3be2acb935f988318b4743621a6bea99d55d51497a0834ceef484901382916b6

General

Target

Defender_Update_Setup_778795.exe
Size

4.5MB
MD5

c9baa2a4a6391e1da55f0183ea74e7a4
SHA1

d1515aa4508d7eaf99ff868dabbee2aa20d9ba5a
SHA256

3be2acb935f988318b4743621a6bea99d55d51497a0834ceef484901382916b6
SHA512

b004bf343636f7fc313ee8c0f204002fc0dbcee61ddc46263275e4076c0c766d4a1cd4867cc7043c7c595023e56bf539b6648c83609ab1cb111f0d5fdf51cec9
SSDEEP

98304:DwREt0WHawX9sYuirFIuoR7p7C14/Mxob+bA3JbmyCO/l4z:5tao2uG9C1SMxZimyCO4

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 2 IoCs

pid	Process
2724	Defender_Update_Setup_778795.tmp
2612	Defender_Update_Setup_778795.tmp

Loads dropped DLL 4 IoCs

pid	Process
2176	Defender_Update_Setup_778795.exe
2724	Defender_Update_Setup_778795.tmp
2700	Defender_Update_Setup_778795.exe
2612	Defender_Update_Setup_778795.tmp

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Defender_Update_Setup_778795.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Defender_Update_Setup_778795.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Defender_Update_Setup_778795.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Defender_Update_Setup_778795.exe

Script User-Agent 1 IoCs

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

description	flow	ioc
HTTP User-Agent header	3	Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5)

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2176 wrote to memory of 2724	2176	Defender_Update_Setup_778795.exe	30
PID 2176 wrote to memory of 2724	2176	Defender_Update_Setup_778795.exe	30
PID 2176 wrote to memory of 2724	2176	Defender_Update_Setup_778795.exe	30
PID 2176 wrote to memory of 2724	2176	Defender_Update_Setup_778795.exe	30
PID 2176 wrote to memory of 2724	2176	Defender_Update_Setup_778795.exe	30
PID 2176 wrote to memory of 2724	2176	Defender_Update_Setup_778795.exe	30
PID 2176 wrote to memory of 2724	2176	Defender_Update_Setup_778795.exe	30
PID 2724 wrote to memory of 2700	2724	Defender_Update_Setup_778795.tmp	31
PID 2724 wrote to memory of 2700	2724	Defender_Update_Setup_778795.tmp	31
PID 2724 wrote to memory of 2700	2724	Defender_Update_Setup_778795.tmp	31
PID 2724 wrote to memory of 2700	2724	Defender_Update_Setup_778795.tmp	31
PID 2724 wrote to memory of 2700	2724	Defender_Update_Setup_778795.tmp	31
PID 2724 wrote to memory of 2700	2724	Defender_Update_Setup_778795.tmp	31
PID 2724 wrote to memory of 2700	2724	Defender_Update_Setup_778795.tmp	31
PID 2700 wrote to memory of 2612	2700	Defender_Update_Setup_778795.exe	32
PID 2700 wrote to memory of 2612	2700	Defender_Update_Setup_778795.exe	32
PID 2700 wrote to memory of 2612	2700	Defender_Update_Setup_778795.exe	32
PID 2700 wrote to memory of 2612	2700	Defender_Update_Setup_778795.exe	32
PID 2700 wrote to memory of 2612	2700	Defender_Update_Setup_778795.exe	32
PID 2700 wrote to memory of 2612	2700	Defender_Update_Setup_778795.exe	32
PID 2700 wrote to memory of 2612	2700	Defender_Update_Setup_778795.exe	32

C:\Users\Admin\AppData\Local\Temp\Defender_Update_Setup_778795.exe
"C:\Users\Admin\AppData\Local\Temp\Defender_Update_Setup_778795.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2176
- C:\Users\Admin\AppData\Local\Temp\is-M6N6P.tmp\Defender_Update_Setup_778795.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-M6N6P.tmp\Defender_Update_Setup_778795.tmp" /SL5="$30144,3764700,857088,C:\Users\Admin\AppData\Local\Temp\Defender_Update_Setup_778795.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2724
- - C:\Users\Admin\AppData\Local\Temp\Defender_Update_Setup_778795.exe
    "C:\Users\Admin\AppData\Local\Temp\Defender_Update_Setup_778795.exe" /VERYSILENT
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2700
  - - C:\Users\Admin\AppData\Local\Temp\is-P8DRI.tmp\Defender_Update_Setup_778795.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-P8DRI.tmp\Defender_Update_Setup_778795.tmp" /SL5="$40144,3764700,857088,C:\Users\Admin\AppData\Local\Temp\Defender_Update_Setup_778795.exe" /VERYSILENT
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      PID:2612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\is-M6N6P.tmp\Defender_Update_Setup_778795.tmp

Filesize
3.2MB

MD5
9cf66b9ba3daaccb510ce72604db4203

SHA1
c1a5b9aa6b0c61857000e4f5e519f40eae4f1ba8

SHA256
10fa4f46acd467ff5ecf3c19acb0663f275fec8334259c8236a325c8124ea6ad

SHA512
7c7bc0be1fa7d08862c4f83e2200111f6209052886e511fe41ae7f60b0e4557cc72e79c6b82aa50ba714366d9ef2ef981b5e4478bbadb2e308cc49839d63a6dc

Download Submit
\Users\Admin\AppData\Local\Temp\is-4OCR6.tmp\_isetup\_isdecmp.dll

Filesize
28KB

MD5
077cb4461a2767383b317eb0c50f5f13

SHA1
584e64f1d162398b7f377ce55a6b5740379c4282

SHA256
8287d0e287a66ee78537c8d1d98e426562b95c50f569b92cea9ce36a9fa57e64

SHA512
b1fcb0265697561ef497e6a60fcee99dc5ea0cf02b4010da9f5ed93bce88bdfea6bfe823a017487b8059158464ea29636aad8e5f9dd1e8b8a1b6eaaab670e547

Download Submit
memory/2176-0-0x0000000000250000-0x000000000032F000-memory.dmp

Filesize
892KB

Download
memory/2176-2-0x0000000000251000-0x00000000002F9000-memory.dmp

Filesize
672KB

Download
memory/2176-20-0x0000000000250000-0x000000000032F000-memory.dmp

Filesize
892KB

Download
memory/2612-32-0x0000000000200000-0x0000000000546000-memory.dmp

Filesize
3.3MB

Download
memory/2700-15-0x0000000000250000-0x000000000032F000-memory.dmp

Filesize
892KB

Download
memory/2700-34-0x0000000000250000-0x000000000032F000-memory.dmp

Filesize
892KB

Download
memory/2724-8-0x0000000000050000-0x0000000000396000-memory.dmp

Filesize
3.3MB

Download
memory/2724-18-0x0000000000050000-0x0000000000396000-memory.dmp

Filesize
3.3MB

Download

Analysis

Sharing