asyncrat | 8a6f75426c02db73affeb070b56bebcbfb8769387dfc15f94018ffc1f63d3938

General

Target

runtime.exe
Size

73KB
MD5

4fa7b1eec1fc84eb3a13c29e5a37aae7
SHA1

dfff9fceeb4d74d7e82f9f0a65d1889fa0f9e326
SHA256

5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311
SHA512

5e36a5589499a3db56d78de1b66a9ee57a2972bc57bf4b915df9118fd2a584c74ba00c61531d922431b72e87f9c53585c4c1a78a2aba122a22ea5e3603aa06ba
SSDEEP

1536:KIUme0cxdlOH4PAI7Bn3h36rAi8EjZUPMwC/eqmmRhdWVH1bfbfPmjmwzUYbVclN:KIUm3cxdlOH4YI7Bn3h36rAi8EVUPMwv

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.2

Botnet

Default

C2

72.5.43.15:4449

Mutex

yezcydjwbxouz

Attributes

delay
1
install
true
install_file
win.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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\win.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

win.exe

pid process

2860 win.exe
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

2700 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

Processes:

schtasks.exe

pid process

2704 schtasks.exe

pid	process
2860	win.exe

pid	process
2700	timeout.exe

pid	process
2704	schtasks.exe

Suspicious behavior: EnumeratesProcesses 36 IoCs

Processes:

runtime.exewin.exe

pid	process
2356	runtime.exe
2356	runtime.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe
2860	win.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

runtime.exewin.exe

description pid process

Token: SeDebugPrivilege 2356 runtime.exe
Token: SeDebugPrivilege 2860 win.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

win.exe

pid process

2860 win.exe

description	pid	process
Token: SeDebugPrivilege	2356	runtime.exe
Token: SeDebugPrivilege	2860	win.exe

pid	process
2860	win.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

runtime.execmd.execmd.exe

description	pid	process	target process
PID 2356 wrote to memory of 2172	2356	runtime.exe	cmd.exe
PID 2356 wrote to memory of 2172	2356	runtime.exe	cmd.exe
PID 2356 wrote to memory of 2172	2356	runtime.exe	cmd.exe
PID 2356 wrote to memory of 2996	2356	runtime.exe	cmd.exe
PID 2356 wrote to memory of 2996	2356	runtime.exe	cmd.exe
PID 2356 wrote to memory of 2996	2356	runtime.exe	cmd.exe
PID 2996 wrote to memory of 2700	2996	cmd.exe	timeout.exe
PID 2996 wrote to memory of 2700	2996	cmd.exe	timeout.exe
PID 2996 wrote to memory of 2700	2996	cmd.exe	timeout.exe
PID 2172 wrote to memory of 2704	2172	cmd.exe	schtasks.exe
PID 2172 wrote to memory of 2704	2172	cmd.exe	schtasks.exe
PID 2172 wrote to memory of 2704	2172	cmd.exe	schtasks.exe
PID 2996 wrote to memory of 2860	2996	cmd.exe	win.exe
PID 2996 wrote to memory of 2860	2996	cmd.exe	win.exe
PID 2996 wrote to memory of 2860	2996	cmd.exe	win.exe

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\runtime.exe
"C:\Users\Admin\AppData\Local\Temp\runtime.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2356

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:2172

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "win" /tr '"C:\Users\Admin\AppData\Roaming\win.exe"'
3⤵
- Scheduled Task/Job: Scheduled Task
PID:2704

C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1719.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:2996

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:2700

C:\Users\Admin\AppData\Roaming\win.exe
"C:\Users\Admin\AppData\Roaming\win.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2860

Network

MITRE ATT&CK Matrix ATT&CK v13

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

2

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar3C4C.tmp
Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1719.tmp.bat
Filesize
147B

MD5
1e2271d38277e5a2df86d753a83a1b8e

SHA1
afa35b4909e3f40ac53a27314e8d6790488e8d73

SHA256
8fc4460873e08b0031f0cc838ca15316847c3e4fbd0435bd3c665ec0fac45f7a

SHA512
9e60fa1549ac9e8973ae097572a622e8c044e1c54a68755975bc5e442b2de650672e910eb95599fed0364ee102c6e9d72267049bfa10932392bfc1626f3b453d

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\win.exe
Filesize
73KB

MD5
4fa7b1eec1fc84eb3a13c29e5a37aae7

SHA1
dfff9fceeb4d74d7e82f9f0a65d1889fa0f9e326

SHA256
5f5aa560b9b2d9f7ea3b9a4e05b9b9b35107dc78bd763000fe05f6b3f998f311

SHA512
5e36a5589499a3db56d78de1b66a9ee57a2972bc57bf4b915df9118fd2a584c74ba00c61531d922431b72e87f9c53585c4c1a78a2aba122a22ea5e3603aa06ba

Download Submit
memory/2356-0-0x000007FEF5BD3000-0x000007FEF5BD4000-memory.dmp

Filesize
4KB

Download
memory/2356-1-0x00000000011B0000-0x00000000011C8000-memory.dmp

Filesize
96KB

Download
memory/2356-3-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2356-11-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2356-14-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp

Filesize
9.9MB

Download
memory/2860-18-0x0000000000A70000-0x0000000000A88000-memory.dmp

Filesize
96KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

Loading Replay Monitor...

Downloads