quasar | 282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd

General

Target

kreo q zi.7z
Size

922KB
MD5

ec516db688f94e98d5141f4bade557e9
SHA1

198ffbae5eed415ac673f5e371774759f1a53de1
SHA256

282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd
SHA512

ecc34ad7d15fbedbbc4e62b469f5e6e5e71099e19831574da61dc9f751ed5b2faad1676b8b3dbf0911c4dac628c7a15e9d07d953692c5ab1b700ea07f6396985
SSDEEP

24576:yScP7qLl4iGQATiKL0aywxTodSrUF+nVZLLymvgDoSAWcNtMXqWOU:07qLl4KATiJUo0UEnLmmvqiWcNtMXDOU

Score

10^/10

quasar office04 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

hola435-24858.portmap.host:24858

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
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 2 IoCs

Processes:

resource	yara_rule
behavioral1/files/0x0028000000045170-2.dat	family_quasar
behavioral1/memory/5116-5-0x0000000000E80000-0x00000000011A4000-memory.dmp	family_quasar

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

Client.exeClient.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1263212995-3575756360-1418101905-1000\Control Panel\International\Geo\Nation	Client.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1263212995-3575756360-1418101905-1000\Control Panel\International\Geo\Nation	Client.exe

Executes dropped EXE 3 IoCs

Processes:

kreo q zi.exeClient.exeClient.exe

pid	Process
5116	kreo q zi.exe
1268	Client.exe
4560	Client.exe

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

System Information Discovery
T1082

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

Processes:

PING.EXEPING.EXE

pid	Process
3232	PING.EXE
4624	PING.EXE

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

Processes:

PING.EXEPING.EXE

pid	Process
3232	PING.EXE
4624	PING.EXE

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid	Process
1060	schtasks.exe
1688	schtasks.exe
3636	schtasks.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

7zFM.exekreo q zi.exeClient.exeClient.exe

description	pid	Process
Token: SeRestorePrivilege	4704	7zFM.exe
Token: 35	4704	7zFM.exe
Token: SeSecurityPrivilege	4704	7zFM.exe
Token: SeDebugPrivilege	5116	kreo q zi.exe
Token: SeDebugPrivilege	1268	Client.exe
Token: SeDebugPrivilege	4560	Client.exe

Suspicious use of FindShellTrayWindow 2 IoCs

Processes:

7zFM.exe

pid	Process
4704	7zFM.exe
4704	7zFM.exe

Suspicious use of WriteProcessMemory 22 IoCs

Processes:

kreo q zi.exeClient.execmd.exeClient.execmd.exe

description	pid	Process	procid_target
PID 5116 wrote to memory of 3636	5116	kreo q zi.exe	95
PID 5116 wrote to memory of 3636	5116	kreo q zi.exe	95
PID 5116 wrote to memory of 1268	5116	kreo q zi.exe	97
PID 5116 wrote to memory of 1268	5116	kreo q zi.exe	97
PID 1268 wrote to memory of 1060	1268	Client.exe	98
PID 1268 wrote to memory of 1060	1268	Client.exe	98
PID 1268 wrote to memory of 2680	1268	Client.exe	100
PID 1268 wrote to memory of 2680	1268	Client.exe	100
PID 2680 wrote to memory of 3196	2680	cmd.exe	102
PID 2680 wrote to memory of 3196	2680	cmd.exe	102
PID 2680 wrote to memory of 4624	2680	cmd.exe	103
PID 2680 wrote to memory of 4624	2680	cmd.exe	103
PID 2680 wrote to memory of 4560	2680	cmd.exe	104
PID 2680 wrote to memory of 4560	2680	cmd.exe	104
PID 4560 wrote to memory of 1688	4560	Client.exe	105
PID 4560 wrote to memory of 1688	4560	Client.exe	105
PID 4560 wrote to memory of 4512	4560	Client.exe	107
PID 4560 wrote to memory of 4512	4560	Client.exe	107
PID 4512 wrote to memory of 532	4512	cmd.exe	109
PID 4512 wrote to memory of 532	4512	cmd.exe	109
PID 4512 wrote to memory of 3232	4512	cmd.exe	110
PID 4512 wrote to memory of 3232	4512	cmd.exe	110

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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\kreo q zi.7z"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:4704

C:\Users\Admin\Desktop\kreo q zi.exe
"C:\Users\Admin\Desktop\kreo q zi.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5116
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3636
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1268
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1060
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\jHR9oTefiHmM.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2680
  - - C:\Windows\system32\chcp.com
      chcp 65001
      4⤵
      PID:3196
  - - C:\Windows\system32\PING.EXE
      ping -n 10 localhost
      4⤵
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4624
  - - C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      4⤵
      Checks computer location settings
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4560
    - - C:\Windows\SYSTEM32\schtasks.exe
        
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        5⤵
        Scheduled Task/Job: Scheduled Task
        
        PID:1688
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\KEkssTL0BczZ.bat" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:4512
      - C:\Windows\system32\chcp.com
        
        chcp 65001
        6⤵
        
        PID:532
      - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        6⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:3232

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

Query Registry

2

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
7787ce173dfface746f5a9cf5477883d

SHA1
4587d870e914785b3a8fb017fec0c0f1c7ec0004

SHA256
c339149818fa8f9e5af4627715c3afe4f42bc1267df17d77a278d4c811ed8df1

SHA512
3a630053ae99114292f8cf8d45600f8fe72125795252bf76677663476bd2275be084a1af2fcb4ce30409ba1b5829b2b3ffb6795de46d2a703c3314017a86f1ff

Download Submit
C:\Users\Admin\AppData\Local\Temp\KEkssTL0BczZ.bat

Filesize
207B

MD5
70826f53030101dfca331363106dcd86

SHA1
5e136e3dd75b75ccaa6e5175e8d1f735640f0a25

SHA256
c57c5dff92d6d865bfc593403c4a6a79d35aa824e44b93c7c77a967b7eab29b1

SHA512
23128139f02130e563770f36126444419d48cfaf1c40286d7a96af7a1a88c929f6b43b5fb243a462272c709420dcf055457ddf9243e258351d02119ee513121d

Download Submit
C:\Users\Admin\AppData\Local\Temp\jHR9oTefiHmM.bat

Filesize
207B

MD5
cfe65757f8a706b228751e303596e7fd

SHA1
80871947d9c41d9a88a0fbb3438f0ccde8b6ac4c

SHA256
c7f289b7d444f110d964d13b173a1dd8c2bf0f51d1e701cf499cc17045719fcc

SHA512
2ce30f8d5deef9a490962d913d10bd8bc0b9d9892c676dbd7f3892faa133dd5782c655e275f569ae6a7721130b484a93dc11eb5c9e13caee8a83450f90a2e73f

Download Submit
C:\Users\Admin\Desktop\kreo q zi.exe

Filesize
3.1MB

MD5
28ac02fc40c8f1c2a8989ee3c09a1372

SHA1
b182758b62a1482142c0fce4be78c786e08b7025

SHA256
0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b

SHA512
2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767

Download Submit
memory/1268-10-0x00000000033A0000-0x00000000033F0000-memory.dmp

Filesize
320KB

Download
memory/1268-11-0x000000001D200000-0x000000001D2B2000-memory.dmp

Filesize
712KB

Download
memory/5116-4-0x00007FFF7F983000-0x00007FFF7F985000-memory.dmp

Filesize
8KB

Download
memory/5116-5-0x0000000000E80000-0x00000000011A4000-memory.dmp

Filesize
3.1MB

Download
memory/5116-6-0x00007FFF7F980000-0x00007FFF80442000-memory.dmp

Filesize
10.8MB

Download
memory/5116-9-0x00007FFF7F980000-0x00007FFF80442000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads