asyncrat | 15e54d280f43e3244152602d4959597c80f84b2b247b1ce82f35b32d9d302ede

General

Target
AsyncRAT.exe
Size 56KB
Sample260910-g68w2sstez
SHA256 15e54d280f43e3244152602d4959597c80f84b2b247b1ce82f35b32d9d302ede
MD5 d3792e19e00f8adcfecad566b2906ab0
SHA1 6a1e30c5242d1f61a05cdd3ca09385fcf2aad8c9
SHA512 4b5ce31e980d8c91fe22a435c3f2617bac04b3237eee5167d542cf41b3206e4e47c224657f81eac3dabf4777db02e6c5423342befccce0a5e23351405cb7eb80
SSDEEP 1536:2uf09TH2w240YikbeXSCDpudNkejNUHLTq:2ufoTH2w2pYikbeDpuDkINmq
TLSH
T13F435C0037E9812BF2BE5FB8ACF21144867AF2676603D65D2CC451DB5713BC6DA026FA
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

jbo.com.vc:443
jbo.com.vc:8848
jbo.com.vc:8080

Mutex

kBVPjakHQ19X

Attributes

delay
3
install
true
install_file
AsyncRat.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/0x00080000000242c6-9.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	AsyncRAT.exe

Executes dropped EXE 2 IoCs

pid	Process
3468	AsyncRat.exe
1388	AsyncRat.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
4688	cmd.exe
1224	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRAT.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
4512	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
3088	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe
2596	AsyncRAT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2596	AsyncRAT.exe
Token: SeDebugPrivilege	3468	AsyncRat.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2596 wrote to memory of 4688	2596	AsyncRAT.exe	85
PID 2596 wrote to memory of 1224	2596	AsyncRAT.exe	87
PID 1224 wrote to memory of 4512	1224	cmd.exe	90
PID 4688 wrote to memory of 3088	4688	cmd.exe	91
PID 1224 wrote to memory of 1388	1224	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\AsyncRAT.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncRAT.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2596
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4688
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "AsyncRat" /tr '"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3088
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp69C1.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1224
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4512
- - C:\Users\Admin\AppData\Roaming\AsyncRat.exe
    "C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1388

C:\Users\Admin\AppData\Roaming\AsyncRat.exe
"C:\Users\Admin\AppData\Roaming\AsyncRat.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3468

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

AsyncRat.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\AsyncRat.exe.log
Size 522B
SHA256 2412679218bb0a7d05ceee32869bbb223619bde9966c4c460a68304a3367724b
MD5 acc9090417037dfa2a55b46ed86e32b8
SHA1 53fa6fb25fb3e88c24d2027aca6ae492b2800a4d
SHA512 d51f7085ec147c708f446b9fb6923cd2fb64596d354ed929e125b30ace57c8cb3217589447a36960e5d3aea87a4e48aaa82c7509eced6d6c2cecd71fcfe3697b
TLSH
T11EF097303722E1E489423F521C1C3A9943EF079AA360EE2C3958036ED825227AB212E3
MD5 SHA1 SHA512 TLSH

Submit Download

tmp69C1.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp69C1.tmp.bat
Size 152B
SHA256 98fc782600f1ea223805d213ab1eb195a189fc9b8b0cfaf9ac3c132bdbd5a00c
MD5 6db926826634d3ba0d712cfc3cbe25d6
SHA1 c405821330e828b79d2b93281a5314b98fb02086
SHA512 e4c89aba5949159aef1964a7597ac9e68d1ac657494c464c50e6e315de28a9b3b2a4b32f4a45638578e419449e6624767ef773906b8c55a8578e145b33cc91bd
TLSH
T113C02B4292C5EB3F2C06345313FBDD8C91B66C593F80BB40C70844AD528098CF0E9346
MD5 SHA1 SHA512 TLSH

Submit Download

AsyncRat.exe

Path C:\Users\Admin\AppData\Roaming\AsyncRat.exe
Size 56KB
SHA256 15e54d280f43e3244152602d4959597c80f84b2b247b1ce82f35b32d9d302ede
MD5 d3792e19e00f8adcfecad566b2906ab0
SHA1 6a1e30c5242d1f61a05cdd3ca09385fcf2aad8c9
SHA512 4b5ce31e980d8c91fe22a435c3f2617bac04b3237eee5167d542cf41b3206e4e47c224657f81eac3dabf4777db02e6c5423342befccce0a5e23351405cb7eb80
SSDEEP 1536:2uf09TH2w240YikbeXSCDpudNkejNUHLTq:2ufoTH2w2pYikbeDpuDkINmq
TLSH
T13F435C0037E9812BF2BE5FB8ACF21144867AF2676603D65D2CC451DB5713BC6DA026FA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2596-0-0x0000000000B90000-0x0000000000BA4000-memory.dmp

Download

memory/2596-1-0x0000000005630000-0x0000000005640000-memory.dmp

Download

memory/2596-2-0x0000000005550000-0x00000000055EC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads