asyncrat | 39ae1a73d9326d866c0ea79742243790ed3aeeceac161f1a23f7b0c7b84b4570

General

Target

tmp.exe
Size

47KB
MD5

6d717fe6e6123691c7d9ffee92625c2f
SHA1

ac8e4b99c2398a48884805255f2fa90daf0dff3c
SHA256

39ae1a73d9326d866c0ea79742243790ed3aeeceac161f1a23f7b0c7b84b4570
SHA512

2b1d1ef8cc59b9916ccea5712609117d99576d59d3376bfe187eca473f988c0c76bc16dfff75d0e936af769963e13135f2f5f45ae7d4b62c619ffb88d20afdf8
SSDEEP

768:R/IO5VILWCyh+DiWtelDSN+iV08YbygejovEgK/J/ZVc6KN:R/PNWtKDs4zb1BnkJ/ZVclN

Score

10^/10

asyncrat redline default test discovery infostealer rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

193.233.48.17:8848

Mutex

dfas9asdf8as8z

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Extracted

Family

redline

Botnet

test

C2

193.233.48.17:9832

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat
RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline

RedLine payload 3 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\build.exe	family_redline
C:\Users\Admin\AppData\Local\Temp\build.exe	family_redline
behavioral2/memory/1484-145-0x00000000004A0000-0x00000000004BE000-memory.dmp	family_redline

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/2220-132-0x0000000000B20000-0x0000000000B32000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

Processes:

build.exe

pid process

1484 build.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:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation tmp.exe
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
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 5 IoCs

Processes:

powershell.exetmp.exebuild.exe

pid process

4240 powershell.exe
4240 powershell.exe
2220 tmp.exe
1484 build.exe
1484 build.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

tmp.exepowershell.exebuild.exe

description pid process

Token: SeDebugPrivilege 2220 tmp.exe
Token: SeDebugPrivilege 4240 powershell.exe
Token: SeDebugPrivilege 1484 build.exe

pid	process
1484	build.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	tmp.exe

pid	process
4240	powershell.exe
4240	powershell.exe
2220	tmp.exe
1484	build.exe
1484	build.exe

description	pid	process
Token: SeDebugPrivilege	2220	tmp.exe
Token: SeDebugPrivilege	4240	powershell.exe
Token: SeDebugPrivilege	1484	build.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

tmp.execmd.exepowershell.exe

description	pid	process	target process
PID 2220 wrote to memory of 3584	2220	tmp.exe	cmd.exe
PID 2220 wrote to memory of 3584	2220	tmp.exe	cmd.exe
PID 3584 wrote to memory of 4240	3584	cmd.exe	powershell.exe
PID 3584 wrote to memory of 4240	3584	cmd.exe	powershell.exe
PID 4240 wrote to memory of 1484	4240	powershell.exe	build.exe
PID 4240 wrote to memory of 1484	4240	powershell.exe	build.exe
PID 4240 wrote to memory of 1484	4240	powershell.exe	build.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2220

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\build.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:3584

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\build.exe"'
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4240

C:\Users\Admin\AppData\Local\Temp\build.exe
"C:\Users\Admin\AppData\Local\Temp\build.exe"
4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1484

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\build.exe
Filesize
95KB

MD5
37ccecb56eb0d2db0a5159b5bbc3ec5b

SHA1
7ba3a1ef06bbd6b1444337ff58736aeeec6d4164

SHA256
8dfbcef9c1dfe6a9bbc7d3a97ba8ac8928e6b4abc83bbd49e67a33c061a119cc

SHA512
8f93b9dce515b51cfb61fbc21881a83d8623a30849195299759edc9c8c2f3898562d5f461bc15b22c1abc7a9b3ab430a9bfdd7d610cf24d842ce28d672c77354

Download Submit
C:\Users\Admin\AppData\Local\Temp\build.exe
Filesize
95KB

MD5
37ccecb56eb0d2db0a5159b5bbc3ec5b

SHA1
7ba3a1ef06bbd6b1444337ff58736aeeec6d4164

SHA256
8dfbcef9c1dfe6a9bbc7d3a97ba8ac8928e6b4abc83bbd49e67a33c061a119cc

SHA512
8f93b9dce515b51cfb61fbc21881a83d8623a30849195299759edc9c8c2f3898562d5f461bc15b22c1abc7a9b3ab430a9bfdd7d610cf24d842ce28d672c77354

Download Submit
memory/1484-147-0x0000000004E20000-0x0000000004E32000-memory.dmp

Filesize
72KB

Download
memory/1484-153-0x0000000006760000-0x00000000067F2000-memory.dmp

Filesize
584KB

Download
memory/1484-152-0x0000000007770000-0x0000000007D14000-memory.dmp

Filesize
5.6MB

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memory/1484-151-0x0000000006C90000-0x00000000071BC000-memory.dmp

Filesize
5.2MB

Download
memory/1484-150-0x0000000006590000-0x0000000006752000-memory.dmp

Filesize
1.8MB

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memory/1484-156-0x0000000006C30000-0x0000000006C4E000-memory.dmp

Filesize
120KB

Download
memory/1484-155-0x0000000006A20000-0x0000000006A96000-memory.dmp

Filesize
472KB

Download
memory/1484-149-0x0000000005130000-0x000000000523A000-memory.dmp

Filesize
1.0MB

Download
memory/1484-142-0x0000000000000000-mapping.dmp

Download
memory/1484-148-0x0000000004E80000-0x0000000004EBC000-memory.dmp

Filesize
240KB

Download
memory/1484-154-0x0000000006800000-0x0000000006866000-memory.dmp

Filesize
408KB

Download
memory/1484-145-0x00000000004A0000-0x00000000004BE000-memory.dmp

Filesize
120KB

Download
memory/1484-146-0x00000000055A0000-0x0000000005BB8000-memory.dmp

Filesize
6.1MB

Download
memory/2220-135-0x000000001D220000-0x000000001D296000-memory.dmp

Filesize
472KB

Download
memory/2220-133-0x00007FF905BB0000-0x00007FF906671000-memory.dmp

Filesize
10.8MB

Download
memory/2220-134-0x00007FF905BB0000-0x00007FF906671000-memory.dmp

Filesize
10.8MB

Download
memory/2220-132-0x0000000000B20000-0x0000000000B32000-memory.dmp

Filesize
72KB

Download
memory/2220-136-0x00000000014E0000-0x00000000014FE000-memory.dmp

Filesize
120KB

Download
memory/3584-137-0x0000000000000000-mapping.dmp

Download
memory/4240-138-0x0000000000000000-mapping.dmp

Download
memory/4240-144-0x00007FF905BB0000-0x00007FF906671000-memory.dmp

Filesize
10.8MB

Download
memory/4240-140-0x00007FF905BB0000-0x00007FF906671000-memory.dmp

Filesize
10.8MB

Download
memory/4240-139-0x00000205F4940000-0x00000205F4962000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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