asyncrat | a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529

General

Target
a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
Size 45KB
Sample260804-16cndser5x
SHA256 a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529
MD5 194ecc54b1895d1bd9a56adfc2e7fb7b
SHA1 78ba1210dfef9b501b96a6324741878f89ecf40f
SHA512 64adab7f39f90d10e7ec03581256c3ba0e07f5912589958f6c1ddac39c3bcffaa3a42a557ac374ff1b54ee083cfa2558c40d4bca9801dd604fa19273030e4b69
SSDEEP 768:5uSy6pTpwrSWWUE3/WImo2qNi9YSkq/zNOPIFzjb+gd3iHy2ieU+rDp5y5uGmnBU:5uSy6pTpoo2PaVC3F3bBdSPNU6DHUmBU
TLSH
T1A0233B003BE9C12BF2BE5F789CF26145867AF5633603D6491CC4529B5723BC68A426FE
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

xemsexmy.org:80
xemsexmy.org:22
xemsexmy.org:8080
xemsexmy.org:8880
xemsexmy.org:2052
xemsexmy.org:2082
xemsexmy.org:2086
xemsexmy.org:2095
xemsexmy.org:443
xemsexmy.org:2053
xemsexmy.org:2083
xemsexmy.org:2087
xemsexmy.org:2096
xemsexmy.org:8443
www.xemsexmy.org:80
www.xemsexmy.org:22
www.xemsexmy.org:8080
www.xemsexmy.org:8880
www.xemsexmy.org:2052
www.xemsexmy.org:2082
www.xemsexmy.org:2086
www.xemsexmy.org:2095
www.xemsexmy.org:443
www.xemsexmy.org:2053
www.xemsexmy.org:2083
www.xemsexmy.org:2087
www.xemsexmy.org:2096
www.xemsexmy.org:8443
clop.xemsexmy.org:80
clop.xemsexmy.org:22
clop.xemsexmy.org:8080
clop.xemsexmy.org:8880
clop.xemsexmy.org:2052
clop.xemsexmy.org:2082
clop.xemsexmy.org:2086
clop.xemsexmy.org:2095
clop.xemsexmy.org:443
clop.xemsexmy.org:2053
clop.xemsexmy.org:2083
clop.xemsexmy.org:2087
clop.xemsexmy.org:2096
clop.xemsexmy.org:8443
hacker.xemsexmy.org:80
hacker.xemsexmy.org:22
hacker.xemsexmy.org:8080
hacker.xemsexmy.org:8880
hacker.xemsexmy.org:2052
hacker.xemsexmy.org:2082
hacker.xemsexmy.org:2086
hacker.xemsexmy.org:2095
hacker.xemsexmy.org:443
hacker.xemsexmy.org:2053
hacker.xemsexmy.org:2083
hacker.xemsexmy.org:2087
hacker.xemsexmy.org:2096
hacker.xemsexmy.org:8443

Mutex

ShQW0acfotcC

Attributes

delay
0
install
true
install_file
zk3zm5j.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/0x000300000001e69b-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-1-5-21-2937465464-4167303362-2236413517-1000\Control Panel\International\Geo\Nation	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe

Executes dropped EXE 2 IoCs

pid	Process
4088	zk3zm5j.exe
1328	zk3zm5j.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	47	172.67.152.224:22	4088	zk3zm5j.exe
SSH destination	54	104.21.32.163:22	4088	zk3zm5j.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
1940	cmd.exe
4960	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	zk3zm5j.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zk3zm5j.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5080	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
3788	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
Token: SeDebugPrivilege	4088	zk3zm5j.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 784 wrote to memory of 1940	784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe	86
PID 784 wrote to memory of 4960	784	a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe	88
PID 4960 wrote to memory of 5080	4960	cmd.exe	90
PID 1940 wrote to memory of 3788	1940	cmd.exe	91
PID 4960 wrote to memory of 1328	4960	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe
"C:\Users\Admin\AppData\Local\Temp\a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:784
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "zk3zm5j" /tr '"C:\Users\Admin\AppData\Roaming\zk3zm5j.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1940
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "zk3zm5j" /tr '"C:\Users\Admin\AppData\Roaming\zk3zm5j.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3788
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpD91A.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4960
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5080
- - C:\Users\Admin\AppData\Roaming\zk3zm5j.exe
    "C:\Users\Admin\AppData\Roaming\zk3zm5j.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1328

C:\Users\Admin\AppData\Roaming\zk3zm5j.exe
"C:\Users\Admin\AppData\Roaming\zk3zm5j.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4088

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

tmpD91A.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpD91A.tmp.bat
Size 151B
SHA256 0036ee97079c03bddfd3fb60d2efa62cb95aa1df7c7d9df4f012de6c70a35b31
MD5 80af8933fa6c455dd61583511e53931f
SHA1 9a4070ab627e1108117e894ad94968a3109c4270
SHA512 2034768c1d4cefbf2de8a17a09cbfa1f75cc139e3895eff5c835a580b3f23311de3f3e1ad3ca1e0ca5b93f0e90843ee36b0c0b972e093c621c5ccdb19fcc16e2
TLSH
T1CAC02B6251C6EA2F2805141302FAD89E91736D993F40FF00CB44854E2280458F0EA345
MD5 SHA1 SHA512 TLSH

Submit Download

zk3zm5j.exe

Path C:\Users\Admin\AppData\Roaming\zk3zm5j.exe
Size 45KB
SHA256 a6ca6ea188ba3e79936af24b24d3bd56e60c27757f7d06bbd6b6b6809cf07529
MD5 194ecc54b1895d1bd9a56adfc2e7fb7b
SHA1 78ba1210dfef9b501b96a6324741878f89ecf40f
SHA512 64adab7f39f90d10e7ec03581256c3ba0e07f5912589958f6c1ddac39c3bcffaa3a42a557ac374ff1b54ee083cfa2558c40d4bca9801dd604fa19273030e4b69
SSDEEP 768:5uSy6pTpwrSWWUE3/WImo2qNi9YSkq/zNOPIFzjb+gd3iHy2ieU+rDp5y5uGmnBU:5uSy6pTpoo2PaVC3F3bBdSPNU6DHUmBU
TLSH
T1A0233B003BE9C12BF2BE5F789CF26145867AF5633603D6491CC4529B5723BC68A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/784-0-0x00000000009E0000-0x00000000009F2000-memory.dmp

Download

memory/784-1-0x00000000054A0000-0x00000000054B0000-memory.dmp

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memory/784-2-0x0000000005390000-0x000000000542C000-memory.dmp

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memory/4088-10-0x0000000004C50000-0x0000000004C60000-memory.dmp

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memory/4088-13-0x0000000004C50000-0x0000000004C60000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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