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
behavioral2/files/0x0002000000022b11-11.dat	family_asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe

Executes dropped EXE 1 IoCs

Processes:

ChenQiYuan.exe

pid	Process
608	ChenQiYuan.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:

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.execmd.exetimeout.execmd.exeschtasks.exeChenQiYuan.exe

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

Delays execution with timeout.exe 1 IoCs

evasion

Processes:

timeout.exe

pid	Process
4420	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
2332	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe

pid	Process
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exeChenQiYuan.exe

description	pid	Process
Token: SeDebugPrivilege	3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
Token: SeDebugPrivilege	608	ChenQiYuan.exe
Token: SeDebugPrivilege	608	ChenQiYuan.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.execmd.execmd.exe

description	pid	Process	procid_target
PID 3500 wrote to memory of 1156	3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	90
PID 3500 wrote to memory of 1156	3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	90
PID 3500 wrote to memory of 1156	3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	90
PID 3500 wrote to memory of 3396	3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	92
PID 3500 wrote to memory of 3396	3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	92
PID 3500 wrote to memory of 3396	3500	4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe	92
PID 3396 wrote to memory of 4420	3396	cmd.exe	94
PID 3396 wrote to memory of 4420	3396	cmd.exe	94
PID 3396 wrote to memory of 4420	3396	cmd.exe	94
PID 1156 wrote to memory of 2332	1156	cmd.exe	95
PID 1156 wrote to memory of 2332	1156	cmd.exe	95
PID 1156 wrote to memory of 2332	1156	cmd.exe	95
PID 3396 wrote to memory of 608	3396	cmd.exe	100
PID 3396 wrote to memory of 608	3396	cmd.exe	100
PID 3396 wrote to memory of 608	3396	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe
"C:\Users\Admin\AppData\Local\Temp\4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3500
- 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:1156
- - 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:2332
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8DF8.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3396
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4420
- - 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:608

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

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8DF8.tmp.bat

Filesize
154B

MD5
63237fc512d85d4c72f384271ba4b572

SHA1
c890d1d6c8477f0778d1a11041d7a04d98eb5bc4

SHA256
6f5c96baae43665d6cdb504647f77f1e2bfd16bdb94c4f1cf809d5e9d5657484

SHA512
b2294986ee52c46ce79fc6484a2d9e5b1620723554a5994ce9fc3b54c09fc704c00ea67bd5af5d924d18d85fc66a39fb8de993b3224d20f99de9750b10344b4a

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

Filesize
52KB

MD5
43bf2b1b12150aa4f795cb6d6eff697f

SHA1
ac0ef971638009f16c8d5f2d30cb9baf656d2045

SHA256
4b2e910c45f99294750c8adb3e799c39a1adfd0d9fcfdc7f36773037477ec977

SHA512
0d052d66436d3590c624b4098fb21a9064497d24ca5997a88ae3159f2ad675733c8dcf7f6dc8b44b05b6a68d4c68b6af56d52bfe6c65b90c586e241bf074a5f4

Download Submit
memory/608-13-0x0000000074F40000-0x00000000756F0000-memory.dmp

Filesize
7.7MB

Download
memory/608-14-0x0000000074F40000-0x00000000756F0000-memory.dmp

Filesize
7.7MB

Download
memory/3500-0-0x0000000074FFE000-0x0000000074FFF000-memory.dmp

Filesize
4KB

Download
memory/3500-1-0x0000000000260000-0x0000000000274000-memory.dmp

Filesize
80KB

Download
memory/3500-2-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download
memory/3500-3-0x0000000004B80000-0x0000000004C1C000-memory.dmp

Filesize
624KB

Download
memory/3500-8-0x0000000074FF0000-0x00000000757A0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads