asyncrat | 735034c25663f558ff44d90634fd4de59d8787ea0955af4be3cfbbc531f924ad

General

Target
tmpc44pd862.exe
Size 45KB
Sample260522-x84ccaf18x
SHA256 735034c25663f558ff44d90634fd4de59d8787ea0955af4be3cfbbc531f924ad
MD5 d36720ca0d96c7b4d3eccfe26d728dcc
SHA1 abe4441a8b107b522865c8754fe0368bba0968f2
SHA512 5419620dfea3a4c93d9f392a3705ccd11adcfe20d47a527867c4169194cd032ac372eb664c149001ec545e8b07415cf60a06e77e58d21e1005d7143a05633f12
SSDEEP 768:cuRxJTPUYkEWUmjWymo2q1f0eUNEARViZPI6zjbigZ3iGhnuDJQKBDZUx:cuRxJTPjY2mUe+iW63bFZSGhnU/dUx
TLSH
T1F5234C003BE9812BF2BE4F78A9F26145867AF2672603D54A1CC451DB4723FC68A436FD
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

cocodemarsw.com:443
cocodemarsw.com:80
cocodemarsw.com:7797
cocodemarsw.com:8707
cocodemarsw.com:6620
www.cocodemarsw.com:443
www.cocodemarsw.com:80
www.cocodemarsw.com:7797
www.cocodemarsw.com:8707
www.cocodemarsw.com:6620
hack.cocodemarsw.com:443
hack.cocodemarsw.com:80
hack.cocodemarsw.com:7797
hack.cocodemarsw.com:8707
hack.cocodemarsw.com:6620
hermeticwiper.cocodemarsw.com:443
hermeticwiper.cocodemarsw.com:80
hermeticwiper.cocodemarsw.com:7797
hermeticwiper.cocodemarsw.com:8707
hermeticwiper.cocodemarsw.com:6620
ursnif.cocodemarsw.com:443
ursnif.cocodemarsw.com:80
ursnif.cocodemarsw.com:7797
ursnif.cocodemarsw.com:8707
ursnif.cocodemarsw.com:6620
sodinokibi.cocodemarsw.com:443
sodinokibi.cocodemarsw.com:80
sodinokibi.cocodemarsw.com:7797
sodinokibi.cocodemarsw.com:8707
sodinokibi.cocodemarsw.com:6620

Mutex

mZ4evxSpzNA4

Attributes

delay
0
install
true
install_file
m66i.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/0x0006000000025f55-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3024	m66i.exe
3492	m66i.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	tmpc44pd862.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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	m66i.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	m66i.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4552	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
484	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe
2164	tmpc44pd862.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2164	tmpc44pd862.exe
Token: SeDebugPrivilege	3024	m66i.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2164 wrote to memory of 3780	2164	tmpc44pd862.exe	80
PID 2164 wrote to memory of 6036	2164	tmpc44pd862.exe	82
PID 3780 wrote to memory of 484	3780	cmd.exe	84
PID 6036 wrote to memory of 4552	6036	cmd.exe	85
PID 6036 wrote to memory of 3492	6036	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\tmpc44pd862.exe
"C:\Users\Admin\AppData\Local\Temp\tmpc44pd862.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2164
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "m66i" /tr '"C:\Users\Admin\AppData\Roaming\m66i.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3780
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "m66i" /tr '"C:\Users\Admin\AppData\Roaming\m66i.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:484
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC93B.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:6036
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4552
- - C:\Users\Admin\AppData\Roaming\m66i.exe
    "C:\Users\Admin\AppData\Roaming\m66i.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3492

C:\Users\Admin\AppData\Roaming\m66i.exe
"C:\Users\Admin\AppData\Roaming\m66i.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3024

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

tmpC93B.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmpC93B.tmp.bat
Size 148B
SHA256 bfb757f8452ee4e39baf0e3cfa9260b7dec430daf3fdd115ffc9fe6c1763f034
MD5 dbab79d0d8d2bfe83d06e4ceb6583089
SHA1 107bdfb7c62ef5349466418c913e103923f3a6db
SHA512 b4dc8015909faa3af3d66880448f6b86f31965b6512aad8049b9ba31a3297444f65fb7bbfe817fa88297dff7e6be6eac38883840b51277f00c2c0b3db627ff6b
TLSH
T1D7C02B8391C9EA8E6905141312FAD48DF1736C1D3FC0FF00C784401D1681848F0D9345
MD5 SHA1 SHA512 TLSH

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m66i.exe

Path C:\Users\Admin\AppData\Roaming\m66i.exe
Size 45KB
SHA256 735034c25663f558ff44d90634fd4de59d8787ea0955af4be3cfbbc531f924ad
MD5 d36720ca0d96c7b4d3eccfe26d728dcc
SHA1 abe4441a8b107b522865c8754fe0368bba0968f2
SHA512 5419620dfea3a4c93d9f392a3705ccd11adcfe20d47a527867c4169194cd032ac372eb664c149001ec545e8b07415cf60a06e77e58d21e1005d7143a05633f12
SSDEEP 768:cuRxJTPUYkEWUmjWymo2q1f0eUNEARViZPI6zjbigZ3iGhnuDJQKBDZUx:cuRxJTPjY2mUe+iW63bFZSGhnU/dUx
TLSH
T1F5234C003BE9812BF2BE4F78A9F26145867AF2672603D54A1CC451DB4723FC68A436FD
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2164-0-0x00000000009E0000-0x00000000009F2000-memory.dmp

Download

memory/2164-1-0x0000000005430000-0x0000000005440000-memory.dmp

Download

memory/2164-2-0x00000000054E0000-0x000000000557C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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