quasar | 1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766

General

Target

1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe
Size

502KB
MD5

1441905fc4082ee6055ea39f5875a6c5
SHA1

78f91f9f9ffe47e5f47e9844bd026d150146744e
SHA256

1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766
SHA512

70e9ab0e49b4bf89505f16c499538daebc1e8da72488cd63ff60747d15a1d486ba38802b0622c9240d10ff68ab32e6bb36a0b809e7cd0e2ec4945d023ce86c5c
SSDEEP

12288:gTEgdfYe/iKg3qFE4/ywNFpdrdwzTCcdj:1UwC5F9ywNFpdJ7cdj

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

192.168.31.99:4782

2001:4bc9:1f98:a4e::676:4782

255.255.255.0:4782

fe80::cabf:4cff:fe84:9572%17:4782

Mutex

1f65a787-81b8-4955-95e4-b7751e10cd50

Attributes

encryption_key
A0B82A50BBC49EC084E3E53A9E34DF58BD7050B9
install_name
Java Updater.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java Updater
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/2160-1-0x00000000013D0000-0x0000000001454000-memory.dmp	family_quasar
behavioral1/files/0x000800000001650a-5.dat	family_quasar
behavioral1/memory/1728-7-0x0000000000FC0000-0x0000000001044000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1728	Java Updater.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
2380	schtasks.exe
1956	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2160	1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe
Token: SeDebugPrivilege	1728	Java Updater.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1728	Java Updater.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 2380	2160	1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe	31
PID 2160 wrote to memory of 2380	2160	1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe	31
PID 2160 wrote to memory of 2380	2160	1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe	31
PID 2160 wrote to memory of 1728	2160	1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe	33
PID 2160 wrote to memory of 1728	2160	1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe	33
PID 2160 wrote to memory of 1728	2160	1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe	33
PID 1728 wrote to memory of 1956	1728	Java Updater.exe	34
PID 1728 wrote to memory of 1956	1728	Java Updater.exe	34
PID 1728 wrote to memory of 1956	1728	Java Updater.exe	34

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\1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe
"C:\Users\Admin\AppData\Local\Temp\1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2380
- C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1728
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Java Updater.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1956

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\SubDir\Java Updater.exe

Filesize
502KB

MD5
1441905fc4082ee6055ea39f5875a6c5

SHA1
78f91f9f9ffe47e5f47e9844bd026d150146744e

SHA256
1b05c4d74e0d17a983f9b91aa706a7a60f37ec270b7e2433d6798afa1c7be766

SHA512
70e9ab0e49b4bf89505f16c499538daebc1e8da72488cd63ff60747d15a1d486ba38802b0622c9240d10ff68ab32e6bb36a0b809e7cd0e2ec4945d023ce86c5c

Download Submit
memory/1728-7-0x0000000000FC0000-0x0000000001044000-memory.dmp

Filesize
528KB

Download
memory/1728-9-0x000007FEF52B0000-0x000007FEF5C9C000-memory.dmp

Filesize
9.9MB

Download
memory/1728-8-0x000007FEF52B0000-0x000007FEF5C9C000-memory.dmp

Filesize
9.9MB

Download
memory/1728-11-0x000007FEF52B0000-0x000007FEF5C9C000-memory.dmp

Filesize
9.9MB

Download
memory/2160-0-0x000007FEF52B3000-0x000007FEF52B4000-memory.dmp

Filesize
4KB

Download
memory/2160-1-0x00000000013D0000-0x0000000001454000-memory.dmp

Filesize
528KB

Download
memory/2160-2-0x000007FEF52B0000-0x000007FEF5C9C000-memory.dmp

Filesize
9.9MB

Download
memory/2160-10-0x000007FEF52B0000-0x000007FEF5C9C000-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