asyncrat | 37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
07-08-2024 01:17

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General

Target

37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe
Size

2.1MB
MD5

d9d0ba1c1cc0dd9243f36fba8b1147ad
SHA1

eae15f17ee26ede826b934733e16762cd61c89fa
SHA256

37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58
SHA512

304503d20998426c25f8f12ff9907831e0184b5ac911a0ce45addec385cac82dc070a56ad8630b404a41023fb56140dda9498d8f1a659a77df2b944ebb6da6b9
SSDEEP

6144:2TrjyPf1/pNLbtbTvspnI5p3YCmMuHrXOrfE8HiTAnnQUoJwS4LY5qhR:2TWBnjspnIb//XT7EAQPn4LJD

Score

10^/10

asyncrat 2money discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

2MONEY

twart.myfirewall.org:14143

Mutex

FEjYSsXzhpZixwA

Attributes

delay
20
install
true
install_file
svchost.exe
install_folder
%Temp%

aes.plain

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
1876	svchost.exe

Loads dropped DLL 1 IoCs

pid	Process
2760	cmd.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1760 set thread context of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31

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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AddInProcess32.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

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2908	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
2876	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2636	AddInProcess32.exe
2636	AddInProcess32.exe
2636	AddInProcess32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2636	AddInProcess32.exe

Suspicious use of WriteProcessMemory 32 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2636	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	31
PID 1760 wrote to memory of 2580	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	32
PID 1760 wrote to memory of 2580	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	32
PID 1760 wrote to memory of 2580	1760	37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe	32
PID 2636 wrote to memory of 2708	2636	AddInProcess32.exe	34
PID 2636 wrote to memory of 2708	2636	AddInProcess32.exe	34
PID 2636 wrote to memory of 2708	2636	AddInProcess32.exe	34
PID 2636 wrote to memory of 2708	2636	AddInProcess32.exe	34
PID 2636 wrote to memory of 2760	2636	AddInProcess32.exe	36
PID 2636 wrote to memory of 2760	2636	AddInProcess32.exe	36
PID 2636 wrote to memory of 2760	2636	AddInProcess32.exe	36
PID 2636 wrote to memory of 2760	2636	AddInProcess32.exe	36
PID 2708 wrote to memory of 2876	2708	cmd.exe	38
PID 2708 wrote to memory of 2876	2708	cmd.exe	38
PID 2708 wrote to memory of 2876	2708	cmd.exe	38
PID 2708 wrote to memory of 2876	2708	cmd.exe	38
PID 2760 wrote to memory of 2908	2760	cmd.exe	39
PID 2760 wrote to memory of 2908	2760	cmd.exe	39
PID 2760 wrote to memory of 2908	2760	cmd.exe	39
PID 2760 wrote to memory of 2908	2760	cmd.exe	39
PID 2760 wrote to memory of 1876	2760	cmd.exe	40
PID 2760 wrote to memory of 1876	2760	cmd.exe	40
PID 2760 wrote to memory of 1876	2760	cmd.exe	40
PID 2760 wrote to memory of 1876	2760	cmd.exe	40

C:\Users\Admin\AppData\Local\Temp\37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe
"C:\Users\Admin\AppData\Local\Temp\37f7dc1e5403ed4babd766ca88445f0c0fd555af19a5b669123660c262cc3f58.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AddInProcess32.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2636
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Local\Temp\svchost.exe"' & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2708
  - - C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Local\Temp\svchost.exe"'
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2876
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp4A88.tmp.bat""
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2760
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      System Location Discovery: System Language Discovery
      Delays execution with timeout.exe
      PID:2908
  - - C:\Users\Admin\AppData\Local\Temp\svchost.exe
      "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:1876
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 1760 -s 624
  2⤵
  PID:2580

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp4A88.tmp.bat

Filesize
154B

MD5
49e21054dc229073d63251dfb2f00904

SHA1
f7cf081598a9e375b6a072180176a6aebeaf1682

SHA256
3b60a069c58bb2b91ddc3879137bfc3f5c8edddd2ab8fd04ca2f77b2cb12e2b3

SHA512
750841800c5341c9aaffe29e874e9ef98514e05b2577b6a2401351596370ebb0917c31da7b07ffc92c38b3ce89b397d0d49c6cdee19de4ff1b5ae6c2d3831926

Download Submit
\Users\Admin\AppData\Local\Temp\svchost.exe

Filesize
41KB

MD5
6a673bfc3b67ae9782cb31af2f234c68

SHA1
7544e89566d91e84e3cd437b9a073e5f6b56566e

SHA256
978a4093058aa2ebf05dc353897d90d950324389879b57741b64160825b5ec0e

SHA512
72c302372ce87ceda2a3c70a6005d3f9c112f1641bc7fe6824c718971233e66c07e2996d2785fa358566c38714c25ea812c05c7cfd2f588284849d495fd24f39

Download Submit
memory/1760-20-0x000007FEF5B23000-0x000007FEF5B24000-memory.dmp

Filesize
4KB

Download
memory/1760-1-0x00000000002D0000-0x00000000002DC000-memory.dmp

Filesize
48KB

Download
memory/1760-2-0x0000000000020000-0x0000000000026000-memory.dmp

Filesize
24KB

Download
memory/1760-3-0x000007FEF5B20000-0x000007FEF650C000-memory.dmp

Filesize
9.9MB

Download
memory/1760-4-0x00000000003E0000-0x0000000000446000-memory.dmp

Filesize
408KB

Download
memory/1760-0-0x000007FEF5B23000-0x000007FEF5B24000-memory.dmp

Filesize
4KB

Download
memory/1760-21-0x000007FEF5B20000-0x000007FEF650C000-memory.dmp

Filesize
9.9MB

Download
memory/1876-36-0x0000000001350000-0x000000000135C000-memory.dmp

Filesize
48KB

Download
memory/2636-5-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2636-16-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2636-18-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2636-19-0x0000000074B9E000-0x0000000074B9F000-memory.dmp

Filesize
4KB

Download
memory/2636-7-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2636-9-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2636-22-0x0000000074B90000-0x000000007527E000-memory.dmp

Filesize
6.9MB

Download
memory/2636-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2636-32-0x0000000074B90000-0x000000007527E000-memory.dmp

Filesize
6.9MB

Download
memory/2636-14-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2636-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download