asyncrat | 6c7051d2b3a809e748a98a87a0a75270000a94bb0adc035965516c1573c49671

General

Target

AWB#5305323204669,pdf.exe
Size

233KB
MD5

dab03f72d77a672205cc10130d2654c6
SHA1

83241c5520fdfc26aa7fe4d282f7e7de9018616b
SHA256

79125331a3e97dca7542b0f146bcb41429eebf7b790014317463c9239601421a
SHA512

1fad7ea231e95080ceef91d02d972db60a8d9096a7d6b3c7d50243b62eb7b07999d1af919787c11f9d3bae8d0fe257e4b97b6fada39e0cf436ef6d00423b5262

Score

10^/10

asyncrat awkasundaynight coreentity rat rezer0

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

AWKASUNDAYNIGHT

Mutex

chizzy25@!7^UPC

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

CoreEntity .NET Packer 1 IoCs

A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

coreentity

Processes:

resource	yara_rule
behavioral1/memory/1856-56-0x00000000004B0000-0x00000000004B8000-memory.dmp	coreentity

Async RAT payload 6 IoCs

rat

Processes:

resource	yara_rule
behavioral1/memory/2028-63-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2028-64-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2028-65-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2028-66-0x000000000040C73E-mapping.dmp	asyncrat
behavioral1/memory/2028-68-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral1/memory/2028-70-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

Processes:

resource	yara_rule
behavioral1/memory/1856-57-0x0000000000B40000-0x0000000000B58000-memory.dmp	rezer0

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of SetThreadContext 1 IoCs

Processes:

AWB#5305323204669,pdf.exe

description pid process target process

PID 1856 set thread context of 2028 1856 AWB#5305323204669,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

1164 schtasks.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

AWB#5305323204669,pdf.exe

pid process

1856 AWB#5305323204669,pdf.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

AWB#5305323204669,pdf.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 1856 AWB#5305323204669,pdf.exe
Token: SeDebugPrivilege 2028 MSBuild.exe

description	pid	process	target process
PID 1856 set thread context of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe

pid	process
1164	schtasks.exe

pid	process
1856	AWB#5305323204669,pdf.exe

description	pid	process
Token: SeDebugPrivilege	1856	AWB#5305323204669,pdf.exe
Token: SeDebugPrivilege	2028	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

AWB#5305323204669,pdf.exe

description	pid	process	target process
PID 1856 wrote to memory of 1164	1856	AWB#5305323204669,pdf.exe	schtasks.exe
PID 1856 wrote to memory of 1164	1856	AWB#5305323204669,pdf.exe	schtasks.exe
PID 1856 wrote to memory of 1164	1856	AWB#5305323204669,pdf.exe	schtasks.exe
PID 1856 wrote to memory of 1164	1856	AWB#5305323204669,pdf.exe	schtasks.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe
PID 1856 wrote to memory of 2028	1856	AWB#5305323204669,pdf.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\AWB#5305323204669,pdf.exe
"C:\Users\Admin\AppData\Local\Temp\AWB#5305323204669,pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1856

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\pgIKzElqxTk" /XML "C:\Users\Admin\AppData\Local\Temp\tmp94C2.tmp"
2⤵
- Creates scheduled task(s)
PID:1164

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
"{path}"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:2028

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp94C2.tmp
Filesize
1KB

MD5
0a872137dda6d82f31617b181d00c16d

SHA1
151db573298f3432bb0c027553b8ad850ee40f07

SHA256
35f76f380b68937a54670f8d92ba3c272bd3d70d6b3c948ecdfe1f5d90232357

SHA512
056376c10dbe981ef1056fec43ace839ff61fe57efe3938d9d321cf2b7bb6e98ad3189effac1cc4710586539eedc956be3dd0afd72175c7193d9adde82f0e3aa

Download Submit
memory/1164-58-0x0000000000000000-mapping.dmp

Download
memory/1856-54-0x00000000012F0000-0x0000000001330000-memory.dmp

Filesize
256KB

Download
memory/1856-55-0x0000000075CE1000-0x0000000075CE3000-memory.dmp

Filesize
8KB

Download
memory/1856-56-0x00000000004B0000-0x00000000004B8000-memory.dmp

Filesize
32KB

Download
memory/1856-57-0x0000000000B40000-0x0000000000B58000-memory.dmp

Filesize
96KB

Download
memory/2028-60-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2028-61-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2028-63-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2028-64-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2028-65-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2028-66-0x000000000040C73E-mapping.dmp

Download
memory/2028-68-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2028-70-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads