quasar | 74afe07e1c9db57aac77083c0ae3fe619897b17f5e3b4cbee0ef5a1ed96926a5

General

Target

ghew.exe
Size

3.1MB
MD5

5339f895bb32d0aeb85a66d679eee3e3
SHA1

188de7231d2e6884fcc6cff53ec0146c10c01921
SHA256

74afe07e1c9db57aac77083c0ae3fe619897b17f5e3b4cbee0ef5a1ed96926a5
SHA512

df81c791789ed699f2e852b794c4a227738633b00ae8c5c02db0793be770897a67230c82e15129ea61786a971cb213f5392367efb59ac0c902ec9a4a6448633e
SSDEEP

49152:yvBt62XlaSFNWPjljiFa2RoUYI6rkweJfoGddTxTHHB72eh2NT:yvr62XlaSFNWPjljiFXRoUYI6rkweBN

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

4.tcp.us-cal-1.ngrok.io:15387

Mutex

6d7137f1-888a-4306-b936-24b0c1cd3c6d

Attributes

encryption_key
9C726C32E22321BF6CA2A3F704FAB2189268B504
install_name
LogitechDRV.exe
log_directory
Logs
reconnect_delay
3000
startup_key
LogitechDRV
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/2292-1-0x0000000000AB0000-0x0000000000DD4000-memory.dmp	family_quasar
behavioral1/files/0x000800000001941b-6.dat	family_quasar
behavioral1/memory/1228-10-0x00000000010A0000-0x00000000013C4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1228	LogitechDRV.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs

Web Service

T1102

flow	ioc
2	4.tcp.us-cal-1.ngrok.io
17	4.tcp.us-cal-1.ngrok.io
30	4.tcp.us-cal-1.ngrok.io

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir	ghew.exe
File opened for modification	C:\Windows\system32\SubDir\LogitechDRV.exe	LogitechDRV.exe
File opened for modification	C:\Windows\system32\SubDir	LogitechDRV.exe
File created	C:\Windows\system32\SubDir\LogitechDRV.exe	ghew.exe
File opened for modification	C:\Windows\system32\SubDir\LogitechDRV.exe	ghew.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
484	schtasks.exe
2332	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2292	ghew.exe
Token: SeDebugPrivilege	1228	LogitechDRV.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1228	LogitechDRV.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2292 wrote to memory of 484	2292	ghew.exe	31
PID 2292 wrote to memory of 484	2292	ghew.exe	31
PID 2292 wrote to memory of 484	2292	ghew.exe	31
PID 2292 wrote to memory of 1228	2292	ghew.exe	33
PID 2292 wrote to memory of 1228	2292	ghew.exe	33
PID 2292 wrote to memory of 1228	2292	ghew.exe	33
PID 1228 wrote to memory of 2332	1228	LogitechDRV.exe	34
PID 1228 wrote to memory of 2332	1228	LogitechDRV.exe	34
PID 1228 wrote to memory of 2332	1228	LogitechDRV.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\ghew.exe
"C:\Users\Admin\AppData\Local\Temp\ghew.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2292
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "LogitechDRV" /sc ONLOGON /tr "C:\Windows\system32\SubDir\LogitechDRV.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:484
- C:\Windows\system32\SubDir\LogitechDRV.exe
  "C:\Windows\system32\SubDir\LogitechDRV.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1228
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "LogitechDRV" /sc ONLOGON /tr "C:\Windows\system32\SubDir\LogitechDRV.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2332

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Windows\System32\SubDir\LogitechDRV.exe

Filesize
3.1MB

MD5
5339f895bb32d0aeb85a66d679eee3e3

SHA1
188de7231d2e6884fcc6cff53ec0146c10c01921

SHA256
74afe07e1c9db57aac77083c0ae3fe619897b17f5e3b4cbee0ef5a1ed96926a5

SHA512
df81c791789ed699f2e852b794c4a227738633b00ae8c5c02db0793be770897a67230c82e15129ea61786a971cb213f5392367efb59ac0c902ec9a4a6448633e

Download Submit
memory/1228-9-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/1228-10-0x00000000010A0000-0x00000000013C4000-memory.dmp

Filesize
3.1MB

Download
memory/1228-11-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/1228-12-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/1228-13-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2292-0-0x000007FEF5B13000-0x000007FEF5B14000-memory.dmp

Filesize
4KB

Download
memory/2292-1-0x0000000000AB0000-0x0000000000DD4000-memory.dmp

Filesize
3.1MB

Download
memory/2292-2-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2292-8-0x000007FEF5B10000-0x000007FEF64FC000-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