asyncrat | a09983abaf1f037e8da8a9ad18079a2ce26a1c0ac1e2948390a4e916d77440e3

General

Target
81ip.exe
Size 47KB
Sample260415-q73absf15p
SHA256 a09983abaf1f037e8da8a9ad18079a2ce26a1c0ac1e2948390a4e916d77440e3
MD5 4329ecab94983d0d5f5e3f2a48e6d9f3
SHA1 80c6eda739361a444c4324d78f20d1017eec47be
SHA512 f0f8a65136c4cff04e3c61878de9f2f64e1be7a08e240975dec30347d2914f1c1aae016da5fa4f1c2baada14e5602da42dc8e496d8b926f5ef352df9a9a73b9e
SSDEEP 768:ougGNTRAL97WUHZaiSpmo2q7aa9fkCR9Krrg48fPIoebojGPPN0btQXGS/SwXJPJ:ougGNTRQMB2lTCR9ypoeUbbtQXhj5Z4S
TLSH
T1BD233A003BE9813BF27E4F78A9F32155867AF2633502D64D1CC4429B5A13FC69652AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

91.242.179.84:6606
91.242.179.84:7707
91.242.179.84:8808
91.242.179.84:9001
91.242.179.62:6606
91.242.179.62:7707
91.242.179.62:8808
91.242.179.62:9001
81.163.111.127:6606
81.163.111.127:7707
81.163.111.127:8808
81.163.111.127:9001

Mutex

7VlVgRzlxcpk

Attributes

delay
3
install
true
install_file
svchost.exe
install_folder
%Temp%
local_host
127.0.0.1

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x002100000002b20d-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3200	svchost.exe
3104	svchost.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 7 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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	81ip.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3396	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
2904	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe
4368	81ip.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4368	81ip.exe
Token: SeDebugPrivilege	3200	svchost.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4368 wrote to memory of 920	4368	81ip.exe	80
PID 4368 wrote to memory of 3372	4368	81ip.exe	82
PID 920 wrote to memory of 2904	920	cmd.exe	84
PID 3372 wrote to memory of 3396	3372	cmd.exe	85
PID 3372 wrote to memory of 3104	3372	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\81ip.exe
"C:\Users\Admin\AppData\Local\Temp\81ip.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4368
- 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
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:920
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Local\Temp\svchost.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2904
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3208.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3372
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3396
- - C:\Users\Admin\AppData\Local\Temp\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3104

C:\Users\Admin\AppData\Local\Temp\svchost.exe
"C:\Users\Admin\AppData\Local\Temp\svchost.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3200

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

svchost.exe

Path C:\Users\Admin\AppData\Local\Temp\svchost.exe
Size 47KB
SHA256 a09983abaf1f037e8da8a9ad18079a2ce26a1c0ac1e2948390a4e916d77440e3
MD5 4329ecab94983d0d5f5e3f2a48e6d9f3
SHA1 80c6eda739361a444c4324d78f20d1017eec47be
SHA512 f0f8a65136c4cff04e3c61878de9f2f64e1be7a08e240975dec30347d2914f1c1aae016da5fa4f1c2baada14e5602da42dc8e496d8b926f5ef352df9a9a73b9e
SSDEEP 768:ougGNTRAL97WUHZaiSpmo2q7aa9fkCR9Krrg48fPIoebojGPPN0btQXGS/SwXJPJ:ougGNTRQMB2lTCR9ypoeUbbtQXhj5Z4S
TLSH
T1BD233A003BE9813BF27E4F78A9F32155867AF2633502D64D1CC4429B5A13FC69652AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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tmp3208.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp3208.tmp.bat
Size 154B
SHA256 d2621bd107a4df9710e8049b371313bdc4cca006b35b8d464792af0a3cbbf499
MD5 d55594b134b7239bf94e191c98a175ee
SHA1 1273db2e6be122f1bb8ee674958d781babdb9c51
SHA512 08ee3f13d63a2fc343bec435a16f8acb5c16320bcfa6adaee0bb4dc2854eefd8b61b34d3c1e3df1af5cb355950ea2ae86c520f1f3ac1173b55f04a474a8476e1
TLSH
T1E2C02B4291C7EA1E1D08282311FAD59DD2B22C1D3F41BFE0830C801D328188DF0EA341
MD5 SHA1 SHA512 TLSH

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memory/3104-12-0x0000000004E80000-0x0000000004E8B000-memory.dmp

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memory/3200-13-0x00000000050B0000-0x00000000050BB000-memory.dmp

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memory/4368-0-0x00000000002A0000-0x00000000002B2000-memory.dmp

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memory/4368-1-0x0000000004D80000-0x0000000004D90000-memory.dmp

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memory/4368-2-0x0000000004D90000-0x0000000004E2C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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