eb7d2f18d5fc15bbdeb4da2d297db7ec72004f54a4a6ef8194c23d0651538a3f

Analysis

max time kernel
140s
max time network
176s
platform
windows7_x64
resource
win7v20210408
submitted
23/05/2021, 08:00

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General

Target
a8f5177fee0e96f74efcca064555968a.exe
Size 13.3MB
Sample210523-szy8a82j7e
SHA256 eb7d2f18d5fc15bbdeb4da2d297db7ec72004f54a4a6ef8194c23d0651538a3f
MD5 a8f5177fee0e96f74efcca064555968a
SHA1 c47d6a6049eaf9686a1582f14470581dcd26d3c3
SHA512 2168a6783d33c0b6dae00272bb9d5837f7ccc32a4a7441d89c7e3928054362da78efdec551ff442570b6a0e9b2661a1b79b37d911c92344eac44c22f4fdda00b
MD5 SHA1 SHA512

Score

8^/10

evasion persistence

Malware Config

Signatures

Creates new service(s) 1 TTPs
persistence

New Service
T1050

Executes dropped EXE 1 IoCs

pid	Process
1616	yssjuduw.exe

Modifies Windows Firewall 1 TTPs
evasion

Modify Existing Service
T1031
Sets service image path in registry 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

Deletes itself 1 IoCs

pid	Process
1428	svchost.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1616 set thread context of 1428	1616	yssjuduw.exe	42

Launches sc.exe
Sc.exe is a Windows utlilty to control services on the system.
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1660 wrote to memory of 340	1660	a8f5177fee0e96f74efcca064555968a.exe	26
PID 1660 wrote to memory of 340	1660	a8f5177fee0e96f74efcca064555968a.exe	26
PID 1660 wrote to memory of 340	1660	a8f5177fee0e96f74efcca064555968a.exe	26
PID 1660 wrote to memory of 340	1660	a8f5177fee0e96f74efcca064555968a.exe	26
PID 1660 wrote to memory of 1044	1660	a8f5177fee0e96f74efcca064555968a.exe	31
PID 1660 wrote to memory of 1044	1660	a8f5177fee0e96f74efcca064555968a.exe	31
PID 1660 wrote to memory of 1044	1660	a8f5177fee0e96f74efcca064555968a.exe	31
PID 1660 wrote to memory of 1044	1660	a8f5177fee0e96f74efcca064555968a.exe	31
PID 1660 wrote to memory of 1324	1660	a8f5177fee0e96f74efcca064555968a.exe	33
PID 1660 wrote to memory of 1324	1660	a8f5177fee0e96f74efcca064555968a.exe	33
PID 1660 wrote to memory of 1324	1660	a8f5177fee0e96f74efcca064555968a.exe	33
PID 1660 wrote to memory of 1324	1660	a8f5177fee0e96f74efcca064555968a.exe	33
PID 1660 wrote to memory of 1848	1660	a8f5177fee0e96f74efcca064555968a.exe	35
PID 1660 wrote to memory of 1848	1660	a8f5177fee0e96f74efcca064555968a.exe	35
PID 1660 wrote to memory of 1848	1660	a8f5177fee0e96f74efcca064555968a.exe	35
PID 1660 wrote to memory of 1848	1660	a8f5177fee0e96f74efcca064555968a.exe	35
PID 1660 wrote to memory of 384	1660	a8f5177fee0e96f74efcca064555968a.exe	37
PID 1660 wrote to memory of 384	1660	a8f5177fee0e96f74efcca064555968a.exe	37
PID 1660 wrote to memory of 384	1660	a8f5177fee0e96f74efcca064555968a.exe	37
PID 1660 wrote to memory of 384	1660	a8f5177fee0e96f74efcca064555968a.exe	37
PID 1660 wrote to memory of 1864	1660	a8f5177fee0e96f74efcca064555968a.exe	40
PID 1660 wrote to memory of 1864	1660	a8f5177fee0e96f74efcca064555968a.exe	40
PID 1660 wrote to memory of 1864	1660	a8f5177fee0e96f74efcca064555968a.exe	40
PID 1660 wrote to memory of 1864	1660	a8f5177fee0e96f74efcca064555968a.exe	40
PID 1616 wrote to memory of 1428	1616	yssjuduw.exe	42
PID 1616 wrote to memory of 1428	1616	yssjuduw.exe	42
PID 1616 wrote to memory of 1428	1616	yssjuduw.exe	42
PID 1616 wrote to memory of 1428	1616	yssjuduw.exe	42
PID 1616 wrote to memory of 1428	1616	yssjuduw.exe	42
PID 1616 wrote to memory of 1428	1616	yssjuduw.exe	42

C:\Users\Admin\AppData\Local\Temp\a8f5177fee0e96f74efcca064555968a.exe
"C:\Users\Admin\AppData\Local\Temp\a8f5177fee0e96f74efcca064555968a.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1660
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\soutqxq\
  2⤵
  PID:340
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yssjuduw.exe" C:\Windows\SysWOW64\soutqxq\
  2⤵
  PID:1044
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" create soutqxq binPath= "C:\Windows\SysWOW64\soutqxq\yssjuduw.exe /d\"C:\Users\Admin\AppData\Local\Temp\a8f5177fee0e96f74efcca064555968a.exe\"" type= own start= auto DisplayName= "wifi support"
  2⤵
  PID:1324
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" description soutqxq "wifi internet conection"
  2⤵
  PID:1848
- C:\Windows\SysWOW64\sc.exe
  "C:\Windows\System32\sc.exe" start soutqxq
  2⤵
  PID:384
- C:\Windows\SysWOW64\netsh.exe
  "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
  2⤵
  PID:1864

C:\Windows\SysWOW64\soutqxq\yssjuduw.exe
C:\Windows\SysWOW64\soutqxq\yssjuduw.exe /d"C:\Users\Admin\AppData\Local\Temp\a8f5177fee0e96f74efcca064555968a.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1616
- C:\Windows\SysWOW64\svchost.exe
  svchost.exe
  2⤵
  - Deletes itself
  PID:1428

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

New Service

T1050

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

New Service

T1050

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1428-71-0x0000000000080000-0x0000000000095000-memory.dmp

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memory/1616-75-0x0000000000400000-0x000000000046A000-memory.dmp

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memory/1660-59-0x00000000762C1000-0x00000000762C3000-memory.dmp

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memory/1660-61-0x0000000000400000-0x000000000046A000-memory.dmp

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memory/1660-60-0x0000000000220000-0x0000000000233000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads