asyncrat | 31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb

General

Target
31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
Size 45KB
Sample260601-nynpgacv5j
SHA256 31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb
MD5 2717421fba7d603a703b21e54974e4e6
SHA1 ce80c8e239e4271772ce512fa0f3b2d5e0c60cf2
SHA512 8425cc2a43ee2c5b3a9d00c7f966b3d891dbb304e9313941e45bd5fcdb744ab6f7061c9af44e2c966c54a227f8682ac8253f4c75cc7a766ff1d0ea133464a8b4
SSDEEP 768:4uLoZTUAoOSWUYZL8mo2qFrfBohEa+PIvBjbmgX3igFJwMYL8gEoBDZbx:4uLoZTUTn2a4EaHvRb5XSgTwNp9dbx
TLSH
T1C3232B003BE8812BF2BE4F78ADF26145467EF6A32603D58E1C84519B5713FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

phimsexviet.co.uk:443
phimsexviet.co.uk:80
phimsexviet.co.uk:7797
phimsexviet.co.uk:8707
phimsexviet.co.uk:6620
www.phimsexviet.co.uk:443
www.phimsexviet.co.uk:80
www.phimsexviet.co.uk:7797
www.phimsexviet.co.uk:8707
www.phimsexviet.co.uk:6620
hermeticwiper.phimsexviet.co.uk:443
hermeticwiper.phimsexviet.co.uk:80
hermeticwiper.phimsexviet.co.uk:7797
hermeticwiper.phimsexviet.co.uk:8707
hermeticwiper.phimsexviet.co.uk:6620
gootloader.phimsexviet.co.uk:443
gootloader.phimsexviet.co.uk:80
gootloader.phimsexviet.co.uk:7797
gootloader.phimsexviet.co.uk:8707
gootloader.phimsexviet.co.uk:6620

Mutex

UznmznDixkBC

Attributes

delay
0
install
true
install_file
ie7c6.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
behavioral2/files/0x001a00000002b624-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3160	ie7c6.exe
2068	ie7c6.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 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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ie7c6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ie7c6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
5040	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
2748	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
Token: SeDebugPrivilege	3160	ie7c6.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 6088	4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe	81
PID 4300 wrote to memory of 2652	4300	31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe	82
PID 2652 wrote to memory of 5040	2652	cmd.exe	85
PID 6088 wrote to memory of 2748	6088	cmd.exe	86
PID 2652 wrote to memory of 2068	2652	cmd.exe	89

C:\Users\Admin\AppData\Local\Temp\31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe
"C:\Users\Admin\AppData\Local\Temp\31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4300
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ie7c6" /tr '"C:\Users\Admin\AppData\Roaming\ie7c6.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6088
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ie7c6" /tr '"C:\Users\Admin\AppData\Roaming\ie7c6.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2748
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1FB8.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2652
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5040
- - C:\Users\Admin\AppData\Roaming\ie7c6.exe
    "C:\Users\Admin\AppData\Roaming\ie7c6.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2068

C:\Users\Admin\AppData\Roaming\ie7c6.exe
"C:\Users\Admin\AppData\Roaming\ie7c6.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3160

Network

MITRE ATT&CK Enterprise v16

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

System Information Discovery

1

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

tmp1FB8.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1FB8.tmp.bat
Size 149B
SHA256 24ca26a2291ed8fbe6d7d8871743d40025b59e09bfae6345303fa451029a1c25
MD5 7f791495172728e98b82258d256405a5
SHA1 cdfacb40f52c83bafda2ad2ec49417143ad741e3
SHA512 72253316cb0a7a9071149c6bf088fe30b33526a3a38593083f8e7a18382c61bbe527f8b4dff4ed734a8ea1dcb5b878acc1ffdcda338c5275ca85abe07ba170f9
TLSH
T102C02B42A1C5EE8E284A181302FED48C91B36C9D3F40BB10D304A00D2280848F0D9349
MD5 SHA1 SHA512 TLSH

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ie7c6.exe

Path C:\Users\Admin\AppData\Roaming\ie7c6.exe
Size 45KB
SHA256 31c22c43ff4604728431bf4adfdbc57ae16efb2cdc43e03c9f4e77624a1a5dcb
MD5 2717421fba7d603a703b21e54974e4e6
SHA1 ce80c8e239e4271772ce512fa0f3b2d5e0c60cf2
SHA512 8425cc2a43ee2c5b3a9d00c7f966b3d891dbb304e9313941e45bd5fcdb744ab6f7061c9af44e2c966c54a227f8682ac8253f4c75cc7a766ff1d0ea133464a8b4
SSDEEP 768:4uLoZTUAoOSWUYZL8mo2qFrfBohEa+PIvBjbmgX3igFJwMYL8gEoBDZbx:4uLoZTUTn2a4EaHvRb5XSgTwNp9dbx
TLSH
T1C3232B003BE8812BF2BE4F78ADF26145467EF6A32603D58E1C84519B5713FC69A426FD
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/4300-0-0x00000000007B0000-0x00000000007C2000-memory.dmp

Download

memory/4300-1-0x00000000050E0000-0x00000000050F0000-memory.dmp

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memory/4300-2-0x0000000005190000-0x000000000522C000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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