quasar | b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38

General

Target
b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
Size 3.1MB
Sample241107-dk9pnswpcj
SHA256 b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38
MD5 65d9cfbe768bb4f5840ef5ce4610491d
SHA1 9a6c333de102612e87b2b5e77250fc157d8e3b2c
SHA512 8109122d52b62fb9801a127aa1c7939eef5544c491696d6f251e0d622eda39a0b30d8a0faf3b7c655fd080e83e52b0525329fff8e440fc29b54fa7d4b4acc7ba
SSDEEP 49152:zvCI22SsaNYfdPBldt698dBcjH5bQau5p+5k/eLoGdqYPTHHB72eh2NT:zvP22SsaNYfdPBldt6+dBcjHCa/t
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

79.110.49.113:4782

Mutex

80cc45d9-dc43-44b3-ac80-ecdaba7021d0

Attributes

encryption_key
3EE23A56AD46569523F47CC2BF5DF3AC7BD43361
install_name
wininit.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Security
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/3516-1-0x0000000000C20000-0x0000000000F44000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023ca3-7.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1604	wininit.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
File created	C:\Program Files\SubDir\wininit.exe	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
File opened for modification	C:\Program Files\SubDir\wininit.exe	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
File opened for modification	C:\Program Files\SubDir	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
File opened for modification	C:\Program Files\SubDir\wininit.exe	wininit.exe
File opened for modification	C:\Program Files\SubDir	wininit.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
236	schtasks.exe
2704	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3516	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
Token: SeDebugPrivilege	1604	wininit.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3516 wrote to memory of 236	3516	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	85
PID 3516 wrote to memory of 236	3516	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	85
PID 3516 wrote to memory of 1604	3516	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	87
PID 3516 wrote to memory of 1604	3516	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	87
PID 1604 wrote to memory of 2704	1604	wininit.exe	89
PID 1604 wrote to memory of 2704	1604	wininit.exe	89

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\b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
"C:\Users\Admin\AppData\Local\Temp\b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3516
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Security" /sc ONLOGON /tr "C:\Program Files\SubDir\wininit.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:236
- C:\Program Files\SubDir\wininit.exe
  "C:\Program Files\SubDir\wininit.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1604
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Security" /sc ONLOGON /tr "C:\Program Files\SubDir\wininit.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2704

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

wininit.exe

Path C:\Program Files\SubDir\wininit.exe
Size 3.1MB
SHA256 b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38
MD5 65d9cfbe768bb4f5840ef5ce4610491d
SHA1 9a6c333de102612e87b2b5e77250fc157d8e3b2c
SHA512 8109122d52b62fb9801a127aa1c7939eef5544c491696d6f251e0d622eda39a0b30d8a0faf3b7c655fd080e83e52b0525329fff8e440fc29b54fa7d4b4acc7ba
SSDEEP 49152:zvCI22SsaNYfdPBldt698dBcjH5bQau5p+5k/eLoGdqYPTHHB72eh2NT:zvP22SsaNYfdPBldt6+dBcjHCa/t
MD5 SHA1 SHA512 SSDEEP

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memory/1604-9-0x00007FFBB8960000-0x00007FFBB9421000-memory.dmp

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memory/1604-11-0x00007FFBB8960000-0x00007FFBB9421000-memory.dmp

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memory/1604-12-0x0000000002F90000-0x0000000002FE0000-memory.dmp

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memory/1604-13-0x000000001C030000-0x000000001C0E2000-memory.dmp

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memory/1604-14-0x00007FFBB8960000-0x00007FFBB9421000-memory.dmp

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memory/3516-0-0x00007FFBB8963000-0x00007FFBB8965000-memory.dmp

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memory/3516-1-0x0000000000C20000-0x0000000000F44000-memory.dmp

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memory/3516-2-0x00007FFBB8960000-0x00007FFBB9421000-memory.dmp

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memory/3516-10-0x00007FFBB8960000-0x00007FFBB9421000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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