asyncrat | e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd

General

Target
e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
Size 45KB
Sample260803-xtltraed83
SHA256 e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd
MD5 cf5b3762daee5a16161b6109e1bd04f0
SHA1 720f2ca2f68f61aec67748602f82dc810f020ac3
SHA512 4ca844e0e6825ed83dcd75ba509bec738cc388847b5c36e63e8fe42fcbdafb250364d82e6565530ab8ac09cb0460dd1a629a64808837d7f66ff8c1f1c22a1933
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlLlsHoPEaMPIGLjbwgX3iS3azV3qFMm7W8XtHBDo:wuDWZTpMZSB2OuuEaxGfb3XSS3E91m7g
TLSH
T1C5231A003BE8822BF2BE4F789DF26245467EF5732603D5491CC4519B5713FC69A42AFA
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

vnsextop1.com:80
vnsextop1.com:22
vnsextop1.com:8080
vnsextop1.com:8880
vnsextop1.com:2052
vnsextop1.com:2082
vnsextop1.com:2086
vnsextop1.com:2095
vnsextop1.com:443
vnsextop1.com:2053
vnsextop1.com:2083
vnsextop1.com:2087
vnsextop1.com:2096
vnsextop1.com:8443
www.vnsextop1.com:80
www.vnsextop1.com:22
www.vnsextop1.com:8080
www.vnsextop1.com:8880
www.vnsextop1.com:2052
www.vnsextop1.com:2082
www.vnsextop1.com:2086
www.vnsextop1.com:2095
www.vnsextop1.com:443
www.vnsextop1.com:2053
www.vnsextop1.com:2083
www.vnsextop1.com:2087
www.vnsextop1.com:2096
www.vnsextop1.com:8443
emotet.vnsextop1.com:80
emotet.vnsextop1.com:22
emotet.vnsextop1.com:8080
emotet.vnsextop1.com:8880
emotet.vnsextop1.com:2052
emotet.vnsextop1.com:2082
emotet.vnsextop1.com:2086
emotet.vnsextop1.com:2095
emotet.vnsextop1.com:443
emotet.vnsextop1.com:2053
emotet.vnsextop1.com:2083
emotet.vnsextop1.com:2087
emotet.vnsextop1.com:2096
emotet.vnsextop1.com:8443
klez.vnsextop1.com:80
klez.vnsextop1.com:22
klez.vnsextop1.com:8080
klez.vnsextop1.com:8880
klez.vnsextop1.com:2052
klez.vnsextop1.com:2082
klez.vnsextop1.com:2086
klez.vnsextop1.com:2095
klez.vnsextop1.com:443
klez.vnsextop1.com:2053
klez.vnsextop1.com:2083
klez.vnsextop1.com:2087
klez.vnsextop1.com:2096
klez.vnsextop1.com:8443

Mutex

5GuzQZf1UkX6

Attributes

delay
0
install
true
install_file
0ecnb.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
behavioral1/files/0x0008000000024244-8.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-1-5-21-889581200-2041691093-2048517887-1000\Control Panel\International\Geo\Nation	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe

Executes dropped EXE 2 IoCs

pid	Process
4688	0ecnb.exe
5092	0ecnb.exe

Outbound SSH connection to public host 2 TTPs 3 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc	pid	Process
SSH destination	45	185.100.234.69:22	4688	0ecnb.exe
SSH destination	69	185.100.234.69:22	4688	0ecnb.exe
SSH destination	72	185.100.234.69:22	4688	0ecnb.exe

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

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
400	cmd.exe
1932	cmd.exe

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0ecnb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0ecnb.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3896	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
4312	schtasks.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
Token: SeDebugPrivilege	4688	0ecnb.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 848 wrote to memory of 400	848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe	86
PID 848 wrote to memory of 1932	848	e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe	88
PID 1932 wrote to memory of 3896	1932	cmd.exe	90
PID 400 wrote to memory of 4312	400	cmd.exe	91
PID 1932 wrote to memory of 5092	1932	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe
"C:\Users\Admin\AppData\Local\Temp\e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:848
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "0ecnb" /tr '"C:\Users\Admin\AppData\Roaming\0ecnb.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:400
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "0ecnb" /tr '"C:\Users\Admin\AppData\Roaming\0ecnb.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4312
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7AF7.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1932
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3896
- - C:\Users\Admin\AppData\Roaming\0ecnb.exe
    "C:\Users\Admin\AppData\Roaming\0ecnb.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5092

C:\Users\Admin\AppData\Roaming\0ecnb.exe
"C:\Users\Admin\AppData\Roaming\0ecnb.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4688

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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Downloads

tmp7AF7.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7AF7.tmp.bat
Size 149B
SHA256 66278f04dd3a48602d94413176b94770fdd4dd4e079db23f438846332c6a0169
MD5 78140863400975b2558622e6664c242f
SHA1 9412a69bf6b71b0fde77c560c65f01e08734ef46
SHA512 6b0d9db2f08be40481c680ddb5f641e05e38f2ee51bdb40c6ec8fe6da8048cd7984bfe2b0ac6690517da3b6e84a854c754828fe42da03212be77d9aa707ecceb
TLSH
T168C02B4261C5EA1E2905142312FED48C92766C193F44FB20C304441D62C0848F4D9385
MD5 SHA1 SHA512 TLSH

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0ecnb.exe

Path C:\Users\Admin\AppData\Roaming\0ecnb.exe
Size 45KB
SHA256 e797b1b0c84fe3048dafaffd762960ebe2d38be2f3920114948a1c84d15db7cd
MD5 cf5b3762daee5a16161b6109e1bd04f0
SHA1 720f2ca2f68f61aec67748602f82dc810f020ac3
SHA512 4ca844e0e6825ed83dcd75ba509bec738cc388847b5c36e63e8fe42fcbdafb250364d82e6565530ab8ac09cb0460dd1a629a64808837d7f66ff8c1f1c22a1933
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2qlLlsHoPEaMPIGLjbwgX3iS3azV3qFMm7W8XtHBDo:wuDWZTpMZSB2OuuEaxGfb3XSS3E91m7g
TLSH
T1C5231A003BE8822BF2BE4F789DF26245467EF5732603D5491CC4519B5713FC69A42AFA
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/848-0-0x0000000000B50000-0x0000000000B62000-memory.dmp

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memory/848-1-0x0000000005580000-0x0000000005590000-memory.dmp

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memory/848-2-0x0000000005590000-0x000000000562C000-memory.dmp

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memory/4688-10-0x0000000005040000-0x0000000005050000-memory.dmp

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memory/4688-13-0x0000000005040000-0x0000000005050000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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