d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4

Analysis

max time kernel
117s
max time network
122s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
02/05/2024, 04:00

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General

Target

d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe
Size

138KB
MD5

dc99061f09b1d84db24373c14a80dcf3
SHA1

2e1291768bd9485f7a598bc070cdbfba89eb52f9
SHA256

d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4
SHA512

7a7bfc486f02cf2e64c8977da5ccea1a10cd11885ebfc697019d35a5e12a01dea643ed92734421a2f702126dfe1a2c72aacdf29ccd48cad4aeb20015aa953675
SSDEEP

1536:rC2/fYuPfbESFYXRWhpKRycRd57JkIqFHhzm4hWru/BzihhMN45MF5FvHP132xPT:r7YubEwYXRWhpAJUHhzm4hUukS6Kmecd

Score

8^/10

evasion

Malware Config

Signatures

Stops running service(s) 3 TTPs
evasion

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Executes dropped EXE 1 IoCs

pid	Process
2548	smss.exe

Loads dropped DLL 2 IoCs

pid	Process
1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe
1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe
File opened for modification	C:\Windows\SysWOW64\1230\smss.exe	smss.exe
File opened for modification	C:\Windows\SysWOW64\Service.exe	smss.exe

Launches sc.exe 4 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
2604	sc.exe
2852	sc.exe
2572	sc.exe
3024	sc.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe
2548	smss.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1656 wrote to memory of 2604	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	28
PID 1656 wrote to memory of 2604	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	28
PID 1656 wrote to memory of 2604	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	28
PID 1656 wrote to memory of 2604	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	28
PID 1656 wrote to memory of 3024	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	30
PID 1656 wrote to memory of 3024	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	30
PID 1656 wrote to memory of 3024	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	30
PID 1656 wrote to memory of 3024	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	30
PID 1656 wrote to memory of 2548	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	32
PID 1656 wrote to memory of 2548	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	32
PID 1656 wrote to memory of 2548	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	32
PID 1656 wrote to memory of 2548	1656	d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe	32
PID 2548 wrote to memory of 2572	2548	smss.exe	33
PID 2548 wrote to memory of 2572	2548	smss.exe	33
PID 2548 wrote to memory of 2572	2548	smss.exe	33
PID 2548 wrote to memory of 2572	2548	smss.exe	33
PID 2548 wrote to memory of 2852	2548	smss.exe	35
PID 2548 wrote to memory of 2852	2548	smss.exe	35
PID 2548 wrote to memory of 2852	2548	smss.exe	35
PID 2548 wrote to memory of 2852	2548	smss.exe	35

C:\Users\Admin\AppData\Local\Temp\d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe
"C:\Users\Admin\AppData\Local\Temp\d1926fbcb9555d8d6cb824a5f95e06612bbfc82d948346221612607f62999cb4.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1656
- C:\Windows\SysWOW64\sc.exe
  C:\Windows\system32\sc.exe stop SharedAccess
  2⤵
  - Launches sc.exe
  PID:2604
- C:\Windows\SysWOW64\sc.exe
  C:\Windows\system32\sc.exe stop wscsvc
  2⤵
  - Launches sc.exe
  PID:3024
- C:\Windows\SysWOW64\1230\smss.exe
  C:\Windows\system32\1230\smss.exe -d
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2548
- - C:\Windows\SysWOW64\sc.exe
    C:\Windows\system32\sc.exe stop SharedAccess
    3⤵
    - Launches sc.exe
    PID:2572
- - C:\Windows\SysWOW64\sc.exe
    C:\Windows\system32\sc.exe stop wscsvc
    3⤵
    - Launches sc.exe
    PID:2852

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Windows\SysWOW64\1230\smss.exe

Filesize
138KB

MD5
1cc1ba09b988d99edf90c76e9e197622

SHA1
f3e83b021b4ad95ed7208eab79e2bc8ea485b968

SHA256
dca0a57e344bcb65bb3085924681b1430d0a3d4745b2b8971155a903ad53b9e6

SHA512
5bb16bb69c087ecebb01fe0476183ece6063009f67815ffa70272683b7e59e05b4805a53680a39771cc6d7b7009a81e00be1340fb2979997746758c1384a7344

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