asyncrat | ddf531ca3e77535cc8218015b2b2eaf0f7f2cb7f8cad09d3cbaea3278481d538

General

Target

tmp_0tdvx_8.exe
Size

258KB
MD5

1e69645ce8569c4eb86bff0904ec709a
SHA1

872dbb62d85b8ff7ecc0543b2038410c7006daa4
SHA256

ddf531ca3e77535cc8218015b2b2eaf0f7f2cb7f8cad09d3cbaea3278481d538
SHA512

a893de4baf4bc86d2677a41598e5b45b2d4b6d092de4bd66c0283344bb2b8176f3c8aae757af8427fd8e6d03370bd127d8a32790e505b932560b2bc07812aa8a
SSDEEP

1536:ZtCvd/g9bzMf2IxlBXOA7W2+IFqHCRTGA:kd/g9bzMeIxlBeA7W2+IFqHCRT

Score

10^/10

asyncrat 27-07-2024 discovery rat

Malware Config

Extracted

Family

asyncrat

Version

AWS | 3Losh

Botnet

27-07-2024

C2

127.0.0.1:6000

104.243.32.185:6000

Mutex

AsyncMutex_alosh

Attributes

delay
3
install
false
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\fontdrvhost.lnk	fontdrvhost.exe

Executes dropped EXE 1 IoCs

pid	Process
2428	fontdrvhost.exe

Loads dropped DLL 2 IoCs

pid	Process
1964	tmp_0tdvx_8.exe
1964	tmp_0tdvx_8.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2428 set thread context of 2852	2428	fontdrvhost.exe	31

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 1 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	aspnet_compiler.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2428	fontdrvhost.exe
Token: SeDebugPrivilege	2852	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 2428	1964	tmp_0tdvx_8.exe	30
PID 1964 wrote to memory of 2428	1964	tmp_0tdvx_8.exe	30
PID 1964 wrote to memory of 2428	1964	tmp_0tdvx_8.exe	30
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31
PID 2428 wrote to memory of 2852	2428	fontdrvhost.exe	31

C:\Users\Admin\AppData\Local\Temp\tmp_0tdvx_8.exe
"C:\Users\Admin\AppData\Local\Temp\tmp_0tdvx_8.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1964
- C:\Users\Admin\AppData\Local\Microsoft\fontdrvhost.exe
  "C:\Users\Admin\AppData\Local\Microsoft\fontdrvhost.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2428
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\fontdrvhost.exe

Filesize
258KB

MD5
1e69645ce8569c4eb86bff0904ec709a

SHA1
872dbb62d85b8ff7ecc0543b2038410c7006daa4

SHA256
ddf531ca3e77535cc8218015b2b2eaf0f7f2cb7f8cad09d3cbaea3278481d538

SHA512
a893de4baf4bc86d2677a41598e5b45b2d4b6d092de4bd66c0283344bb2b8176f3c8aae757af8427fd8e6d03370bd127d8a32790e505b932560b2bc07812aa8a

Download Submit
C:\Users\Admin\AppData\Local\Temp\CabC286.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarD7FC.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
memory/1964-1-0x000000013FC60000-0x000000013FCA6000-memory.dmp

Filesize
280KB

Download
memory/1964-0-0x000007FEF5883000-0x000007FEF5884000-memory.dmp

Filesize
4KB

Download
memory/2428-24-0x000007FEF4E90000-0x000007FEF587C000-memory.dmp

Filesize
9.9MB

Download
memory/2428-11-0x000000013F940000-0x000000013F986000-memory.dmp

Filesize
280KB

Download
memory/2428-13-0x000007FEF4E90000-0x000007FEF587C000-memory.dmp

Filesize
9.9MB

Download
memory/2852-18-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2852-14-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2852-21-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2852-23-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2852-15-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2852-16-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/2852-19-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

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