asyncrat | 8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb

General

Target
8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
Size 45KB
Sample260905-ndldlszwhy
SHA256 8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb
MD5 b43e58dc2f24500ac25486df713598f4
SHA1 82dbcd759c0a387f4b60c9c31be14719d9e6af39
SHA512 31c3522c44653b0aa8ddf381696583aaa017eb372c62a7d1e3ba046bb5e58d4d4d8ab67162c788f0e1276821db03a7c7ec471566220bba02929ef9721f5a7f1f
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q13maPol53APIkzjbbgX3iNQP22mdHs05d/KBDZcx:RuxkJTgip22fob3lk3bkXS32hK/Udcx
TLSH
T174231B003BE8812AF2BE4F789DF26145867AF2677603D6491CC451DB1713FC68A426FD
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

phimsexvai.net:80
phimsexvai.net:22
phimsexvai.net:8080
phimsexvai.net:8880
phimsexvai.net:2052
phimsexvai.net:2082
phimsexvai.net:2086
phimsexvai.net:2095
phimsexvai.net:443
phimsexvai.net:2053
phimsexvai.net:2083
phimsexvai.net:2087
phimsexvai.net:2096
phimsexvai.net:8443
www.phimsexvai.net:80
www.phimsexvai.net:22
www.phimsexvai.net:8080
www.phimsexvai.net:8880
www.phimsexvai.net:2052
www.phimsexvai.net:2082
www.phimsexvai.net:2086
www.phimsexvai.net:2095
www.phimsexvai.net:443
www.phimsexvai.net:2053
www.phimsexvai.net:2083
www.phimsexvai.net:2087
www.phimsexvai.net:2096
www.phimsexvai.net:8443
remote.phimsexvai.net:80
remote.phimsexvai.net:22
remote.phimsexvai.net:8080
remote.phimsexvai.net:8880
remote.phimsexvai.net:2052
remote.phimsexvai.net:2082
remote.phimsexvai.net:2086
remote.phimsexvai.net:2095
remote.phimsexvai.net:443
remote.phimsexvai.net:2053
remote.phimsexvai.net:2083
remote.phimsexvai.net:2087
remote.phimsexvai.net:2096
remote.phimsexvai.net:8443
formbook.phimsexvai.net:80
formbook.phimsexvai.net:22
formbook.phimsexvai.net:8080
formbook.phimsexvai.net:8880
formbook.phimsexvai.net:2052
formbook.phimsexvai.net:2082
formbook.phimsexvai.net:2086
formbook.phimsexvai.net:2095
formbook.phimsexvai.net:443
formbook.phimsexvai.net:2053
formbook.phimsexvai.net:2083
formbook.phimsexvai.net:2087
formbook.phimsexvai.net:2096
formbook.phimsexvai.net:8443

Mutex

s2GriP9ODDRh

Attributes

delay
0
install
true
install_file
1cutc1hx.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
behavioral1/files/0x000b0000000240f5-8.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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe

Executes dropped EXE 2 IoCs

pid	Process
4808	1cutc1hx.exe
4884	1cutc1hx.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	38	172.67.206.230:22	4808	1cutc1hx.exe
SSH destination	48	104.21.15.201:22	4808	1cutc1hx.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
2324	cmd.exe
3040	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1cutc1hx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1cutc1hx.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3584	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
2912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
Token: SeDebugPrivilege	4808	1cutc1hx.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2324	2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe	85
PID 2236 wrote to memory of 3040	2236	8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe	87
PID 3040 wrote to memory of 3584	3040	cmd.exe	89
PID 2324 wrote to memory of 2912	2324	cmd.exe	90
PID 3040 wrote to memory of 4884	3040	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe
"C:\Users\Admin\AppData\Local\Temp\8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "1cutc1hx" /tr '"C:\Users\Admin\AppData\Roaming\1cutc1hx.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "1cutc1hx" /tr '"C:\Users\Admin\AppData\Roaming\1cutc1hx.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2912
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp215E.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3040
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3584
- - C:\Users\Admin\AppData\Roaming\1cutc1hx.exe
    "C:\Users\Admin\AppData\Roaming\1cutc1hx.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4884

C:\Users\Admin\AppData\Roaming\1cutc1hx.exe
"C:\Users\Admin\AppData\Roaming\1cutc1hx.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4808

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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Downloads

tmp215E.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp215E.tmp.bat
Size 152B
SHA256 dc9ff9e931e474b7cfa9d3b27fee37307e3394a6d85a78959312c824209e6df6
MD5 a3d08c66d2b8f391ebf4ad29f70123df
SHA1 b39af0addb3e4c987ffa899ba057131abc9cdc0f
SHA512 d201a549bdb28fac6ae8c6a4a46c10d58e272be5364c75632a0a54a78a6ac3763a11122277f40c8950046da35af71581cf940e3b2158604e13abf3722630f990
TLSH
T1F0C02B53A5CAFE5F2805542302FAD88CE5B6AD993F40BB00D308441D2290448F0DD341
MD5 SHA1 SHA512 TLSH

Submit Download

1cutc1hx.exe

Path C:\Users\Admin\AppData\Roaming\1cutc1hx.exe
Size 45KB
SHA256 8af01f3dcb7cd1ba2cc48d4b7ebfd70fd7650ba550b9d62819e68ea2d480cefb
MD5 b43e58dc2f24500ac25486df713598f4
SHA1 82dbcd759c0a387f4b60c9c31be14719d9e6af39
SHA512 31c3522c44653b0aa8ddf381696583aaa017eb372c62a7d1e3ba046bb5e58d4d4d8ab67162c788f0e1276821db03a7c7ec471566220bba02929ef9721f5a7f1f
SSDEEP 768:RuxkJTVmU5EkWUGMKSmo2q13maPol53APIkzjbbgX3iNQP22mdHs05d/KBDZcx:RuxkJTgip22fob3lk3bkXS32hK/Udcx
TLSH
T174231B003BE8812AF2BE4F789DF26145867AF2677603D6491CC451DB1713FC68A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2236-0-0x0000000000BC0000-0x0000000000BD2000-memory.dmp

Download

memory/2236-1-0x00000000055E0000-0x00000000055F0000-memory.dmp

Download

memory/2236-2-0x00000000055F0000-0x000000000568C000-memory.dmp

Download

memory/4808-10-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Download

memory/4808-13-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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