asyncrat | 2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1

Analysis

max time kernel
153s
max time network
198s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2022 18:00

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General

Target

2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe
Size

256KB
MD5

bf0cbeab3c925e5a771ed3ed411fab3b
SHA1

d83838de4edc5a17df8b56b6a3ce4004d3b501b6
SHA256

2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1
SHA512

f46907adb82310883e3eb70c275ab96c61359626f4e34bfb957fcbc7a863e2c4c501d85c788cd103f2d52e2dd707960b0000def781de24390db855fae40c7f28
SSDEEP

3072:ciZtc8bFRHCreEUt8At30cwPU5giWkTalWr1UVtUp:cinbt8c30cwPAU/

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

dropout-35209.portmap.host:35209

dropout-35209.portmap.host:44444

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 3 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\Documents\AsyncClient.exe	asyncrat
C:\Users\Admin\Documents\AsyncClient.exe	asyncrat
behavioral2/memory/4680-137-0x00000000006A0000-0x00000000006B2000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

Processes:

AsyncClient.exe

pid process

4680 AsyncClient.exe

pid	process
4680	AsyncClient.exe

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:

2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation	2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe

pid	process
4420	2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe
4420	2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe

description pid process

Token: SeDebugPrivilege 4420 2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe

description	pid	process
Token: SeDebugPrivilege	4420	2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe

description	pid	process	target process
PID 4420 wrote to memory of 4680	4420	2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe	AsyncClient.exe
PID 4420 wrote to memory of 4680	4420	2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe	AsyncClient.exe
PID 4420 wrote to memory of 4680	4420	2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe	AsyncClient.exe

C:\Users\Admin\AppData\Local\Temp\2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe
"C:\Users\Admin\AppData\Local\Temp\2a53484075daf8f8b6e724f6ad4987d3f097370b8ee8dd9612207365667a9ab1.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4420

C:\Users\Admin\Documents\AsyncClient.exe
"C:\Users\Admin\Documents\AsyncClient.exe"
2⤵
- Executes dropped EXE
PID:4680

Network

MITRE ATT&CK Matrix ATT&CK v6

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

Impact

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Downloads

C:\Users\Admin\Documents\AsyncClient.exe
Filesize
45KB

MD5
cc2527a2a6ab92dbe18334903108651b

SHA1
348aea2799cfbff5444a96199051237a0cffbc57

SHA256
7c8d48491bd1de2c0224afe6866edf451306841293e3135f7dcfd1c376948a1a

SHA512
dd2d7c7cb5b9ad58f18ae29365e9a1394f2eb435b95302affcc2ca8c9b0f2a5088f4b7a23a9ac175077555a24ce0e6ece7b08cfe323e054155f80c8fcbcceb89

Download Submit
C:\Users\Admin\Documents\AsyncClient.exe
Filesize
45KB

MD5
cc2527a2a6ab92dbe18334903108651b

SHA1
348aea2799cfbff5444a96199051237a0cffbc57

SHA256
7c8d48491bd1de2c0224afe6866edf451306841293e3135f7dcfd1c376948a1a

SHA512
dd2d7c7cb5b9ad58f18ae29365e9a1394f2eb435b95302affcc2ca8c9b0f2a5088f4b7a23a9ac175077555a24ce0e6ece7b08cfe323e054155f80c8fcbcceb89

Download Submit
memory/4420-132-0x0000000000530000-0x0000000000576000-memory.dmp

Filesize
280KB

Download
memory/4420-133-0x0000000005510000-0x0000000005AB4000-memory.dmp

Filesize
5.6MB

Download
memory/4420-138-0x0000000005380000-0x0000000005412000-memory.dmp

Filesize
584KB

Download
memory/4680-134-0x0000000000000000-mapping.dmp

Download
memory/4680-137-0x00000000006A0000-0x00000000006B2000-memory.dmp

Filesize
72KB

Download