asyncrat | 3baeef9096ffe907a5df5191cacaf937fd6033eccefe1d75bda27824ae974643

General

Target

bwejhfzdg.exe
Size

47KB
MD5

6370fe41da82c0517f932c86d67a5186
SHA1

44785ae42dbb4259bb14a14f8fa4454d42bc97e6
SHA256

3baeef9096ffe907a5df5191cacaf937fd6033eccefe1d75bda27824ae974643
SHA512

274078f74c489cce1723385ea9b34e3c27b99834ff93447bd5a71ab09feb03bdcd78b03655a446d8ef3e37ced1a13dd7a19b0a4166cf10695da148c00d968832
SSDEEP

768:kuo9dT1LxHaFzWUfbmBmo2qbOp0yJxiWfQ3PIyAd0b3wkJr63Ps6vMSUBDZcx:kuo9dT1LoG23pTiWfVyjb3wkJ63Ps6Uw

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

gba-all-twice-reputation.trycloudflare.com:6606

gba-all-twice-reputation.trycloudflare.com:7707

gba-all-twice-reputation.trycloudflare.com:8808

Mutex

PLYz880kniL1

Attributes

delay
3
install
true
install_file
roar.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x000200000001e747-11.dat	family_asyncrat

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	bwejhfzdg.exe

Executes dropped EXE 1 IoCs

pid	Process
1316	roar.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	roar.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bwejhfzdg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1292	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2276	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe
5016	bwejhfzdg.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5016	bwejhfzdg.exe
Token: SeDebugPrivilege	1316	roar.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 3548	5016	bwejhfzdg.exe	84
PID 5016 wrote to memory of 3548	5016	bwejhfzdg.exe	84
PID 5016 wrote to memory of 3548	5016	bwejhfzdg.exe	84
PID 5016 wrote to memory of 3684	5016	bwejhfzdg.exe	86
PID 5016 wrote to memory of 3684	5016	bwejhfzdg.exe	86
PID 5016 wrote to memory of 3684	5016	bwejhfzdg.exe	86
PID 3548 wrote to memory of 2276	3548	cmd.exe	88
PID 3548 wrote to memory of 2276	3548	cmd.exe	88
PID 3548 wrote to memory of 2276	3548	cmd.exe	88
PID 3684 wrote to memory of 1292	3684	cmd.exe	89
PID 3684 wrote to memory of 1292	3684	cmd.exe	89
PID 3684 wrote to memory of 1292	3684	cmd.exe	89
PID 3684 wrote to memory of 1316	3684	cmd.exe	96
PID 3684 wrote to memory of 1316	3684	cmd.exe	96
PID 3684 wrote to memory of 1316	3684	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\bwejhfzdg.exe
"C:\Users\Admin\AppData\Local\Temp\bwejhfzdg.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "roar" /tr '"C:\Users\Admin\AppData\Roaming\roar.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3548
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "roar" /tr '"C:\Users\Admin\AppData\Roaming\roar.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2276
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp87D6.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3684
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1292
- - C:\Users\Admin\AppData\Roaming\roar.exe
    "C:\Users\Admin\AppData\Roaming\roar.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1316

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp87D6.tmp.bat

Filesize
148B

MD5
25295f0b4604cdc9f0fb5db0a241bd1c

SHA1
9e09b0cb89d51ee24606ca194e709454cc961d46

SHA256
576649c55a7c4e81052dc3e0662ebab86ff661991b9ee0864060a12770ecb0a9

SHA512
fff5aca02464b748e9d7501a2d3124e4aa277341c73e1cf85c951b6b06bd7c292544884fc5a36ea844771ada3420d997be21be4a99cd7e1135b6e31844e30ee2

Download Submit
C:\Users\Admin\AppData\Roaming\roar.exe

Filesize
47KB

MD5
6370fe41da82c0517f932c86d67a5186

SHA1
44785ae42dbb4259bb14a14f8fa4454d42bc97e6

SHA256
3baeef9096ffe907a5df5191cacaf937fd6033eccefe1d75bda27824ae974643

SHA512
274078f74c489cce1723385ea9b34e3c27b99834ff93447bd5a71ab09feb03bdcd78b03655a446d8ef3e37ced1a13dd7a19b0a4166cf10695da148c00d968832

Download Submit
memory/1316-13-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/1316-14-0x0000000074520000-0x0000000074CD0000-memory.dmp

Filesize
7.7MB

Download
memory/5016-0-0x00000000745AE000-0x00000000745AF000-memory.dmp

Filesize
4KB

Download
memory/5016-1-0x0000000000810000-0x0000000000822000-memory.dmp

Filesize
72KB

Download
memory/5016-2-0x00000000745A0000-0x0000000074D50000-memory.dmp

Filesize
7.7MB

Download
memory/5016-3-0x0000000005130000-0x00000000051CC000-memory.dmp

Filesize
624KB

Download
memory/5016-8-0x00000000745A0000-0x0000000074D50000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads