asyncrat | 99d8ecf3d2a1a59544148a8b2650e0fe4f4c76df2974d5d7df78de3f823c668b

General

Target

Drawing&spec.scr
Size

941KB
MD5

3a43f4d6c1ce25bc8efe548fa2b16bc7
SHA1

e0b8080d2c241ee9c8d7d31adb6ecc0fc43d0a0e
SHA256

4b5cc1e99d28651fbb693422c5d392c5d47dfa61c8ec4995197706de5cb3442a
SHA512

3613b2af89545273fb21c09889e02e477d86ac2e3f313fec2a28fb68c9e94b39b3160b26d7637dce1e5053808ffe14cb0aad9dd0c404bbd6d4c8d7ea897e8072
SSDEEP

24576:uu6J33O0c+JY5UZ+XC0kGso6FauSnJzxWY:gu0c++OCvkGs9FauSaY

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

69.174.100.131:6606

Mutex

abkZfsCYRZhk

Attributes

delay
10
install
false
install_file
order.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\unfatigued.vbs	unfatigued.exe

Executes dropped EXE 1 IoCs

pid	Process
2988	unfatigued.exe

Loads dropped DLL 1 IoCs

pid	Process
1960	Drawing&spec.scr

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x000700000001922c-8.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2988 set thread context of 2124	2988	unfatigued.exe	31

System Location Discovery: System Language Discovery 1 TTPs 3 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	Drawing&spec.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	unfatigued.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegSvcs.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2988	unfatigued.exe
2988	unfatigued.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2124	RegSvcs.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
1960	Drawing&spec.scr
1960	Drawing&spec.scr
2988	unfatigued.exe
2988	unfatigued.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1960	Drawing&spec.scr
1960	Drawing&spec.scr
2988	unfatigued.exe
2988	unfatigued.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1960 wrote to memory of 2988	1960	Drawing&spec.scr	30
PID 1960 wrote to memory of 2988	1960	Drawing&spec.scr	30
PID 1960 wrote to memory of 2988	1960	Drawing&spec.scr	30
PID 1960 wrote to memory of 2988	1960	Drawing&spec.scr	30
PID 2988 wrote to memory of 2124	2988	unfatigued.exe	31
PID 2988 wrote to memory of 2124	2988	unfatigued.exe	31
PID 2988 wrote to memory of 2124	2988	unfatigued.exe	31
PID 2988 wrote to memory of 2124	2988	unfatigued.exe	31
PID 2988 wrote to memory of 2124	2988	unfatigued.exe	31
PID 2988 wrote to memory of 2124	2988	unfatigued.exe	31
PID 2988 wrote to memory of 2124	2988	unfatigued.exe	31
PID 2988 wrote to memory of 2124	2988	unfatigued.exe	31

C:\Users\Admin\AppData\Local\Temp\Drawing&spec.scr
"C:\Users\Admin\AppData\Local\Temp\Drawing&spec.scr" /S
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1960
- C:\Users\Admin\AppData\Local\iodite\unfatigued.exe
  "C:\Users\Admin\AppData\Local\Temp\Drawing&spec.scr" /S
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2988
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Users\Admin\AppData\Local\Temp\Drawing&spec.scr" /S
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2124

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabDFB7.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarF694.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\intersentimental

Filesize
45KB

MD5
064c06ce3704ac5ce2d8efeb296a9422

SHA1
dcc706429d796903bcd7e77d41e5981beff878f4

SHA256
819cc43386c4eb72d4ae4e4edcf9eb5f0a654dfe3b56b45c5f9a9d553bc9cc82

SHA512
423fda98347db0f083a74c758b8526119a87e0944a067503d380c504e3ad9a341c122f721f86bb75bb9aa2f1017d4bad6c298bcbcc98e8fb1dcef722919205de

Download Submit
\Users\Admin\AppData\Local\iodite\unfatigued.exe

Filesize
941KB

MD5
3a43f4d6c1ce25bc8efe548fa2b16bc7

SHA1
e0b8080d2c241ee9c8d7d31adb6ecc0fc43d0a0e

SHA256
4b5cc1e99d28651fbb693422c5d392c5d47dfa61c8ec4995197706de5cb3442a

SHA512
3613b2af89545273fb21c09889e02e477d86ac2e3f313fec2a28fb68c9e94b39b3160b26d7637dce1e5053808ffe14cb0aad9dd0c404bbd6d4c8d7ea897e8072

Download Submit
memory/1960-6-0x00000000008F0000-0x0000000000CF0000-memory.dmp

Filesize
4.0MB

Download
memory/2124-32-0x00000000741BE000-0x00000000741BF000-memory.dmp

Filesize
4KB

Download
memory/2124-31-0x0000000000090000-0x00000000000A2000-memory.dmp

Filesize
72KB

Download
memory/2124-28-0x0000000000090000-0x00000000000A2000-memory.dmp

Filesize
72KB

Download
memory/2124-24-0x0000000000090000-0x00000000000A2000-memory.dmp

Filesize
72KB

Download
memory/2124-33-0x00000000741BE000-0x00000000741BF000-memory.dmp

Filesize
4KB

Download
memory/2124-34-0x00000000741B0000-0x000000007489E000-memory.dmp

Filesize
6.9MB

Download
memory/2124-22-0x0000000000090000-0x00000000000A2000-memory.dmp

Filesize
72KB

Download
memory/2124-51-0x0000000005FF0000-0x000000000608C000-memory.dmp

Filesize
624KB

Download
memory/2124-70-0x0000000004380000-0x00000000043C0000-memory.dmp

Filesize
256KB

Download
memory/2124-71-0x0000000000880000-0x000000000088A000-memory.dmp

Filesize
40KB

Download
memory/2124-72-0x00000000741B0000-0x000000007489E000-memory.dmp

Filesize
6.9MB

Download
memory/2988-20-0x0000000000B80000-0x0000000000F80000-memory.dmp

Filesize
4.0MB

Download

Analysis

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