quasar | 544627888509e1cd5a081d030af835f7d7eac014284b606d808cb506b59b1cbe

General

Target

FlashingSoftwarePRO.exe
Size

3.1MB
MD5

abefc9e52207f52bf0c9f6bc69916d23
SHA1

303af0cd029199d8a95ce1a708eb9887e63b73f4
SHA256

544627888509e1cd5a081d030af835f7d7eac014284b606d808cb506b59b1cbe
SHA512

efaf7820f8eb2826bf8b1b0709916b97f704304f92ac876e467d83d3c753ad949f64d555d8df2e2e9ee211024750d3df935b6aa9d913c41ae6d125b32cf8f691
SSDEEP

49152:zvWI22SsaNYfdPBldt698dBcjHQhRJ6dbR3LoGdz1fTHHB72eh2NT:zv722SsaNYfdPBldt6+dBcjHQhRJ6vp

Score

10^/10

quasar svchost spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost

C2

quasqy10-51732.portmap.host:4782

Mutex

a44aa8dc-482a-4560-a34f-f21ff1147a02

Attributes

encryption_key
7AC4D01862AC71A180B8FAEE5694E9D7B88EF662
install_name
svchost.exe
log_directory
Logs
reconnect_delay
1000
startup_key
RuntimeBroker
subdirectory
System32

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2204-1-0x00000000008B0000-0x0000000000BD4000-memory.dmp	family_quasar
behavioral1/files/0x0007000000018b62-6.dat	family_quasar
behavioral1/memory/2596-8-0x0000000000DF0000-0x0000000001114000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2596	svchost.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\System32\svchost.exe	FlashingSoftwarePRO.exe
File opened for modification	C:\Windows\system32\System32\svchost.exe	FlashingSoftwarePRO.exe
File opened for modification	C:\Windows\system32\System32	FlashingSoftwarePRO.exe
File opened for modification	C:\Windows\system32\System32\svchost.exe	svchost.exe
File opened for modification	C:\Windows\system32\System32	svchost.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2184	schtasks.exe
2756	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2204	FlashingSoftwarePRO.exe
Token: SeDebugPrivilege	2596	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2596	svchost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2204 wrote to memory of 2184	2204	FlashingSoftwarePRO.exe	30
PID 2204 wrote to memory of 2184	2204	FlashingSoftwarePRO.exe	30
PID 2204 wrote to memory of 2184	2204	FlashingSoftwarePRO.exe	30
PID 2204 wrote to memory of 2596	2204	FlashingSoftwarePRO.exe	32
PID 2204 wrote to memory of 2596	2204	FlashingSoftwarePRO.exe	32
PID 2204 wrote to memory of 2596	2204	FlashingSoftwarePRO.exe	32
PID 2596 wrote to memory of 2756	2596	svchost.exe	33
PID 2596 wrote to memory of 2756	2596	svchost.exe	33
PID 2596 wrote to memory of 2756	2596	svchost.exe	33

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\FlashingSoftwarePRO.exe
"C:\Users\Admin\AppData\Local\Temp\FlashingSoftwarePRO.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Windows\system32\System32\svchost.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2184
- C:\Windows\system32\System32\svchost.exe
  "C:\Windows\system32\System32\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2596
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "RuntimeBroker" /sc ONLOGON /tr "C:\Windows\system32\System32\svchost.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2756

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

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\System32\svchost.exe

Filesize
3.1MB

MD5
abefc9e52207f52bf0c9f6bc69916d23

SHA1
303af0cd029199d8a95ce1a708eb9887e63b73f4

SHA256
544627888509e1cd5a081d030af835f7d7eac014284b606d808cb506b59b1cbe

SHA512
efaf7820f8eb2826bf8b1b0709916b97f704304f92ac876e467d83d3c753ad949f64d555d8df2e2e9ee211024750d3df935b6aa9d913c41ae6d125b32cf8f691

Download Submit
memory/2204-0-0x000007FEF64B3000-0x000007FEF64B4000-memory.dmp

Filesize
4KB

Download
memory/2204-1-0x00000000008B0000-0x0000000000BD4000-memory.dmp

Filesize
3.1MB

Download
memory/2204-2-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/2204-10-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/2596-9-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/2596-8-0x0000000000DF0000-0x0000000001114000-memory.dmp

Filesize
3.1MB

Download
memory/2596-11-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download
memory/2596-12-0x000007FEF64B0000-0x000007FEF6E9C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads