asyncrat | e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8

General

Target
e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
Size 45KB
Sample260816-s87mjsec76
SHA256 e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8
MD5 920dfa77476d524793a38ca54f058916
SHA1 3774535e60baadc892d3a0549eb1815cfd24f122
SHA512 a3be13555fbe78a55dce9d8a5d2438f05d438a543bb015c6475c6bf3cbbc4759ed55d6e755bccdd4f9cf272a3ba0b57737537da3d0f43f39837706082f8a4b84
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2ql43Fo9EaOPIJzjbkgX3iPAn32wu+//3lBDZMx:wuDWZTpMZSB2J8Ea3J3brXSP+ru+/TdO
TLSH
T1E4232A003BE8822BF2BE4F78ADF25145867AE5733603D5491CC451DB5613FC69A42AFE
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

ads.zorvec.name:80
ads.zorvec.name:22
ads.zorvec.name:8080
ads.zorvec.name:8880
ads.zorvec.name:2052
ads.zorvec.name:2082
ads.zorvec.name:2086
ads.zorvec.name:2095
ads.zorvec.name:443
ads.zorvec.name:2053
ads.zorvec.name:2083
ads.zorvec.name:2087
ads.zorvec.name:2096
ads.zorvec.name:8443
www.ads.zorvec.name:80
www.ads.zorvec.name:22
www.ads.zorvec.name:8080
www.ads.zorvec.name:8880
www.ads.zorvec.name:2052
www.ads.zorvec.name:2082
www.ads.zorvec.name:2086
www.ads.zorvec.name:2095
www.ads.zorvec.name:443
www.ads.zorvec.name:2053
www.ads.zorvec.name:2083
www.ads.zorvec.name:2087
www.ads.zorvec.name:2096
www.ads.zorvec.name:8443
mydoom.ads.zorvec.name:80
mydoom.ads.zorvec.name:22
mydoom.ads.zorvec.name:8080
mydoom.ads.zorvec.name:8880
mydoom.ads.zorvec.name:2052
mydoom.ads.zorvec.name:2082
mydoom.ads.zorvec.name:2086
mydoom.ads.zorvec.name:2095
mydoom.ads.zorvec.name:443
mydoom.ads.zorvec.name:2053
mydoom.ads.zorvec.name:2083
mydoom.ads.zorvec.name:2087
mydoom.ads.zorvec.name:2096
mydoom.ads.zorvec.name:8443
clop.ads.zorvec.name:80
clop.ads.zorvec.name:22
clop.ads.zorvec.name:8080
clop.ads.zorvec.name:8880
clop.ads.zorvec.name:2052
clop.ads.zorvec.name:2082
clop.ads.zorvec.name:2086
clop.ads.zorvec.name:2095
clop.ads.zorvec.name:443
clop.ads.zorvec.name:2053
clop.ads.zorvec.name:2083
clop.ads.zorvec.name:2087
clop.ads.zorvec.name:2096
clop.ads.zorvec.name:8443

Mutex

6LCQPrYlQEGG

Attributes

delay
0
install
true
install_file
jfaf3.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/0x00080000000245e1-8.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-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe

Executes dropped EXE 2 IoCs

pid	Process
4420	jfaf3.exe
2556	jfaf3.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	20	172.67.144.58:22	4420	jfaf3.exe
SSH destination	32	104.21.28.44:22	4420	jfaf3.exe
SSH destination	109	104.21.28.44:22	4420	jfaf3.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
3764	cmd.exe
3912	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	jfaf3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jfaf3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4076	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
1176	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
Token: SeDebugPrivilege	4420	jfaf3.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4436 wrote to memory of 3764	4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe	88
PID 4436 wrote to memory of 3912	4436	e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe	90
PID 3912 wrote to memory of 4076	3912	cmd.exe	92
PID 3764 wrote to memory of 1176	3764	cmd.exe	93
PID 3912 wrote to memory of 2556	3912	cmd.exe	97

C:\Users\Admin\AppData\Local\Temp\e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe
"C:\Users\Admin\AppData\Local\Temp\e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4436
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "jfaf3" /tr '"C:\Users\Admin\AppData\Roaming\jfaf3.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3764
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "jfaf3" /tr '"C:\Users\Admin\AppData\Roaming\jfaf3.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1176
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp2D26.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3912
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4076
- - C:\Users\Admin\AppData\Roaming\jfaf3.exe
    "C:\Users\Admin\AppData\Roaming\jfaf3.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:2556

C:\Users\Admin\AppData\Roaming\jfaf3.exe
"C:\Users\Admin\AppData\Roaming\jfaf3.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4420

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

tmp2D26.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp2D26.tmp.bat
Size 149B
SHA256 4391545e3f35c1d1893f7e745f5020511959ef616f7bbe44381407cd58ef282a
MD5 d2de0ac89ed28ba094cb825c604199f8
SHA1 c2e80a9ac6630d1fc310651a0688e692bad7b2ba
SHA512 26d5e84264196f4792216871147531bd8b6ca648bd1507b3035f2d15ba739c85b8d8bab17702b7d6776f15872f0e88a80b1d29a792535f1a48cf79a5f552497f
TLSH
T14CC02B6365CAEA1E3C09641702FAD58C91726C6E3F50FB00D308444D128044DF0D9381
MD5 SHA1 SHA512 TLSH

Submit Download

jfaf3.exe

Path C:\Users\Admin\AppData\Roaming\jfaf3.exe
Size 45KB
SHA256 e5fcbb244c1603e8c0458517bf888155d7e07f988842a40101e9df5ae78802e8
MD5 920dfa77476d524793a38ca54f058916
SHA1 3774535e60baadc892d3a0549eb1815cfd24f122
SHA512 a3be13555fbe78a55dce9d8a5d2438f05d438a543bb015c6475c6bf3cbbc4759ed55d6e755bccdd4f9cf272a3ba0b57737537da3d0f43f39837706082f8a4b84
SSDEEP 768:wuDWZTpw7bmaWUg3gSk0mo2ql43Fo9EaOPIJzjbkgX3iPAn32wu+//3lBDZMx:wuDWZTpMZSB2J8Ea3J3brXSP+ru+/TdO
TLSH
T1E4232A003BE8822BF2BE4F78ADF25145867AE5733603D5491CC451DB5613FC69A42AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4420-10-0x0000000004B80000-0x0000000004B90000-memory.dmp

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memory/4420-13-0x0000000004B80000-0x0000000004B90000-memory.dmp

Download

memory/4436-0-0x0000000000D10000-0x0000000000D22000-memory.dmp

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memory/4436-1-0x0000000005660000-0x0000000005670000-memory.dmp

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memory/4436-2-0x0000000005710000-0x00000000057AC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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