asyncrat | 2f9e7eff2a3dc88b9db2382875b0d3ad4241ac09e97e8d1d779a533a8fc1d8d1

General

Target

Microsoft_Service.exe
Size

63KB
MD5

1644c4839846a1b6524e38071528a564
SHA1

2250bbb322087bf0ba0a26a83b0e11ce5da6733d
SHA256

2f9e7eff2a3dc88b9db2382875b0d3ad4241ac09e97e8d1d779a533a8fc1d8d1
SHA512

06c28e8198d75aa5df58d678ae6145e388c5ee41f9f06b5de89e06fd821c91d5b4ef5cf3305493697eb870f0f9ab41b1e4b4de50301d0c3cf6a471de0c04eb98
SSDEEP

1536:VYQj1F212+iqsUbDh9xrsGu1SdpqKmY7:KKM1DhsUbD9HGz

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

45.139.198.242:6606

Attributes

delay
1
install
true
install_file
MicrosoftServices.exe
install_folder
%AppData%

aes.plain

Signatures

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/0x000f000000012015-15.dat	family_asyncrat

Executes dropped EXE 1 IoCs

pid	Process
2720	MicrosoftServices.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2088	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
2232	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2972	Microsoft_Service.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2972	Microsoft_Service.exe
Token: SeDebugPrivilege	2720	MicrosoftServices.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2972 wrote to memory of 2340	2972	Microsoft_Service.exe	29
PID 2972 wrote to memory of 2340	2972	Microsoft_Service.exe	29
PID 2972 wrote to memory of 2340	2972	Microsoft_Service.exe	29
PID 2972 wrote to memory of 2160	2972	Microsoft_Service.exe	31
PID 2972 wrote to memory of 2160	2972	Microsoft_Service.exe	31
PID 2972 wrote to memory of 2160	2972	Microsoft_Service.exe	31
PID 2340 wrote to memory of 2232	2340	cmd.exe	32
PID 2340 wrote to memory of 2232	2340	cmd.exe	32
PID 2340 wrote to memory of 2232	2340	cmd.exe	32
PID 2160 wrote to memory of 2088	2160	cmd.exe	34
PID 2160 wrote to memory of 2088	2160	cmd.exe	34
PID 2160 wrote to memory of 2088	2160	cmd.exe	34
PID 2160 wrote to memory of 2720	2160	cmd.exe	35
PID 2160 wrote to memory of 2720	2160	cmd.exe	35
PID 2160 wrote to memory of 2720	2160	cmd.exe	35

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Microsoft_Service.exe
"C:\Users\Admin\AppData\Local\Temp\Microsoft_Service.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2972
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftServices" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe"' & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2340
- - C:\Windows\system32\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "MicrosoftServices" /tr '"C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe"'
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2232
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp9656.tmp.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2160
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2088
- - C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe
    "C:\Users\Admin\AppData\Roaming\MicrosoftServices.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:2720

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

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabABBC.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9656.tmp.bat

Filesize
161B

MD5
259b429b37805cc7856ace46a48061e1

SHA1
04b1272614e6bf7906644d18dd1007ba2212381c

SHA256
43321eadb5ef6e92cc4189f6eb61af1541b7e0383ec84bc883e5e1f3b7d49ded

SHA512
dce1d88388f8b196a8375e61978269258e8a77e085a1939237d5a98a5e20669fafc20bdd90a600860d31f021af6503db9711e6bc8e1d4944fffa2f4b728ba095

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

Filesize
63KB

MD5
1644c4839846a1b6524e38071528a564

SHA1
2250bbb322087bf0ba0a26a83b0e11ce5da6733d

SHA256
2f9e7eff2a3dc88b9db2382875b0d3ad4241ac09e97e8d1d779a533a8fc1d8d1

SHA512
06c28e8198d75aa5df58d678ae6145e388c5ee41f9f06b5de89e06fd821c91d5b4ef5cf3305493697eb870f0f9ab41b1e4b4de50301d0c3cf6a471de0c04eb98

Download Submit
memory/2720-17-0x0000000000B10000-0x0000000000B26000-memory.dmp

Filesize
88KB

Download
memory/2972-0-0x000007FEF5813000-0x000007FEF5814000-memory.dmp

Filesize
4KB

Download
memory/2972-1-0x00000000008C0000-0x00000000008D6000-memory.dmp

Filesize
88KB

Download
memory/2972-2-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2972-3-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download
memory/2972-13-0x000007FEF5810000-0x000007FEF61FC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads