b261a7995c16bc433bd714b2830e519c40c3b8bd60ad6a6239ce27e672dc6650

Analysis

max time kernel
76s
max time network
128s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
06/03/2023, 11:36

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General

Target

d5e7b6fe3bb68f1da7ec111231292f02.exe
Size

308KB
MD5

d5e7b6fe3bb68f1da7ec111231292f02
SHA1

1e71cbeb2caba1f955219f916fce7d13c05436b6
SHA256

b261a7995c16bc433bd714b2830e519c40c3b8bd60ad6a6239ce27e672dc6650
SHA512

f9d71917272958ef2cdae91b812d7aca62ee1d0993957ae734aaa7cbdcc88792cb52614515aa8f94c176ac56ac4f89bae902c142c5e187584fe25e7a335ac2c2
SSDEEP

6144:bOsY+HgEiTA14Xn0Ti8v1bbFgXIQdjrfzNt1dEP3:i814Xn0Ti8tbJyIQdjrfzPEP3

Score

10^/10

Malware Config

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	4308	1292	rundll32.exe	38

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-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation	d5e7b6fe3bb68f1da7ec111231292f02.exe

Loads dropped DLL 1 IoCs

pid	Process
5076	rundll32.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3104	5076	WerFault.exe	88

Script User-Agent 1 IoCs

Uses user-agent string associated with script host/environment.

description	flow	ioc
HTTP User-Agent header	21	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
3060	d5e7b6fe3bb68f1da7ec111231292f02.exe
3060	d5e7b6fe3bb68f1da7ec111231292f02.exe
2524	d5e7b6fe3bb68f1da7ec111231292f02.exe
2524	d5e7b6fe3bb68f1da7ec111231292f02.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3060 wrote to memory of 2524	3060	d5e7b6fe3bb68f1da7ec111231292f02.exe	86
PID 3060 wrote to memory of 2524	3060	d5e7b6fe3bb68f1da7ec111231292f02.exe	86
PID 3060 wrote to memory of 2524	3060	d5e7b6fe3bb68f1da7ec111231292f02.exe	86
PID 4308 wrote to memory of 5076	4308	rundll32.exe	88
PID 4308 wrote to memory of 5076	4308	rundll32.exe	88
PID 4308 wrote to memory of 5076	4308	rundll32.exe	88

C:\Users\Admin\AppData\Local\Temp\d5e7b6fe3bb68f1da7ec111231292f02.exe
"C:\Users\Admin\AppData\Local\Temp\d5e7b6fe3bb68f1da7ec111231292f02.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3060
- C:\Users\Admin\AppData\Local\Temp\d5e7b6fe3bb68f1da7ec111231292f02.exe
  "C:\Users\Admin\AppData\Local\Temp\d5e7b6fe3bb68f1da7ec111231292f02.exe" -h
  2⤵
  - Suspicious use of SetWindowsHookEx
  PID:2524

C:\Windows\system32\rundll32.exe
rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
1⤵
- Process spawned unexpected child process
- Suspicious use of WriteProcessMemory
PID:4308
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe "C:\Users\Admin\AppData\Local\Temp\db.dll",open
  2⤵
  - Loads dropped DLL
  PID:5076
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 5076 -s 600
    3⤵
    - Program crash
    PID:3104

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 5076 -ip 5076
1⤵
PID:1168

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\db.dat

Filesize
557KB

MD5
d8fdf3094adfa6cd96ad85cb3b1c0888

SHA1
e1ff8d0d9d04b6da1c78fa2eeb002f89e1c217ef

SHA256
234b037565a89b5d3cdabb963390b84bbfb23f68de1d7a940d250c13d6eb2087

SHA512
a55f0f2a2bc7182c639de20bcafab8ad71416665b3e9f24276d55a03312f0a0014ff12916a08f42edbfd8f58b2bc59e01010271bed028c2c67cce97535af6a94

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dll

Filesize
52KB

MD5
1b20e998d058e813dfc515867d31124f

SHA1
c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

SHA256
24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

SHA512
79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

Download Submit
C:\Users\Admin\AppData\Local\Temp\db.dll

Filesize
52KB

MD5
1b20e998d058e813dfc515867d31124f

SHA1
c9dc9c42a748af18ae1a8c882b90a2b9e3313e6f

SHA256
24a53033a2e89acf65f6a5e60d35cb223585817032635e81bf31264eb7dabd00

SHA512
79849fbdb9a9e7f7684b570d14662448b093b8aa2b23dfd95856db3a78faf75a95d95c51b8aa8506c4fbecffebcc57cd153dda38c830c05b8cd38629fae673c6

Download Submit