quasar | d87f8f1d4a38fc2d15dac5c57f74fd61e1c712e4684c10db18ff5fc00ed07bac

General

Target

78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe
Size

247KB
MD5

78b9f217ca7f78a34e558ecc5e61bbe1
SHA1

3a6f51af13d6357ff3718b82490fc19b203ea5fa
SHA256

d87f8f1d4a38fc2d15dac5c57f74fd61e1c712e4684c10db18ff5fc00ed07bac
SHA512

67dbebf6f00309fd2928fc75b8afd940d4a598c8b96c7fa1a6ec672e9dce7aaaabc27a992c7b7c7528f7866f648f1e5e1718a669f64c7731e77165beff966527
SSDEEP

6144:vi8ju8hJsKdmmBPMF6FKAw0gfE1cVr78eZRduif/:vM8LdBCFKKV0gccVHxf/

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

ipaixincungduoc.hopto.org:3389

ipaixincungok.hopto.org:3389

Mutex

QSR_MUTEX_nNZSBb4AKQyYo1cS8B

Attributes

encryption_key
CLfGeDzyrgMe5rMRQTJb
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1344-14-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/1344-12-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/1344-10-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/1344-7-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/1344-6-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

2 ip-api.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe

description pid process target process

PID 1660 set thread context of 1344 1660 78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

2728 1344 WerFault.exe RegAsm.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

2480 PING.EXE
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 1344 RegAsm.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid process

1344 RegAsm.exe

flow	ioc
2	ip-api.com

description	pid	process	target process
PID 1660 set thread context of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe

pid	pid_target	process	target process
2728	1344	WerFault.exe	RegAsm.exe

pid	process
2480	PING.EXE

description	pid	process
Token: SeDebugPrivilege	1344	RegAsm.exe

pid	process
1344	RegAsm.exe

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exeRegAsm.execmd.exe

description	pid	process	target process
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1660 wrote to memory of 1344	1660	78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe	RegAsm.exe
PID 1344 wrote to memory of 2596	1344	RegAsm.exe	cmd.exe
PID 1344 wrote to memory of 2596	1344	RegAsm.exe	cmd.exe
PID 1344 wrote to memory of 2596	1344	RegAsm.exe	cmd.exe
PID 1344 wrote to memory of 2596	1344	RegAsm.exe	cmd.exe
PID 1344 wrote to memory of 2728	1344	RegAsm.exe	WerFault.exe
PID 1344 wrote to memory of 2728	1344	RegAsm.exe	WerFault.exe
PID 1344 wrote to memory of 2728	1344	RegAsm.exe	WerFault.exe
PID 1344 wrote to memory of 2728	1344	RegAsm.exe	WerFault.exe
PID 2596 wrote to memory of 2044	2596	cmd.exe	chcp.com
PID 2596 wrote to memory of 2044	2596	cmd.exe	chcp.com
PID 2596 wrote to memory of 2044	2596	cmd.exe	chcp.com
PID 2596 wrote to memory of 2044	2596	cmd.exe	chcp.com
PID 2596 wrote to memory of 2480	2596	cmd.exe	PING.EXE
PID 2596 wrote to memory of 2480	2596	cmd.exe	PING.EXE
PID 2596 wrote to memory of 2480	2596	cmd.exe	PING.EXE
PID 2596 wrote to memory of 2480	2596	cmd.exe	PING.EXE
PID 2596 wrote to memory of 2700	2596	cmd.exe	RegAsm.exe
PID 2596 wrote to memory of 2700	2596	cmd.exe	RegAsm.exe
PID 2596 wrote to memory of 2700	2596	cmd.exe	RegAsm.exe
PID 2596 wrote to memory of 2700	2596	cmd.exe	RegAsm.exe
PID 2596 wrote to memory of 2700	2596	cmd.exe	RegAsm.exe
PID 2596 wrote to memory of 2700	2596	cmd.exe	RegAsm.exe
PID 2596 wrote to memory of 2700	2596	cmd.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\78b9f217ca7f78a34e558ecc5e61bbe1_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1660
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1344
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\xTAa4U5qfgQ7.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2596
  - - C:\Windows\SysWOW64\chcp.com
      chcp 65001
      4⤵
      PID:2044
  - - C:\Windows\SysWOW64\PING.EXE
      ping -n 10 localhost
      4⤵
      Runs ping.exe
      PID:2480
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      PID:2700
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1344 -s 1500
    3⤵
    - Program crash
    PID:2728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\xTAa4U5qfgQ7.bat

Filesize
215B

MD5
e3e4a7c310b22d3d81a01100380ed75a

SHA1
f09f1e718bf8477542f59bce06d65ecde3bb5620

SHA256
f9d9b6e51664f984bbc6d2a8dfc0fdb337cfdacc824528d846d088e8336227d7

SHA512
32a0dd231d537f548c570c8af324b92f04613c9c336a5adfcacf03bd5d46359248725de9fe7df489cec72f2a053fb5f1afc4737285971861642246bdcec34c86

Download Submit
memory/1344-6-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1344-7-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1344-4-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1344-8-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1344-14-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1344-12-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1344-10-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1344-5-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/1660-0-0x0000000073EFE000-0x0000000073EFF000-memory.dmp

Filesize
4KB

Download
memory/1660-2-0x00000000004B0000-0x00000000004F6000-memory.dmp

Filesize
280KB

Download
memory/1660-3-0x0000000073EF0000-0x00000000745DE000-memory.dmp

Filesize
6.9MB

Download
memory/1660-15-0x0000000073EF0000-0x00000000745DE000-memory.dmp

Filesize
6.9MB

Download
memory/1660-1-0x0000000000120000-0x0000000000164000-memory.dmp

Filesize
272KB

Download
memory/2700-26-0x0000000000070000-0x0000000000082000-memory.dmp

Filesize
72KB

Download

Analysis

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