asyncrat | ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0

General

Target

ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0.exe
Size

276KB
MD5

c7a0b1673cefe5ade7f9d5f96bd4bc85
SHA1

cd0a62a731f1e4c104d214164035950d274762d9
SHA256

ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0
SHA512

ca706565e19b4209b78915d4489fc61ba77dc8d049f52ae02a8918534462471a01c25dfafd8c92fc4b5570830368d0d2f8ce726a7def5878ced7725f199afbfd
SSDEEP

768:uLFXd/g9buJS+3RrP8ftYY5l4LyM2jWbGvhjpZpfeN2:eFXd/g9buMWz8fCY74LD2jWavjZpfeN

Score

10^/10

asyncrat 8/4/2004 discovery rat

Malware Config

Extracted

Family

asyncrat

Version

| Edit by Vinom Rat

Botnet

8/4/2004

C2

luxeloot.info:2005

Mutex

AsyncMutex_345JNFV3c

Attributes

delay
3
install
false
install_file
ANON.EXE.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat 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
2360	fontdrvhost.exe

Loads dropped DLL 2 IoCs

pid	Process
2564	ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0.exe
2564	ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2360 set thread context of 3008	2360	fontdrvhost.exe	30

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 behavior: EnumeratesProcesses 1 IoCs

pid	Process
3008	aspnet_compiler.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2360	fontdrvhost.exe
Token: SeDebugPrivilege	3008	aspnet_compiler.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3008	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2564 wrote to memory of 2360	2564	ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0.exe	29
PID 2564 wrote to memory of 2360	2564	ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0.exe	29
PID 2564 wrote to memory of 2360	2564	ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0.exe	29
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30
PID 2360 wrote to memory of 3008	2360	fontdrvhost.exe	30

C:\Users\Admin\AppData\Local\Temp\ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0.exe
"C:\Users\Admin\AppData\Local\Temp\ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2564
- 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:2360
- - 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 behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:3008

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\Temp\Cab9639.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
\Users\Admin\AppData\Local\Microsoft\fontdrvhost.exe

Filesize
276KB

MD5
c7a0b1673cefe5ade7f9d5f96bd4bc85

SHA1
cd0a62a731f1e4c104d214164035950d274762d9

SHA256
ba357d25a91a07eb86e1412b47aa9e64b55c1b9bec4900d25726d615555d76b0

SHA512
ca706565e19b4209b78915d4489fc61ba77dc8d049f52ae02a8918534462471a01c25dfafd8c92fc4b5570830368d0d2f8ce726a7def5878ced7725f199afbfd

Download Submit
memory/2360-11-0x000000013F9A0000-0x000000013F9EA000-memory.dmp

Filesize
296KB

Download
memory/2360-12-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

Filesize
9.9MB

Download
memory/2360-14-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

Filesize
9.9MB

Download
memory/2360-25-0x000007FEF5F00000-0x000007FEF68EC000-memory.dmp

Filesize
9.9MB

Download
memory/2564-1-0x000000013F740000-0x000000013F78A000-memory.dmp

Filesize
296KB

Download
memory/2564-0-0x000007FEF5F03000-0x000007FEF5F04000-memory.dmp

Filesize
4KB

Download
memory/3008-24-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3008-20-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3008-19-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3008-17-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3008-16-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3008-15-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/3008-22-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download

Analysis

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