asyncrat | 24e23f8bcdde00e6158591a10b0e195d525315fd4cabc0de541ac27f9c17f8bc

General

Target

Shellbag analyzer.exe
Size

247KB
MD5

e5dc76743d789ff02bc6f747804fd327
SHA1

b96c2778e123656266782da48f8b9a84918c8fc2
SHA256

24e23f8bcdde00e6158591a10b0e195d525315fd4cabc0de541ac27f9c17f8bc
SHA512

dc6fa31d3b12bf2786b76bbf74c7d2ef13e5f2a0b09082e693b004fad2efa67eef90cac7586ec43c64705dedcb57cebfd11c865b16706aac2452318842db700d
SSDEEP

6144:iPEGPMVOrVbjlnwF9kfK8rpClz0KBb6o589GHWHWujiSPbp:iPEU9lhgBuj/PV

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

Attributes

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

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/0x001b00000001565c-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2820	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 5 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com
6	6.tcp.eu.ngrok.io
22	6.tcp.eu.ngrok.io
28	6.tcp.eu.ngrok.io

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2336	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
2468	schtasks.exe

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
3008	Shellbag analyzer.exe
3008	Shellbag analyzer.exe
3008	Shellbag analyzer.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe
2820	update.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3008	Shellbag analyzer.exe
Token: SeDebugPrivilege	3008	Shellbag analyzer.exe
Token: SeDebugPrivilege	2820	update.exe
Token: SeDebugPrivilege	2820	update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2820	update.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3008 wrote to memory of 2368	3008	Shellbag analyzer.exe	30
PID 3008 wrote to memory of 2368	3008	Shellbag analyzer.exe	30
PID 3008 wrote to memory of 2368	3008	Shellbag analyzer.exe	30
PID 3008 wrote to memory of 2672	3008	Shellbag analyzer.exe	31
PID 3008 wrote to memory of 2672	3008	Shellbag analyzer.exe	31
PID 3008 wrote to memory of 2672	3008	Shellbag analyzer.exe	31
PID 2368 wrote to memory of 2468	2368	cmd.exe	34
PID 2368 wrote to memory of 2468	2368	cmd.exe	34
PID 2368 wrote to memory of 2468	2368	cmd.exe	34
PID 2672 wrote to memory of 2336	2672	cmd.exe	35
PID 2672 wrote to memory of 2336	2672	cmd.exe	35
PID 2672 wrote to memory of 2336	2672	cmd.exe	35
PID 2672 wrote to memory of 2820	2672	cmd.exe	36
PID 2672 wrote to memory of 2820	2672	cmd.exe	36
PID 2672 wrote to memory of 2820	2672	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\Shellbag analyzer.exe
"C:\Users\Admin\AppData\Local\Temp\Shellbag analyzer.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3008
- 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:2368
- - 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:2468
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp2617.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2672
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2336
- - 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: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

2

T1012

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab49EE.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5CC5.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2617.tmp.bat

Filesize
150B

MD5
6509da90a33edcce461ce8ca71b3b9ae

SHA1
97a9552db2bdeae029a2ff3428f41a27d3b92c59

SHA256
d6e12caf6deb44bb0f5fad15c50e461c4b7ea2077d92c5e3c260360bc30597ec

SHA512
f62dc528d17a79a5e58055bb3b6dc404ac1243c74213cae3c04488db4ff698821e95b6bc59f61e7f1d9779435463ef7f59c9d744cec2c870aa78252499730054

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
e5dc76743d789ff02bc6f747804fd327

SHA1
b96c2778e123656266782da48f8b9a84918c8fc2

SHA256
24e23f8bcdde00e6158591a10b0e195d525315fd4cabc0de541ac27f9c17f8bc

SHA512
dc6fa31d3b12bf2786b76bbf74c7d2ef13e5f2a0b09082e693b004fad2efa67eef90cac7586ec43c64705dedcb57cebfd11c865b16706aac2452318842db700d

Download Submit
memory/2820-18-0x0000000001130000-0x0000000001174000-memory.dmp

Filesize
272KB

Download
memory/3008-0-0x000007FEF61A3000-0x000007FEF61A4000-memory.dmp

Filesize
4KB

Download
memory/3008-1-0x0000000000170000-0x00000000001B4000-memory.dmp

Filesize
272KB

Download
memory/3008-3-0x000007FEF61A0000-0x000007FEF6B8C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-12-0x000007FEF61A0000-0x000007FEF6B8C000-memory.dmp

Filesize
9.9MB

Download
memory/3008-13-0x000007FEF61A0000-0x000007FEF6B8C000-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