quasar | bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8

General

Target

bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe
Size

3.1MB
MD5

94848fcd4bf5aebebc8743d7fc61deb0
SHA1

29e05044af8bb2c017bd63c5c87812faf9c83e1f
SHA256

bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8
SHA512

0fef5812657ba4545532cd004365b17b54934f778846586f7369327f4937b65c05f71cc7f2acf8d267eae74ed45bd596d31a5685ea5bbee557d8aca2ba703ea8
SSDEEP

49152:Ovtt62XlaSFNWPjljiFa2RoUYIcmRJ6DbR3LoGd8DTHHB72eh2NT:OvP62XlaSFNWPjljiFXRoUYIcmRJ61

Score

10^/10

quasar office06 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office06

C2

154.216.19.77:7000

Mutex

1e8aec43-b30a-4c63-9211-c18c9decd0e0

Attributes

encryption_key
2A64449428B4580ED5FC6EE66024E26C725626BE
install_name
s.exe
log_directory
Logs
reconnect_delay
3000
startup_key
ssssss
subdirectory
dir

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/2608-1-0x0000000000C00000-0x0000000000F24000-memory.dmp	family_quasar
behavioral1/files/0x000c000000016458-5.dat	family_quasar
behavioral1/memory/1644-8-0x0000000000DD0000-0x00000000010F4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1644	s.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
2168	schtasks.exe
2188	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2608	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe
Token: SeDebugPrivilege	1644	s.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1644	s.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2608 wrote to memory of 2168	2608	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	29
PID 2608 wrote to memory of 2168	2608	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	29
PID 2608 wrote to memory of 2168	2608	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	29
PID 2608 wrote to memory of 1644	2608	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	31
PID 2608 wrote to memory of 1644	2608	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	31
PID 2608 wrote to memory of 1644	2608	bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe	31
PID 1644 wrote to memory of 2188	1644	s.exe	32
PID 1644 wrote to memory of 2188	1644	s.exe	32
PID 1644 wrote to memory of 2188	1644	s.exe	32

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\bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe
"C:\Users\Admin\AppData\Local\Temp\bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8N.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2608
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "ssssss" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\dir\s.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2168
- C:\Users\Admin\AppData\Roaming\dir\s.exe
  "C:\Users\Admin\AppData\Roaming\dir\s.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1644
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "ssssss" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\dir\s.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2188

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:\Users\Admin\AppData\Roaming\dir\s.exe

Filesize
3.1MB

MD5
94848fcd4bf5aebebc8743d7fc61deb0

SHA1
29e05044af8bb2c017bd63c5c87812faf9c83e1f

SHA256
bb72088c6564bedd1c62d1819e6b6b6815e093f36560d7d3db0c6f4f58b2c9c8

SHA512
0fef5812657ba4545532cd004365b17b54934f778846586f7369327f4937b65c05f71cc7f2acf8d267eae74ed45bd596d31a5685ea5bbee557d8aca2ba703ea8

Download Submit
memory/1644-8-0x0000000000DD0000-0x00000000010F4000-memory.dmp

Filesize
3.1MB

Download
memory/1644-10-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp

Filesize
9.9MB

Download
memory/1644-9-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp

Filesize
9.9MB

Download
memory/1644-11-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp

Filesize
9.9MB

Download
memory/2608-0-0x000007FEF5A93000-0x000007FEF5A94000-memory.dmp

Filesize
4KB

Download
memory/2608-1-0x0000000000C00000-0x0000000000F24000-memory.dmp

Filesize
3.1MB

Download
memory/2608-2-0x000007FEF5A90000-0x000007FEF647C000-memory.dmp

Filesize
9.9MB

Download
memory/2608-7-0x000007FEF5A90000-0x000007FEF647C000-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