asyncrat | 685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38

General

Target
685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
Size 45KB
Sample260804-vdf78adh25
SHA256 685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38
MD5 65549c8201937e935e1f47103c00c033
SHA1 19a32e24b08a76b8887476d5d711b0b068e4683c
SHA512 dd6c51c250cde46cc678e708ba1c700ab8903b67ea10282205377435a5b437ae6835e635e8ac769a2a20f83e5912479f72c5e5f0692c7fcafbe6f07c64d25f59
SSDEEP 768:suJdpTP3tcsWUODmqmo2qV5pzbU38aPIQzgbbgX3isfEPTBgx93vnbwBDZkx:suJdpTPdI2kZxQ8bkXSsuBqlvCdkx
TLSH
T10F232A003BE8823BF2BE4F78ACF26145467AF6637603D6492CC4519B5623BC6D6426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

fimsexvietnam.com:80
fimsexvietnam.com:22
fimsexvietnam.com:8080
fimsexvietnam.com:8880
fimsexvietnam.com:2052
fimsexvietnam.com:2082
fimsexvietnam.com:2086
fimsexvietnam.com:2095
fimsexvietnam.com:443
fimsexvietnam.com:2053
fimsexvietnam.com:2083
fimsexvietnam.com:2087
fimsexvietnam.com:2096
fimsexvietnam.com:8443
www.fimsexvietnam.com:80
www.fimsexvietnam.com:22
www.fimsexvietnam.com:8080
www.fimsexvietnam.com:8880
www.fimsexvietnam.com:2052
www.fimsexvietnam.com:2082
www.fimsexvietnam.com:2086
www.fimsexvietnam.com:2095
www.fimsexvietnam.com:443
www.fimsexvietnam.com:2053
www.fimsexvietnam.com:2083
www.fimsexvietnam.com:2087
www.fimsexvietnam.com:2096
www.fimsexvietnam.com:8443
codered.fimsexvietnam.com:80
codered.fimsexvietnam.com:22
codered.fimsexvietnam.com:8080
codered.fimsexvietnam.com:8880
codered.fimsexvietnam.com:2052
codered.fimsexvietnam.com:2082
codered.fimsexvietnam.com:2086
codered.fimsexvietnam.com:2095
codered.fimsexvietnam.com:443
codered.fimsexvietnam.com:2053
codered.fimsexvietnam.com:2083
codered.fimsexvietnam.com:2087
codered.fimsexvietnam.com:2096
codered.fimsexvietnam.com:8443
formbook.fimsexvietnam.com:80
formbook.fimsexvietnam.com:22
formbook.fimsexvietnam.com:8080
formbook.fimsexvietnam.com:8880
formbook.fimsexvietnam.com:2052
formbook.fimsexvietnam.com:2082
formbook.fimsexvietnam.com:2086
formbook.fimsexvietnam.com:2095
formbook.fimsexvietnam.com:443
formbook.fimsexvietnam.com:2053
formbook.fimsexvietnam.com:2083
formbook.fimsexvietnam.com:2087
formbook.fimsexvietnam.com:2096
formbook.fimsexvietnam.com:8443

Mutex

36puGMgEdlM7

Attributes

delay
0
install
true
install_file
00x72gle.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/files/0x0008000000024552-8.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-1-5-21-668679576-120646659-2289335452-1000\Control Panel\International\Geo\Nation	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe

Executes dropped EXE 2 IoCs

pid	Process
1748	00x72gle.exe
4712	00x72gle.exe

Outbound SSH connection to public host 2 TTPs 4 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc	pid	Process
SSH destination	13	172.67.182.173:22	1748	00x72gle.exe
SSH destination	19	104.21.36.7:22	1748	00x72gle.exe
SSH destination	36	172.67.182.173:22	1748	00x72gle.exe
SSH destination	43	104.21.36.7:22	1748	00x72gle.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
3720	cmd.exe
1564	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 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	00x72gle.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	00x72gle.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1928	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
740	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
Token: SeDebugPrivilege	1748	00x72gle.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 3720	1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe	86
PID 1852 wrote to memory of 1564	1852	685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe	88
PID 1564 wrote to memory of 1928	1564	cmd.exe	90
PID 3720 wrote to memory of 740	3720	cmd.exe	91
PID 1564 wrote to memory of 4712	1564	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe
"C:\Users\Admin\AppData\Local\Temp\685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1852
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "00x72gle" /tr '"C:\Users\Admin\AppData\Roaming\00x72gle.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3720
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "00x72gle" /tr '"C:\Users\Admin\AppData\Roaming\00x72gle.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:740
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1400.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1564
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1928
- - C:\Users\Admin\AppData\Roaming\00x72gle.exe
    "C:\Users\Admin\AppData\Roaming\00x72gle.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4712

C:\Users\Admin\AppData\Roaming\00x72gle.exe
"C:\Users\Admin\AppData\Roaming\00x72gle.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1748

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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tmp1400.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1400.tmp.bat
Size 152B
SHA256 f34bc57320a7a51ec682c3f12fcd765f79452a0297a122e0a9b414cb1fe04ad9
MD5 547798b8736c017499a604592e5ce15f
SHA1 00a12734da0ac56ddb08e699254e17ea6d3d52b0
SHA512 36973e136b26fcc73ac575a46dab5001db26ceb94ffe9d177936f3f594fec32686217caa10de22be00a5cf110aee469e1f25e4165cc6a7826b21b2d9b508c492
TLSH
T18EC08C8261C5AA0E2909141306BA958C92B2A9193E88BB108308842A5280848E0AD346
MD5 SHA1 SHA512 TLSH

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00x72gle.exe

Path C:\Users\Admin\AppData\Roaming\00x72gle.exe
Size 45KB
SHA256 685553390676911f83f65300c708dfe67e96e0d1df619a3a4bce30b8472b7b38
MD5 65549c8201937e935e1f47103c00c033
SHA1 19a32e24b08a76b8887476d5d711b0b068e4683c
SHA512 dd6c51c250cde46cc678e708ba1c700ab8903b67ea10282205377435a5b437ae6835e635e8ac769a2a20f83e5912479f72c5e5f0692c7fcafbe6f07c64d25f59
SSDEEP 768:suJdpTP3tcsWUODmqmo2qV5pzbU38aPIQzgbbgX3isfEPTBgx93vnbwBDZkx:suJdpTPdI2kZxQ8bkXSsuBqlvCdkx
TLSH
T10F232A003BE8823BF2BE4F78ACF26145467AF6637603D6492CC4519B5623BC6D6426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1748-10-0x0000000004EE0000-0x0000000004EF0000-memory.dmp

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memory/1748-13-0x0000000004EE0000-0x0000000004EF0000-memory.dmp

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memory/1852-0-0x0000000000530000-0x0000000000542000-memory.dmp

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memory/1852-1-0x0000000004F00000-0x0000000004F10000-memory.dmp

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memory/1852-2-0x0000000004F10000-0x0000000004FAC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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