Analysis
-
max time kernel
1102s -
max time network
1112s -
platform
windows11-21h2_x64 -
resource
win11-20240508-en -
resource tags
arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system -
submitted
19-06-2024 22:02
Static task
static1
Behavioral task
behavioral1
Sample
Krotten Ransomware.zip
Resource
win11-20240508-en
General
-
Target
Krotten Ransomware.zip
-
Size
26KB
-
MD5
ebb597a9b4761880fcf85714fca1c199
-
SHA1
d9cd11546400a9cac250f8df096d956e56e7acb3
-
SHA256
c2da6da5c0d092b3ba482b871ec5f5007bd3eb18be33ada4c733a1f894f0b573
-
SHA512
137944f3fe233f951270a29d0d0115435ab617833cdd7d0d5d1c4d20cb40e9ab8758136389013285efdc4ee6c7fc3457968a1325ba683ae99aa3d00b57008084
-
SSDEEP
768:L4FcZqc0pCe0zLMai34tqet7TPwqSyI8NsdFe:sm4wvzL2MvTwq6BdFe
Malware Config
Signatures
-
Disables RegEdit via registry modification 2 IoCs
description ioc Process Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" Trojan;Win32.Krotten.B.exe Set value (int) \REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" Trojan;Win32.Krotten.B.exe -
Disables Task Manager via registry modification
-
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\WINDOWS\\Web\\rundll32.exe" Trojan;Win32.Krotten.B.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\AVPCC = "C:\\WINDOWS\\Cursors\\avp.exe" Trojan;Win32.Krotten.B.exe -
Drops file in Windows directory 1 IoCs
description ioc Process File opened for modification C:\WINDOWS\Web Trojan;Win32.Krotten.B.exe -
Enumerates system info in registry 2 TTPs 3 IoCs
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS chrome.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName chrome.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer chrome.exe -
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Internet Explorer\Main\Window title = ":::::::::::::::::: ÌÎÉ ÕÓÉ ÏÐÎÒÓÕ À ÏÈÇÄÀ ÃÍÈÅÒ ::::::::::::::::::" Trojan;Win32.Krotten.B.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Internet Explorer\Main Trojan;Win32.Krotten.B.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Window title = ":::::::::::::::::: ÌÎÉ ÕÓÉ ÏÐÎÒÓÕ À ÏÈÇÄÀ ÃÍÈÅÒ ::::::::::::::::::" Trojan;Win32.Krotten.B.exe Key created \REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Internet Explorer\Main Trojan;Win32.Krotten.B.exe -
Modifies Internet Explorer start page 1 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\Start Page = "http://poetry.rotten.com/lightning/" Trojan;Win32.Krotten.B.exe Set value (str) \REGISTRY\USER\S-1-5-21-2457560273-69882387-977367775-1000\Software\Microsoft\Internet Explorer\Main\Start Page = "http://poetry.rotten.com/lightning/" Trojan;Win32.Krotten.B.exe -
Modifies data under HKEY_USERS 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-19\Software\Microsoft\Cryptography\TPM\Telemetry chrome.exe Set value (int) \REGISTRY\USER\S-1-5-19\Software\Microsoft\Cryptography\TPM\Telemetry\TraceTimeLast = "133633082743659658" chrome.exe -
Modifies registry class 1 IoCs
description ioc Process Key deleted \REGISTRY\MACHINE\SOFTWARE\CLASSES\REGFILE\SHELL\OPEN\COMMAND Trojan;Win32.Krotten.B.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1656 chrome.exe 1656 chrome.exe -
Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
pid Process 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe -
Suspicious use of AdjustPrivilegeToken 45 IoCs
description pid Process Token: SeSystemtimePrivilege 1220 Trojan;Win32.Krotten.B.exe Token: SeSystemtimePrivilege 1220 Trojan;Win32.Krotten.B.exe Token: SeSystemtimePrivilege 1220 Trojan;Win32.Krotten.B.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe Token: SeShutdownPrivilege 1656 chrome.exe Token: SeCreatePagefilePrivilege 1656 chrome.exe -
Suspicious use of FindShellTrayWindow 27 IoCs
pid Process 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe -
Suspicious use of SendNotifyMessage 12 IoCs
pid Process 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe 1656 chrome.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 1656 wrote to memory of 424 1656 chrome.exe 87 PID 1656 wrote to memory of 424 1656 chrome.exe 87 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 3880 1656 chrome.exe 88 PID 1656 wrote to memory of 2952 1656 chrome.exe 89 PID 1656 wrote to memory of 2952 1656 chrome.exe 89 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90 PID 1656 wrote to memory of 4084 1656 chrome.exe 90
Processes
-
C:\Windows\Explorer.exeC:\Windows\Explorer.exe /idlist,,"C:\Users\Admin\AppData\Local\Temp\Krotten Ransomware.zip"1⤵PID:1016
-
C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵PID:4608
-
C:\Users\Admin\Desktop\Trojan;Win32.Krotten.B.exe"C:\Users\Admin\Desktop\Trojan;Win32.Krotten.B.exe"1⤵
- Disables RegEdit via registry modification
- Adds Run key to start application
- Drops file in Windows directory
- Modifies Internet Explorer settings
- Modifies Internet Explorer start page
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
PID:1220
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe"1⤵
- Enumerates system info in registry
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1656 -
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=110.0.5481.104 --initial-client-data=0x100,0x104,0x108,0xdc,0x10c,0x7ffff651ab58,0x7ffff651ab68,0x7ffff651ab782⤵PID:424
-
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1660 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:22⤵PID:3880
-
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2112 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:82⤵PID:2952
-
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=2172 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:82⤵PID:4084
-
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=3048 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:12⤵PID:4848
-
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=3080 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:12⤵PID:1996
-
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --mojo-platform-channel-handle=4204 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:12⤵PID:4224
-
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4544 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:82⤵PID:1068
-
-
C:\Program Files\Google\Chrome\Application\chrome.exe"C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4540 --field-trial-handle=1736,i,3386479210045540524,4711546250691681374,131072 /prefetch:82⤵PID:2968
-
-
C:\Program Files\Google\Chrome\Application\110.0.5481.104\Installer\setup.exe"C:\Program Files\Google\Chrome\Application\110.0.5481.104\Installer\setup.exe" --reenable-autoupdates --system-level2⤵PID:1152
-
C:\Program Files\Google\Chrome\Application\110.0.5481.104\Installer\setup.exe"C:\Program Files\Google\Chrome\Application\110.0.5481.104\Installer\setup.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\TEMP\Crashpad --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=110.0.5481.104 --initial-client-data=0x25c,0x260,0x264,0x238,0x268,0x7ff7027aae48,0x7ff7027aae58,0x7ff7027aae683⤵PID:3380
-
-
-
C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"C:\Program Files\Google\Chrome\Application\110.0.5481.104\elevation_service.exe"1⤵PID:2648
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
809B
MD5139bd4dca641ca047fa9c212d7dd0272
SHA1b2ca7688927d4beb099372a9817eeb1599a2a33e
SHA2564e874831da4a0d0aaffbe6191ec3e8e5e325da7aa53adf501b934c1c2e81368c
SHA512ebffb8979da7845d2db1d066d43fef12f18f6789b0a4deceb85e97ce45200ea8af5512eb6aed08f3a6f0acf662abf66af21d04b341703bd99d0347b247843256
-
Filesize
2B
MD5d751713988987e9331980363e24189ce
SHA197d170e1550eee4afc0af065b78cda302a97674c
SHA2564f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945
SHA512b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af
-
Filesize
7KB
MD5d893c1845af41340781e33c467744cf6
SHA1292f73cfe7e503d8902bb5b2600ab2ba7c21ccfd
SHA25678311f871fb4830e850f712455155d58074a4b6762c4e2510c50f43dbd1391b0
SHA5120df0be008ba383344dd02e0b649d84917ba295b0290ea1945f8b8f619db1de8c90348671059b30b747d89c9c83e223c94d2c8207d6ae9051c63a13906c27a6a6
-
Filesize
129KB
MD5e39d3e6ba7b9652731d3de76526896c4
SHA190c97e6576d84e494d78035eb9d9fd5056f7a590
SHA256aee1782d81240bb50df0dceb169848abb27e4f3085bc99527a355e2b78138deb
SHA512710df56508db3fd487125079c237ebf60f0e8fc6630ee4824290d085712be4e26510e28ff675b8dd2c26edd359a443013a32a986b1fd63970443df1c5213c3c9
-
Filesize
129KB
MD54fb14f8838db0e34c6be357d8fd2b38f
SHA1642f9313f10281aae6a8cec2372ea44137844097
SHA25619702f953fc9b7a86c1c916fd50441a1aaf69a1eba36ca8a8a90b8cb42047b25
SHA51252b9833d393a3ca8aab6adc332dc42d3e7a2e986a1be17d56cc5dba53aa12c7bde7caf300ed80426a8b3a9b632ea14f414be176581ecdd6eb1601bf2cb30fc2a
-
Filesize
264KB
MD5f50f89a0a91564d0b8a211f8921aa7de
SHA1112403a17dd69d5b9018b8cede023cb3b54eab7d
SHA256b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec
SHA512bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58