asyncrat | 1fa723612815adefbb73d373505eb0e77074b99daa72e3bdd00493f8468100bb

General

Target

JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
Size

885KB
MD5

23c6f72ac16439f390678e968ac5167c
SHA1

80f6b5e2745ed825c91f6f621d8e3938dda1ed21
SHA256

1fa723612815adefbb73d373505eb0e77074b99daa72e3bdd00493f8468100bb
SHA512

80156d8db04299c779744c89997a6e10d582c93ecdf851a0aad9d55d056e3dc70eaad9a20d88303444abe99da9a792c9bb179cea96c9f426f9f57d7a71422af1
SSDEEP

24576:sc7SuydrlH5xAphuo2QJyOuY0h/8MuXx8is:szu+ZH5Wpt2QJyTn8jXmp

Score

10^/10

asyncrat default defense_evasion discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

74.201.28.237:6606

74.201.28.237:7707

74.201.28.237:8808

Mutex

WmiPrvSE_6SI8OkDnk

Attributes

delay
3
install
false
install_file
WmiPrvSE.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\Windows10UpgraderApp.exe\","	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe

System Binary Proxy Execution: InstallUtil 1 TTPs 2 IoCs

Abuse InstallUtil to proxy execution of malicious code.

defense_evasion

InstallUtil

T1218.004

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
Key opened	\Registry\Machine\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Custom\InstallUtil.exe	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe

Deletes itself 1 IoCs

pid	Process
2660	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
2804	InstallUtil.exe

Loads dropped DLL 1 IoCs

pid	Process
2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2572 set thread context of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34

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 3 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	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
2660	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
Token: SeDebugPrivilege	2660	powershell.exe
Token: SeDebugPrivilege	2804	InstallUtil.exe
Token: SeDebugPrivilege	2804	InstallUtil.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2572 wrote to memory of 2660	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	32
PID 2572 wrote to memory of 2660	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	32
PID 2572 wrote to memory of 2660	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	32
PID 2572 wrote to memory of 2660	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	32
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34
PID 2572 wrote to memory of 2804	2572	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	34

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe"
1⤵
- Modifies WinLogon for persistence
- System Binary Proxy Execution: InstallUtil
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2572
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Start-Sleep -s 5; Remove-Item -Path "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe" -Force
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2660
- C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
  C:\Users\Admin\AppData\Local\Temp\InstallUtil.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:2804

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Winlogon Helper DLL

1

T1547.004

Defense Evasion

Indicator Removal

1

T1070

File Deletion

Modify Registry

System Binary Proxy Execution

1

T1218

InstallUtil

1

T1218.004

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

\Users\Admin\AppData\Local\Temp\InstallUtil.exe

Filesize
40KB

MD5
91c9ae9c9a17a9db5e08b120e668c74c

SHA1
50770954c1ceb0bb6f1d5d3f2de2a0a065773723

SHA256
e56a7e5d3ab9675555e2897fc3faa2dd9265008a4967a7d54030ab8184d2d38f

SHA512
ca504af192e3318359d4742a2ef26ae1b5d040a4f9942782e02549a310158d5d5dbf919b4c748c31ee609d2046bd23ee0c22712891c86ae4a1e3a58c6e67647e

Download Submit
memory/2572-26-0x0000000074C60000-0x000000007534E000-memory.dmp

Filesize
6.9MB

Download
memory/2572-1-0x00000000009E0000-0x0000000000AC2000-memory.dmp

Filesize
904KB

Download
memory/2572-2-0x0000000074C6E000-0x0000000074C6F000-memory.dmp

Filesize
4KB

Download
memory/2572-3-0x0000000002380000-0x0000000002454000-memory.dmp

Filesize
848KB

Download
memory/2572-6-0x0000000000C00000-0x0000000000C16000-memory.dmp

Filesize
88KB

Download
memory/2572-0-0x0000000074C6E000-0x0000000074C6F000-memory.dmp

Filesize
4KB

Download
memory/2804-13-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2804-19-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2804-16-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2804-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2804-12-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2804-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2804-10-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2804-23-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads