asyncrat | ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197

General

Target
ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
Size 45KB
Sample260907-pc9v9agg38
SHA256 ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197
MD5 5a38db5bff5bc8da32fec350c1114879
SHA1 0fa6ca8eed6113efa1ad8ee8e2c671dccc730733
SHA512 7ef16d1a9bacedc34e4c6ce6e6ce14239c49b63a5ca395b0d64cd50bcee3fac952ec18140d54591a6c7c7e701a7e2aa0188d3e64e2f05ce1fc0d7d55ee8b01c2
SSDEEP 768:5udApTNctooWUS7C+mo2qtm/NYssPJZOPIczzjbtgX4iTjHsZZTeJ2PBDZ0x:5udApTNmU2ZHIf3cz3b6XVTTsXqCd0x
TLSH
T119231B0037E8822BF2BE4F7898F26145467AF6673603D58E1CC4519B4623FC6CA526FE
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

vnsextop1.com:80
vnsextop1.com:22
vnsextop1.com:8080
vnsextop1.com:8880
vnsextop1.com:2052
vnsextop1.com:2082
vnsextop1.com:2086
vnsextop1.com:2095
vnsextop1.com:443
vnsextop1.com:2053
vnsextop1.com:2083
vnsextop1.com:2087
vnsextop1.com:2096
vnsextop1.com:8443
www.vnsextop1.com:80
www.vnsextop1.com:22
www.vnsextop1.com:8080
www.vnsextop1.com:8880
www.vnsextop1.com:2052
www.vnsextop1.com:2082
www.vnsextop1.com:2086
www.vnsextop1.com:2095
www.vnsextop1.com:443
www.vnsextop1.com:2053
www.vnsextop1.com:2083
www.vnsextop1.com:2087
www.vnsextop1.com:2096
www.vnsextop1.com:8443
locky.vnsextop1.com:80
locky.vnsextop1.com:22
locky.vnsextop1.com:8080
locky.vnsextop1.com:8880
locky.vnsextop1.com:2052
locky.vnsextop1.com:2082
locky.vnsextop1.com:2086
locky.vnsextop1.com:2095
locky.vnsextop1.com:443
locky.vnsextop1.com:2053
locky.vnsextop1.com:2083
locky.vnsextop1.com:2087
locky.vnsextop1.com:2096
locky.vnsextop1.com:8443
conficker.vnsextop1.com:80
conficker.vnsextop1.com:22
conficker.vnsextop1.com:8080
conficker.vnsextop1.com:8880
conficker.vnsextop1.com:2052
conficker.vnsextop1.com:2082
conficker.vnsextop1.com:2086
conficker.vnsextop1.com:2095
conficker.vnsextop1.com:443
conficker.vnsextop1.com:2053
conficker.vnsextop1.com:2083
conficker.vnsextop1.com:2087
conficker.vnsextop1.com:2096
conficker.vnsextop1.com:8443

Mutex

LmutPEQNiTkx

Attributes

delay
0
install
true
install_file
4to1wp.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/0x0005000000023299-8.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-1-5-21-2370214745-1838013427-2987045292-1000\Control Panel\International\Geo\Nation	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe

Executes dropped EXE 2 IoCs

pid	Process
2888	4to1wp.exe
332	4to1wp.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	31	104.18.31.167:22	2888	4to1wp.exe
SSH destination	36	104.18.30.167:22	2888	4to1wp.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
4536	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	4to1wp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4to1wp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3020	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
2604	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
Token: SeDebugPrivilege	2888	4to1wp.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4128 wrote to memory of 2752	4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe	84
PID 4128 wrote to memory of 4536	4128	ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe	86
PID 4536 wrote to memory of 3020	4536	cmd.exe	88
PID 2752 wrote to memory of 2604	2752	cmd.exe	89
PID 4536 wrote to memory of 332	4536	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe
"C:\Users\Admin\AppData\Local\Temp\ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4128
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "4to1wp" /tr '"C:\Users\Admin\AppData\Roaming\4to1wp.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "4to1wp" /tr '"C:\Users\Admin\AppData\Roaming\4to1wp.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2604
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp272A.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4536
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3020
- - C:\Users\Admin\AppData\Roaming\4to1wp.exe
    "C:\Users\Admin\AppData\Roaming\4to1wp.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:332

C:\Users\Admin\AppData\Roaming\4to1wp.exe
"C:\Users\Admin\AppData\Roaming\4to1wp.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2888

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

tmp272A.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp272A.tmp.bat
Size 150B
SHA256 41946000bed5e31ea24c15c7112c8bd0d966f6e79504b411aaec751755f40d85
MD5 e24d142647c48566f442efa04f3609fb
SHA1 d541a062857ccfdaf58740879dea839c0c44c8c9
SHA512 3347448a4399919c584cc635c03052829edaab4e1fdba1362212d980954b7d296c95dc2378dc5b7b204ce57ba98b8a4b85673133822c5119ceaa3c6bf9f1c105
TLSH
T1EDC02B42B1CBEB1E3906141306FAD98CD1776D9A3F40BB40CB08404D2280858F3D9342
MD5 SHA1 SHA512 TLSH

Submit Download

4to1wp.exe

Path C:\Users\Admin\AppData\Roaming\4to1wp.exe
Size 45KB
SHA256 ad6e591749eddb4f2b9566d9ce222d93b5e5427885bebb8699314b3805376197
MD5 5a38db5bff5bc8da32fec350c1114879
SHA1 0fa6ca8eed6113efa1ad8ee8e2c671dccc730733
SHA512 7ef16d1a9bacedc34e4c6ce6e6ce14239c49b63a5ca395b0d64cd50bcee3fac952ec18140d54591a6c7c7e701a7e2aa0188d3e64e2f05ce1fc0d7d55ee8b01c2
SSDEEP 768:5udApTNctooWUS7C+mo2qtm/NYssPJZOPIczzjbtgX4iTjHsZZTeJ2PBDZ0x:5udApTNmU2ZHIf3cz3b6XVTTsXqCd0x
TLSH
T119231B0037E8822BF2BE4F7898F26145467AF6673603D58E1CC4519B4623FC6CA526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2888-10-0x0000000005000000-0x0000000005010000-memory.dmp

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memory/2888-13-0x0000000005000000-0x0000000005010000-memory.dmp

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memory/4128-0-0x0000000000E00000-0x0000000000E12000-memory.dmp

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memory/4128-1-0x00000000058C0000-0x00000000058D0000-memory.dmp

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memory/4128-2-0x00000000058D0000-0x000000000596C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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