asyncrat | c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd

General

Target
c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
Size 45KB
Sample260804-atv14adr2x
SHA256 c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd
MD5 fced9a25545878010615019154c86e8f
SHA1 3adb1aefd26481f42fc9451852dd8d344890a462
SHA512 43785ffe39554f705233e3b669bb212f3c8f9d7df0656a7290a8b1596f92361278a299f15f1d61c8f616aed44ff4898ac87ebaadfd3eb5cc63ef81e96af97b65
SSDEEP 768:5udApTNctooWUS7C+mo2qt5HO9YjoHPICYzjbKgX3iPTSJShBJRXrHNBDZ0x:5udApTNmU2Z6kgCY3bdXSPGJ65Dd0x
TLSH
T1AA230A0037E8822BF2BE5F78A9F26145867AF2633603D5891CC451D75723FC6CA426EE
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
blacklotus.xemsexmy.org:80
blacklotus.xemsexmy.org:22
blacklotus.xemsexmy.org:8080
blacklotus.xemsexmy.org:8880
blacklotus.xemsexmy.org:2052
blacklotus.xemsexmy.org:2082
blacklotus.xemsexmy.org:2086
blacklotus.xemsexmy.org:2095
blacklotus.xemsexmy.org:443
blacklotus.xemsexmy.org:2053
blacklotus.xemsexmy.org:2083
blacklotus.xemsexmy.org:2087
blacklotus.xemsexmy.org:2096
blacklotus.xemsexmy.org:8443
industroyer.xemsexmy.org:80
industroyer.xemsexmy.org:22
industroyer.xemsexmy.org:8080
industroyer.xemsexmy.org:8880
industroyer.xemsexmy.org:2052
industroyer.xemsexmy.org:2082
industroyer.xemsexmy.org:2086
industroyer.xemsexmy.org:2095
industroyer.xemsexmy.org:443
industroyer.xemsexmy.org:2053
industroyer.xemsexmy.org:2083
industroyer.xemsexmy.org:2087
industroyer.xemsexmy.org:2096
industroyer.xemsexmy.org:8443

Mutex

xBSH3cpMtOW9

Attributes

delay
0
install
true
install_file
l25n1z.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/0x000300000001e68e-8.dat	family_asyncrat
behavioral1/memory/4296-10-0x0000000005560000-0x0000000005570000-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-1-5-21-1074038928-2032447174-945360078-1000\Control Panel\International\Geo\Nation	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe

Executes dropped EXE 2 IoCs

pid	Process
4296	l25n1z.exe
3596	l25n1z.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	33	172.67.152.224:22	4296	l25n1z.exe
SSH destination	43	104.21.32.163:22	4296	l25n1z.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
1240	cmd.exe
2120	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	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	l25n1z.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	l25n1z.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4240	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
468	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
Token: SeDebugPrivilege	4296	l25n1z.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 1240	4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe	87
PID 4036 wrote to memory of 2120	4036	c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe	89
PID 2120 wrote to memory of 4240	2120	cmd.exe	91
PID 1240 wrote to memory of 468	1240	cmd.exe	92
PID 2120 wrote to memory of 3596	2120	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe
"C:\Users\Admin\AppData\Local\Temp\c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "l25n1z" /tr '"C:\Users\Admin\AppData\Roaming\l25n1z.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1240
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "l25n1z" /tr '"C:\Users\Admin\AppData\Roaming\l25n1z.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:468
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6E17.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2120
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4240
- - C:\Users\Admin\AppData\Roaming\l25n1z.exe
    "C:\Users\Admin\AppData\Roaming\l25n1z.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3596

C:\Users\Admin\AppData\Roaming\l25n1z.exe
"C:\Users\Admin\AppData\Roaming\l25n1z.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4296

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

tmp6E17.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp6E17.tmp.bat
Size 150B
SHA256 817792390a6a33db7d1e92970e7cbf2c7cf18d3b31e512670c57d3f001ee1e51
MD5 fe5e9de6ef0b65356c5e72fceb90f697
SHA1 3f815fd7fefe05196a3edd284e3981937f052c68
SHA512 3fa77f4534c45a42ff99783c0aa4c53aa9c7002da00562dd3754215474e47fcdb5c419e9d395f8129d28395232b09edfc57d747990a888930b6711d1c6cceb17
TLSH
T14CC02B4355C5EB0E3C09141302FBD5ACD1B26D5D3F40FF40C744410D1280459F0EA341
MD5 SHA1 SHA512 TLSH

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l25n1z.exe

Path C:\Users\Admin\AppData\Roaming\l25n1z.exe
Size 45KB
SHA256 c6ab4c8307ae05a14a97881c96b919dcfda41c622c68bb22b54df3fc1b92aadd
MD5 fced9a25545878010615019154c86e8f
SHA1 3adb1aefd26481f42fc9451852dd8d344890a462
SHA512 43785ffe39554f705233e3b669bb212f3c8f9d7df0656a7290a8b1596f92361278a299f15f1d61c8f616aed44ff4898ac87ebaadfd3eb5cc63ef81e96af97b65
SSDEEP 768:5udApTNctooWUS7C+mo2qt5HO9YjoHPICYzjbKgX3iPTSJShBJRXrHNBDZ0x:5udApTNmU2Z6kgCY3bdXSPGJ65Dd0x
TLSH
T1AA230A0037E8822BF2BE5F78A9F26145867AF2633603D5891CC451D75723FC6CA426EE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4036-0-0x0000000000F10000-0x0000000000F22000-memory.dmp

Download

memory/4036-1-0x0000000005980000-0x0000000005990000-memory.dmp

Download

memory/4036-2-0x00000000058C0000-0x000000000595C000-memory.dmp

Download

memory/4296-10-0x0000000005560000-0x0000000005570000-memory.dmp

Download

memory/4296-13-0x0000000005560000-0x0000000005570000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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