asyncrat | 515e5105f1bda9207f1342220ecaddc6dc04b8aa54149e7cc7ccb38225845d03

General

Target

251523fa1b013d8ca82ab08f177d3ab2.exe
Size

49KB
MD5

251523fa1b013d8ca82ab08f177d3ab2
SHA1

ff641e25cb287db90de6f59786a9a940aa2c5bee
SHA256

515e5105f1bda9207f1342220ecaddc6dc04b8aa54149e7cc7ccb38225845d03
SHA512

63316282cb55b46fbf5b4c95f4ec39cb59fd7b775c4c1dec4db502b8957ff41c31de3b7b7526c8bfe9c79d68070c433d78ce9d51848d51e9e57a3b3639367ef5
SSDEEP

1536:luqY9T9xy2eD3bmXSTLNI98P0wx8vV9XdD4C:luqUT9xy2eD3bmsxI9S8vVhR4C

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

nasihej725.hopto.org:6606

Mutex

Microsoft_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Windows Session Control.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Async RAT payload 3 IoCs

rat

resource	yara_rule
behavioral2/memory/1520-133-0x0000000000960000-0x0000000000972000-memory.dmp	asyncrat
behavioral2/files/0x000200000001e417-143.dat	asyncrat
behavioral2/files/0x000200000001e417-144.dat	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-1-5-21-1013461898-3711306144-4198452673-1000\Control Panel\International\Geo\Nation	251523fa1b013d8ca82ab08f177d3ab2.exe

Executes dropped EXE 1 IoCs

pid	Process
4008	Windows Session Control.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
2404	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2064	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe
1520	251523fa1b013d8ca82ab08f177d3ab2.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1520	251523fa1b013d8ca82ab08f177d3ab2.exe
Token: SeDebugPrivilege	4008	Windows Session Control.exe
Token: SeDebugPrivilege	4008	Windows Session Control.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1520 wrote to memory of 804	1520	251523fa1b013d8ca82ab08f177d3ab2.exe	82
PID 1520 wrote to memory of 804	1520	251523fa1b013d8ca82ab08f177d3ab2.exe	82
PID 1520 wrote to memory of 804	1520	251523fa1b013d8ca82ab08f177d3ab2.exe	82
PID 1520 wrote to memory of 2128	1520	251523fa1b013d8ca82ab08f177d3ab2.exe	84
PID 1520 wrote to memory of 2128	1520	251523fa1b013d8ca82ab08f177d3ab2.exe	84
PID 1520 wrote to memory of 2128	1520	251523fa1b013d8ca82ab08f177d3ab2.exe	84
PID 804 wrote to memory of 2404	804	cmd.exe	86
PID 804 wrote to memory of 2404	804	cmd.exe	86
PID 804 wrote to memory of 2404	804	cmd.exe	86
PID 2128 wrote to memory of 2064	2128	cmd.exe	87
PID 2128 wrote to memory of 2064	2128	cmd.exe	87
PID 2128 wrote to memory of 2064	2128	cmd.exe	87
PID 2128 wrote to memory of 4008	2128	cmd.exe	91
PID 2128 wrote to memory of 4008	2128	cmd.exe	91
PID 2128 wrote to memory of 4008	2128	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\251523fa1b013d8ca82ab08f177d3ab2.exe
"C:\Users\Admin\AppData\Local\Temp\251523fa1b013d8ca82ab08f177d3ab2.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1520
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Session Control" /tr '"C:\Users\Admin\AppData\Roaming\Windows Session Control.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:804
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Windows Session Control" /tr '"C:\Users\Admin\AppData\Roaming\Windows Session Control.exe"'
    3⤵
    - Creates scheduled task(s)
    PID:2404
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8988.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2128
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2064
- - C:\Users\Admin\AppData\Roaming\Windows Session Control.exe
    "C:\Users\Admin\AppData\Roaming\Windows Session Control.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:4008

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp8988.tmp.bat

Filesize
167B

MD5
a95b18578d58859082fb9a6479bc8ac8

SHA1
88f104d619857fcaa6b231f375681a574747384e

SHA256
13cf07f15aed8dd720df774d38cdd0a682d43c0bf0444423fe13cf7a9580fdc5

SHA512
c8cf8601f4d1de398331b57b8188ee6f0a1249ef7e65b5eb1e97029fa154e01775fde887be9c2d4dcf317bf5d4d67f7b526933413d908d26b416864c00fe366e

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Session Control.exe

Filesize
49KB

MD5
251523fa1b013d8ca82ab08f177d3ab2

SHA1
ff641e25cb287db90de6f59786a9a940aa2c5bee

SHA256
515e5105f1bda9207f1342220ecaddc6dc04b8aa54149e7cc7ccb38225845d03

SHA512
63316282cb55b46fbf5b4c95f4ec39cb59fd7b775c4c1dec4db502b8957ff41c31de3b7b7526c8bfe9c79d68070c433d78ce9d51848d51e9e57a3b3639367ef5

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Session Control.exe

Filesize
49KB

MD5
251523fa1b013d8ca82ab08f177d3ab2

SHA1
ff641e25cb287db90de6f59786a9a940aa2c5bee

SHA256
515e5105f1bda9207f1342220ecaddc6dc04b8aa54149e7cc7ccb38225845d03

SHA512
63316282cb55b46fbf5b4c95f4ec39cb59fd7b775c4c1dec4db502b8957ff41c31de3b7b7526c8bfe9c79d68070c433d78ce9d51848d51e9e57a3b3639367ef5

Download Submit
memory/1520-133-0x0000000000960000-0x0000000000972000-memory.dmp

Filesize
72KB

Download
memory/1520-134-0x0000000005420000-0x0000000005430000-memory.dmp

Filesize
64KB

Download
memory/1520-135-0x0000000005430000-0x0000000005496000-memory.dmp

Filesize
408KB

Download
memory/1520-136-0x0000000005860000-0x00000000058FC000-memory.dmp

Filesize
624KB

Download
memory/4008-145-0x0000000005620000-0x0000000005630000-memory.dmp

Filesize
64KB

Download
memory/4008-146-0x00000000063D0000-0x0000000006974000-memory.dmp

Filesize
5.6MB

Download
memory/4008-147-0x0000000005620000-0x0000000005630000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads