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/0x0009000000015cd6-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2768	Server-Host.exe

Loads dropped DLL 1 IoCs

pid	Process
2180	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server-Host.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2828	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
2136	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2416	4439ef5204e48d27ce6a05e726744a91.exe
2416	4439ef5204e48d27ce6a05e726744a91.exe
2416	4439ef5204e48d27ce6a05e726744a91.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2416	4439ef5204e48d27ce6a05e726744a91.exe
Token: SeDebugPrivilege	2768	Server-Host.exe
Token: SeDebugPrivilege	2768	Server-Host.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 2392	2416	4439ef5204e48d27ce6a05e726744a91.exe	32
PID 2416 wrote to memory of 2392	2416	4439ef5204e48d27ce6a05e726744a91.exe	32
PID 2416 wrote to memory of 2392	2416	4439ef5204e48d27ce6a05e726744a91.exe	32
PID 2416 wrote to memory of 2392	2416	4439ef5204e48d27ce6a05e726744a91.exe	32
PID 2416 wrote to memory of 2180	2416	4439ef5204e48d27ce6a05e726744a91.exe	34
PID 2416 wrote to memory of 2180	2416	4439ef5204e48d27ce6a05e726744a91.exe	34
PID 2416 wrote to memory of 2180	2416	4439ef5204e48d27ce6a05e726744a91.exe	34
PID 2416 wrote to memory of 2180	2416	4439ef5204e48d27ce6a05e726744a91.exe	34
PID 2392 wrote to memory of 2136	2392	cmd.exe	35
PID 2392 wrote to memory of 2136	2392	cmd.exe	35
PID 2392 wrote to memory of 2136	2392	cmd.exe	35
PID 2392 wrote to memory of 2136	2392	cmd.exe	35
PID 2180 wrote to memory of 2828	2180	cmd.exe	37
PID 2180 wrote to memory of 2828	2180	cmd.exe	37
PID 2180 wrote to memory of 2828	2180	cmd.exe	37
PID 2180 wrote to memory of 2828	2180	cmd.exe	37
PID 2180 wrote to memory of 2768	2180	cmd.exe	38
PID 2180 wrote to memory of 2768	2180	cmd.exe	38
PID 2180 wrote to memory of 2768	2180	cmd.exe	38
PID 2180 wrote to memory of 2768	2180	cmd.exe	38

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:2416
- 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:2392
- - 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:2136
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpE5AE.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2180
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2828
- - 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:2768

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\Cab254.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar178B.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE5AE.tmp.bat

Filesize
155B

MD5
389e67c621b9340340a6745880dda024

SHA1
3e1c45d904b235bfe3e009f0dbba1b4cd040d3ac

SHA256
c0016ae01a80e0720d3cb789621c2235cd7b27b063f55c274762152daf8dd70d

SHA512
c4bbc746dd1ebed8066998fca7da85cd8a7ed95c7a7da94bbeb1b36615fe38d274043913a4c3526337c554e32f78f87129d9185c2877de7098f55ecb859f0c5e

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

Filesize
47KB

MD5
4439ef5204e48d27ce6a05e726744a91

SHA1
c423d37e120c92c8dcbfb44ee2b8db2572034dc6

SHA256
0680d99cd3e9932de4429d04bbbf6032e8b670700d70d758d9377e899552fc9a

SHA512
e4eaf577f22f84f2842b156c9a278372916267afe40d9f720095ef44c47616812fb787067dc1c4f1751100994c40f3c0a0a38aff539407401a42d03acf1ec0ad

Download Submit
memory/2416-0-0x000000007425E000-0x000000007425F000-memory.dmp

Filesize
4KB

Download
memory/2416-1-0x0000000001020000-0x0000000001032000-memory.dmp

Filesize
72KB

Download
memory/2416-2-0x0000000074250000-0x000000007493E000-memory.dmp

Filesize
6.9MB

Download
memory/2416-11-0x0000000074250000-0x000000007493E000-memory.dmp

Filesize
6.9MB

Download
memory/2768-16-0x00000000011A0000-0x00000000011B2000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads