71e842200ac81b7d9d05992724e80618f8cf38b935b056dc741c08d187c0d013

General

Target

9a2206d003d9d376706d886d987773f6_JC.exe
Size

132KB
MD5

9a2206d003d9d376706d886d987773f6
SHA1

22215da078d6a8ea5ca7d84a23c38bcadd0513ef
SHA256

71e842200ac81b7d9d05992724e80618f8cf38b935b056dc741c08d187c0d013
SHA512

0f8729d01296e6725ac0fe349dd4714f1788b7793d0ef73eddc261c5fb2d7376fada6a89167d5b5d31d3fc3a753c85fcd3c183b94dcf8dd8ffbbaa3d9300baf2
SSDEEP

1536:B3aacz2htqkUla/NGVcJ/gAqcX0JMseuiGSeNVvDi0tMuUJJny3GM+90:Ua/qc9rqzMseNoVv9EJFnM80

Score

8^/10

Malware Config

Signatures

Blocklisted process makes network request 7 IoCs

flow	pid	Process
53	4932	rundll32.exe
63	4932	rundll32.exe
64	4932	rundll32.exe
65	4932	rundll32.exe
77	4932	rundll32.exe
87	4932	rundll32.exe
92	4932	rundll32.exe

Executes dropped EXE 1 IoCs

pid	Process
2916	yswwv.exe

Loads dropped DLL 1 IoCs

pid	Process
4932	rundll32.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1472-0-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/memory/1472-2-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x000a000000023112-5.dat	upx
behavioral2/memory/2916-6-0x0000000000400000-0x0000000000423000-memory.dmp	upx
behavioral2/files/0x000a000000023112-4.dat	upx
behavioral2/memory/2916-8-0x0000000000400000-0x0000000000423000-memory.dmp	upx

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\EvtMgr = "c:\\windows\\SysWOW64\\rundll32.exe \"c:\\mytaq\\dxwxcqjjj.dll\",init"	rundll32.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PHYSICALDRIVE0	rundll32.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	rundll32.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	rundll32.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4892	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4932	rundll32.exe
4932	rundll32.exe
4932	rundll32.exe
4932	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4932	rundll32.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1472	9a2206d003d9d376706d886d987773f6_JC.exe
2916	yswwv.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1472 wrote to memory of 968	1472	9a2206d003d9d376706d886d987773f6_JC.exe	84
PID 1472 wrote to memory of 968	1472	9a2206d003d9d376706d886d987773f6_JC.exe	84
PID 1472 wrote to memory of 968	1472	9a2206d003d9d376706d886d987773f6_JC.exe	84
PID 968 wrote to memory of 4892	968	cmd.exe	86
PID 968 wrote to memory of 4892	968	cmd.exe	86
PID 968 wrote to memory of 4892	968	cmd.exe	86
PID 968 wrote to memory of 2916	968	cmd.exe	88
PID 968 wrote to memory of 2916	968	cmd.exe	88
PID 968 wrote to memory of 2916	968	cmd.exe	88
PID 2916 wrote to memory of 4932	2916	yswwv.exe	90
PID 2916 wrote to memory of 4932	2916	yswwv.exe	90
PID 2916 wrote to memory of 4932	2916	yswwv.exe	90

C:\Users\Admin\AppData\Local\Temp\9a2206d003d9d376706d886d987773f6_JC.exe
"C:\Users\Admin\AppData\Local\Temp\9a2206d003d9d376706d886d987773f6_JC.exe"
1⤵
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1472
- C:\Windows\SysWOW64\cmd.exe
  cmd.exe /c ping 127.0.0.1 -n 2&c:\yswwv.exe "C:\Users\Admin\AppData\Local\Temp\9a2206d003d9d376706d886d987773f6_JC.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:968
- - C:\Windows\SysWOW64\PING.EXE
    ping 127.0.0.1 -n 2
    3⤵
    - Runs ping.exe
    PID:4892
- - \??\c:\yswwv.exe
    c:\yswwv.exe "C:\Users\Admin\AppData\Local\Temp\9a2206d003d9d376706d886d987773f6_JC.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2916
  - - \??\c:\windows\SysWOW64\rundll32.exe
      c:\windows\system32\rundll32.exe "c:\mytaq\dxwxcqjjj.dll",init c:\yswwv.exe
      4⤵
      Blocklisted process makes network request
      Loads dropped DLL
      Adds Run key to start application
      Writes to the Master Boot Record (MBR)
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Pre-OS Boot

1

T1542

Bootkit

1

T1542.003

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\mytaq\dxwxcqjjj.dll

Filesize
50KB

MD5
ab32c5bfd7ecfbe9ed733dfb81210933

SHA1
4d5c6e7a0031691f12e78b096ff928b0d55bdfab

SHA256
a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a

SHA512
59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5

Download Submit
C:\yswwv.exe

Filesize
132KB

MD5
7adfec337ad4116cc639e78c54eba382

SHA1
f7af9a8c43fec376695ca166996ba89c55ccdbf8

SHA256
73b546c77aa3c5d2a518f38f02c0118200ea63b521c953aeb8169b427cd299af

SHA512
c1ee59429e663b2c1207e84b16b4de116863fd826956fcbf62042bc2c554da0b4614840fd8f3e3413cfc541cd6b17d28b31cd39f8f8d8f8ed996cb3d12ce830a

Download Submit
\??\c:\mytaq\dxwxcqjjj.dll

Filesize
50KB

MD5
ab32c5bfd7ecfbe9ed733dfb81210933

SHA1
4d5c6e7a0031691f12e78b096ff928b0d55bdfab

SHA256
a632527bcd457c9a4cfce83e7a9a675baff790b0279de5d8ea3192dfb2dd888a

SHA512
59b971146292074d76d23d5f26889108f4d6e33804332449f4c589bf8a8d53e37ac8dfea47e9d3c5ae0f382ae1acf25c4968bea87b3f5ff9d51f2274229c1ab5

Download Submit
\??\c:\yswwv.exe

Filesize
132KB

MD5
7adfec337ad4116cc639e78c54eba382

SHA1
f7af9a8c43fec376695ca166996ba89c55ccdbf8

SHA256
73b546c77aa3c5d2a518f38f02c0118200ea63b521c953aeb8169b427cd299af

SHA512
c1ee59429e663b2c1207e84b16b4de116863fd826956fcbf62042bc2c554da0b4614840fd8f3e3413cfc541cd6b17d28b31cd39f8f8d8f8ed996cb3d12ce830a

Download Submit
memory/1472-0-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/1472-2-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/2916-6-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/2916-8-0x0000000000400000-0x0000000000423000-memory.dmp

Filesize
140KB

Download
memory/4932-11-0x0000000010000000-0x0000000010032000-memory.dmp

Filesize
200KB

Download
memory/4932-12-0x0000000010000000-0x0000000010032000-memory.dmp

Filesize
200KB

Download
memory/4932-13-0x0000000010000000-0x0000000010032000-memory.dmp

Filesize
200KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads