asyncrat | 3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482

General

Target

3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
Size

44KB
MD5

6866a6b356c2df2bf347ffd2ac4305ca
SHA1

29d9deefbf03a374038d171983c95db84a3cba78
SHA256

3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482
SHA512

eb44c4b40a8f24b7da45093e3b0f020abcc42a4dac812529fd2ea559e2bb58c4b41467ce557511779c535d71816963f183dfe6efe2646852a050d53421ced4f7
SSDEEP

768:zioSUQ4tbx4jLxx2jBHUyYb7qoK2TazjbzgX3iMIfd0wxi6hUHil:zJ24txjJUyWHK2u3bsXSMIF0wU0UHil

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

10.81.36.45:6606

Mutex

LfKMo3uFrnKq

Attributes

delay
3
install
true
install_file
test.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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x001b00000002ae8a-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2404	test.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	test.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4940	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
2808	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
Token: SeDebugPrivilege	2404	test.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3144 wrote to memory of 3400	3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe	78
PID 3144 wrote to memory of 3400	3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe	78
PID 3144 wrote to memory of 3400	3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe	78
PID 3144 wrote to memory of 3564	3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe	80
PID 3144 wrote to memory of 3564	3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe	80
PID 3144 wrote to memory of 3564	3144	3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe	80
PID 3400 wrote to memory of 2808	3400	cmd.exe	82
PID 3400 wrote to memory of 2808	3400	cmd.exe	82
PID 3400 wrote to memory of 2808	3400	cmd.exe	82
PID 3564 wrote to memory of 4940	3564	cmd.exe	83
PID 3564 wrote to memory of 4940	3564	cmd.exe	83
PID 3564 wrote to memory of 4940	3564	cmd.exe	83
PID 3564 wrote to memory of 2404	3564	cmd.exe	84
PID 3564 wrote to memory of 2404	3564	cmd.exe	84
PID 3564 wrote to memory of 2404	3564	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe
"C:\Users\Admin\AppData\Local\Temp\3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3144
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3400
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2808
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp32B3.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3564
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4940
- - C:\Users\Admin\AppData\Roaming\test.exe
    "C:\Users\Admin\AppData\Roaming\test.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2404

Network

MITRE ATT&CK Enterprise v16

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp32B3.tmp.bat

Filesize
148B

MD5
4cf620d300f6bf6e22b69033165de840

SHA1
05546e0c25d6eac12ba67e4dea287b15919ccbc2

SHA256
9108991b84e91a93df7e5bad82592fc602e9e82f070371f1e38b9ed723ce1cc2

SHA512
473f6eed72e1e964098c59d1c8d9b25c2e585d6be3bb31c51c4ac036f216777443092dd71f4f8e9efc76b72c53b66088e97aa0c9848867a8fff6f99c8fe7148b

Download Submit
C:\Users\Admin\AppData\Roaming\test.exe

Filesize
44KB

MD5
6866a6b356c2df2bf347ffd2ac4305ca

SHA1
29d9deefbf03a374038d171983c95db84a3cba78

SHA256
3797bf6a25ea42774008d2879b53875e2a8c1d1423dff8b7290a17780b93c482

SHA512
eb44c4b40a8f24b7da45093e3b0f020abcc42a4dac812529fd2ea559e2bb58c4b41467ce557511779c535d71816963f183dfe6efe2646852a050d53421ced4f7

Download Submit
memory/2404-13-0x0000000074DD0000-0x0000000075581000-memory.dmp

Filesize
7.7MB

Download
memory/2404-14-0x0000000074DD0000-0x0000000075581000-memory.dmp

Filesize
7.7MB

Download
memory/3144-0-0x0000000074DFE000-0x0000000074DFF000-memory.dmp

Filesize
4KB

Download
memory/3144-1-0x0000000000E10000-0x0000000000E22000-memory.dmp

Filesize
72KB

Download
memory/3144-2-0x0000000074DF0000-0x00000000755A1000-memory.dmp

Filesize
7.7MB

Download
memory/3144-3-0x00000000058F0000-0x000000000598C000-memory.dmp

Filesize
624KB

Download
memory/3144-8-0x0000000074DF0000-0x00000000755A1000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads