e88daa890f42b5d6da8086978c51f9a075f5fa69614c1fe8793435c4e3e69f8b

Analysis

max time kernel
149s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
09/01/2024, 16:21

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General

Target

4ec8ca8dd0c11283448403c20ef87a8f.exe
Size

12KB
MD5

4ec8ca8dd0c11283448403c20ef87a8f
SHA1

89a8e0a015e12473ed6fe17d1cf310e7ed55fc30
SHA256

e88daa890f42b5d6da8086978c51f9a075f5fa69614c1fe8793435c4e3e69f8b
SHA512

b4c4693b3175aaad772783636bb4f1d1a6d5e971d47ac3e2b25a96b1542f61e1375ea5fa3ba209779c801de9e749f7caf446d49fd29e959ffba48df0402150b3
SSDEEP

192:Ixs1aDvPtCdusj0bLoiYPF8laLlLcsAQt+NU5EA+R5fdr3rWMBAe9ZbJnIyCaoZk:IlbhsIbLoiYvNcsttPy5fzAeKywZUL55

Score

8^/10

persistence

Malware Config

Signatures

Sets service image path in registry 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\msupdate\ImagePath = "c:\\windows\\system32\\mssrv32.exe"	svchost.exe

Deletes itself 1 IoCs

pid	Process
4868	svchost.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\D4C1C.tmp.sys	4ec8ca8dd0c11283448403c20ef87a8f.exe
File created	\??\c:\windows\SysWOW64\mssrv32.exe	4ec8ca8dd0c11283448403c20ef87a8f.exe
File opened for modification	\??\c:\windows\SysWOW64\mssrv32.exe	4ec8ca8dd0c11283448403c20ef87a8f.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3008 set thread context of 4868	3008	4ec8ca8dd0c11283448403c20ef87a8f.exe	30

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1960	4868	WerFault.exe	30

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeLoadDriverPrivilege	3988	4ec8ca8dd0c11283448403c20ef87a8f.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3988 wrote to memory of 3008	3988	4ec8ca8dd0c11283448403c20ef87a8f.exe	22
PID 3988 wrote to memory of 3008	3988	4ec8ca8dd0c11283448403c20ef87a8f.exe	22
PID 3988 wrote to memory of 3008	3988	4ec8ca8dd0c11283448403c20ef87a8f.exe	22
PID 3008 wrote to memory of 4868	3008	4ec8ca8dd0c11283448403c20ef87a8f.exe	30
PID 3008 wrote to memory of 4868	3008	4ec8ca8dd0c11283448403c20ef87a8f.exe	30
PID 3008 wrote to memory of 4868	3008	4ec8ca8dd0c11283448403c20ef87a8f.exe	30
PID 3008 wrote to memory of 4868	3008	4ec8ca8dd0c11283448403c20ef87a8f.exe	30

C:\Users\Admin\AppData\Local\Temp\4ec8ca8dd0c11283448403c20ef87a8f.exe
"C:\Users\Admin\AppData\Local\Temp\4ec8ca8dd0c11283448403c20ef87a8f.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3988
- \??\c:\users\admin\appdata\local\temp\4ec8ca8dd0c11283448403c20ef87a8f.exe
  c:\users\admin\appdata\local\temp\4ec8ca8dd0c11283448403c20ef87a8f.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:3008
- - C:\Windows\SysWOW64\svchost.exe
    C:\Windows\system32\svchost.exe
    3⤵
    - Sets service image path in registry
    - Deletes itself
    PID:4868
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4868 -s 344
      4⤵
      Program crash
      PID:1960

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4868 -ip 4868
1⤵
PID:920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\??\c:\windows\SysWOW64\mssrv32.exe

Filesize
12KB

MD5
4ec8ca8dd0c11283448403c20ef87a8f

SHA1
89a8e0a015e12473ed6fe17d1cf310e7ed55fc30

SHA256
e88daa890f42b5d6da8086978c51f9a075f5fa69614c1fe8793435c4e3e69f8b

SHA512
b4c4693b3175aaad772783636bb4f1d1a6d5e971d47ac3e2b25a96b1542f61e1375ea5fa3ba209779c801de9e749f7caf446d49fd29e959ffba48df0402150b3

Download Submit
memory/3008-5-0x0000000015110000-0x0000000015119000-memory.dmp

Filesize
36KB

Download
memory/3988-1-0x0000000015110000-0x0000000015119000-memory.dmp

Filesize
36KB

Download
memory/3988-6-0x0000000015110000-0x0000000015119000-memory.dmp

Filesize
36KB

Download
memory/4868-4-0x0000000015110000-0x0000000015119000-memory.dmp

Filesize
36KB

Download
memory/4868-8-0x0000000015110000-0x0000000015119000-memory.dmp

Filesize
36KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads