asyncrat | 53e43388c51de2879429ef05b1ac8a636024f419a9f9d56d7afabf104db721aa

General

Target

tmp.exe
Size

47KB
MD5

711fbd6412e3030d4653a05883fcd498
SHA1

f1c2a454140c5e4df310643c6e5ee21e50373904
SHA256

53e43388c51de2879429ef05b1ac8a636024f419a9f9d56d7afabf104db721aa
SHA512

fe2de1c3c52b5afa5d11b27c3d7944b9cd6fcba6cfbc9404bd37e94b64f610906ed3ad75d04c7bbe2f235d87a8f9703aa6bebcd896f994e54eb70a0f2139294c
SSDEEP

768:yuiHNTdFHLBWUZiGrmo2qrKkb6uKEKqPICRPCC7RB80byrwG+a1ZlgVrZiBDZUx:yuiHNTdBR2tkcTCRPznbyrh+a1U5ZcdW

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

127.0.0.1:8888

127.0.0.1:53370

flingmodder-53370.portmap.io:6606

flingmodder-53370.portmap.io:7707

flingmodder-53370.portmap.io:8808

flingmodder-53370.portmap.io:8888

flingmodder-53370.portmap.io:53370

Mutex

Admin

Attributes

delay
3
install
true
install_file
Windows.exe
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
behavioral2/memory/4872-132-0x0000000000580000-0x0000000000592000-memory.dmp	asyncrat
C:\Users\Admin\AppData\Roaming\Windows.exe	asyncrat
C:\Users\Admin\AppData\Roaming\Windows.exe	asyncrat

Executes dropped EXE 1 IoCs

Processes:

Windows.exe

pid process

2200 Windows.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-1-5-21-4246620582-653642754-1174164128-1000\Control Panel\International\Geo\Nation tmp.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

4660 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4376 timeout.exe

pid	process
2200	Windows.exe

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

pid	process
4660	schtasks.exe

pid	process
4376	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

tmp.exe

pid	process
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe
4872	tmp.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

tmp.exeWindows.exe

description pid process

Token: SeDebugPrivilege 4872 tmp.exe
Token: SeDebugPrivilege 2200 Windows.exe
Token: SeDebugPrivilege 2200 Windows.exe

description	pid	process
Token: SeDebugPrivilege	4872	tmp.exe
Token: SeDebugPrivilege	2200	Windows.exe
Token: SeDebugPrivilege	2200	Windows.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

tmp.execmd.execmd.exe

description	pid	process	target process
PID 4872 wrote to memory of 756	4872	tmp.exe	cmd.exe
PID 4872 wrote to memory of 756	4872	tmp.exe	cmd.exe
PID 4872 wrote to memory of 756	4872	tmp.exe	cmd.exe
PID 4872 wrote to memory of 4664	4872	tmp.exe	cmd.exe
PID 4872 wrote to memory of 4664	4872	tmp.exe	cmd.exe
PID 4872 wrote to memory of 4664	4872	tmp.exe	cmd.exe
PID 756 wrote to memory of 4660	756	cmd.exe	schtasks.exe
PID 756 wrote to memory of 4660	756	cmd.exe	schtasks.exe
PID 756 wrote to memory of 4660	756	cmd.exe	schtasks.exe
PID 4664 wrote to memory of 4376	4664	cmd.exe	timeout.exe
PID 4664 wrote to memory of 4376	4664	cmd.exe	timeout.exe
PID 4664 wrote to memory of 4376	4664	cmd.exe	timeout.exe
PID 4664 wrote to memory of 2200	4664	cmd.exe	Windows.exe
PID 4664 wrote to memory of 2200	4664	cmd.exe	Windows.exe
PID 4664 wrote to memory of 2200	4664	cmd.exe	Windows.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:4872

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows" /tr '"C:\Users\Admin\AppData\Roaming\Windows.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:756

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Windows" /tr '"C:\Users\Admin\AppData\Roaming\Windows.exe"'
3⤵
- Creates scheduled task(s)
PID:4660

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp73BE.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:4664

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:4376

C:\Users\Admin\AppData\Roaming\Windows.exe
"C:\Users\Admin\AppData\Roaming\Windows.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2200

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp73BE.tmp.bat
Filesize
151B

MD5
bfae38535741ccdbd3bd86aaa92e7eb6

SHA1
8231391c27bb6b5b33114e61a7254fe04088c9e6

SHA256
594addc22dd1e943ba0d83c6cba4753eecba752a61cc5d4e7b24fc2f3c1f7581

SHA512
59029e3bf3d4e915ea122a16c7494bac025c04515a34c270f4abb478ac61edd25ffd480a297ee050776949b7ad1cddae53d47bee7228b9f6a5f7b164a69c6524

Download Submit
C:\Users\Admin\AppData\Roaming\Windows.exe
Filesize
47KB

MD5
711fbd6412e3030d4653a05883fcd498

SHA1
f1c2a454140c5e4df310643c6e5ee21e50373904

SHA256
53e43388c51de2879429ef05b1ac8a636024f419a9f9d56d7afabf104db721aa

SHA512
fe2de1c3c52b5afa5d11b27c3d7944b9cd6fcba6cfbc9404bd37e94b64f610906ed3ad75d04c7bbe2f235d87a8f9703aa6bebcd896f994e54eb70a0f2139294c

Download Submit
C:\Users\Admin\AppData\Roaming\Windows.exe
Filesize
47KB

MD5
711fbd6412e3030d4653a05883fcd498

SHA1
f1c2a454140c5e4df310643c6e5ee21e50373904

SHA256
53e43388c51de2879429ef05b1ac8a636024f419a9f9d56d7afabf104db721aa

SHA512
fe2de1c3c52b5afa5d11b27c3d7944b9cd6fcba6cfbc9404bd37e94b64f610906ed3ad75d04c7bbe2f235d87a8f9703aa6bebcd896f994e54eb70a0f2139294c

Download Submit
memory/756-135-0x0000000000000000-mapping.dmp

Download
memory/2200-140-0x0000000000000000-mapping.dmp

Download
memory/4376-139-0x0000000000000000-mapping.dmp

Download
memory/4660-138-0x0000000000000000-mapping.dmp

Download
memory/4664-136-0x0000000000000000-mapping.dmp

Download
memory/4872-132-0x0000000000580000-0x0000000000592000-memory.dmp

Filesize
72KB

Download
memory/4872-133-0x0000000005230000-0x0000000005296000-memory.dmp

Filesize
408KB

Download
memory/4872-134-0x0000000005670000-0x000000000570C000-memory.dmp

Filesize
624KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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