asyncrat | cbf37235e35f3823287ffa5adead151873944b9d540ad4c953d29c4f8711d1fd

General

Target

msedge.exe
Size

145KB
MD5

6a4ecf73deebde28f382fcfb5bec6217
SHA1

dd0e386f238500e74d131bda5c206509d5d07687
SHA256

cbf37235e35f3823287ffa5adead151873944b9d540ad4c953d29c4f8711d1fd
SHA512

859e185da74e2f300cc3d7e215c2cc8e3ed56db39a0de28f9589e8743fa8730377ed06d239ea18c10345f7d243b34c5f0f0a468692b2b3f9691a092aa6d38834
SSDEEP

3072:+UOcxHCoeGPMVhYSnu1bhnQIe5BV0WUniyimyJLY:+EeGPMVKiwb9re5v0WURyt

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

147.185.221.20:49485

Mutex

geuttmzzyleqrt

Attributes

delay
3
install
true
install_file
msedge.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 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x00070000000186f3-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2820	msedge.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
2688	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
2332	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2108	msedge.exe
2108	msedge.exe
2108	msedge.exe
2820	msedge.exe
2820	msedge.exe
2820	msedge.exe
2820	msedge.exe
2820	msedge.exe
2820	msedge.exe
2820	msedge.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2108	msedge.exe
Token: SeDebugPrivilege	2820	msedge.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2820	msedge.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2108 wrote to memory of 2392	2108	msedge.exe	30
PID 2108 wrote to memory of 2392	2108	msedge.exe	30
PID 2108 wrote to memory of 2392	2108	msedge.exe	30
PID 2108 wrote to memory of 2336	2108	msedge.exe	31
PID 2108 wrote to memory of 2336	2108	msedge.exe	31
PID 2108 wrote to memory of 2336	2108	msedge.exe	31
PID 2392 wrote to memory of 2332	2392	cmd.exe	34
PID 2392 wrote to memory of 2332	2392	cmd.exe	34
PID 2392 wrote to memory of 2332	2392	cmd.exe	34
PID 2336 wrote to memory of 2688	2336	cmd.exe	35
PID 2336 wrote to memory of 2688	2336	cmd.exe	35
PID 2336 wrote to memory of 2688	2336	cmd.exe	35
PID 2336 wrote to memory of 2820	2336	cmd.exe	36
PID 2336 wrote to memory of 2820	2336	cmd.exe	36
PID 2336 wrote to memory of 2820	2336	cmd.exe	36

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\msedge.exe
"C:\Users\Admin\AppData\Local\Temp\msedge.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2108
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "msedge" /tr '"C:\Users\Admin\AppData\Roaming\msedge.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2392
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "msedge" /tr '"C:\Users\Admin\AppData\Roaming\msedge.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2332
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC64B.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2336
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2688
- - C:\Users\Admin\AppData\Roaming\msedge.exe
    "C:\Users\Admin\AppData\Roaming\msedge.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2820

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\tmpC64B.tmp.bat

Filesize
150B

MD5
ef66e7b949f3eace91c29890958dbb07

SHA1
fe87573d98174cc761e28f332d3abcbe36673fa8

SHA256
6f28efdf77dc75dd6ba2433177f02bdcc2acff365e20cb196c28877249cea409

SHA512
1a22ffa0e4ae748e4d8dfa7c1b2bbd15582a35a7eb6272e0e7a3a0c8c36327ba8125261ffe39eae482acfd7d769a96c5f6068fceb05dbaef6ee72a4d90423cfc

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\msedge.exe

Filesize
145KB

MD5
6a4ecf73deebde28f382fcfb5bec6217

SHA1
dd0e386f238500e74d131bda5c206509d5d07687

SHA256
cbf37235e35f3823287ffa5adead151873944b9d540ad4c953d29c4f8711d1fd

SHA512
859e185da74e2f300cc3d7e215c2cc8e3ed56db39a0de28f9589e8743fa8730377ed06d239ea18c10345f7d243b34c5f0f0a468692b2b3f9691a092aa6d38834

Download Submit
memory/2108-0-0x000007FEF5413000-0x000007FEF5414000-memory.dmp

Filesize
4KB

Download
memory/2108-1-0x00000000008F0000-0x000000000091A000-memory.dmp

Filesize
168KB

Download
memory/2108-3-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

Filesize
9.9MB

Download
memory/2108-11-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

Filesize
9.9MB

Download
memory/2108-14-0x000007FEF5410000-0x000007FEF5DFC000-memory.dmp

Filesize
9.9MB

Download
memory/2820-18-0x0000000000110000-0x000000000013A000-memory.dmp

Filesize
168KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads