quasar | 9a20abb95dd8ee12f24afcd2729e9f92493feca9d2fe75aaa9b1758c08a93f44

General

Target

Client-built.exe
Size

3.1MB
MD5

c10246a3d7708f3f62e843ece9d68fa4
SHA1

81c15351ad25c46676a93b82eccf6a7abb9c4727
SHA256

9a20abb95dd8ee12f24afcd2729e9f92493feca9d2fe75aaa9b1758c08a93f44
SHA512

a960fed8a6780f598be60634bbcbf0967a7035c3a74ffb293610f10153afcfe92989c5253c75c0b164fd36cf00a83a6b2ff0be722bd6b9a9d8bff4a8a5e69323
SSDEEP

49152:2vOI22SsaNYfdPBldt698dBcjHVPDPEQs/kC6nLoG7pTHHB72eh2NT:2vj22SsaNYfdPBldt6+dBcjHVPD9L

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

147.185.221.24:26130

Mutex

0c16ac3a-65ad-4a46-aa3d-7e603e8df11d

Attributes

encryption_key
8DF659EF1733572C92CB099CAABF5BB85EC5170A
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 family
quasar

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2328-1-0x0000000001230000-0x0000000001554000-memory.dmp	family_quasar
behavioral1/files/0x0009000000016cc9-6.dat	family_quasar
behavioral1/memory/584-8-0x0000000000860000-0x0000000000B84000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
584	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2328	Client-built.exe
Token: SeDebugPrivilege	584	Client.exe
Token: SeDebugPrivilege	2780	taskmgr.exe

Suspicious use of FindShellTrayWindow 32 IoCs

pid	Process
584	Client.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe

Suspicious use of SendNotifyMessage 32 IoCs

pid	Process
584	Client.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe
2780	taskmgr.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 584	2328	Client-built.exe	31
PID 2328 wrote to memory of 584	2328	Client-built.exe	31
PID 2328 wrote to memory of 584	2328	Client-built.exe	31

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2328
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:584

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:2780

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
c10246a3d7708f3f62e843ece9d68fa4

SHA1
81c15351ad25c46676a93b82eccf6a7abb9c4727

SHA256
9a20abb95dd8ee12f24afcd2729e9f92493feca9d2fe75aaa9b1758c08a93f44

SHA512
a960fed8a6780f598be60634bbcbf0967a7035c3a74ffb293610f10153afcfe92989c5253c75c0b164fd36cf00a83a6b2ff0be722bd6b9a9d8bff4a8a5e69323

Download Submit
memory/584-7-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/584-9-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/584-8-0x0000000000860000-0x0000000000B84000-memory.dmp

Filesize
3.1MB

Download
memory/584-12-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2328-0-0x000007FEF6083000-0x000007FEF6084000-memory.dmp

Filesize
4KB

Download
memory/2328-1-0x0000000001230000-0x0000000001554000-memory.dmp

Filesize
3.1MB

Download
memory/2328-2-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2328-10-0x000007FEF6080000-0x000007FEF6A6C000-memory.dmp

Filesize
9.9MB

Download
memory/2780-11-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/2780-13-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download

Analysis

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