quasar | b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38

General

Target

b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
Size

3.1MB
MD5

65d9cfbe768bb4f5840ef5ce4610491d
SHA1

9a6c333de102612e87b2b5e77250fc157d8e3b2c
SHA256

b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38
SHA512

8109122d52b62fb9801a127aa1c7939eef5544c491696d6f251e0d622eda39a0b30d8a0faf3b7c655fd080e83e52b0525329fff8e440fc29b54fa7d4b4acc7ba
SSDEEP

49152:zvCI22SsaNYfdPBldt698dBcjH5bQau5p+5k/eLoGdqYPTHHB72eh2NT:zvP22SsaNYfdPBldt6+dBcjHCa/t

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/4120-1-0x00000000009E0000-0x0000000000D04000-memory.dmp	family_quasar
behavioral2/files/0x000c000000023b8f-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1176	wininit.exe

Drops file in Program Files directory 5 IoCs

description	ioc	Process
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
File created	C:\Program Files\SubDir\wininit.exe	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.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
216	schtasks.exe
2320	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4120	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
Token: SeDebugPrivilege	1176	wininit.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4120 wrote to memory of 216	4120	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	86
PID 4120 wrote to memory of 216	4120	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	86
PID 4120 wrote to memory of 1176	4120	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	88
PID 4120 wrote to memory of 1176	4120	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	88
PID 1176 wrote to memory of 2320	1176	wininit.exe	89
PID 1176 wrote to memory of 2320	1176	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:4120
- 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:216
- 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:1176
- - 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:2320

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:\Program Files\SubDir\wininit.exe

Filesize
3.1MB

MD5
65d9cfbe768bb4f5840ef5ce4610491d

SHA1
9a6c333de102612e87b2b5e77250fc157d8e3b2c

SHA256
b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38

SHA512
8109122d52b62fb9801a127aa1c7939eef5544c491696d6f251e0d622eda39a0b30d8a0faf3b7c655fd080e83e52b0525329fff8e440fc29b54fa7d4b4acc7ba

Download Submit
memory/1176-9-0x00007FFB25BC0000-0x00007FFB26681000-memory.dmp

Filesize
10.8MB

Download
memory/1176-11-0x00007FFB25BC0000-0x00007FFB26681000-memory.dmp

Filesize
10.8MB

Download
memory/1176-12-0x000000001C380000-0x000000001C3D0000-memory.dmp

Filesize
320KB

Download
memory/1176-13-0x000000001C490000-0x000000001C542000-memory.dmp

Filesize
712KB

Download
memory/1176-14-0x00007FFB25BC0000-0x00007FFB26681000-memory.dmp

Filesize
10.8MB

Download
memory/4120-0-0x00007FFB25BC3000-0x00007FFB25BC5000-memory.dmp

Filesize
8KB

Download
memory/4120-1-0x00000000009E0000-0x0000000000D04000-memory.dmp

Filesize
3.1MB

Download
memory/4120-2-0x00007FFB25BC0000-0x00007FFB26681000-memory.dmp

Filesize
10.8MB

Download
memory/4120-10-0x00007FFB25BC0000-0x00007FFB26681000-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