-16-0x000000001D2D0000-0x000000001D7F8000-memory.dmp

Filesize
5.2MB

Download
memory/564-17-0x000000001C600000-0x000000001C612000-memory.dmp

Filesize
72KB

Download
memory/564-18-0x000000001C660000-0x000000001C69C000-memory.dmp

Filesize
240KB

Download
memory/564-21-0x00007FF900190000-0x00007FF900C51000-memory.dmp

Filesize
10.8MB

Download
memory/3108-2-0x00007FF900190000-0x00007FF900C51000-memory.dmp

Filesize
10.8MB

Download
memory/3108-10-0x00007FF900190000-0x00007FF900C51000-memory.dmp

Filesize
10.8MB

Download
memory/3108-1-0x00007FF900193000-0x00007FF900195000-memory.dmp

Filesize
8KB

Download
memory/3108-0-0x00000000005B0000-0x00000000008D4000-memory.dmp

Filesize
3.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads