asyncrat | f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af

Analysis

max time kernel
148s
max time network
152s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
16/08/2026, 17:13

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
Size 45KB
Sample260816-vrvmrssfpb
SHA256 f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af
MD5 0804450541b2d13b610c8b678dcefebe
SHA1 2551474646145dc5a53a615f4456457c933e36cd
SHA512 80646117960bc6eb9f341ddbf548e36ccc1ffe615dae56650cbd0681b7a3476c70e138959679618e29011c01d41dc9e690629caf6fe43604cfee6bfc3a96416e
SSDEEP 768:ku40ZTX3uXTaWUgzW0mo2qwtNd3u40cMOPI04zjb5gX6i5jbE1Tj1pBDZMx:ku40ZTXEb278+M3043bWXDJiTR3dMx
TLSH
T126232A003BE8812BF2BE4F78A9F26145867AF1736603D54E1CC452DB5613FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

e.streamforester.name:80
e.streamforester.name:22
e.streamforester.name:8080
e.streamforester.name:8880
e.streamforester.name:2052
e.streamforester.name:2082
e.streamforester.name:2086
e.streamforester.name:2095
e.streamforester.name:443
e.streamforester.name:2053
e.streamforester.name:2083
e.streamforester.name:2087
e.streamforester.name:2096
e.streamforester.name:8443
www.e.streamforester.name:80
www.e.streamforester.name:22
www.e.streamforester.name:8080
www.e.streamforester.name:8880
www.e.streamforester.name:2052
www.e.streamforester.name:2082
www.e.streamforester.name:2086
www.e.streamforester.name:2095
www.e.streamforester.name:443
www.e.streamforester.name:2053
www.e.streamforester.name:2083
www.e.streamforester.name:2087
www.e.streamforester.name:2096
www.e.streamforester.name:8443
azorult.e.streamforester.name:80
azorult.e.streamforester.name:22
azorult.e.streamforester.name:8080
azorult.e.streamforester.name:8880
azorult.e.streamforester.name:2052
azorult.e.streamforester.name:2082
azorult.e.streamforester.name:2086
azorult.e.streamforester.name:2095
azorult.e.streamforester.name:443
azorult.e.streamforester.name:2053
azorult.e.streamforester.name:2083
azorult.e.streamforester.name:2087
azorult.e.streamforester.name:2096
azorult.e.streamforester.name:8443
cryptolocker.e.streamforester.name:80
cryptolocker.e.streamforester.name:22
cryptolocker.e.streamforester.name:8080
cryptolocker.e.streamforester.name:8880
cryptolocker.e.streamforester.name:2052
cryptolocker.e.streamforester.name:2082
cryptolocker.e.streamforester.name:2086
cryptolocker.e.streamforester.name:2095
cryptolocker.e.streamforester.name:443
cryptolocker.e.streamforester.name:2053
cryptolocker.e.streamforester.name:2083
cryptolocker.e.streamforester.name:2087
cryptolocker.e.streamforester.name:2096
cryptolocker.e.streamforester.name:8443

Mutex

f7E5usiayklr

Attributes

delay
0
install
true
install_file
fkn2r.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x000e00000001c550-10.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
4764	fkn2r.exe
1692	fkn2r.exe

Outbound SSH connection to public host 2 TTPs 3 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc
SSH destination	12	104.26.5.5:22
SSH destination	3	172.67.70.147:22
SSH destination	7	104.26.4.5:22

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3324	cmd.exe
3780	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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

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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fkn2r.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fkn2r.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3988	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

pid	Process
472	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 3324	2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe	88
PID 2020 wrote to memory of 3780	2020	f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe	90
PID 3780 wrote to memory of 3988	3780	cmd.exe	92
PID 3324 wrote to memory of 472	3324	cmd.exe	93
PID 3780 wrote to memory of 1692	3780	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe
"C:\Users\Admin\AppData\Local\Temp\f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2020
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "fkn2r" /tr '"C:\Users\Admin\AppData\Roaming\fkn2r.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3324
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "fkn2r" /tr '"C:\Users\Admin\AppData\Roaming\fkn2r.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:472
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpEC79.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3780
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3988
- - C:\Users\Admin\AppData\Roaming\fkn2r.exe
    "C:\Users\Admin\AppData\Roaming\fkn2r.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1692

C:\Users\Admin\AppData\Roaming\fkn2r.exe
"C:\Users\Admin\AppData\Roaming\fkn2r.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
PID:4764

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Windows Command Shell

T1059.003

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Network Service Discovery

T1046

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

T1572

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

tmpEC79.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpEC79.tmp.bat
Size 149B
SHA256 69b00d75d5342b42cdfdac5e204a9d8b88a149836ebaebd37c428482c93137ec
MD5 9cbbd131c777f948bb69aa2d59d525ba
SHA1 923957677305ae3847eeefc276bb371a2a173ff2
SHA512 78fe62d711ed42cb04cbacd9b8fec67ffad18e126c2ea91dc47baa8fc778df5d1cc542d28ffd83da1114c9ff1253a78f837d77bfe9d4d20cecc5483e955b1812
TLSH
T1F4C08C5355C7EA1E3905181312BAD48CA1766C293E88BB008704400D5280848E0AA341
MD5 SHA1 SHA512 TLSH

Submit Download

fkn2r.exe

Path C:\Users\Admin\AppData\Roaming\fkn2r.exe
Size 45KB
SHA256 f4f2cb776803707eed93cb9df8186af02ae51734803e8e6b2f7a2e6a4559f3af
MD5 0804450541b2d13b610c8b678dcefebe
SHA1 2551474646145dc5a53a615f4456457c933e36cd
SHA512 80646117960bc6eb9f341ddbf548e36ccc1ffe615dae56650cbd0681b7a3476c70e138959679618e29011c01d41dc9e690629caf6fe43604cfee6bfc3a96416e
SSDEEP 768:ku40ZTX3uXTaWUgzW0mo2qwtNd3u40cMOPI04zjb5gX6i5jbE1Tj1pBDZMx:ku40ZTXEb278+M3043bWXDJiTR3dMx
TLSH
T126232A003BE8812BF2BE4F78A9F26145867AF1736603D54E1CC452DB5613FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2020-0-0x0000000074E22000-0x0000000074E23000-memory.dmp

Download

memory/2020-1-0x0000000000BC0000-0x0000000000BD2000-memory.dmp

Download

memory/2020-2-0x0000000074E10000-0x00000000755CC000-memory.dmp

Download

memory/2020-3-0x00000000055B0000-0x000000000564C000-memory.dmp

Download

memory/2020-8-0x0000000074E10000-0x00000000755CC000-memory.dmp

Download

memory/4764-12-0x0000000074CA0000-0x000000007545C000-memory.dmp

Download

memory/4764-14-0x0000000074CA0000-0x000000007545C000-memory.dmp

Download