asyncrat | 89a03c1c7f6e1d6ef127784ff5d239631e97798c6d6bbe1a761feb3386e87a2f

General

Target

de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
Size

866KB
MD5

17d02350b80c3c03c0be2b1acab650d1
SHA1

775181f6686d21806ba7e6fe4ae1ecdc82d0157f
SHA256

de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4
SHA512

e61b19867eb0aff9d43ab7f13ac73217d0bd244e8b908eb902940315d77c3df67fbde40f7d80d602d8f491065fdb98791deb5f3fd4c122ef010f09616d1aaade
SSDEEP

3072:dBUyU7/NUauKvxUjUYqDbf5PBb6Tx3zU5IYUeyUwgUn1UdjgUtGU4rZ/ME+h0UIx:CQdx8nHZtwjWK3FFQgzv1x5

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

hgjvhnfgg.duckdns.org:8057

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Local\\Temp\\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe\""	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe

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-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\<Unknown> = "C:\\Users\\Admin\\AppData\\Local\\Temp\\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe"	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe = "C:\\Users\\Admin\\AppData\\Local\\Temp\\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe"	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 13 IoCs

pid	Process
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3164 set thread context of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
448	3164	WerFault.exe	82

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2488	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 3444	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	83
PID 3164 wrote to memory of 3444	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	83
PID 3164 wrote to memory of 3444	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	83
PID 3444 wrote to memory of 2488	3444	cmd.exe	86
PID 3444 wrote to memory of 2488	3444	cmd.exe	86
PID 3444 wrote to memory of 2488	3444	cmd.exe	86
PID 3164 wrote to memory of 1068	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	89
PID 3164 wrote to memory of 1068	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	89
PID 3164 wrote to memory of 1068	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	89
PID 3164 wrote to memory of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90
PID 3164 wrote to memory of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90
PID 3164 wrote to memory of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90
PID 3164 wrote to memory of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90
PID 3164 wrote to memory of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90
PID 3164 wrote to memory of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90
PID 3164 wrote to memory of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90
PID 3164 wrote to memory of 3896	3164	de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe	90

C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
"C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe"
1⤵
- Modifies WinLogon for persistence
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 1
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3444
- - C:\Windows\SysWOW64\timeout.exe
    timeout 1
    3⤵
    - Delays execution with timeout.exe
    PID:2488
- C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
  "C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe"
  2⤵
  PID:1068
- C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
  "C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe"
  2⤵
  PID:3896
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3164 -s 1112
  2⤵
  - Program crash
  PID:448

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3164 -ip 3164
1⤵
PID:4076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3164-0-0x000000007480E000-0x000000007480F000-memory.dmp

Filesize
4KB

Download
memory/3164-1-0x00000000009E0000-0x0000000000ABC000-memory.dmp

Filesize
880KB

Download
memory/3164-2-0x0000000005460000-0x00000000054FC000-memory.dmp

Filesize
624KB

Download
memory/3164-3-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/3164-4-0x00000000053C0000-0x00000000053E8000-memory.dmp

Filesize
160KB

Download
memory/3164-5-0x0000000005BB0000-0x0000000006154000-memory.dmp

Filesize
5.6MB

Download
memory/3164-9-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/3896-7-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3896-8-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/3896-10-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download
memory/3896-11-0x0000000074800000-0x0000000074FB0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads