asyncrat | f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409

General

Target
f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
Size 45KB
Sample260531-le8jesdx71
SHA256 f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409
MD5 6eb62018427630ce53a402d4838dbf4a
SHA1 74d393c59babc9d5bba5403800afdf9f0591da92
SHA512 e902a43e8243e69b9e9d0af47108343ad1348b669317de96fb3341d35c17b690195cb2b06abf6185ab5c5e3bd682e6b0d6234dc7d6d77a8f3eecf3ac9d36006b
SSDEEP 768:wuD/ZTpw7bmaWUg3gSk0mo2qlTSAFcKoabbb4ZhM/RPIAEzjb+gX3iJZohoxIVtR:wuD/ZTpMZSB2YSAvQZh6OAE3bBXSIhjJ
TLSH
T12C231A003BE9C12BF2BF4FB899F26105867AF2732603D59E1CC4519B5613FC6DA426E9
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

phimxemsex.me:443
phimxemsex.me:80
phimxemsex.me:7797
phimxemsex.me:8707
phimxemsex.me:6620
www.phimxemsex.me:443
www.phimxemsex.me:80
www.phimxemsex.me:7797
www.phimxemsex.me:8707
www.phimxemsex.me:6620
dridex.phimxemsex.me:443
dridex.phimxemsex.me:80
dridex.phimxemsex.me:7797
dridex.phimxemsex.me:8707
dridex.phimxemsex.me:6620
locky.phimxemsex.me:443
locky.phimxemsex.me:80
locky.phimxemsex.me:7797
locky.phimxemsex.me:8707
locky.phimxemsex.me:6620
conficker.phimxemsex.me:443
conficker.phimxemsex.me:80
conficker.phimxemsex.me:7797
conficker.phimxemsex.me:8707
conficker.phimxemsex.me:6620
klez.phimxemsex.me:443
klez.phimxemsex.me:80
klez.phimxemsex.me:7797
klez.phimxemsex.me:8707
klez.phimxemsex.me:6620

Mutex

R0vIv8Id0CIG

Attributes

delay
0
install
true
install_file
avgxz.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/0x000300000002a213-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
3924	avgxz.exe
4976	avgxz.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	cmd.exe
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	avgxz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	avgxz.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3568	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
2120	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
Token: SeDebugPrivilege	3924	avgxz.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3672 wrote to memory of 704	3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe	82
PID 3672 wrote to memory of 2400	3672	f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe	84
PID 2400 wrote to memory of 3568	2400	cmd.exe	86
PID 704 wrote to memory of 2120	704	cmd.exe	87
PID 2400 wrote to memory of 4976	2400	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe
"C:\Users\Admin\AppData\Local\Temp\f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3672
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "avgxz" /tr '"C:\Users\Admin\AppData\Roaming\avgxz.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:704
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "avgxz" /tr '"C:\Users\Admin\AppData\Roaming\avgxz.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2120
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5E09.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2400
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3568
- - C:\Users\Admin\AppData\Roaming\avgxz.exe
    "C:\Users\Admin\AppData\Roaming\avgxz.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4976

C:\Users\Admin\AppData\Roaming\avgxz.exe
"C:\Users\Admin\AppData\Roaming\avgxz.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:3924

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

tmp5E09.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp5E09.tmp.bat
Size 149B
SHA256 943587ffb3eadf187187ebc935c719c2e47053c9ba0b50f529574cb4e488266c
MD5 e80d70669c57d7e8e700235f530c3928
SHA1 996cc064add0d1da4f0b43bd1f3e2d909bdb2790
SHA512 e0a5719eb7f70fb2334b108c6b711c13afe393cfbb3f7119c5b67b84ee905827d71d69798558245c43f280ce794c2388eccce5ffb033bd40ce935d8b6d46032f
TLSH
T1D7C02B4391C6EA5E3E05181302FADD8CA173BC5A3F48BB00C304961F53804C8F0DD342
MD5 SHA1 SHA512 TLSH

Submit Download

avgxz.exe

Path C:\Users\Admin\AppData\Roaming\avgxz.exe
Size 45KB
SHA256 f85a6720fff68e1f0b732cc0c4e504d10dddfa58c1fcc7c9f09dbc156f489409
MD5 6eb62018427630ce53a402d4838dbf4a
SHA1 74d393c59babc9d5bba5403800afdf9f0591da92
SHA512 e902a43e8243e69b9e9d0af47108343ad1348b669317de96fb3341d35c17b690195cb2b06abf6185ab5c5e3bd682e6b0d6234dc7d6d77a8f3eecf3ac9d36006b
SSDEEP 768:wuD/ZTpw7bmaWUg3gSk0mo2qlTSAFcKoabbb4ZhM/RPIAEzjb+gX3iJZohoxIVtR:wuD/ZTpMZSB2YSAvQZh6OAE3bBXSIhjJ
TLSH
T12C231A003BE9C12BF2BF4FB899F26105867AF2732603D59E1CC4519B5613FC6DA426E9
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/3672-0-0x00000000001D0000-0x00000000001E2000-memory.dmp

Download

memory/3672-1-0x0000000004BA0000-0x0000000004BB0000-memory.dmp

Download

memory/3672-2-0x0000000004C60000-0x0000000004CFC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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