asyncrat | 311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714

General

Target
311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
Size 45KB
Sample260804-2dvtyafj7t
SHA256 311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714
MD5 c00489ba81a204f5505aa5a910b8d83b
SHA1 e0fdf6388b8bee08474382185aafcd0a5cd25368
SHA512 2eefc939925845b7d48a01ed806c9906ecc38bc3711c1b2550295decfa41974d31bb1f1b6c23edf6b79ae07138308ad0ec7cdb1b32a10b0cfe86f67de0d10007
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlyBlte40WMOPI0IzjbFgX+ijLwKPdITojWpBDZMx:wuDWZTpMZSB212UM30I3bCXHPwK7jedO
TLSH
T11C232B003BE8812BF2BE4F78ACF25145867AF5636603D58A1CC452DB5713FC69A426FE
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

C2

phimdugai.blog:80
phimdugai.blog:22
phimdugai.blog:8080
phimdugai.blog:8880
phimdugai.blog:2052
phimdugai.blog:2082
phimdugai.blog:2086
phimdugai.blog:2095
phimdugai.blog:443
phimdugai.blog:2053
phimdugai.blog:2083
phimdugai.blog:2087
phimdugai.blog:2096
phimdugai.blog:8443
www.phimdugai.blog:80
www.phimdugai.blog:22
www.phimdugai.blog:8080
www.phimdugai.blog:8880
www.phimdugai.blog:2052
www.phimdugai.blog:2082
www.phimdugai.blog:2086
www.phimdugai.blog:2095
www.phimdugai.blog:443
www.phimdugai.blog:2053
www.phimdugai.blog:2083
www.phimdugai.blog:2087
www.phimdugai.blog:2096
www.phimdugai.blog:8443
nimda.phimdugai.blog:80
nimda.phimdugai.blog:22
nimda.phimdugai.blog:8080
nimda.phimdugai.blog:8880
nimda.phimdugai.blog:2052
nimda.phimdugai.blog:2082
nimda.phimdugai.blog:2086
nimda.phimdugai.blog:2095
nimda.phimdugai.blog:443
nimda.phimdugai.blog:2053
nimda.phimdugai.blog:2083
nimda.phimdugai.blog:2087
nimda.phimdugai.blog:2096
nimda.phimdugai.blog:8443
trickbot.phimdugai.blog:80
trickbot.phimdugai.blog:22
trickbot.phimdugai.blog:8080
trickbot.phimdugai.blog:8880
trickbot.phimdugai.blog:2052
trickbot.phimdugai.blog:2082
trickbot.phimdugai.blog:2086
trickbot.phimdugai.blog:2095
trickbot.phimdugai.blog:443
trickbot.phimdugai.blog:2053
trickbot.phimdugai.blog:2083
trickbot.phimdugai.blog:2087
trickbot.phimdugai.blog:2096
trickbot.phimdugai.blog:8443

Mutex

Whu5yuMnunPK

Attributes

delay
0
install
true
install_file
f4fro.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 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x000300000001e6de-8.dat	family_asyncrat
behavioral1/memory/4312-13-0x0000000005150000-0x0000000005160000-memory.dmp	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1788976790-1541110888-1636651838-1000\Control Panel\International\Geo\Nation	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe

Executes dropped EXE 2 IoCs

pid	Process
4312	f4fro.exe
4664	f4fro.exe

Outbound SSH connection to public host 2 TTPs 2 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	pid	Process
SSH destination	67	104.21.56.197:22	4312	f4fro.exe
SSH destination	69	172.67.187.216:22	4312	f4fro.exe

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
3100	cmd.exe
2752	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	f4fro.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f4fro.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3824	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
4384	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
Token: SeDebugPrivilege	4312	f4fro.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2964 wrote to memory of 3100	2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe	87
PID 2964 wrote to memory of 2752	2964	311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe	89
PID 2752 wrote to memory of 3824	2752	cmd.exe	91
PID 3100 wrote to memory of 4384	3100	cmd.exe	92
PID 2752 wrote to memory of 4664	2752	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe
"C:\Users\Admin\AppData\Local\Temp\311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2964
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "f4fro" /tr '"C:\Users\Admin\AppData\Roaming\f4fro.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3100
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "f4fro" /tr '"C:\Users\Admin\AppData\Roaming\f4fro.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4384
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp318B.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3824
- - C:\Users\Admin\AppData\Roaming\f4fro.exe
    "C:\Users\Admin\AppData\Roaming\f4fro.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4664

C:\Users\Admin\AppData\Roaming\f4fro.exe
"C:\Users\Admin\AppData\Roaming\f4fro.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4312

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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tmp318B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp318B.tmp.bat
Size 149B
SHA256 30cdc8080c05224ea52da56ba63d5cc239c43f1105f9f572ccba2e72b1a9d8e2
MD5 94e6e6963eaabe79fab0006d5b99a0b5
SHA1 070d1c24f0d2f200ff4637db7dbc716004406a62
SHA512 8092960f73eac31698c6f07c442e96ee399653dcbb937f5a5f39af6da8ab990edd68aa5367bcb92fba86de5de1e81391ccd043bbaa148a9a4877e7bd148b30f7
TLSH
T1B2C08C5365C6AA0E290A285722BE948D91A268593E40AB009784400D768184CE099245
MD5 SHA1 SHA512 TLSH

Submit Download

f4fro.exe

Path C:\Users\Admin\AppData\Roaming\f4fro.exe
Size 45KB
SHA256 311ee46c7be68fc09624f7f2accf244143f6b0ba8492c97badbb4916771b4714
MD5 c00489ba81a204f5505aa5a910b8d83b
SHA1 e0fdf6388b8bee08474382185aafcd0a5cd25368
SHA512 2eefc939925845b7d48a01ed806c9906ecc38bc3711c1b2550295decfa41974d31bb1f1b6c23edf6b79ae07138308ad0ec7cdb1b32a10b0cfe86f67de0d10007
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlyBlte40WMOPI0IzjbFgX+ijLwKPdITojWpBDZMx:wuDWZTpMZSB212UM30I3bCXHPwK7jedO
TLSH
T11C232B003BE8812BF2BE4F78ACF25145867AF5636603D58A1CC452DB5713FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2964-0-0x0000000000FA0000-0x0000000000FB2000-memory.dmp

Download

memory/2964-1-0x00000000059D0000-0x00000000059E0000-memory.dmp

Download

memory/2964-2-0x00000000059E0000-0x0000000005A7C000-memory.dmp

Download

memory/4312-10-0x0000000005150000-0x0000000005160000-memory.dmp

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memory/4312-13-0x0000000005150000-0x0000000005160000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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