quasar | 69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa

General

Target

69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
Size

3.1MB
MD5

6315500aabd2f39e6ff1743778b843b4
SHA1

d6ef0623f9ced45bf3eb3f384e1d74b0d8dfeabb
SHA256

69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa
SHA512

01429c1d376eeafd7633f098e1693a2882888157a4c876f1c2fcc66da69ebbfd1ab97cb5f8097a33e403f9edf9ba3c53e300ba7463e8ca4a064716e0bc49d693
SSDEEP

49152:gvat62XlaSFNWPjljiFa2RoUYI1M4RJ6rbR3aoGdvYTHHB72eh2NT:gvS62XlaSFNWPjljiFXRoUYI1M4RJ6M

Score

10^/10

quasar 1 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

1

C2

boyshelpboys.com:443

boyshelpboys.com:80

Mutex

8c9d3f58-45fb-4754-9a78-119dc12b3b80

Attributes

encryption_key
4B518181F5BFF92222945FFF2A4095319B5E9CA2
install_name
xiaojie1.exe
log_directory
Logs
reconnect_delay
20
startup_key
xiaojie
subdirectory
bhb

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/2744-1-0x0000000000FC0000-0x00000000012E4000-memory.dmp	family_quasar
behavioral1/files/0x0007000000019490-6.dat	family_quasar
behavioral1/memory/1028-10-0x0000000001010000-0x0000000001334000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1028	xiaojie1.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\system32\bhb\xiaojie1.exe	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
File opened for modification	C:\Windows\system32\bhb\xiaojie1.exe	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
File opened for modification	C:\Windows\system32\bhb\xiaojie1.exe	xiaojie1.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
2892	schtasks.exe
2812	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2744	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
Token: SeDebugPrivilege	1028	xiaojie1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1028	xiaojie1.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2744 wrote to memory of 2892	2744	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	30
PID 2744 wrote to memory of 2892	2744	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	30
PID 2744 wrote to memory of 2892	2744	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	30
PID 2744 wrote to memory of 1028	2744	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	32
PID 2744 wrote to memory of 1028	2744	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	32
PID 2744 wrote to memory of 1028	2744	69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe	32
PID 1028 wrote to memory of 2812	1028	xiaojie1.exe	33
PID 1028 wrote to memory of 2812	1028	xiaojie1.exe	33
PID 1028 wrote to memory of 2812	1028	xiaojie1.exe	33

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\69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe
"C:\Users\Admin\AppData\Local\Temp\69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2744
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "xiaojie" /sc ONLOGON /tr "C:\Windows\system32\bhb\xiaojie1.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2892
- C:\Windows\system32\bhb\xiaojie1.exe
  "C:\Windows\system32\bhb\xiaojie1.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1028
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "xiaojie" /sc ONLOGON /tr "C:\Windows\system32\bhb\xiaojie1.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2812

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\Local\Temp\Cab2CEC.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar3374.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Windows\System32\bhb\xiaojie1.exe

Filesize
3.1MB

MD5
6315500aabd2f39e6ff1743778b843b4

SHA1
d6ef0623f9ced45bf3eb3f384e1d74b0d8dfeabb

SHA256
69192ed1b8a5832f46dfd572184d18907165327e2156867cda33e52ddfd299aa

SHA512
01429c1d376eeafd7633f098e1693a2882888157a4c876f1c2fcc66da69ebbfd1ab97cb5f8097a33e403f9edf9ba3c53e300ba7463e8ca4a064716e0bc49d693

Download Submit
memory/1028-10-0x0000000001010000-0x0000000001334000-memory.dmp

Filesize
3.1MB

Download
memory/1028-9-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/1028-11-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/1028-82-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/1028-101-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-0-0x000007FEF5963000-0x000007FEF5964000-memory.dmp

Filesize
4KB

Download
memory/2744-1-0x0000000000FC0000-0x00000000012E4000-memory.dmp

Filesize
3.1MB

Download
memory/2744-2-0x000007FEF5960000-0x000007FEF634C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-8-0x000007FEF5960000-0x000007FEF634C000-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