asyncrat | 71ad0a40822aa8637e09f788efb4b8c11a151497f624947af9da9cb03bd8bbd8

General

Target

Syncing.exe
Size

48KB
MD5

6cf60ceb94a75a9fd3ef42ef53cecd12
SHA1

21e27216f1cbc2f707e922e0238a21aecae5b0fd
SHA256

71ad0a40822aa8637e09f788efb4b8c11a151497f624947af9da9cb03bd8bbd8
SHA512

9a2c23a7bcd6df0e44ccd1b4f43c9ff64640143974ff00381979f80101270c66b386c55709f4392638e51abef47debd40e1605e78b213bef0ba59b4d49b22236
SSDEEP

768:qu6XdTvER+SWUk6P4mo2qbUiZtX1uSK7PIk+BeNJN6U0br+UZToANniLlU09kDTU:qu6XdTv2S2K1yEk+yJCbr+mBipU09Wd0

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

185.223.30.86:8808

Mutex

GfuQDRCNZd5L

Attributes

delay
9
install
true
install_file
sync.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
behavioral2/files/0x0007000000023cb9-13.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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	Syncing.exe

Executes dropped EXE 1 IoCs

pid	Process
3048	sync.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sync.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Syncing.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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

evasion

pid	Process
3172	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
1912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe
3440	Syncing.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3440	Syncing.exe
Token: SeDebugPrivilege	3048	sync.exe
Token: SeDebugPrivilege	3048	sync.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3440 wrote to memory of 1148	3440	Syncing.exe	88
PID 3440 wrote to memory of 1148	3440	Syncing.exe	88
PID 3440 wrote to memory of 1148	3440	Syncing.exe	88
PID 3440 wrote to memory of 4080	3440	Syncing.exe	90
PID 3440 wrote to memory of 4080	3440	Syncing.exe	90
PID 3440 wrote to memory of 4080	3440	Syncing.exe	90
PID 1148 wrote to memory of 1912	1148	cmd.exe	92
PID 1148 wrote to memory of 1912	1148	cmd.exe	92
PID 1148 wrote to memory of 1912	1148	cmd.exe	92
PID 4080 wrote to memory of 3172	4080	cmd.exe	93
PID 4080 wrote to memory of 3172	4080	cmd.exe	93
PID 4080 wrote to memory of 3172	4080	cmd.exe	93
PID 4080 wrote to memory of 3048	4080	cmd.exe	95
PID 4080 wrote to memory of 3048	4080	cmd.exe	95
PID 4080 wrote to memory of 3048	4080	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\Syncing.exe
"C:\Users\Admin\AppData\Local\Temp\Syncing.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3440
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "sync" /tr '"C:\Users\Admin\AppData\Roaming\sync.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1148
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "sync" /tr '"C:\Users\Admin\AppData\Roaming\sync.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1912
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBA67.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4080
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3172
- - C:\Users\Admin\AppData\Roaming\sync.exe
    "C:\Users\Admin\AppData\Roaming\sync.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:3048

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\tmpBA67.tmp.bat

Filesize
148B

MD5
cb3a6de36298d000f727ee7bd568b9e6

SHA1
75a19d0a0bd9ecc67bfb07388b2d44e3aacf27a4

SHA256
53eb65859fe0d71ff31b3d54344f4b86278500c5c9e9b9d337ef7fc7e9794ee8

SHA512
60787e49004c37befceb378a12014d255c26a0ad3285950984fd64852ea3fe73ac31aa32935383194931ec1ae850e782d049f95ebfb0fb4fba85467d53a2a1af

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

Filesize
48KB

MD5
6cf60ceb94a75a9fd3ef42ef53cecd12

SHA1
21e27216f1cbc2f707e922e0238a21aecae5b0fd

SHA256
71ad0a40822aa8637e09f788efb4b8c11a151497f624947af9da9cb03bd8bbd8

SHA512
9a2c23a7bcd6df0e44ccd1b4f43c9ff64640143974ff00381979f80101270c66b386c55709f4392638e51abef47debd40e1605e78b213bef0ba59b4d49b22236

Download Submit
memory/3048-15-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3048-16-0x0000000075220000-0x00000000759D0000-memory.dmp

Filesize
7.7MB

Download
memory/3440-0-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/3440-1-0x0000000000CC0000-0x0000000000CD2000-memory.dmp

Filesize
72KB

Download
memory/3440-2-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/3440-3-0x00000000752C0000-0x0000000075A70000-memory.dmp

Filesize
7.7MB

Download
memory/3440-4-0x0000000005530000-0x0000000005596000-memory.dmp

Filesize
408KB

Download
memory/3440-5-0x00000000059C0000-0x0000000005A5C000-memory.dmp

Filesize
624KB

Download
memory/3440-10-0x00000000752C0000-0x0000000075A70000-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