asyncrat | 9a53898c19872bb21ba431b3601e7b1899e23769fb476d81cf8d839dd33f738c

General

Target
RAT.exe
Size 56KB
Sample260804-sp4fsatbmb
SHA256 9a53898c19872bb21ba431b3601e7b1899e23769fb476d81cf8d839dd33f738c
MD5 03f2be3af45930d9fd459047e2f43819
SHA1 757d76b53f2a877ae482d7f5db183e199487d847
SHA512 df9ff49155dbb83c8ced6e261294279121ef5c102827fc1fcb080d19114009a363824afa304a581b6991a7ce7c38417784520f32ea998626f9448c0628ba35f6
SSDEEP 1536:auskdTsnb2SlVJj+bSXSG4mLf/NN3amsdJkejNUHLTq:ausITsnb2eTj+bSGi/3aZXkINmq
TLSH
T1DE436C0037E9812AF1BE4F78ADF2214586BAE2677603D54D2CC851CB5613FC6DA426FE
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

pitstopmanagement.com:443
pitstopmanagement.com:8848
pitstopmanagement.com: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/0x000300000001e697-8.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-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	RAT.exe

Executes dropped EXE 2 IoCs

pid	Process
1612	AsyncRat.exe
2616	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
2088	cmd.exe
4592	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	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncRat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RAT.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
4028	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
5108	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe
1944	RAT.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1944	RAT.exe
Token: SeDebugPrivilege	1612	AsyncRat.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1944 wrote to memory of 2088	1944	RAT.exe	88
PID 1944 wrote to memory of 4592	1944	RAT.exe	90
PID 4592 wrote to memory of 4028	4592	cmd.exe	92
PID 2088 wrote to memory of 5108	2088	cmd.exe	93
PID 4592 wrote to memory of 2616	4592	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\RAT.exe
"C:\Users\Admin\AppData\Local\Temp\RAT.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944
- 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:2088
- - 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:5108
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp52DE.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4592
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4028
- - 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:2616

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:1612

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

tmp52DE.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp52DE.tmp.bat
Size 152B
SHA256 82d48e2d3187e34aece6c2af6dd5d5beeac1325432220d53f072a15d782a76a1
MD5 e0e952ad8d0e5d77c462bfee96ffa062
SHA1 c601eb3230fe1f1b2ca57ef37b725e379d0e243a
SHA512 aaf785d025164c6478b0f6c2ef088b525fad030d9123afd70139332811a93b7bce7bfb36e5627f98482f166ddcefb708b13673e657e23966f21a89972d555fc4
TLSH
T172C02B4292C5EB1F2C07341317FADD8D9176AC5A3F40BB40C30844AF128054EF4E9341
MD5 SHA1 SHA512 TLSH

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AsyncRat.exe

Path C:\Users\Admin\AppData\Roaming\AsyncRat.exe
Size 56KB
SHA256 9a53898c19872bb21ba431b3601e7b1899e23769fb476d81cf8d839dd33f738c
MD5 03f2be3af45930d9fd459047e2f43819
SHA1 757d76b53f2a877ae482d7f5db183e199487d847
SHA512 df9ff49155dbb83c8ced6e261294279121ef5c102827fc1fcb080d19114009a363824afa304a581b6991a7ce7c38417784520f32ea998626f9448c0628ba35f6
SSDEEP 1536:auskdTsnb2SlVJj+bSXSG4mLf/NN3amsdJkejNUHLTq:ausITsnb2eTj+bSGi/3aZXkINmq
TLSH
T1DE436C0037E9812AF1BE4F78ADF2214586BAE2677603D54D2CC851CB5613FC6DA426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1944-0-0x0000000000890000-0x00000000008A4000-memory.dmp

Download

memory/1944-1-0x0000000005300000-0x0000000005310000-memory.dmp

Download

memory/1944-2-0x0000000005310000-0x00000000053AC000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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