asyncrat | 6e037135b5dc8ce75267fcc8215a48041ef8ffa1409dad74799d1295b66f7321

General

Target

crackers.exe
Size

47KB
MD5

c293f3aa9309bdbbea7ce7b82c555e8e
SHA1

69d4edbf51feb07fa5a87eae76418b40de34f72c
SHA256

d61d9974e73631319c87de439a9a018488795e1d31f12a29092a1a90113f0fb0
SHA512

d77b24dafe769fd9ba7bf52a6847ccb217c7e4d3af6adf1837cfcfb151c02acc02cc4ae046e4498f39209c083c188b41ae3d57cda427afbd0ece1d446c11396d
SSDEEP

768:Eu4X9TskvpDWUPlNxmo2qbxLwhRLQ2XyytPIzx4jMZ0bpKRP4tgmcZbKBDZ8x:Eu4X9Tswb2BRL9Xy3zmjMebpKN4th9d+

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:1194

193.161.193.99:1194

Mutex

PX50IrcSQ5Gg

Attributes

delay
3
install
true
install_file
crackers.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
behavioral1/files/0x001f00000002aaff-11.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
704	crackers.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	crackers.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	crackers.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
4124	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
3368	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe
2576	crackers.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2576	crackers.exe
Token: SeDebugPrivilege	704	crackers.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2576 wrote to memory of 4980	2576	crackers.exe	77
PID 2576 wrote to memory of 4980	2576	crackers.exe	77
PID 2576 wrote to memory of 4980	2576	crackers.exe	77
PID 2576 wrote to memory of 788	2576	crackers.exe	79
PID 2576 wrote to memory of 788	2576	crackers.exe	79
PID 2576 wrote to memory of 788	2576	crackers.exe	79
PID 788 wrote to memory of 4124	788	cmd.exe	81
PID 788 wrote to memory of 4124	788	cmd.exe	81
PID 788 wrote to memory of 4124	788	cmd.exe	81
PID 4980 wrote to memory of 3368	4980	cmd.exe	82
PID 4980 wrote to memory of 3368	4980	cmd.exe	82
PID 4980 wrote to memory of 3368	4980	cmd.exe	82
PID 788 wrote to memory of 704	788	cmd.exe	83
PID 788 wrote to memory of 704	788	cmd.exe	83
PID 788 wrote to memory of 704	788	cmd.exe	83

C:\Users\Admin\AppData\Local\Temp\crackers.exe
"C:\Users\Admin\AppData\Local\Temp\crackers.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2576
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "crackers" /tr '"C:\Users\Admin\AppData\Roaming\crackers.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4980
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "crackers" /tr '"C:\Users\Admin\AppData\Roaming\crackers.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3368
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA018.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:788
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4124
- - C:\Users\Admin\AppData\Roaming\crackers.exe
    "C:\Users\Admin\AppData\Roaming\crackers.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:704

Network

MITRE ATT&CK Enterprise v15

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\Microsoft\CLR_v4.0_32\UsageLogs\crackers.exe.log

Filesize
522B

MD5
db9f45365506c49961bfaf3be1475ad2

SHA1
6bd7222f7b7e3e9685207cb285091c92728168e4

SHA256
3a8c487575696f7ace931dc220c85a47d33e0ead96aa9e47c705fee5dfac667a

SHA512
807028e2aed5b25b2d19ec4f09867746456de4e506c90c73e6730b35303511349a79ca0b9290509664edc0433d47e3fc7f2661534293ebb82185b1494da86a41

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA018.tmp.bat

Filesize
152B

MD5
92a3847316b6c06c5898e8afd2f17340

SHA1
a856061b4bd90152d86e1ec655898b97fb61f27e

SHA256
ad2526ce8c3fa16159677628689b04eb37a03c9cdb47d646af3cbf15782a4dd1

SHA512
2899fe7c66bc172f654dddafd8374c4ea575fc9f0b8efa5ef86fc34e6f371a14c48c3b1c62bffc03d5e341745e5e6721b2f525ba52f85ecc918d14e1a35fc677

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

Filesize
47KB

MD5
c293f3aa9309bdbbea7ce7b82c555e8e

SHA1
69d4edbf51feb07fa5a87eae76418b40de34f72c

SHA256
d61d9974e73631319c87de439a9a018488795e1d31f12a29092a1a90113f0fb0

SHA512
d77b24dafe769fd9ba7bf52a6847ccb217c7e4d3af6adf1837cfcfb151c02acc02cc4ae046e4498f39209c083c188b41ae3d57cda427afbd0ece1d446c11396d

Download Submit
memory/704-14-0x00000000744B0000-0x0000000074C61000-memory.dmp

Filesize
7.7MB

Download
memory/704-15-0x00000000744B0000-0x0000000074C61000-memory.dmp

Filesize
7.7MB

Download
memory/2576-0-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/2576-1-0x0000000000BC0000-0x0000000000BD2000-memory.dmp

Filesize
72KB

Download
memory/2576-2-0x00000000744B0000-0x0000000074C61000-memory.dmp

Filesize
7.7MB

Download
memory/2576-3-0x00000000056D0000-0x000000000576C000-memory.dmp

Filesize
624KB

Download
memory/2576-8-0x00000000744B0000-0x0000000074C61000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads