asyncrat | 3537198ebe7eb84bea0eaf47c3955d02b7d6b0d94cef1415d25c1558191a19bd

General

Target

creative sound blaster.exe
Size

272KB
MD5

ec3968fd0cf6b025017dbb83249de6f2
SHA1

e1805d0f7984f46819320f2121fc67948c0cdfa5
SHA256

3537198ebe7eb84bea0eaf47c3955d02b7d6b0d94cef1415d25c1558191a19bd
SHA512

f73da223c70fe28f0f0515d17c56e3c8f2ced64894489749a9ad02822995e72429b6ab50963d84676a3de1f76d48bc5952cbb98f044376929332964fb228c509
SSDEEP

3072:pUTcxgTEiPMVTb3SH1bnrgYQgy9ckYMmlB/v6A80XH3e55EVu9cBY:pCEiPMVTbiVb0YS5YM6VyA80XHbUe

Score

10^/10

asyncrat dllhost.dat discovery rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

dllhost.dat

C2

147.185.221.21:5552

147.185.221.21:6643

Mutex

evyjfpsdxkkqc

Attributes

delay
1
install
true
install_file
dllhost.dat.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/0x005100000000f5ab-16.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2888	dllhost.dat.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
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
2664	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
2904	schtasks.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
2284	creative sound blaster.exe
2284	creative sound blaster.exe
2284	creative sound blaster.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe
2888	dllhost.dat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	creative sound blaster.exe
Token: SeDebugPrivilege	2888	dllhost.dat.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2888	dllhost.dat.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2704	2284	creative sound blaster.exe	31
PID 2284 wrote to memory of 2704	2284	creative sound blaster.exe	31
PID 2284 wrote to memory of 2704	2284	creative sound blaster.exe	31
PID 2284 wrote to memory of 2660	2284	creative sound blaster.exe	33
PID 2284 wrote to memory of 2660	2284	creative sound blaster.exe	33
PID 2284 wrote to memory of 2660	2284	creative sound blaster.exe	33
PID 2704 wrote to memory of 2904	2704	cmd.exe	35
PID 2704 wrote to memory of 2904	2704	cmd.exe	35
PID 2704 wrote to memory of 2904	2704	cmd.exe	35
PID 2660 wrote to memory of 2664	2660	cmd.exe	36
PID 2660 wrote to memory of 2664	2660	cmd.exe	36
PID 2660 wrote to memory of 2664	2660	cmd.exe	36
PID 2660 wrote to memory of 2888	2660	cmd.exe	37
PID 2660 wrote to memory of 2888	2660	cmd.exe	37
PID 2660 wrote to memory of 2888	2660	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\creative sound blaster.exe
"C:\Users\Admin\AppData\Local\Temp\creative sound blaster.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2284
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dllhost.dat" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2704
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "dllhost.dat" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2904
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpC60.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2660
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2664
- - C:\Users\Admin\AppData\Roaming\dllhost.dat.exe
    "C:\Users\Admin\AppData\Roaming\dllhost.dat.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:2888

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab2696.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar5A46.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpC60.tmp.bat

Filesize
154B

MD5
974a563b7b6431065f579ee0563426c0

SHA1
b9f0bed5a06ca819604fce3ae0ba6f78c6166f87

SHA256
9d6bfa460c0b7108d3b9393dc6dfdf4beb24505ef6bd2f4d006717ae3ac6a83c

SHA512
e2485eb21f8623bcc0ed9dfdbd0f62bc6744af53423ef44c7a442f219e86dcaccf6610d9eaf47bfa0bff751c9f3295bb9066dcd892b71487b6696e09495375bb

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\dllhost.dat.exe

Filesize
272KB

MD5
ec3968fd0cf6b025017dbb83249de6f2

SHA1
e1805d0f7984f46819320f2121fc67948c0cdfa5

SHA256
3537198ebe7eb84bea0eaf47c3955d02b7d6b0d94cef1415d25c1558191a19bd

SHA512
f73da223c70fe28f0f0515d17c56e3c8f2ced64894489749a9ad02822995e72429b6ab50963d84676a3de1f76d48bc5952cbb98f044376929332964fb228c509

Download Submit
memory/2284-0-0x000007FEF6063000-0x000007FEF6064000-memory.dmp

Filesize
4KB

Download
memory/2284-1-0x00000000002F0000-0x000000000033A000-memory.dmp

Filesize
296KB

Download
memory/2284-3-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

Filesize
9.9MB

Download
memory/2284-12-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

Filesize
9.9MB

Download
memory/2284-14-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

Filesize
9.9MB

Download
memory/2888-18-0x0000000000BD0000-0x0000000000C1A000-memory.dmp

Filesize
296KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads