asyncrat | a39234abb087b986209b4ed86dbecafb50347409f37f6d20f2ca82230c356f79

General

Target

Shellbag analyzer.exe
Size

247KB
MD5

d3b88d7974e5ef23ed78f97d18fd0f8a
SHA1

cba12e2cfc60e994fbb7e99317c3130af9a532ea
SHA256

a39234abb087b986209b4ed86dbecafb50347409f37f6d20f2ca82230c356f79
SHA512

6e295e1f17e65d7685542304c8846ba076e4a52985a8cdc342cfa2969453050f6b7e98dbfe4f41247fe5dcce1f191daad42556913e04be0cc5a66c83909ab2b9
SSDEEP

6144:/bwmPMVWrVb3rBPwF9kfK8rpClz0KBb6o589GHWHWujiSPbp:/bw8ZrB5gBuj/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

sdhjriajyp

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

resource	yara_rule
behavioral1/files/0x0009000000018bb8-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2704	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
33	4.tcp.eu.ngrok.io
4	pastebin.com
5	pastebin.com
6	4.tcp.eu.ngrok.io
23	4.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

pid	Process
2656	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
2740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 31 IoCs

pid	Process
2632	Shellbag analyzer.exe
2632	Shellbag analyzer.exe
2632	Shellbag analyzer.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe
2704	update.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2632	Shellbag analyzer.exe
Token: SeDebugPrivilege	2632	Shellbag analyzer.exe
Token: SeDebugPrivilege	2704	update.exe
Token: SeDebugPrivilege	2704	update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2704	update.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2632 wrote to memory of 2296	2632	Shellbag analyzer.exe	31
PID 2632 wrote to memory of 2296	2632	Shellbag analyzer.exe	31
PID 2632 wrote to memory of 2296	2632	Shellbag analyzer.exe	31
PID 2632 wrote to memory of 2464	2632	Shellbag analyzer.exe	32
PID 2632 wrote to memory of 2464	2632	Shellbag analyzer.exe	32
PID 2632 wrote to memory of 2464	2632	Shellbag analyzer.exe	32
PID 2464 wrote to memory of 2656	2464	cmd.exe	35
PID 2464 wrote to memory of 2656	2464	cmd.exe	35
PID 2464 wrote to memory of 2656	2464	cmd.exe	35
PID 2296 wrote to memory of 2740	2296	cmd.exe	36
PID 2296 wrote to memory of 2740	2296	cmd.exe	36
PID 2296 wrote to memory of 2740	2296	cmd.exe	36
PID 2464 wrote to memory of 2704	2464	cmd.exe	37
PID 2464 wrote to memory of 2704	2464	cmd.exe	37
PID 2464 wrote to memory of 2704	2464	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\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:2632
- 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:2296
- - 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:2740
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpE225.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2464
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2656
- - 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:2704

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\Cab14A.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar1376.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE225.tmp.bat

Filesize
150B

MD5
041435ff1e86f0fe066e2fbb716114d9

SHA1
ae4dd6e962aa5815b9d47fcd494b8ec816cf7219

SHA256
33a3bae9eab9792790f29b1ef5a0aabac1cb4b1587b4bfca0a42679f34aabeab

SHA512
298d7662f6e9826fcf7168a02ce0b734e3b669dba29e4743472236465661a6dd1b8562d563e7794e9c6a35f2087540681a652deb3cedf7b3de6523466a47c038

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
d3b88d7974e5ef23ed78f97d18fd0f8a

SHA1
cba12e2cfc60e994fbb7e99317c3130af9a532ea

SHA256
a39234abb087b986209b4ed86dbecafb50347409f37f6d20f2ca82230c356f79

SHA512
6e295e1f17e65d7685542304c8846ba076e4a52985a8cdc342cfa2969453050f6b7e98dbfe4f41247fe5dcce1f191daad42556913e04be0cc5a66c83909ab2b9

Download Submit
memory/2632-0-0x000007FEF5EE3000-0x000007FEF5EE4000-memory.dmp

Filesize
4KB

Download
memory/2632-1-0x00000000003B0000-0x00000000003F4000-memory.dmp

Filesize
272KB

Download
memory/2632-3-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2632-11-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2632-14-0x000007FEF5EE0000-0x000007FEF68CC000-memory.dmp

Filesize
9.9MB

Download
memory/2704-18-0x0000000000A00000-0x0000000000A44000-memory.dmp

Filesize
272KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads