asyncrat | 62633f30dcde970ba66ae44c9175ece9953c8f39fcbb54ef2fcd54d473cba808

General

Target

KKKApi.exe
Size

45KB
MD5

2c147ac800cab2d7899c22768c586f3d
SHA1

e9774daaffc7b312fc8162cf8d4a6dbf28d47361
SHA256

62633f30dcde970ba66ae44c9175ece9953c8f39fcbb54ef2fcd54d473cba808
SHA512

d67272bafabf95a1c1d818d8d5a67aa4052e646e8c9394d7d37995d39f47d814c08d8c539927747437ddd4ec73c4e1a14149aa06fe9b11e452b659ef6423918a
SSDEEP

768:muokxmFTkUE1YAgWUOl1nyamo2qR6ITnyfaaPIVzjbMgX3iPogj5CWQcttzUBDZw:muokxmFTkUMYi1t2lEhV3bDXSPnj5lvF

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

193.23.160.13:7707

Mutex

GAD1XUdwNDb7

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/0x0007000000012119-13.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2744	Server-Host.exe

Loads dropped DLL 1 IoCs

pid	Process
2792	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	KKKApi.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
2752	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
2748	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2028	KKKApi.exe
2028	KKKApi.exe
2028	KKKApi.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2028	KKKApi.exe
Token: SeDebugPrivilege	2744	Server-Host.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2028 wrote to memory of 2340	2028	KKKApi.exe	30
PID 2028 wrote to memory of 2340	2028	KKKApi.exe	30
PID 2028 wrote to memory of 2340	2028	KKKApi.exe	30
PID 2028 wrote to memory of 2340	2028	KKKApi.exe	30
PID 2028 wrote to memory of 2792	2028	KKKApi.exe	32
PID 2028 wrote to memory of 2792	2028	KKKApi.exe	32
PID 2028 wrote to memory of 2792	2028	KKKApi.exe	32
PID 2028 wrote to memory of 2792	2028	KKKApi.exe	32
PID 2340 wrote to memory of 2748	2340	cmd.exe	34
PID 2340 wrote to memory of 2748	2340	cmd.exe	34
PID 2340 wrote to memory of 2748	2340	cmd.exe	34
PID 2340 wrote to memory of 2748	2340	cmd.exe	34
PID 2792 wrote to memory of 2752	2792	cmd.exe	35
PID 2792 wrote to memory of 2752	2792	cmd.exe	35
PID 2792 wrote to memory of 2752	2792	cmd.exe	35
PID 2792 wrote to memory of 2752	2792	cmd.exe	35
PID 2792 wrote to memory of 2744	2792	cmd.exe	36
PID 2792 wrote to memory of 2744	2792	cmd.exe	36
PID 2792 wrote to memory of 2744	2792	cmd.exe	36
PID 2792 wrote to memory of 2744	2792	cmd.exe	36

C:\Users\Admin\AppData\Local\Temp\KKKApi.exe
"C:\Users\Admin\AppData\Local\Temp\KKKApi.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2028
- 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:2340
- - 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:2748
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpAB3D.tmp.bat""
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2792
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2752
- - 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:2744

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\CabC5E0.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar712F.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpAB3D.tmp.bat

Filesize
155B

MD5
695d5c2ed683aa45cca7d816eb93495b

SHA1
90109b5f5020c3785c394272b62397ee4d4e87c1

SHA256
bdb900fca80b70dc37602b999939b45929b8a5dcc61fad75e48cac89e11eebb9

SHA512
c4cadeb265dd77330fe35696523e978a53de7b9ecb6bbd55b622cb295fb6c86b887607bb3c2a26d7f4adc0f47badca35e2fcd541b0c156f47d7c2e74b9d39b8a

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

Filesize
45KB

MD5
2c147ac800cab2d7899c22768c586f3d

SHA1
e9774daaffc7b312fc8162cf8d4a6dbf28d47361

SHA256
62633f30dcde970ba66ae44c9175ece9953c8f39fcbb54ef2fcd54d473cba808

SHA512
d67272bafabf95a1c1d818d8d5a67aa4052e646e8c9394d7d37995d39f47d814c08d8c539927747437ddd4ec73c4e1a14149aa06fe9b11e452b659ef6423918a

Download Submit
memory/2028-0-0x0000000073ECE000-0x0000000073ECF000-memory.dmp

Filesize
4KB

Download
memory/2028-1-0x0000000000F50000-0x0000000000F62000-memory.dmp

Filesize
72KB

Download
memory/2028-2-0x0000000073EC0000-0x00000000745AE000-memory.dmp

Filesize
6.9MB

Download
memory/2028-12-0x0000000073EC0000-0x00000000745AE000-memory.dmp

Filesize
6.9MB

Download
memory/2744-16-0x00000000009C0000-0x00000000009D2000-memory.dmp

Filesize
72KB

Download
memory/2744-33-0x0000000005190000-0x00000000051F8000-memory.dmp

Filesize
416KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads