asyncrat | e3ec61e0c6ac38b3d6d1371fa70634fa7f1b9bbefc7b2980d875982ba852ec63

General

Target

AWB#5305323204643,pdf.exe
Size

180KB
MD5

9be5fc19a414a94352b127af2424ac86
SHA1

8ae697c2bce8190f4bc324e0553ca111dd9bb8a6
SHA256

fba5658815c50ae760c7baf3e1bd1bc7f3f78a7bf71066c4b4502b755b35826c
SHA512

2486d1945fcf5491db7ee9938a327fcfb1f88d98be52d4c7905a79821cc3188e030a44892364c2c6d38c6154dfef98f0423f75a8078c004183e192706889705d

Score

10^/10

asyncrat may11thup rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

MAY11thUP

Mutex

chizzy25@!7^UP

Attributes

delay
3
install
false
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/HKYwiN9V

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/428-138-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

AWB#5305323204643,pdf.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	AWB#5305323204643,pdf.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of SetThreadContext 1 IoCs

Processes:

AWB#5305323204643,pdf.exe

description pid process target process

PID 3976 set thread context of 428 3976 AWB#5305323204643,pdf.exe MSBuild.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

4452 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

AWB#5305323204643,pdf.exe

pid process

3976 AWB#5305323204643,pdf.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

AWB#5305323204643,pdf.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 3976 AWB#5305323204643,pdf.exe
Token: SeDebugPrivilege 428 MSBuild.exe

description	pid	process	target process
PID 3976 set thread context of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe

pid	process
4452	schtasks.exe

pid	process
3976	AWB#5305323204643,pdf.exe

description	pid	process
Token: SeDebugPrivilege	3976	AWB#5305323204643,pdf.exe
Token: SeDebugPrivilege	428	MSBuild.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

AWB#5305323204643,pdf.exe

description	pid	process	target process
PID 3976 wrote to memory of 4452	3976	AWB#5305323204643,pdf.exe	schtasks.exe
PID 3976 wrote to memory of 4452	3976	AWB#5305323204643,pdf.exe	schtasks.exe
PID 3976 wrote to memory of 4452	3976	AWB#5305323204643,pdf.exe	schtasks.exe
PID 3976 wrote to memory of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe
PID 3976 wrote to memory of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe
PID 3976 wrote to memory of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe
PID 3976 wrote to memory of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe
PID 3976 wrote to memory of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe
PID 3976 wrote to memory of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe
PID 3976 wrote to memory of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe
PID 3976 wrote to memory of 428	3976	AWB#5305323204643,pdf.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\AWB#5305323204643,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\AWB#5305323204643,pdf.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3976
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RDUkhaY" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7091.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4452
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  "{path}"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:428

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Web Service

1

T1102

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp7091.tmp

Filesize
1KB

MD5
e491de679c8b08ce4692521e1d96e0c1

SHA1
a88352ce45f068382ec2388695a0558dc4742767

SHA256
5214a84421098f05d1aad33bdead6df92fe09c703a6bf21818330c38658507d1

SHA512
531dfcf7cf618034f8d75573e5c509c7e7c79bfe438d871c12eafe0e8f903fc0133f6f1e03ec99943796196091b63956f54ac15766d6fdb5a8d7df38f559e520

Download Submit
memory/428-137-0x0000000000000000-mapping.dmp

Download
memory/428-138-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3976-130-0x0000000000660000-0x0000000000694000-memory.dmp

Filesize
208KB

Download
memory/3976-131-0x00000000055A0000-0x0000000005B44000-memory.dmp

Filesize
5.6MB

Download
memory/3976-132-0x0000000005090000-0x0000000005122000-memory.dmp

Filesize
584KB

Download
memory/3976-133-0x0000000005040000-0x000000000504A000-memory.dmp

Filesize
40KB

Download
memory/3976-134-0x0000000008D50000-0x0000000008DEC000-memory.dmp

Filesize
624KB

Download
memory/4452-135-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads