asyncrat | fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e

General

Target

fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
Size

47KB
MD5

8a157f3fc0ea3d6b8644b918b610947e
SHA1

095c33d5b86fd75d76619cffd6259badb5d1b03e
SHA256

fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e
SHA512

f2584732363237d6e409c6f0c0c7f038c67df2ae31df92bbed3431afa60495955b896d8a5bf7a913c876e5c7446b9fedab70d040832b82b32dbc5d43c461fc38
SSDEEP

768:6uW81Towx/9WU9Vt+Xmo2qzgTRVTzuuSPIG5RorYKN8n5b0bK78dpNXbpl3rePD+:6uW81Toq7C2fFz97kRaYKN3bK4dfXaF8

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

5.tcp.eu.ngrok.io:15310

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
Valorantbuild.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x001a00000002b0ca-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
4668	Valorantbuild.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs

Web Service

T1102

flow	ioc
1	5.tcp.eu.ngrok.io

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 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	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Valorantbuild.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2512	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
3588	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
Token: SeDebugPrivilege	4668	Valorantbuild.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5884 wrote to memory of 1508	5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe	78
PID 5884 wrote to memory of 1508	5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe	78
PID 5884 wrote to memory of 1508	5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe	78
PID 5884 wrote to memory of 1696	5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe	80
PID 5884 wrote to memory of 1696	5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe	80
PID 5884 wrote to memory of 1696	5884	fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe	80
PID 1508 wrote to memory of 3588	1508	cmd.exe	82
PID 1508 wrote to memory of 3588	1508	cmd.exe	82
PID 1508 wrote to memory of 3588	1508	cmd.exe	82
PID 1696 wrote to memory of 2512	1696	cmd.exe	83
PID 1696 wrote to memory of 2512	1696	cmd.exe	83
PID 1696 wrote to memory of 2512	1696	cmd.exe	83
PID 1696 wrote to memory of 4668	1696	cmd.exe	84
PID 1696 wrote to memory of 4668	1696	cmd.exe	84
PID 1696 wrote to memory of 4668	1696	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe
"C:\Users\Admin\AppData\Local\Temp\fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5884
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Valorantbuild" /tr '"C:\Users\Admin\AppData\Roaming\Valorantbuild.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1508
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Valorantbuild" /tr '"C:\Users\Admin\AppData\Roaming\Valorantbuild.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3588
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp77DF.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1696
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2512
- - C:\Users\Admin\AppData\Roaming\Valorantbuild.exe
    "C:\Users\Admin\AppData\Roaming\Valorantbuild.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:4668

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp77DF.tmp.bat

Filesize
157B

MD5
2e8e80c9bad767bf979d5bc9c60a313f

SHA1
48c0c6e627d3ccb9b9d0bdb1c47a91a2d57c00ce

SHA256
090a8276367c1920006ac0575f1d8459fd494d803353bcc9de127c78866e5d96

SHA512
9ef0471786e946afd2f654e9168a55d028e3936ba40b8b13064a740b69ae76961eabb1ac9ceb53bc8a12f29e459e7ca1e680ae1ee62206548b10b5627ad76b17

Download Submit
C:\Users\Admin\AppData\Roaming\Valorantbuild.exe

Filesize
47KB

MD5
8a157f3fc0ea3d6b8644b918b610947e

SHA1
095c33d5b86fd75d76619cffd6259badb5d1b03e

SHA256
fba348d623f8cd0af63315a97ff67a51e0af864fb07c02824cbd83dafb173f8e

SHA512
f2584732363237d6e409c6f0c0c7f038c67df2ae31df92bbed3431afa60495955b896d8a5bf7a913c876e5c7446b9fedab70d040832b82b32dbc5d43c461fc38

Download Submit
memory/4668-13-0x0000000074B50000-0x0000000075301000-memory.dmp

Filesize
7.7MB

Download
memory/4668-14-0x0000000074B50000-0x0000000075301000-memory.dmp

Filesize
7.7MB

Download
memory/5884-0-0x0000000074B5E000-0x0000000074B5F000-memory.dmp

Filesize
4KB

Download
memory/5884-1-0x0000000000B10000-0x0000000000B22000-memory.dmp

Filesize
72KB

Download
memory/5884-2-0x0000000074B50000-0x0000000075301000-memory.dmp

Filesize
7.7MB

Download
memory/5884-3-0x0000000005660000-0x00000000056FC000-memory.dmp

Filesize
624KB

Download
memory/5884-8-0x0000000074B50000-0x0000000075301000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads