asyncrat | 8a7d20fb5bc7ef8b02ab6e11ef78ebc0a31ba5376bd97d40fe5d1da521324556

Resubmissions

08-06-2024 18:20

240608-wyz2hafb42 10

08-06-2024 18:17

240608-ww7cssec5w 10

08-06-2024 18:11

240608-ws439seb9v 10

19-05-2024 22:48

240519-2rh3asfb62 10

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
19-05-2024 22:48

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General

Target

XWorm-Rat-Remote-Administration-Tool--main/dnlib.exe
Size

12KB
MD5

6967b97ce4ff4524883a196a97736275
SHA1

6fdf2b9adc16b40a06bacc7db0abee917ef4abd3
SHA256

e2bddf56324addac02678a7fd8d9c3da24ad55132883ad826a1a60eaf4e4a034
SHA512

c71525d49e36975cb43535cff5176409163b14f53b644e3d161fd56f7514f0affbda051541a07d9af4cdc45a564dfad20a23584701499a0f03e531219c9f72be
SSDEEP

192:zLlo6IXsbK9CLPN0LWyJUMmYVY2QQq33WrmRaadrq8uSF3:PljIeyCLPN0CUUMme3o3mrmRJUSF

Score

10^/10

asyncrat def rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

def

37.18.62.18:8060

Mutex

era2312swe12-1213rsgdkms23

Attributes

delay
1
install
true
install_file
CCXProcess.exe
install_folder
%Temp%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\sysfile32.exe	family_asyncrat

Downloads MZ/PE file
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:

dnlib.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation dnlib.exe
Executes dropped EXE 1 IoCs

Processes:

sysfile32.exe

pid process

5036 sysfile32.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

13 raw.githubusercontent.com
14 raw.githubusercontent.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

dnlib.exe

pid process

4964 dnlib.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

dnlib.exe

description pid process

Token: SeDebugPrivilege 4964 dnlib.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	dnlib.exe

pid	process
5036	sysfile32.exe

flow	ioc
13	raw.githubusercontent.com
14	raw.githubusercontent.com

pid	process
4964	dnlib.exe

description	pid	process
Token: SeDebugPrivilege	4964	dnlib.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

dnlib.exe

description	pid	process	target process
PID 4964 wrote to memory of 5036	4964	dnlib.exe	sysfile32.exe
PID 4964 wrote to memory of 5036	4964	dnlib.exe	sysfile32.exe

C:\Users\Admin\AppData\Local\Temp\XWorm-Rat-Remote-Administration-Tool--main\dnlib.exe
"C:\Users\Admin\AppData\Local\Temp\XWorm-Rat-Remote-Administration-Tool--main\dnlib.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4964

C:\Users\Admin\AppData\Local\Temp\sysfile32.exe
"C:\Users\Admin\AppData\Local\Temp\sysfile32.exe"
2⤵
- Executes dropped EXE
PID:5036

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

T1102

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1rpq1o14.ngc.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\sysfile32.exe
Filesize
52KB

MD5
0c2d61d64f4325ca752202e5bf792e9e

SHA1
e7655910a124dd10beb774a693f7caccf849b438

SHA256
d0dd06d26f09eed4755de33c63e29aeb8161cd9b0ca123af3474c5594df57ec1

SHA512
1205a69419c38605e9a84200b1cc7731a3e169fae265dfc324a9edaf98bbc06f110bdf63d08f6b97d312cd0ce1fffe9ef8649f116ac27eb8b659ad88519d9c46

Download Submit
memory/4964-0-0x00007FFDB2F23000-0x00007FFDB2F25000-memory.dmp

Filesize
8KB

Download
memory/4964-1-0x00000000000A0000-0x00000000000A8000-memory.dmp

Filesize
32KB

Download
memory/4964-11-0x000000001ABF0000-0x000000001AC12000-memory.dmp

Filesize
136KB

Download
memory/4964-12-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

Filesize
10.8MB

Download
memory/4964-28-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

Filesize
10.8MB

Download
memory/5036-26-0x0000000000B30000-0x0000000000B42000-memory.dmp

Filesize
72KB

Download
memory/5036-27-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

Filesize
10.8MB

Download
memory/5036-29-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

Filesize
10.8MB

Download
memory/5036-30-0x00007FFDB2F20000-0x00007FFDB39E1000-memory.dmp

Filesize
10.8MB

Download