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-1-5-21-2878641211-696417878-3864914810-1000\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

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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe

Deletes itself 1 IoCs

pid	Process
2068	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
4720	InstallUtil.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 3784 set thread context of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
2068	powershell.exe
2068	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe
Token: SeDebugPrivilege	2068	powershell.exe
Token: SeDebugPrivilege	4720	InstallUtil.exe
Token: SeDebugPrivilege	4720	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3784 wrote to memory of 2068	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	99
PID 3784 wrote to memory of 2068	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	99
PID 3784 wrote to memory of 2068	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	99
PID 3784 wrote to memory of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101
PID 3784 wrote to memory of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101
PID 3784 wrote to memory of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101
PID 3784 wrote to memory of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101
PID 3784 wrote to memory of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101
PID 3784 wrote to memory of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101
PID 3784 wrote to memory of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101
PID 3784 wrote to memory of 4720	3784	JaffaCakes118_23c6f72ac16439f390678e968ac5167c.exe	101

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
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3784
- 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:2068
- 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:4720

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

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
41KB

MD5
5d4073b2eb6d217c19f2b22f21bf8d57

SHA1
f0209900fbf08d004b886a0b3ba33ea2b0bf9da8

SHA256
ac1a3f21fcc88f9cee7bf51581eafba24cc76c924f0821deb2afdf1080ddf3d3

SHA512
9ac94880684933ba3407cdc135abc3047543436567af14cd9269c4adc5a6535db7b867d6de0d6238a21b94e69f9890dbb5739155871a624520623a7e56872159

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kirsi5iy.fic.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2068-35-0x0000000005E80000-0x0000000005E9E000-memory.dmp

Filesize
120KB

Download
memory/2068-38-0x0000000006370000-0x000000000638A000-memory.dmp

Filesize
104KB

Download
memory/2068-45-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/2068-42-0x0000000006450000-0x0000000006472000-memory.dmp

Filesize
136KB

Download
memory/2068-41-0x0000000006EF0000-0x0000000006F86000-memory.dmp

Filesize
600KB

Download
memory/2068-40-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/2068-37-0x00000000076A0000-0x0000000007D1A000-memory.dmp

Filesize
6.5MB

Download
memory/2068-36-0x0000000005ED0000-0x0000000005F1C000-memory.dmp

Filesize
304KB

Download
memory/2068-15-0x00000000048E0000-0x0000000004916000-memory.dmp

Filesize
216KB

Download
memory/2068-21-0x0000000004EC0000-0x0000000004EE2000-memory.dmp

Filesize
136KB

Download
memory/2068-17-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/2068-18-0x00000000050C0000-0x00000000056E8000-memory.dmp

Filesize
6.2MB

Download
memory/2068-19-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/2068-23-0x00000000057A0000-0x0000000005806000-memory.dmp

Filesize
408KB

Download
memory/2068-34-0x0000000005880000-0x0000000005BD4000-memory.dmp

Filesize
3.3MB

Download
memory/3784-7-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/3784-4-0x0000000005D00000-0x0000000005D92000-memory.dmp

Filesize
584KB

Download
memory/3784-33-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/3784-3-0x0000000005950000-0x0000000005A24000-memory.dmp

Filesize
848KB

Download
memory/3784-2-0x00000000750BE000-0x00000000750BF000-memory.dmp

Filesize
4KB

Download
memory/3784-0-0x00000000750BE000-0x00000000750BF000-memory.dmp

Filesize
4KB

Download
memory/3784-5-0x0000000006350000-0x00000000068F4000-memory.dmp

Filesize
5.6MB

Download
memory/3784-1-0x0000000000EE0000-0x0000000000FC2000-memory.dmp

Filesize
904KB

Download
memory/3784-6-0x0000000005E10000-0x0000000005E76000-memory.dmp

Filesize
408KB

Download
memory/3784-10-0x0000000006B20000-0x0000000006B36000-memory.dmp

Filesize
88KB

Download
memory/4720-22-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/4720-39-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download
memory/4720-16-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4720-46-0x00000000750B0000-0x0000000075860000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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