asyncrat | 4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977

General

Target

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
Size

52KB
MD5

43bf2b1b12150aa4f795cb6d6eff697f
SHA1

ac0ef971638009f16c8d5f2d30cb9baf656d2045
SHA256

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977
SHA512

0d052d66436d3590c624b4098fb21a9064497d24ca5997a88ae3159f2ad675733c8dcf7f6dc8b44b05b6a68d4c68b6af56d52bfe6c65b90c586e241bf074a5f4
SSDEEP

1536:WAcOVTwJ4u2NK7wHz3bCXSnSFba5cNT+:WAcyTwJ4u2NKEz3bCMSFAIi

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

jnic.lol:80

jnic.lol:443

www.langya.shop:80

www.langya.shop:443

www.jnic.lol:80

www.jnic.lol:443

Mutex

dfQOqKWMCcqD

Attributes

delay
3
install
true
install_file
ChenQiYuan.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral1/files/0x0009000000016d3f-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

ChenQiYuan.exe

pid	Process
2812	ChenQiYuan.exe

Loads dropped DLL 1 IoCs

Processes:

cmd.exe

pid	Process
264	cmd.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

cmd.execmd.exeschtasks.exetimeout.exeChenQiYuan.exe4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ChenQiYuan.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
2208	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
2756	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe

pid	Process
1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exeChenQiYuan.exe

description	pid	Process
Token: SeDebugPrivilege	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
Token: SeDebugPrivilege	2812	ChenQiYuan.exe
Token: SeDebugPrivilege	2812	ChenQiYuan.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.execmd.execmd.exe

description	pid	Process	procid_target
PID 1848 wrote to memory of 1636	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	31
PID 1848 wrote to memory of 1636	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	31
PID 1848 wrote to memory of 1636	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	31
PID 1848 wrote to memory of 1636	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	31
PID 1848 wrote to memory of 264	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	33
PID 1848 wrote to memory of 264	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	33
PID 1848 wrote to memory of 264	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	33
PID 1848 wrote to memory of 264	1848	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	33
PID 1636 wrote to memory of 2756	1636	cmd.exe	35
PID 1636 wrote to memory of 2756	1636	cmd.exe	35
PID 1636 wrote to memory of 2756	1636	cmd.exe	35
PID 1636 wrote to memory of 2756	1636	cmd.exe	35
PID 264 wrote to memory of 2208	264	cmd.exe	36
PID 264 wrote to memory of 2208	264	cmd.exe	36
PID 264 wrote to memory of 2208	264	cmd.exe	36
PID 264 wrote to memory of 2208	264	cmd.exe	36
PID 264 wrote to memory of 2812	264	cmd.exe	37
PID 264 wrote to memory of 2812	264	cmd.exe	37
PID 264 wrote to memory of 2812	264	cmd.exe	37
PID 264 wrote to memory of 2812	264	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
"C:\Users\Admin\AppData\Local\Temp\4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1848
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ChenQiYuan" /tr '"C:\Users\Admin\AppData\Roaming\ChenQiYuan.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1636
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ChenQiYuan" /tr '"C:\Users\Admin\AppData\Roaming\ChenQiYuan.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2756
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDF19.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:264
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2208
- - C:\Users\Admin\AppData\Roaming\ChenQiYuan.exe
    "C:\Users\Admin\AppData\Roaming\ChenQiYuan.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Cab6D6.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar1441.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpDF19.tmp.bat

Filesize
154B

MD5
e3ba576e2420854b598bf6bd5ac0bb59

SHA1
ab3c150938dbe99e0718cfa51fdd50746bbfbe76

SHA256
a4524198b37c7583744727bc7dfc3c3301768d98b62f08cc6523988866d3149a

SHA512
344ab6f3fd0c38a26513847c76dfef544df7c79c87aa47fe8cfddaf748f551c15109b763be68ca5aeaacc6a961a4a20462d0409a7bf33b81908865d8b1a46bd8

Download Submit
\Users\Admin\AppData\Roaming\ChenQiYuan.exe

Filesize
52KB

MD5
43bf2b1b12150aa4f795cb6d6eff697f

SHA1
ac0ef971638009f16c8d5f2d30cb9baf656d2045

SHA256
4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977

SHA512
0d052d66436d3590c624b4098fb21a9064497d24ca5997a88ae3159f2ad675733c8dcf7f6dc8b44b05b6a68d4c68b6af56d52bfe6c65b90c586e241bf074a5f4

Download Submit
memory/1848-0-0x0000000074BFE000-0x0000000074BFF000-memory.dmp

Filesize
4KB

Download
memory/1848-1-0x0000000000130000-0x0000000000144000-memory.dmp

Filesize
80KB

Download
memory/1848-2-0x0000000074BF0000-0x00000000752DE000-memory.dmp

Filesize
6.9MB

Download
memory/1848-11-0x0000000074BF0000-0x00000000752DE000-memory.dmp

Filesize
6.9MB

Download
memory/2812-16-0x00000000002A0000-0x00000000002B4000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads