asyncrat | fec63e2ee9e830df5298bd72464fe6753a60a5ef14bd3023e9ab99260878b3df

General

Target

MicroStrap.exe
Size

74KB
MD5

9785b81af0d8b024dadd31659a3a2d24
SHA1

14f4539dc755b69ad28f9c1953aeec3620669588
SHA256

fec63e2ee9e830df5298bd72464fe6753a60a5ef14bd3023e9ab99260878b3df
SHA512

002df3d93cde212d4a9678f167201599d5e874defe15f2e46494d72f442692bf62a8fcfa226963f0575335f0b1062a61508ca143b95614eef4a6d7cd563c5120
SSDEEP

1536:OUKkcx9pXCTyPMVEZ8kyIgH1bO/zeoBDQzcOLVclN:OUDcx958yPMVEZ81H1bOLRDQHBY

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

195.88.218.126:2404

Mutex

rnxgsvfqmra

Attributes

delay
1
install
true
install_file
svchost.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
behavioral1/files/0x0007000000016cab-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2744	svchost.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2768	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
2888	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
804	MicroStrap.exe
804	MicroStrap.exe
804	MicroStrap.exe
2744	svchost.exe
2744	svchost.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	804	MicroStrap.exe
Token: SeDebugPrivilege	2744	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2744	svchost.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 804 wrote to memory of 1700	804	MicroStrap.exe	31
PID 804 wrote to memory of 1700	804	MicroStrap.exe	31
PID 804 wrote to memory of 1700	804	MicroStrap.exe	31
PID 804 wrote to memory of 2200	804	MicroStrap.exe	33
PID 804 wrote to memory of 2200	804	MicroStrap.exe	33
PID 804 wrote to memory of 2200	804	MicroStrap.exe	33
PID 2200 wrote to memory of 2768	2200	cmd.exe	35
PID 2200 wrote to memory of 2768	2200	cmd.exe	35
PID 2200 wrote to memory of 2768	2200	cmd.exe	35
PID 1700 wrote to memory of 2888	1700	cmd.exe	36
PID 1700 wrote to memory of 2888	1700	cmd.exe	36
PID 1700 wrote to memory of 2888	1700	cmd.exe	36
PID 2200 wrote to memory of 2744	2200	cmd.exe	37
PID 2200 wrote to memory of 2744	2200	cmd.exe	37
PID 2200 wrote to memory of 2744	2200	cmd.exe	37

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\MicroStrap.exe
"C:\Users\Admin\AppData\Local\Temp\MicroStrap.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:804
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1700
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2888
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpF19F.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2768
- - C:\Users\Admin\AppData\Roaming\svchost.exe
    "C:\Users\Admin\AppData\Roaming\svchost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2744

Network

MITRE ATT&CK Enterprise v15

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

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpF19F.tmp.bat

Filesize
151B

MD5
ff4c8a952fd78498f9b66db76b6b889a

SHA1
90468732f1cdec385adba4c6f96d5c468888334b

SHA256
be7635b694f23191752480671cdb881a2bedc81604a1a995ff1a2c2f4331cef8

SHA512
726fce21cd99693ecc716e1d963a7d352a8990aa29823ea3b4e624b666889df55c5ecaf7b37c9b387371f0ff4bbb8c124717a7434c210b1ff9e3897dae895cca

Download Submit
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

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

Filesize
74KB

MD5
9785b81af0d8b024dadd31659a3a2d24

SHA1
14f4539dc755b69ad28f9c1953aeec3620669588

SHA256
fec63e2ee9e830df5298bd72464fe6753a60a5ef14bd3023e9ab99260878b3df

SHA512
002df3d93cde212d4a9678f167201599d5e874defe15f2e46494d72f442692bf62a8fcfa226963f0575335f0b1062a61508ca143b95614eef4a6d7cd563c5120

Download Submit
memory/804-0-0x000007FEF58E3000-0x000007FEF58E4000-memory.dmp

Filesize
4KB

Download
memory/804-1-0x0000000000E90000-0x0000000000EA8000-memory.dmp

Filesize
96KB

Download
memory/804-3-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/804-13-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/804-14-0x000007FEF58E0000-0x000007FEF62CC000-memory.dmp

Filesize
9.9MB

Download
memory/2744-18-0x0000000000C90000-0x0000000000CA8000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads