46aa6ab37446729db4539b16deffd407db35627861ecadb0e4a3f052a0195c13

Analysis

max time kernel
145s
max time network
138s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
01-07-2024 21:30

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General

Target

upgrade.exe
Size

656KB
MD5

9072c7ab788ae840d16e5d1669029a97
SHA1

7672619eb461756a7e1353e350ec57e9bdafce7c
SHA256

3f62c010d1806625a8e2e099d76143ff8d0ef6a09fc02034a022e0ef3b336148
SHA512

0fb2b4011759e575831e356d13a6f1208d901c971f04e0e5b8ad99b3a58935784cda18ed7fd03ca9c49dfd59437d7ac960578d03a0da2575236a75017d1b6c4a
SSDEEP

12288:5qHsGleIjHQIXLRqomJ8JioWzmNG2APCYSZVrC1iHYuVgVus2zYtZ:5UwKf8omJ8JiPNPCjZVKiHiVhhZ

Score

7^/10

discovery

Malware Config

Signatures

Executes dropped EXE 4 IoCs

pid	Process
4592	browserseek.exe
2036	browserseek.exe
3612	browserseek177.exe
1672	browserseek.exe

Loads dropped DLL 3 IoCs

pid	Process
2036	browserseek.exe
3612	browserseek177.exe
1672	browserseek.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5	browserseek177.exe
File created	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE\TDBKEQG5.htm	browserseek177.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5	browserseek177.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE	browserseek177.exe
File opened for modification	C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies	browserseek177.exe

Drops file in Program Files directory 4 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\BrowserSeek\browserseek.dll	browserseek.exe
File opened for modification	C:\Program Files (x86)\BrowserSeek\browserseek.dll	browserseek.exe
File created	C:\Program Files (x86)\BrowserSeek\browserseek.exe	browserseek.exe
File created	C:\Program Files (x86)\BrowserSeek\uninstall.exe	upgrade.exe

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

System Information Discovery
T1082

NSIS installer 1 IoCs

installer

resource	yara_rule
behavioral2/files/0x000700000002359f-36.dat	nsis_installer_1

Modifies data under HKEY_USERS 8 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:"	browserseek177.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	browserseek177.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1"	browserseek177.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1"	browserseek177.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1"	browserseek177.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0"	browserseek177.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix	browserseek177.exe
Set value (str)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:"	browserseek177.exe

Suspicious behavior: EnumeratesProcesses 60 IoCs

pid	Process
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe
3612	browserseek177.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
1672	browserseek.exe
1672	browserseek.exe
1672	browserseek.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2604 wrote to memory of 4592	2604	upgrade.exe	88
PID 2604 wrote to memory of 4592	2604	upgrade.exe	88
PID 2604 wrote to memory of 4592	2604	upgrade.exe	88
PID 2604 wrote to memory of 2036	2604	upgrade.exe	89
PID 2604 wrote to memory of 2036	2604	upgrade.exe	89
PID 2604 wrote to memory of 2036	2604	upgrade.exe	89
PID 3612 wrote to memory of 1672	3612	browserseek177.exe	91
PID 3612 wrote to memory of 1672	3612	browserseek177.exe	91
PID 3612 wrote to memory of 1672	3612	browserseek177.exe	91

C:\Users\Admin\AppData\Local\Temp\upgrade.exe
"C:\Users\Admin\AppData\Local\Temp\upgrade.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2604
- C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\browserseek.exe
  "C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\browserseek.exe" "C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\browserseek.dll" 3826683820
  2⤵
  - Executes dropped EXE
  PID:4592
- C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\browserseek.exe
  "C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\browserseek.exe" "C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\browserseek.dll" larezobit "" yipopuriba
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  PID:2036

C:\ProgramData\BrowserSeek\browserseek177.exe
"C:\ProgramData\BrowserSeek\browserseek177.exe" "C:\Program Files (x86)\BrowserSeek\browserseek.dll" kimupuyi givefokimu
1⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3612
- C:\Program Files (x86)\BrowserSeek\browserseek.exe
  "C:\Program Files (x86)\BrowserSeek\browserseek.exe" "C:\Program Files (x86)\BrowserSeek\browserseek.dll" puribavape wolizamev
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetWindowsHookEx
  PID:1672

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4244,i,13544508926340531097,6671217806016090640,262144 --variations-seed-version --mojo-platform-channel-handle=4240 /prefetch:8
1⤵
PID:1496

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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\nskDFE2.tmp\browserseek.dll

Filesize
560KB

MD5
4c0b9b55f9bf6a132ec8e8486e45c951

SHA1
d0d90d1a2217d0baa15b45a28a870dac782c3526

SHA256
bae5ecfb745db693c801a235ff138da28c3dba149bca29f3c1d35836d8c11d98

SHA512
0d4dce0481a1cdffb9f6630ce2a163f100b163cd58d7e3426ca83513ffe0b90aa0373928b2bc1af00aa739843fa740a283ff5df8eea19b3754c0834091fc618d

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\browserseek.dll

Filesize
560KB

MD5
83bc9313c669ed8d9a61714a8e0efb10

SHA1
1b52cdfe847a55ae069df6e64506f7b661271ab2

SHA256
73e773968ce0b69521efbfae93376fc0ab96560a9d51f5ff0b5568951f7038a2

SHA512
0a5d199b2190fd41d2787deb29532ba9315869c9f9116c6f19739ce0c3ce1e3d2d48f0b113a7255f63185dc3ab9e3ed24e2f8b5260fe8c13a4ec2dc08995332a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\browserseek.exe

Filesize
48KB

MD5
e6f88bb87363c318c22c44d9be58a49d

SHA1
fcfb85dec82ccb50d021a5d1f7db04344d9dacbd

SHA256
59d9c9197b20786d7ac363ea2dc02c4072ffcc2903fed9ce522149b384fbb890

SHA512
d6bc1821c8222304b1a398d7ce514b22a160f4a66cd013dcedd3e0a05cb445b87e883f7115be442e55dd0cba1579cec6413e2c853d6748fbdc17d0b6f3f0b75f

Download Submit
C:\Users\Admin\AppData\Local\Temp\nskDFE2.tmp\uninstall.exe

Filesize
82KB

MD5
3f0967dccc27c0b022dd6be6a98fa390

SHA1
c57846d9800a9cf8c6a39170a6a045dc80d8dd29

SHA256
9834d7bfea7dc27409d0cebd59175c00a0ee51b64b558abb26c66fed50bc9825

SHA512
1d0bebf9a484ba7727c288156420be9f853537ceebb8d17450646f5e501f2f44d533f31df83c574c0bc8f13c0fe77980d95188a5f5a920cecaf24df8579887f0

Download Submit
memory/1672-44-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/2036-14-0x00000000006B0000-0x0000000000732000-memory.dmp

Filesize
520KB

Download
memory/3612-24-0x00000000005F0000-0x0000000000672000-memory.dmp

Filesize
520KB

Download