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 3 IoCs

resource	yara_rule
behavioral1/memory/3000-1-0x00000000002E0000-0x0000000000604000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016d58-6.dat	family_quasar
behavioral1/memory/2404-8-0x0000000000AC0000-0x0000000000DE4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2404	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
1732	schtasks.exe
2308	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3000	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe
Token: SeDebugPrivilege	2404	wininit.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 1732	3000	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	30
PID 3000 wrote to memory of 1732	3000	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	30
PID 3000 wrote to memory of 1732	3000	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	30
PID 3000 wrote to memory of 2404	3000	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	32
PID 3000 wrote to memory of 2404	3000	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	32
PID 3000 wrote to memory of 2404	3000	b2dc53182a52e5c69dadc178d78293ba0279bab390060706aea82e06d6d0ee38.exe	32
PID 2404 wrote to memory of 2308	2404	wininit.exe	33
PID 2404 wrote to memory of 2308	2404	wininit.exe	33
PID 2404 wrote to memory of 2308	2404	wininit.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\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:3000
- 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:1732
- 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:2404
- - 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:2308

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/2404-10-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2404-8-0x0000000000AC0000-0x0000000000DE4000-memory.dmp

Filesize
3.1MB

Download
memory/2404-11-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/2404-12-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/3000-0-0x000007FEF6033000-0x000007FEF6034000-memory.dmp

Filesize
4KB

Download
memory/3000-1-0x00000000002E0000-0x0000000000604000-memory.dmp

Filesize
3.1MB

Download
memory/3000-2-0x000007FEF6030000-0x000007FEF6A1C000-memory.dmp

Filesize
9.9MB

Download
memory/3000-9-0x000007FEF6030000-0x000007FEF6A1C000-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