asyncrat | 0680d99cd3e9932de4429d04bbbf6032e8b670700d70d758d9377e899552fc9a

General

Target

4439ef5204e48d27ce6a05e726744a91.exe
Size

47KB
MD5

4439ef5204e48d27ce6a05e726744a91
SHA1

c423d37e120c92c8dcbfb44ee2b8db2572034dc6
SHA256

0680d99cd3e9932de4429d04bbbf6032e8b670700d70d758d9377e899552fc9a
SHA512

e4eaf577f22f84f2842b156c9a278372916267afe40d9f720095ef44c47616812fb787067dc1c4f1751100994c40f3c0a0a38aff539407401a42d03acf1ec0ad
SSDEEP

768:RuokxmFTkUE1YAgWUOl1nyamo2qRA7uBCwnUnHSLyhPImmL0bX0MN379sqJA16lN:RuokxmFTkUMYi1t29PwnS+mmAbX0UL9H

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

45.90.13.137:7707

Mutex

ZD8FXEva3syi

Attributes

delay
3
install
true
install_file
Server-Host.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/0x000700000001211b-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2844	Server-Host.exe

Loads dropped DLL 1 IoCs

pid	Process
2788	cmd.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 6 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	4439ef5204e48d27ce6a05e726744a91.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server-Host.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2824	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
2976	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1720	4439ef5204e48d27ce6a05e726744a91.exe
1720	4439ef5204e48d27ce6a05e726744a91.exe
1720	4439ef5204e48d27ce6a05e726744a91.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1720	4439ef5204e48d27ce6a05e726744a91.exe
Token: SeDebugPrivilege	2844	Server-Host.exe
Token: SeDebugPrivilege	2844	Server-Host.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1720 wrote to memory of 2896	1720	4439ef5204e48d27ce6a05e726744a91.exe	31
PID 1720 wrote to memory of 2896	1720	4439ef5204e48d27ce6a05e726744a91.exe	31
PID 1720 wrote to memory of 2896	1720	4439ef5204e48d27ce6a05e726744a91.exe	31
PID 1720 wrote to memory of 2896	1720	4439ef5204e48d27ce6a05e726744a91.exe	31
PID 1720 wrote to memory of 2788	1720	4439ef5204e48d27ce6a05e726744a91.exe	33
PID 1720 wrote to memory of 2788	1720	4439ef5204e48d27ce6a05e726744a91.exe	33
PID 1720 wrote to memory of 2788	1720	4439ef5204e48d27ce6a05e726744a91.exe	33
PID 1720 wrote to memory of 2788	1720	4439ef5204e48d27ce6a05e726744a91.exe	33
PID 2896 wrote to memory of 2976	2896	cmd.exe	35
PID 2896 wrote to memory of 2976	2896	cmd.exe	35
PID 2896 wrote to memory of 2976	2896	cmd.exe	35
PID 2896 wrote to memory of 2976	2896	cmd.exe	35
PID 2788 wrote to memory of 2824	2788	cmd.exe	36
PID 2788 wrote to memory of 2824	2788	cmd.exe	36
PID 2788 wrote to memory of 2824	2788	cmd.exe	36
PID 2788 wrote to memory of 2824	2788	cmd.exe	36
PID 2788 wrote to memory of 2844	2788	cmd.exe	37
PID 2788 wrote to memory of 2844	2788	cmd.exe	37
PID 2788 wrote to memory of 2844	2788	cmd.exe	37
PID 2788 wrote to memory of 2844	2788	cmd.exe	37

C:\Users\Admin\AppData\Local\Temp\4439ef5204e48d27ce6a05e726744a91.exe
"C:\Users\Admin\AppData\Local\Temp\4439ef5204e48d27ce6a05e726744a91.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1720
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2896
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "Server-Host" /tr '"C:\Users\Admin\AppData\Roaming\Server-Host.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2976
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpDD26.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2824
- - C:\Users\Admin\AppData\Roaming\Server-Host.exe
    "C:\Users\Admin\AppData\Roaming\Server-Host.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2844

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

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

C:\Users\Admin\AppData\Local\Temp\CabF8C2.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpDD26.tmp.bat

Filesize
155B

MD5
a2638e1993dc4fe55bdfd2797d36c979

SHA1
49051d273ef6b22c37f73f31a2f87ecffdbda92b

SHA256
f55ee1a3db06c7362ccfe671e7ff4b8e125aa73ec6efaee521ee2f0e4a6903da

SHA512
c697a5d8a758e66ad20e4ec76fcea901c64ed2c33073869a157f4f55474348fec37a02bc3152e2275975dae0a57b7c12963ab77f1634a7fdf690cec0937bb6ca

Download Submit
\Users\Admin\AppData\Roaming\Server-Host.exe

Filesize
47KB

MD5
4439ef5204e48d27ce6a05e726744a91

SHA1
c423d37e120c92c8dcbfb44ee2b8db2572034dc6

SHA256
0680d99cd3e9932de4429d04bbbf6032e8b670700d70d758d9377e899552fc9a

SHA512
e4eaf577f22f84f2842b156c9a278372916267afe40d9f720095ef44c47616812fb787067dc1c4f1751100994c40f3c0a0a38aff539407401a42d03acf1ec0ad

Download Submit
memory/1720-0-0x000000007473E000-0x000000007473F000-memory.dmp

Filesize
4KB

Download
memory/1720-1-0x0000000000900000-0x0000000000912000-memory.dmp

Filesize
72KB

Download
memory/1720-2-0x0000000074730000-0x0000000074E1E000-memory.dmp

Filesize
6.9MB

Download
memory/1720-12-0x0000000074730000-0x0000000074E1E000-memory.dmp

Filesize
6.9MB

Download
memory/2844-16-0x0000000000050000-0x0000000000062000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads