asyncrat | 219b31b9527c6ee529021a15017c007a54f94ea52d1f8bba9b983e9546491201

General

Target

Free Fn External (BETA).exe
Size

48KB
MD5

dc2161955d406b3c48415ac395e651f2
SHA1

2ee94a040ac5850a3c7f66dee931b7dfc05091a8
SHA256

219b31b9527c6ee529021a15017c007a54f94ea52d1f8bba9b983e9546491201
SHA512

0774ff2c110e80de0e2e70e1cbc85cf64c2345276156e69503298fe6a462017de8c0659c9e04db24e391379bb5b8a4404c53169bcd04e899f134027acd9302af
SSDEEP

768:SujY01TBEwp/WUT1y9mo2qzEL4g6lHPIRFwrd0bEHH1hdqAbTA4XWBDZ8E:Su801TBvo2p6qRFwr6bEn1h8gA4X4d8E

Score

10^/10

asyncrat getbeamed discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

GETBEAMED

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:4782

127.0.0.1:8808

127.0.0.1:40708

GETBEAMEDNIGGAXDD-40708.portmap.host:6606

GETBEAMEDNIGGAXDD-40708.portmap.host:7707

GETBEAMEDNIGGAXDD-40708.portmap.host:4782

GETBEAMEDNIGGAXDD-40708.portmap.host:8808

GETBEAMEDNIGGAXDD-40708.portmap.host:40708

Mutex

62pUxVOx2jfp

Attributes

delay
3
install
true
install_file
.net2.exe
install_folder
%Temp%

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/0x00250000000465f3-11.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-1-5-21-1411052346-3904498293-150013998-1000\Control Panel\International\Geo\Nation	Free Fn External (BETA).exe

Executes dropped EXE 1 IoCs

pid	Process
3008	.net2.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	Free Fn External (BETA).exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
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	.net2.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2884	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
2892	schtasks.exe

Suspicious behavior: EnumeratesProcesses 22 IoCs

pid	Process
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe
1760	Free Fn External (BETA).exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1760	Free Fn External (BETA).exe
Token: SeDebugPrivilege	3008	.net2.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1760 wrote to memory of 2708	1760	Free Fn External (BETA).exe	96
PID 1760 wrote to memory of 2708	1760	Free Fn External (BETA).exe	96
PID 1760 wrote to memory of 2708	1760	Free Fn External (BETA).exe	96
PID 1760 wrote to memory of 564	1760	Free Fn External (BETA).exe	98
PID 1760 wrote to memory of 564	1760	Free Fn External (BETA).exe	98
PID 1760 wrote to memory of 564	1760	Free Fn External (BETA).exe	98
PID 564 wrote to memory of 2884	564	cmd.exe	101
PID 564 wrote to memory of 2884	564	cmd.exe	101
PID 564 wrote to memory of 2884	564	cmd.exe	101
PID 2708 wrote to memory of 2892	2708	cmd.exe	102
PID 2708 wrote to memory of 2892	2708	cmd.exe	102
PID 2708 wrote to memory of 2892	2708	cmd.exe	102
PID 564 wrote to memory of 3008	564	cmd.exe	104
PID 564 wrote to memory of 3008	564	cmd.exe	104
PID 564 wrote to memory of 3008	564	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\Free Fn External (BETA).exe
"C:\Users\Admin\AppData\Local\Temp\Free Fn External (BETA).exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1760
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn ".net2" /tr '"C:\Users\Admin\AppData\Local\Temp\.net2.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2708
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn ".net2" /tr '"C:\Users\Admin\AppData\Local\Temp\.net2.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2892
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4B9A.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:564
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2884
- - C:\Users\Admin\AppData\Local\Temp\.net2.exe
    "C:\Users\Admin\AppData\Local\Temp\.net2.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3008

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --string-annotations=is-enterprise-managed=no --field-trial-handle=1328,i,418820165226066361,4591810059585231024,262144 --variations-seed-version --mojo-platform-channel-handle=2896 /prefetch:8
1⤵
PID:3304

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --string-annotations=is-enterprise-managed=no --field-trial-handle=4004,i,418820165226066361,4591810059585231024,262144 --variations-seed-version --mojo-platform-channel-handle=4228 /prefetch:8
1⤵
PID:2216

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\.net2.exe

Filesize
48KB

MD5
dc2161955d406b3c48415ac395e651f2

SHA1
2ee94a040ac5850a3c7f66dee931b7dfc05091a8

SHA256
219b31b9527c6ee529021a15017c007a54f94ea52d1f8bba9b983e9546491201

SHA512
0774ff2c110e80de0e2e70e1cbc85cf64c2345276156e69503298fe6a462017de8c0659c9e04db24e391379bb5b8a4404c53169bcd04e899f134027acd9302af

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp4B9A.tmp.bat

Filesize
152B

MD5
de4c52d6cfa9853b9bf7b31395e48581

SHA1
7894c20f7c55c0544f5fc473597cbae07ecdbbfd

SHA256
30767cebe5053de0b648877c01fb1c4e95f0095256ea1a189034adb348c4744d

SHA512
7a1d1a2b9d48ed94821cb0c712818c1abf79ac9b24778c74187349ed46e96baa43c3ebca49684d1ccec086a81a8101ca496d3b4b9ae6dfa60b1c8c3604de3c46

Download Submit
memory/1760-0-0x0000000074D6E000-0x0000000074D6F000-memory.dmp

Filesize
4KB

Download
memory/1760-1-0x00000000003F0000-0x0000000000402000-memory.dmp

Filesize
72KB

Download
memory/1760-2-0x0000000074D60000-0x0000000075511000-memory.dmp

Filesize
7.7MB

Download
memory/1760-3-0x0000000004DD0000-0x0000000004E6C000-memory.dmp

Filesize
624KB

Download
memory/1760-8-0x0000000074D60000-0x0000000075511000-memory.dmp

Filesize
7.7MB

Download
memory/3008-13-0x0000000074CB0000-0x0000000075461000-memory.dmp

Filesize
7.7MB

Download
memory/3008-14-0x0000000074CB0000-0x0000000075461000-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