quasar | 741a3f8b91ad8ef7bf2936bafddb95200b0f3083a6933d1d82c278baaa6ec9c7

Analysis

max time kernel
150s
max time network
153s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
18/02/2023, 19:02

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General

Target
tmp.exe
Size 502KB
Sample230218-xpsfqsdb74
SHA256 741a3f8b91ad8ef7bf2936bafddb95200b0f3083a6933d1d82c278baaa6ec9c7
MD5 bbd0db3230e57aeb7ca23e59aadf0134
SHA1 fdda0bfd08bbd74557dd878bda12f05368befb7d
SHA512 4393b5dcac40f0b36bf85e50f66ed299a95c298b5c8e4853aae8e5f84ab7d2cb64a989728b21135e2730afaddd60002872e517e8b67b68085f97345ff4a6baf3
SSDEEP 6144:VTEgdc0YpXAGbgiIN2RSBuSBtPB+a9VIvyTcEi9b8F9vkDC+ROcTR32:VTEgdfYlbgRljSCN8CQOcd2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

flingmodder-53370.portmap.io:53370

Mutex

c16cce68-0a86-440c-89b1-c088c1c8b4cb

Attributes

encryption_key
9BFDFBA45AE2C2C16DA4EEEA02438784B89CACC0
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svchost
subdirectory
windows

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 4 IoCs

resource	yara_rule
behavioral1/memory/1456-54-0x0000000001280000-0x0000000001304000-memory.dmp	family_quasar
behavioral1/files/0x000a0000000133ab-58.dat	family_quasar
behavioral1/files/0x000a0000000133ab-59.dat	family_quasar
behavioral1/memory/1796-60-0x0000000000170000-0x00000000001F4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1796	svchost.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
968	schtasks.exe
952	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1456	tmp.exe
Token: SeDebugPrivilege	1796	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1796	svchost.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1456 wrote to memory of 968	1456	tmp.exe	26
PID 1456 wrote to memory of 968	1456	tmp.exe	26
PID 1456 wrote to memory of 968	1456	tmp.exe	26
PID 1456 wrote to memory of 1796	1456	tmp.exe	28
PID 1456 wrote to memory of 1796	1456	tmp.exe	28
PID 1456 wrote to memory of 1796	1456	tmp.exe	28
PID 1796 wrote to memory of 952	1796	svchost.exe	29
PID 1796 wrote to memory of 952	1796	svchost.exe	29
PID 1796 wrote to memory of 952	1796	svchost.exe	29

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1456
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\tmp.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:968
- C:\Users\Admin\AppData\Roaming\windows\svchost.exe
  "C:\Users\Admin\AppData\Roaming\windows\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1796
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\windows\svchost.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:952

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

svchost.exe

Path C:\Users\Admin\AppData\Roaming\windows\svchost.exe
Size 502KB
SHA256 741a3f8b91ad8ef7bf2936bafddb95200b0f3083a6933d1d82c278baaa6ec9c7
MD5 bbd0db3230e57aeb7ca23e59aadf0134
SHA1 fdda0bfd08bbd74557dd878bda12f05368befb7d
SHA512 4393b5dcac40f0b36bf85e50f66ed299a95c298b5c8e4853aae8e5f84ab7d2cb64a989728b21135e2730afaddd60002872e517e8b67b68085f97345ff4a6baf3
SSDEEP 6144:VTEgdc0YpXAGbgiIN2RSBuSBtPB+a9VIvyTcEi9b8F9vkDC+ROcTR32:VTEgdfYlbgRljSCN8CQOcd2
MD5 SHA1 SHA512 SSDEEP

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svchost.exe

Path C:\Users\Admin\AppData\Roaming\windows\svchost.exe
Size 502KB
SHA256 741a3f8b91ad8ef7bf2936bafddb95200b0f3083a6933d1d82c278baaa6ec9c7
MD5 bbd0db3230e57aeb7ca23e59aadf0134
SHA1 fdda0bfd08bbd74557dd878bda12f05368befb7d
SHA512 4393b5dcac40f0b36bf85e50f66ed299a95c298b5c8e4853aae8e5f84ab7d2cb64a989728b21135e2730afaddd60002872e517e8b67b68085f97345ff4a6baf3
SSDEEP 6144:VTEgdc0YpXAGbgiIN2RSBuSBtPB+a9VIvyTcEi9b8F9vkDC+ROcTR32:VTEgdfYlbgRljSCN8CQOcd2
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1456-54-0x0000000001280000-0x0000000001304000-memory.dmp

Download

memory/1456-55-0x000007FEFC141000-0x000007FEFC143000-memory.dmp

Download

memory/1796-60-0x0000000000170000-0x00000000001F4000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads