asyncrat | 0b7987bd9f7cbee60c4c809f22ecda6f314a0366f0704ed474626ac5f7af3521

General

Target

Shellbag anylizer.exe
Size

247KB
MD5

851269fc86de5d91e5f2db1b2b34cb6e
SHA1

6103dab45c98bddef65b6eed235a60159d458526
SHA256

0b7987bd9f7cbee60c4c809f22ecda6f314a0366f0704ed474626ac5f7af3521
SHA512

c01c7d2ec52d55ece6f88eeb9c5ecf260ef9b59fd3f08ad42e4ed582b24bd482fcfd334375177b032564f567af6d195f7627249abe1e428f52f6c2806783acfc
SSDEEP

6144:/bwmPMVWrVbVPwF9kfK8rpClz0KBb6o589GHWHWujiSPbp:/bw8n5gBuj/PV

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Mutex

zedtklncvg

Attributes

delay
1
install
true
install_file
update.exe
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/f2T8NYnM

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\update.exe	family_asyncrat

Executes dropped EXE 1 IoCs

Processes:

update.exe

pid process

2728 update.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
Legitimate hosting services abused for malware hosting/C2 1 TTPs 6 IoCs

Web Service
T1102

Processes:

flow ioc

4 pastebin.com
5 pastebin.com
6 0.tcp.eu.ngrok.io
14 0.tcp.eu.ngrok.io
22 0.tcp.eu.ngrok.io
34 0.tcp.eu.ngrok.io
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

Processes:

timeout.exe

pid process

2604 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

2720 schtasks.exe

pid	process
2728	update.exe

flow	ioc
4	pastebin.com
5	pastebin.com
6	0.tcp.eu.ngrok.io
14	0.tcp.eu.ngrok.io
22	0.tcp.eu.ngrok.io
34	0.tcp.eu.ngrok.io

pid	process
2604	timeout.exe

pid	process
2720	schtasks.exe

Suspicious behavior: EnumeratesProcesses 30 IoCs

Processes:

Shellbag anylizer.exeupdate.exe

pid	process
2932	Shellbag anylizer.exe
2932	Shellbag anylizer.exe
2932	Shellbag anylizer.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe
2728	update.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Shellbag anylizer.exeupdate.exe

description	pid	process
Token: SeDebugPrivilege	2932	Shellbag anylizer.exe
Token: SeDebugPrivilege	2932	Shellbag anylizer.exe
Token: SeDebugPrivilege	2728	update.exe
Token: SeDebugPrivilege	2728	update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

update.exe

pid process

2728 update.exe

pid	process
2728	update.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

Shellbag anylizer.execmd.execmd.exe

description	pid	process	target process
PID 2932 wrote to memory of 2836	2932	Shellbag anylizer.exe	cmd.exe
PID 2932 wrote to memory of 2836	2932	Shellbag anylizer.exe	cmd.exe
PID 2932 wrote to memory of 2836	2932	Shellbag anylizer.exe	cmd.exe
PID 2932 wrote to memory of 2184	2932	Shellbag anylizer.exe	cmd.exe
PID 2932 wrote to memory of 2184	2932	Shellbag anylizer.exe	cmd.exe
PID 2932 wrote to memory of 2184	2932	Shellbag anylizer.exe	cmd.exe
PID 2836 wrote to memory of 2720	2836	cmd.exe	schtasks.exe
PID 2836 wrote to memory of 2720	2836	cmd.exe	schtasks.exe
PID 2836 wrote to memory of 2720	2836	cmd.exe	schtasks.exe
PID 2184 wrote to memory of 2604	2184	cmd.exe	timeout.exe
PID 2184 wrote to memory of 2604	2184	cmd.exe	timeout.exe
PID 2184 wrote to memory of 2604	2184	cmd.exe	timeout.exe
PID 2184 wrote to memory of 2728	2184	cmd.exe	update.exe
PID 2184 wrote to memory of 2728	2184	cmd.exe	update.exe
PID 2184 wrote to memory of 2728	2184	cmd.exe	update.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\Shellbag anylizer.exe
"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2932
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2836
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "update" /tr '"C:\Users\Admin\AppData\Roaming\update.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2720
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp7475.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2184
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2604
- - C:\Users\Admin\AppData\Roaming\update.exe
    "C:\Users\Admin\AppData\Roaming\update.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2728

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

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab9417.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarA643.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp7475.tmp.bat

Filesize
150B

MD5
c7ca5db12283642e83e34b798d29e45e

SHA1
829f2229aaa6507a5d22ee371c5e4d87f68ca33e

SHA256
8a94e08e1a32d4dff6bbc5c2b799143a76e1fdbbce23e7f20408fa137554c6ee

SHA512
50d40401bcc476c94d5990635965234974410ccb3e05f46b4860e06f9f3ac8742f049bef9e10336e43ece856a1d88181679beee5e00bf3ce1309c4db0989db49

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\update.exe

Filesize
247KB

MD5
851269fc86de5d91e5f2db1b2b34cb6e

SHA1
6103dab45c98bddef65b6eed235a60159d458526

SHA256
0b7987bd9f7cbee60c4c809f22ecda6f314a0366f0704ed474626ac5f7af3521

SHA512
c01c7d2ec52d55ece6f88eeb9c5ecf260ef9b59fd3f08ad42e4ed582b24bd482fcfd334375177b032564f567af6d195f7627249abe1e428f52f6c2806783acfc

Download Submit
memory/2728-18-0x0000000000070000-0x00000000000B4000-memory.dmp

Filesize
272KB

Download
memory/2932-0-0x000007FEF5B93000-0x000007FEF5B94000-memory.dmp

Filesize
4KB

Download
memory/2932-1-0x0000000000280000-0x00000000002C4000-memory.dmp

Filesize
272KB

Download
memory/2932-3-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download
memory/2932-11-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download
memory/2932-14-0x000007FEF5B90000-0x000007FEF657C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads