quasar | b57a935934c95ee888778e0fd203efe1891db47663f15afc158779bd838e43c6

General

Target

c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe
Size

3.1MB
MD5

92c93c0f3d586d4f26865f78c91c7200
SHA1

acfaf4714bd8dc1f784275a8a513a1e4c1a2de12
SHA256

c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d
SHA512

9198dd61f07ec9ac01816c57c3925e16c65687df38aeeb8fa21c7e9aaa9a2011269a5023ac66fa4c0be2185744f530c38b618196db063acd1582e3cfcc460cb5
SSDEEP

49152:rv2I22SsaNYfdPBldt698dBcjHMkxNESEVk/iELoGdB7JTHHB72eh2NT:rvb22SsaNYfdPBldt6+dBcjHvxgK

Score

10^/10

quasar dp spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

DP

C2

xm.wintk.vip:1994

Mutex

09ae387c-a1cd-4bbc-a043-40c1658a6432

Attributes

encryption_key
9FE64C9ADDD7473DAA5F3B825BA5B87D261905EF
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 payload 3 IoCs

resource	yara_rule
behavioral1/memory/2136-0-0x0000000000E40000-0x0000000001164000-memory.dmp	family_quasar
behavioral1/files/0x00090000000141c0-6.dat	family_quasar
behavioral1/memory/3064-10-0x0000000000320000-0x0000000000644000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3064	Client.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	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

pid	Process
2824	schtasks.exe
1792	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2136	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe
Token: SeDebugPrivilege	3064	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3064	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 1792	2136	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe	28
PID 2136 wrote to memory of 1792	2136	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe	28
PID 2136 wrote to memory of 1792	2136	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe	28
PID 2136 wrote to memory of 3064	2136	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe	30
PID 2136 wrote to memory of 3064	2136	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe	30
PID 2136 wrote to memory of 3064	2136	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe	30
PID 3064 wrote to memory of 2824	3064	Client.exe	31
PID 3064 wrote to memory of 2824	3064	Client.exe	31
PID 3064 wrote to memory of 2824	3064	Client.exe	31

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\c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe
"C:\Users\Admin\AppData\Local\Temp\c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1792
- C:\Windows\system32\SubDir\Client.exe
  "C:\Windows\system32\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3064
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2824

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\Client.exe

Filesize
3.1MB

MD5
92c93c0f3d586d4f26865f78c91c7200

SHA1
acfaf4714bd8dc1f784275a8a513a1e4c1a2de12

SHA256
c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d

SHA512
9198dd61f07ec9ac01816c57c3925e16c65687df38aeeb8fa21c7e9aaa9a2011269a5023ac66fa4c0be2185744f530c38b618196db063acd1582e3cfcc460cb5

Download Submit
memory/2136-0-0x0000000000E40000-0x0000000001164000-memory.dmp

Filesize
3.1MB

Download
memory/2136-1-0x000007FEF61B0000-0x000007FEF6B9C000-memory.dmp

Filesize
9.9MB

Download
memory/2136-2-0x0000000000BD0000-0x0000000000C50000-memory.dmp

Filesize
512KB

Download
memory/2136-8-0x000007FEF61B0000-0x000007FEF6B9C000-memory.dmp

Filesize
9.9MB

Download
memory/3064-9-0x000007FEF61B0000-0x000007FEF6B9C000-memory.dmp

Filesize
9.9MB

Download
memory/3064-10-0x0000000000320000-0x0000000000644000-memory.dmp

Filesize
3.1MB

Download
memory/3064-11-0x000000001B3C0000-0x000000001B440000-memory.dmp

Filesize
512KB

Download
memory/3064-12-0x000007FEF61B0000-0x000007FEF6B9C000-memory.dmp

Filesize
9.9MB

Download
memory/3064-13-0x000000001B3C0000-0x000000001B440000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads