asyncrat | 2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce

General

Target
2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
Size 45KB
Sample260601-vgetkacv8j
SHA256 2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce
MD5 833e94d695d689356fba1f9ac1f4c454
SHA1 2f5e007f47e4972e99bcfc3e92d6484ea8896cfb
SHA512 0a18d513e906fbfe783a104649d6ad5b3c459d1b966e9b395e5e937114a367a7df35fcd73883f0eb9c9bed28a2401a2f30ab6b1494a388bc12e351ed2405fd51
SSDEEP 768:puTO9TgQsFcZWURDOjmo2qwi9YSkqXzNOPISzjbJgu3iSslczpiuN6mulAqtBDZ1:puTO9TgQCv2yaVq3S3bGuSdAulAad7x
TLSH
T140231A003BE9C12BF2BF4F7859F26105867AF2672603D64A1CC452D75723BC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

sexviet88s.blog:443
sexviet88s.blog:80
sexviet88s.blog:7797
sexviet88s.blog:8707
sexviet88s.blog:6620
www.sexviet88s.blog:443
www.sexviet88s.blog:80
www.sexviet88s.blog:7797
www.sexviet88s.blog:8707
www.sexviet88s.blog:6620
cl0p.sexviet88s.blog:443
cl0p.sexviet88s.blog:80
cl0p.sexviet88s.blog:7797
cl0p.sexviet88s.blog:8707
cl0p.sexviet88s.blog:6620
mydoom.sexviet88s.blog:443
mydoom.sexviet88s.blog:80
mydoom.sexviet88s.blog:7797
mydoom.sexviet88s.blog:8707
mydoom.sexviet88s.blog:6620

Mutex

Gbi7ask156L9

Attributes

delay
0
install
true
install_file
ygcn56k.exe
install_folder
%AppData%

aes.plain

Signatures

Family: 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
behavioral2/files/0x001a00000002b68d-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1488	ygcn56k.exe
4128	ygcn56k.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ygcn56k.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ygcn56k.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5072	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
1624	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
Token: SeDebugPrivilege	1488	ygcn56k.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 2376	2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe	79
PID 2360 wrote to memory of 3508	2360	2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe	81
PID 2376 wrote to memory of 1624	2376	cmd.exe	83
PID 3508 wrote to memory of 5072	3508	cmd.exe	84
PID 3508 wrote to memory of 4128	3508	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe
"C:\Users\Admin\AppData\Local\Temp\2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2360
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ygcn56k" /tr '"C:\Users\Admin\AppData\Roaming\ygcn56k.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2376
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ygcn56k" /tr '"C:\Users\Admin\AppData\Roaming\ygcn56k.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1624
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp179A.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3508
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5072
- - C:\Users\Admin\AppData\Roaming\ygcn56k.exe
    "C:\Users\Admin\AppData\Roaming\ygcn56k.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4128

C:\Users\Admin\AppData\Roaming\ygcn56k.exe
"C:\Users\Admin\AppData\Roaming\ygcn56k.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1488

Network

MITRE ATT&CK Enterprise v16

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp179A.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp179A.tmp.bat
Size 151B
SHA256 d4181e3d20a7c16f349190cbd64b97bb1c40ef53c5e007d22d72c474045d46c6
MD5 981fbc290561002a83a08067f8787f75
SHA1 66e7d06c574042e2fbb2947748fac9313239c738
SHA512 3c99a96e65abfc1a900591d835e09537333833a5399aee26c54ebf12ffb76abc702468bcc92d5b983c075602b29f393f24f827bf27c19dc0ec39402e164a64da
TLSH
T1E9C02B4251CDEA4F3809141312FAE59C92766C5E3F88BB00C304854E3280448F0D9385
MD5 SHA1 SHA512 TLSH

Submit Download

ygcn56k.exe

Path C:\Users\Admin\AppData\Roaming\ygcn56k.exe
Size 45KB
SHA256 2b444d0da6e36ddc35fc14ad9f3efd51a46dafb8a9d128dba75426d18a7b39ce
MD5 833e94d695d689356fba1f9ac1f4c454
SHA1 2f5e007f47e4972e99bcfc3e92d6484ea8896cfb
SHA512 0a18d513e906fbfe783a104649d6ad5b3c459d1b966e9b395e5e937114a367a7df35fcd73883f0eb9c9bed28a2401a2f30ab6b1494a388bc12e351ed2405fd51
SSDEEP 768:puTO9TgQsFcZWURDOjmo2qwi9YSkqXzNOPISzjbJgu3iSslczpiuN6mulAqtBDZ1:puTO9TgQCv2yaVq3S3bGuSdAulAad7x
TLSH
T140231A003BE9C12BF2BF4F7859F26105867AF2672603D64A1CC452D75723BC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2360-0-0x0000000000D50000-0x0000000000D62000-memory.dmp

Download

memory/2360-1-0x0000000005860000-0x0000000005870000-memory.dmp

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memory/2360-2-0x0000000005870000-0x000000000590C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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