quasar | 22e0e3319b3a845ef2c6f8a5efdcb3612ba9561fcdf5c70b8e95cc26d959ff50

General

Target

wefudoneset.exe
Size

3.1MB
MD5

06838ba1d6af1ff162f4bf79e8f7e451
SHA1

1cf5196a0436fed50538a2bfef6cb14e1f8e30ed
SHA256

22e0e3319b3a845ef2c6f8a5efdcb3612ba9561fcdf5c70b8e95cc26d959ff50
SHA512

e87ca2bf97c7d4d1a4e0857d75a40bd30e009fafdbcd70a905f1818994afd3694abc6680f89c127b8d7a965dd12420d097ac1371da575cfe0872f303a1735c68
SSDEEP

49152:8d9yr29T0PwfnBP6RTgxLul5XHpTTHHB72eh2NT:8dC29TffnB1xLw

Score

10^/10

quasar 1321 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.0

Botnet

1321

C2

127.0.0.1:7000

Mutex

b8169f21-b1ab-4cdd-89e8-040d5b4d2b12

Attributes

encryption_key
14277F7D27CB958C695738C76EE5FBECE431CF60
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft
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
behavioral1/memory/3748-1-0x0000000000B10000-0x0000000000E34000-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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	wefudoneset.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2045521122-590294423-3465680274-1000\Control Panel\International\Geo\Nation	wefudoneset.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

pid	Process
1412	PING.EXE
2940	PING.EXE

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

pid	Process
1412	PING.EXE
2940	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3748	wefudoneset.exe
3748	wefudoneset.exe
2936	wefudoneset.exe
2936	wefudoneset.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3748	wefudoneset.exe
Token: SeDebugPrivilege	2936	wefudoneset.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3748 wrote to memory of 548	3748	wefudoneset.exe	83
PID 3748 wrote to memory of 548	3748	wefudoneset.exe	83
PID 548 wrote to memory of 3952	548	cmd.exe	85
PID 548 wrote to memory of 3952	548	cmd.exe	85
PID 548 wrote to memory of 1412	548	cmd.exe	86
PID 548 wrote to memory of 1412	548	cmd.exe	86
PID 548 wrote to memory of 2936	548	cmd.exe	89
PID 548 wrote to memory of 2936	548	cmd.exe	89
PID 2936 wrote to memory of 2528	2936	wefudoneset.exe	90
PID 2936 wrote to memory of 2528	2936	wefudoneset.exe	90
PID 2528 wrote to memory of 1512	2528	cmd.exe	92
PID 2528 wrote to memory of 1512	2528	cmd.exe	92
PID 2528 wrote to memory of 2940	2528	cmd.exe	93
PID 2528 wrote to memory of 2940	2528	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\wefudoneset.exe
"C:\Users\Admin\AppData\Local\Temp\wefudoneset.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3748
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\Olr7w6Nlpaiw.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:548
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:3952
- - C:\Windows\system32\PING.EXE
    ping -n 10 localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1412
- - C:\Users\Admin\AppData\Local\Temp\wefudoneset.exe
    "C:\Users\Admin\AppData\Local\Temp\wefudoneset.exe"
    3⤵
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2936
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\hEC6gOhGCXAt.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2528
    - - C:\Windows\system32\chcp.com
        
        chcp 65001
        5⤵
        
        PID:1512
    - - C:\Windows\system32\PING.EXE
        
        ping -n 10 localhost
        5⤵
        System Network Configuration Discovery: Internet Connection Discovery
        Runs ping.exe
        
        PID:2940

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

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

Replay Monitor

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Downloads

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

Filesize
1KB

MD5
baf55b95da4a601229647f25dad12878

SHA1
abc16954ebfd213733c4493fc1910164d825cac8

SHA256
ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924

SHA512
24f502fedb1a305d0d7b08857ffc1db9b2359ff34e06d5748ecc84e35c985f29a20d9f0a533bea32d234ab37097ec0481620c63b14ac89b280e75e14d19fd545

Download Submit
C:\Users\Admin\AppData\Local\Temp\Olr7w6Nlpaiw.bat

Filesize
208B

MD5
cfdcb91cdb5462cd3231237176cbd657

SHA1
d2710c848e6ca756f9ca283cb164d14d02a9336b

SHA256
50483ef65787ba026951317b7c69db2a9bcac13862a3f8dda94018c4301e146f

SHA512
ca52777782d947f4c626250ff3d32e24710c6f2e70376a4244c169f5cd2bacd1101304b612488d554b6d75e5fd8b566c60f7a40f5ed9d1960cb26b5dc3f9c810

Download Submit
C:\Users\Admin\AppData\Local\Temp\hEC6gOhGCXAt.bat

Filesize
208B

MD5
30f31f44c0d76b555d0be7c7f2251982

SHA1
e7043c72d2d2ae0dd47de2fa9b1a1d706cf9f0d5

SHA256
accc4cf0bfdedfdbd4731921e32f28875bd6720796b2dcace9443c602985fb9f

SHA512
4aaf4606a0b358a5e0195430daebc805e1a552a7272942301693452af4e4194e875cad463d3c564c0ec2be88ef36f9744260773a342f9d26c56c38490fc4f54f

Download Submit
memory/2936-10-0x00007FF873670000-0x00007FF874131000-memory.dmp

Filesize
10.8MB

Download
memory/2936-11-0x00007FF873670000-0x00007FF874131000-memory.dmp

Filesize
10.8MB

Download
memory/2936-15-0x00007FF873670000-0x00007FF874131000-memory.dmp

Filesize
10.8MB

Download
memory/3748-0-0x00007FF8739D3000-0x00007FF8739D5000-memory.dmp

Filesize
8KB

Download
memory/3748-1-0x0000000000B10000-0x0000000000E34000-memory.dmp

Filesize
3.1MB

Download
memory/3748-2-0x00007FF8739D0000-0x00007FF874491000-memory.dmp

Filesize
10.8MB

Download
memory/3748-7-0x00007FF8739D0000-0x00007FF874491000-memory.dmp

Filesize
10.8MB

Download

Analysis

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