asyncrat | d81b9779ced62d1f6e6af08d6694dda04aee3e667b8510d19190073af826b684

General

Target
tmps9493ulm.exe
Size 45KB
Sample260602-kwfpasht4w
SHA256 d81b9779ced62d1f6e6af08d6694dda04aee3e667b8510d19190073af826b684
MD5 acf3cdc65a871a7103b099cf124a456e
SHA1 9cf95de8e0bce15b807323560576dcd641caae6d
SHA512 3ad366bec17b7b1f2fa260f757ab29a58ae56ae6f25b659ab51b90ff3bed9393095065e8f49e1b2a4a061412139f43bbaae214b578ac55f0d72a544d75f8fdea
SSDEEP 768:Yu9QdTsw6PpWUBRxTmo2qtbzjHy/aKPIbRjbagX3ilEhxiFWgySD58BDZrx:Yu9QdTs9324nhbBbNXSk0VyG5adrx
TLSH
T107232B003BE8812BF2BE4F789DF26145857AF5633A03D68D1CC4519B5713BC68A52AFA
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

best-comic-books.com:443
best-comic-books.com:80
www.best-comic-books.com:443
www.best-comic-books.com:80
melissa.best-comic-books.com:443
melissa.best-comic-books.com:80
qbot.best-comic-books.com:443
qbot.best-comic-books.com:80

Mutex

lACHW04kzzoh

Attributes

delay
0
install
true
install_file
xj3di28.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
behavioral3/files/0x000300000002a216-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
2408	xj3di28.exe
1404	xj3di28.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	xj3di28.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xj3di28.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmps9493ulm.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
4596	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
4024	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe
2984	tmps9493ulm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2984	tmps9493ulm.exe
Token: SeDebugPrivilege	2408	xj3di28.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2984 wrote to memory of 2360	2984	tmps9493ulm.exe	82
PID 2984 wrote to memory of 2816	2984	tmps9493ulm.exe	84
PID 2816 wrote to memory of 4596	2816	cmd.exe	86
PID 2360 wrote to memory of 4024	2360	cmd.exe	87
PID 2816 wrote to memory of 1404	2816	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\tmps9493ulm.exe
"C:\Users\Admin\AppData\Local\Temp\tmps9493ulm.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2984
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "xj3di28" /tr '"C:\Users\Admin\AppData\Roaming\xj3di28.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2360
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "xj3di28" /tr '"C:\Users\Admin\AppData\Roaming\xj3di28.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4024
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp35A1.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2816
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4596
- - C:\Users\Admin\AppData\Roaming\xj3di28.exe
    "C:\Users\Admin\AppData\Roaming\xj3di28.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1404

C:\Users\Admin\AppData\Roaming\xj3di28.exe
"C:\Users\Admin\AppData\Roaming\xj3di28.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:2408

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

tmp35A1.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp35A1.tmp.bat
Size 151B
SHA256 f79eaf8e9130f9f7bfc1ba52a6d78abfc2a534cc0158d929453b80a752a31c9f
MD5 06265f4cfe70c696ec8dace5ad221e92
SHA1 3197b17ee39334168d266fa1a5ec7c06609fd1db
SHA512 4b0f12de0a362742cd9856680b0370e537ce6ed5b58e0848754d5aad9f56e2cc261787219672d6bd8402c7d846e7428b4e27c842f73bda3ffc303f112deb3f29
TLSH
T169C02B8351C5EA2E6C0514E312FAD5CCA172BC193F40BB00CB044C0D22C0C48F0DA382
MD5 SHA1 SHA512 TLSH

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xj3di28.exe

Path C:\Users\Admin\AppData\Roaming\xj3di28.exe
Size 45KB
SHA256 d81b9779ced62d1f6e6af08d6694dda04aee3e667b8510d19190073af826b684
MD5 acf3cdc65a871a7103b099cf124a456e
SHA1 9cf95de8e0bce15b807323560576dcd641caae6d
SHA512 3ad366bec17b7b1f2fa260f757ab29a58ae56ae6f25b659ab51b90ff3bed9393095065e8f49e1b2a4a061412139f43bbaae214b578ac55f0d72a544d75f8fdea
SSDEEP 768:Yu9QdTsw6PpWUBRxTmo2qtbzjHy/aKPIbRjbagX3ilEhxiFWgySD58BDZrx:Yu9QdTs9324nhbBbNXSk0VyG5adrx
TLSH
T107232B003BE8812BF2BE4F789DF26145857AF5633A03D68D1CC4519B5713BC68A52AFA
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2984-0-0x0000000000810000-0x0000000000822000-memory.dmp

Download

memory/2984-1-0x00000000053C0000-0x00000000053D0000-memory.dmp

Download

memory/2984-2-0x00000000052B0000-0x000000000534C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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