asyncrat | 59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e

General

Target
59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
Size 45KB
Sample260905-pfcd6adf99
SHA256 59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e
MD5 a8ebe3f39ec000f65ff427c86a8a478d
SHA1 875419c445cb7543d15079c2ce39a777f9bbbfd4
SHA512 8752a82117092bd2445a23456df99c1b2bd45aee9d2955b6ee27c82f54208769f7a19a5bdced850e3894106a19a3bb01f9553dac45c4e94a793c8f0136dacf21
SSDEEP 768:5uSy6pTpwrSWWUE3/WImo2qNaSi0ynzuOPIbzjb1gXQi55LGU5hfZBDZ0x:5uSy6pTpoo2nSVh3b3bSXt55LGAh/d0x
TLSH
T134233A0037E9822BF2BE5F74ADF22145467EB2633603D54A2CC452DB5713FC68A526EE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

tvsexmi.click:80
tvsexmi.click:22
tvsexmi.click:8080
tvsexmi.click:8880
tvsexmi.click:2052
tvsexmi.click:2082
tvsexmi.click:2086
tvsexmi.click:2095
tvsexmi.click:443
tvsexmi.click:2053
tvsexmi.click:2083
tvsexmi.click:2087
tvsexmi.click:2096
tvsexmi.click:8443
www.tvsexmi.click:80
www.tvsexmi.click:22
www.tvsexmi.click:8080
www.tvsexmi.click:8880
www.tvsexmi.click:2052
www.tvsexmi.click:2082
www.tvsexmi.click:2086
www.tvsexmi.click:2095
www.tvsexmi.click:443
www.tvsexmi.click:2053
www.tvsexmi.click:2083
www.tvsexmi.click:2087
www.tvsexmi.click:2096
www.tvsexmi.click:8443
malware.tvsexmi.click:80
malware.tvsexmi.click:22
malware.tvsexmi.click:8080
malware.tvsexmi.click:8880
malware.tvsexmi.click:2052
malware.tvsexmi.click:2082
malware.tvsexmi.click:2086
malware.tvsexmi.click:2095
malware.tvsexmi.click:443
malware.tvsexmi.click:2053
malware.tvsexmi.click:2083
malware.tvsexmi.click:2087
malware.tvsexmi.click:2096
malware.tvsexmi.click:8443
zeus.tvsexmi.click:80
zeus.tvsexmi.click:22
zeus.tvsexmi.click:8080
zeus.tvsexmi.click:8880
zeus.tvsexmi.click:2052
zeus.tvsexmi.click:2082
zeus.tvsexmi.click:2086
zeus.tvsexmi.click:2095
zeus.tvsexmi.click:443
zeus.tvsexmi.click:2053
zeus.tvsexmi.click:2083
zeus.tvsexmi.click:2087
zeus.tvsexmi.click:2096
zeus.tvsexmi.click:8443

Mutex

JNHe6YJSo0xS

Attributes

delay
0
install
true
install_file
x7t6mwn.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/0x000d0000000242c7-8.dat	family_asyncrat
behavioral1/memory/4392-10-0x00000000054F0000-0x0000000005500000-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	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe

Executes dropped EXE 2 IoCs

pid	Process
4392	x7t6mwn.exe
3088	x7t6mwn.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
676	cmd.exe
860	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	x7t6mwn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	x7t6mwn.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.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
5072	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
3408	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
Token: SeDebugPrivilege	4392	x7t6mwn.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 860	2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe	85
PID 2544 wrote to memory of 676	2544	59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe	87
PID 676 wrote to memory of 5072	676	cmd.exe	89
PID 860 wrote to memory of 3408	860	cmd.exe	90
PID 676 wrote to memory of 3088	676	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe
"C:\Users\Admin\AppData\Local\Temp\59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "x7t6mwn" /tr '"C:\Users\Admin\AppData\Roaming\x7t6mwn.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:860
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "x7t6mwn" /tr '"C:\Users\Admin\AppData\Roaming\x7t6mwn.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3408
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1C1E.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:676
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5072
- - C:\Users\Admin\AppData\Roaming\x7t6mwn.exe
    "C:\Users\Admin\AppData\Roaming\x7t6mwn.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3088

C:\Users\Admin\AppData\Roaming\x7t6mwn.exe
"C:\Users\Admin\AppData\Roaming\x7t6mwn.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4392

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp1C1E.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1C1E.tmp.bat
Size 151B
SHA256 6204a8dd19750acf777fe88b0a2ec3be0302df943a52c81d2f768d34aca09dd0
MD5 8a0d726998fe0260fa218012e2be4b08
SHA1 a06c9b39858c86191602e22dff69ff42e375d840
SHA512 f91697b38f00c370692845dbe16a00a5f84ab63e5f3f4164ede1191f33f54554a775197948d5d0d5b2937e375ea7e34d5c7ee46f30874fc1ff97ae23b1b9bd88
TLSH
T10BC02B9259CAFE4FA90A141302FBD89CA1B26CA93F80BB00C304445D12C0C58F4D9381
MD5 SHA1 SHA512 TLSH

Submit Download

x7t6mwn.exe

Path C:\Users\Admin\AppData\Roaming\x7t6mwn.exe
Size 45KB
SHA256 59e48a904bfc9dcd8e22f4c6cd437fb5fd65b5c4c0ab6000f8090edb746ba96e
MD5 a8ebe3f39ec000f65ff427c86a8a478d
SHA1 875419c445cb7543d15079c2ce39a777f9bbbfd4
SHA512 8752a82117092bd2445a23456df99c1b2bd45aee9d2955b6ee27c82f54208769f7a19a5bdced850e3894106a19a3bb01f9553dac45c4e94a793c8f0136dacf21
SSDEEP 768:5uSy6pTpwrSWWUE3/WImo2qNaSi0ynzuOPIbzjb1gXQi55LGU5hfZBDZ0x:5uSy6pTpoo2nSVh3b3bSXt55LGAh/d0x
TLSH
T134233A0037E9822BF2BE5F74ADF22145467EB2633603D54A2CC452DB5713FC68A526EE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2544-0-0x0000000000E80000-0x0000000000E92000-memory.dmp

Download

memory/2544-1-0x0000000005880000-0x0000000005890000-memory.dmp

Download

memory/2544-2-0x0000000005780000-0x000000000581C000-memory.dmp

Download

memory/4392-10-0x00000000054F0000-0x0000000005500000-memory.dmp

Download

memory/4392-13-0x00000000054F0000-0x0000000005500000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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