Analysis
-
max time kernel
48s -
max time network
52s -
platform
windows7_x64 -
resource
win7-20220715-en -
resource tags
arch:x64arch:x86image:win7-20220715-enlocale:en-usos:windows7-x64system -
submitted
25-07-2022 15:52
Static task
static1
Behavioral task
behavioral1
Sample
42601ff8d41599bb0a61bed4bddc468c.exe
Resource
win7-20220715-en
Behavioral task
behavioral2
Sample
42601ff8d41599bb0a61bed4bddc468c.exe
Resource
win10v2004-20220721-en
General
-
Target
42601ff8d41599bb0a61bed4bddc468c.exe
-
Size
882KB
-
MD5
42601ff8d41599bb0a61bed4bddc468c
-
SHA1
73ca2dd8e1a2d000447dfc3ea6cd3c84eb7f3490
-
SHA256
a96d0e16ff2f1bb99d82f6232b48e8d40d879906a0dd2870985359d19e82ff6e
-
SHA512
011e2c2c5fee106c35cd9a764b37da79f459b6488c5d1ca12f9001666e8d0547d08948f4a7dec219ae5090644f3db87b9817939976e002a55cbf7c4b9665834c
Malware Config
Extracted
oski
ra.adriansbruce.com
Signatures
-
Oski
Oski is an infostealer targeting browser data, crypto wallets.
-
Downloads MZ/PE file
-
Deletes itself 1 IoCs
Processes:
cmd.exepid process 1288 cmd.exe -
Loads dropped DLL 3 IoCs
Processes:
42601ff8d41599bb0a61bed4bddc468c.exepid process 1480 42601ff8d41599bb0a61bed4bddc468c.exe 1480 42601ff8d41599bb0a61bed4bddc468c.exe 1480 42601ff8d41599bb0a61bed4bddc468c.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
-
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
-
Suspicious use of SetThreadContext 1 IoCs
Processes:
42601ff8d41599bb0a61bed4bddc468c.exedescription pid process target process PID 852 set thread context of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
-
Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
42601ff8d41599bb0a61bed4bddc468c.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString 42601ff8d41599bb0a61bed4bddc468c.exe -
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
-
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 1220 taskkill.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
42601ff8d41599bb0a61bed4bddc468c.exetaskkill.exedescription pid process Token: SeDebugPrivilege 852 42601ff8d41599bb0a61bed4bddc468c.exe Token: SeDebugPrivilege 1220 taskkill.exe -
Suspicious use of WriteProcessMemory 22 IoCs
Processes:
42601ff8d41599bb0a61bed4bddc468c.exe42601ff8d41599bb0a61bed4bddc468c.execmd.exedescription pid process target process PID 852 wrote to memory of 964 852 42601ff8d41599bb0a61bed4bddc468c.exe schtasks.exe PID 852 wrote to memory of 964 852 42601ff8d41599bb0a61bed4bddc468c.exe schtasks.exe PID 852 wrote to memory of 964 852 42601ff8d41599bb0a61bed4bddc468c.exe schtasks.exe PID 852 wrote to memory of 964 852 42601ff8d41599bb0a61bed4bddc468c.exe schtasks.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 852 wrote to memory of 1480 852 42601ff8d41599bb0a61bed4bddc468c.exe 42601ff8d41599bb0a61bed4bddc468c.exe PID 1480 wrote to memory of 1288 1480 42601ff8d41599bb0a61bed4bddc468c.exe cmd.exe PID 1480 wrote to memory of 1288 1480 42601ff8d41599bb0a61bed4bddc468c.exe cmd.exe PID 1480 wrote to memory of 1288 1480 42601ff8d41599bb0a61bed4bddc468c.exe cmd.exe PID 1480 wrote to memory of 1288 1480 42601ff8d41599bb0a61bed4bddc468c.exe cmd.exe PID 1288 wrote to memory of 1220 1288 cmd.exe taskkill.exe PID 1288 wrote to memory of 1220 1288 cmd.exe taskkill.exe PID 1288 wrote to memory of 1220 1288 cmd.exe taskkill.exe PID 1288 wrote to memory of 1220 1288 cmd.exe taskkill.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\42601ff8d41599bb0a61bed4bddc468c.exe"C:\Users\Admin\AppData\Local\Temp\42601ff8d41599bb0a61bed4bddc468c.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\YwgdZptl" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7FCB.tmp"2⤵
- Creates scheduled task(s)
-
C:\Users\Admin\AppData\Local\Temp\42601ff8d41599bb0a61bed4bddc468c.exe"{path}"2⤵
- Loads dropped DLL
- Checks processor information in registry
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /pid 1480 & erase C:\Users\Admin\AppData\Local\Temp\42601ff8d41599bb0a61bed4bddc468c.exe & RD /S /Q C:\\ProgramData\\171472350344450\\* & exit3⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\taskkill.exetaskkill /pid 14804⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\tmp7FCB.tmpFilesize
1KB
MD5e6c2121bd5089ddaeaf753803c3c7192
SHA18305e524165827413694de859bf8ec7fb3a44c47
SHA256d40c023ffcf73b2ac1111e4dc4fcc5fabe5ecf1556d2ed3bfc139ff6f341d797
SHA5124d0ae4875d428d304b9e96c648c5bf0bd76347bc2cce530513b1a06a74531d732f63e00a02bcf82ac6c59304c9c8a35ac4a515b0f8943d58478f670bdaca79da
-
\ProgramData\mozglue.dllFilesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
-
\ProgramData\nss3.dllFilesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
-
\ProgramData\sqlite3.dllFilesize
630KB
MD5e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
-
memory/852-72-0x0000000074610000-0x0000000074BBB000-memory.dmpFilesize
5.7MB
-
memory/852-55-0x0000000074610000-0x0000000074BBB000-memory.dmpFilesize
5.7MB
-
memory/852-56-0x0000000074610000-0x0000000074BBB000-memory.dmpFilesize
5.7MB
-
memory/852-54-0x0000000076021000-0x0000000076023000-memory.dmpFilesize
8KB
-
memory/964-57-0x0000000000000000-mapping.dmp
-
memory/1220-80-0x0000000000000000-mapping.dmp
-
memory/1288-78-0x0000000000000000-mapping.dmp
-
memory/1480-59-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/1480-71-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/1480-69-0x000000000040717B-mapping.dmp
-
memory/1480-74-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/1480-68-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/1480-66-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/1480-64-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/1480-62-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/1480-79-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
-
memory/1480-60-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB