Analysis
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max time kernel
138s -
max time network
137s -
platform
windows7_x64 -
resource
win7v20210410 -
submitted
05-05-2021 10:10
Static task
static1
Behavioral task
behavioral1
Sample
proforma invoice No. 42037,pdf.exe
Resource
win7v20210410
Behavioral task
behavioral2
Sample
proforma invoice No. 42037,pdf.exe
Resource
win10v20210410
General
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Target
proforma invoice No. 42037,pdf.exe
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Size
31KB
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MD5
1fc85b87347785b556af1d0f47a1f928
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SHA1
c39c80b549f7dc46bfe18d5b956a4a17b28bac78
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SHA256
a3ef4500e9f5f2447d55de102e2529a62b48f644b03d22199ce5c69c0ca57c88
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SHA512
2c13b8f8e8845ed9ad2c5718a1fdbe16da06106b54cca04d8f978c0d15c1af8e90b900900e4b1c325e995ef5799101eee9edc182fc17c92dc33ecab478ac490c
Malware Config
Extracted
oski
203.159.80.72
Extracted
snakekeylogger
https://api.telegram.org/bot1761516426:AAE3Juu_v6fG9Gy1S33LdTvyz85ua-duZsk/sendMessage?chat_id=1727399585
Signatures
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Oski
Oski is an infostealer targeting browser data, crypto wallets.
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Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
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Snake Keylogger Payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1300-83-0x0000000000400000-0x000000000046A000-memory.dmp family_snakekeylogger behavioral1/memory/1300-84-0x000000000046446E-mapping.dmp family_snakekeylogger behavioral1/memory/1300-86-0x0000000000400000-0x000000000046A000-memory.dmp family_snakekeylogger -
Downloads MZ/PE file
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Executes dropped EXE 3 IoCs
Processes:
922390449311.exe922390449311.exe922390449311.exepid process 432 922390449311.exe 1176 922390449311.exe 1300 922390449311.exe -
Loads dropped DLL 6 IoCs
Processes:
proforma invoice No. 42037,pdf.exepid process 316 proforma invoice No. 42037,pdf.exe 316 proforma invoice No. 42037,pdf.exe 316 proforma invoice No. 42037,pdf.exe 316 proforma invoice No. 42037,pdf.exe 316 proforma invoice No. 42037,pdf.exe 316 proforma invoice No. 42037,pdf.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 14 checkip.dyndns.org 17 freegeoip.app 18 freegeoip.app -
Suspicious use of SetThreadContext 2 IoCs
Processes:
proforma invoice No. 42037,pdf.exe922390449311.exedescription pid process target process PID 1888 set thread context of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 432 set thread context of 1300 432 922390449311.exe 922390449311.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.
Processes:
proforma invoice No. 42037,pdf.exedescription ioc process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString proforma invoice No. 42037,pdf.exe -
Kills process with taskkill 1 IoCs
Processes:
taskkill.exepid process 1756 taskkill.exe -
NTFS ADS 1 IoCs
Processes:
proforma invoice No. 42037,pdf.exedescription ioc process File created C:\ProgramData\922390449311.exe:Zone.Identifier proforma invoice No. 42037,pdf.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
922390449311.exe922390449311.exepid process 432 922390449311.exe 432 922390449311.exe 1300 922390449311.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
proforma invoice No. 42037,pdf.exe922390449311.exetaskkill.exe922390449311.exedescription pid process Token: SeDebugPrivilege 1888 proforma invoice No. 42037,pdf.exe Token: SeDebugPrivilege 432 922390449311.exe Token: SeDebugPrivilege 1756 taskkill.exe Token: SeDebugPrivilege 1300 922390449311.exe -
Suspicious use of WriteProcessMemory 35 IoCs
Processes:
proforma invoice No. 42037,pdf.exeproforma invoice No. 42037,pdf.execmd.exe922390449311.exedescription pid process target process PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 1888 wrote to memory of 316 1888 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 316 wrote to memory of 432 316 proforma invoice No. 42037,pdf.exe 922390449311.exe PID 316 wrote to memory of 432 316 proforma invoice No. 42037,pdf.exe 922390449311.exe PID 316 wrote to memory of 432 316 proforma invoice No. 42037,pdf.exe 922390449311.exe PID 316 wrote to memory of 432 316 proforma invoice No. 42037,pdf.exe 922390449311.exe PID 316 wrote to memory of 1088 316 proforma invoice No. 42037,pdf.exe cmd.exe PID 316 wrote to memory of 1088 316 proforma invoice No. 42037,pdf.exe cmd.exe PID 316 wrote to memory of 1088 316 proforma invoice No. 42037,pdf.exe cmd.exe PID 316 wrote to memory of 1088 316 proforma invoice No. 42037,pdf.exe cmd.exe PID 1088 wrote to memory of 1756 1088 cmd.exe taskkill.exe PID 1088 wrote to memory of 1756 1088 cmd.exe taskkill.exe PID 1088 wrote to memory of 1756 1088 cmd.exe taskkill.exe PID 1088 wrote to memory of 1756 1088 cmd.exe taskkill.exe PID 432 wrote to memory of 1176 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1176 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1176 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1176 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe PID 432 wrote to memory of 1300 432 922390449311.exe 922390449311.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\proforma invoice No. 42037,pdf.exe"C:\Users\Admin\AppData\Local\Temp\proforma invoice No. 42037,pdf.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\proforma invoice No. 42037,pdf.exe"C:\Users\Admin\AppData\Local\Temp\proforma invoice No. 42037,pdf.exe"2⤵
- Loads dropped DLL
- Checks processor information in registry
- NTFS ADS
- Suspicious use of WriteProcessMemory
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C:\ProgramData\922390449311.exe"C:\ProgramData\922390449311.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\ProgramData\922390449311.exe"C:\ProgramData\922390449311.exe"4⤵
- Executes dropped EXE
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C:\ProgramData\922390449311.exe"C:\ProgramData\922390449311.exe"4⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /pid 316 & erase C:\Users\Admin\AppData\Local\Temp\proforma invoice No. 42037,pdf.exe & RD /S /Q C:\\ProgramData\\426228921058018\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 3164⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\ProgramData\922390449311.exeMD5
ac0829f5ca89f48cfeab1868c40f763a
SHA109acf3a61a16b0c75ba3670b5349e27eccd55e95
SHA2561e4a969fd5191552a6dc7fb74d0ac4c1d06ed08e3c80440ca02c934857eb6f1e
SHA512ab58a276b33d646842cb0666b609ad3852007b97e9bbf3ec2a6f81217f350c3d0e788fa60f2ddc23d7495963429e473f9f40d8e0388e4234ba9330a10cc2d8ee
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C:\ProgramData\922390449311.exeMD5
ac0829f5ca89f48cfeab1868c40f763a
SHA109acf3a61a16b0c75ba3670b5349e27eccd55e95
SHA2561e4a969fd5191552a6dc7fb74d0ac4c1d06ed08e3c80440ca02c934857eb6f1e
SHA512ab58a276b33d646842cb0666b609ad3852007b97e9bbf3ec2a6f81217f350c3d0e788fa60f2ddc23d7495963429e473f9f40d8e0388e4234ba9330a10cc2d8ee
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C:\ProgramData\922390449311.exeMD5
ac0829f5ca89f48cfeab1868c40f763a
SHA109acf3a61a16b0c75ba3670b5349e27eccd55e95
SHA2561e4a969fd5191552a6dc7fb74d0ac4c1d06ed08e3c80440ca02c934857eb6f1e
SHA512ab58a276b33d646842cb0666b609ad3852007b97e9bbf3ec2a6f81217f350c3d0e788fa60f2ddc23d7495963429e473f9f40d8e0388e4234ba9330a10cc2d8ee
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C:\ProgramData\922390449311.exeMD5
ac0829f5ca89f48cfeab1868c40f763a
SHA109acf3a61a16b0c75ba3670b5349e27eccd55e95
SHA2561e4a969fd5191552a6dc7fb74d0ac4c1d06ed08e3c80440ca02c934857eb6f1e
SHA512ab58a276b33d646842cb0666b609ad3852007b97e9bbf3ec2a6f81217f350c3d0e788fa60f2ddc23d7495963429e473f9f40d8e0388e4234ba9330a10cc2d8ee
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C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Cookies\RI06KNDN.txtMD5
0e9367300ee08436c817124ef3729cda
SHA1f23e26103015b4605755c6eb77ab5e8e9b720e34
SHA256982c6fc3a17a685f7e372867a70b93c0c175aef7cf107950f44f54e1ee49c8b9
SHA512578e6c409c8ccf840eb3fac7f3fe0f963bf9ac9c487f6e66431e296b0e7dc61b70119a83d65b59ad09981b568f9a0613cd10eba25558bf01a9e9039cb3cb72c1
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\ProgramData\922390449311.exeMD5
ac0829f5ca89f48cfeab1868c40f763a
SHA109acf3a61a16b0c75ba3670b5349e27eccd55e95
SHA2561e4a969fd5191552a6dc7fb74d0ac4c1d06ed08e3c80440ca02c934857eb6f1e
SHA512ab58a276b33d646842cb0666b609ad3852007b97e9bbf3ec2a6f81217f350c3d0e788fa60f2ddc23d7495963429e473f9f40d8e0388e4234ba9330a10cc2d8ee
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\ProgramData\mozglue.dllMD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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\ProgramData\msvcp140.dllMD5
109f0f02fd37c84bfc7508d4227d7ed5
SHA1ef7420141bb15ac334d3964082361a460bfdb975
SHA256334e69ac9367f708ce601a6f490ff227d6c20636da5222f148b25831d22e13d4
SHA51246eb62b65817365c249b48863d894b4669e20fcb3992e747cd5c9fdd57968e1b2cf7418d1c9340a89865eadda362b8db51947eb4427412eb83b35994f932fd39
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\ProgramData\nss3.dllMD5
bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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\ProgramData\sqlite3.dllMD5
e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
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\ProgramData\vcruntime140.dllMD5
7587bf9cb4147022cd5681b015183046
SHA1f2106306a8f6f0da5afb7fc765cfa0757ad5a628
SHA256c40bb03199a2054dabfc7a8e01d6098e91de7193619effbd0f142a7bf031c14d
SHA5120b63e4979846ceba1b1ed8470432ea6aa18cca66b5f5322d17b14bc0dfa4b2ee09ca300a016e16a01db5123e4e022820698f46d9bad1078bd24675b4b181e91f
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memory/316-63-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/316-66-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/316-65-0x0000000075161000-0x0000000075163000-memory.dmpFilesize
8KB
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memory/316-64-0x000000000040717B-mapping.dmp
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memory/432-73-0x0000000000000000-mapping.dmp
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memory/432-76-0x0000000000E90000-0x0000000000E91000-memory.dmpFilesize
4KB
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memory/432-80-0x0000000004640000-0x0000000004641000-memory.dmpFilesize
4KB
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memory/1088-78-0x0000000000000000-mapping.dmp
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memory/1300-83-0x0000000000400000-0x000000000046A000-memory.dmpFilesize
424KB
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memory/1300-84-0x000000000046446E-mapping.dmp
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memory/1300-86-0x0000000000400000-0x000000000046A000-memory.dmpFilesize
424KB
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memory/1300-88-0x0000000004320000-0x0000000004321000-memory.dmpFilesize
4KB
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memory/1756-79-0x0000000000000000-mapping.dmp
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memory/1888-59-0x0000000000190000-0x0000000000191000-memory.dmpFilesize
4KB
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memory/1888-62-0x0000000000530000-0x0000000000551000-memory.dmpFilesize
132KB
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memory/1888-61-0x0000000004D10000-0x0000000004D11000-memory.dmpFilesize
4KB