Analysis
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max time kernel
108s -
max time network
126s -
platform
windows10_x64 -
resource
win10v20210410 -
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 behavioral2/memory/792-136-0x0000000000400000-0x000000000046A000-memory.dmp family_snakekeylogger behavioral2/memory/792-137-0x000000000046446E-mapping.dmp family_snakekeylogger behavioral2/memory/792-146-0x0000000004DE0000-0x00000000052DE000-memory.dmp family_snakekeylogger -
Downloads MZ/PE file
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Executes dropped EXE 2 IoCs
Processes:
370242676728.exe370242676728.exepid process 3740 370242676728.exe 792 370242676728.exe -
Loads dropped DLL 3 IoCs
Processes:
proforma invoice No. 42037,pdf.exepid process 2352 proforma invoice No. 42037,pdf.exe 2352 proforma invoice No. 42037,pdf.exe 2352 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 29 freegeoip.app 30 freegeoip.app 26 checkip.dyndns.org -
Suspicious use of SetThreadContext 2 IoCs
Processes:
proforma invoice No. 42037,pdf.exe370242676728.exedescription pid process target process PID 4044 set thread context of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 3740 set thread context of 792 3740 370242676728.exe 370242676728.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 2396 taskkill.exe -
NTFS ADS 1 IoCs
Processes:
proforma invoice No. 42037,pdf.exedescription ioc process File created C:\ProgramData\370242676728.exe:Zone.Identifier proforma invoice No. 42037,pdf.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
Processes:
370242676728.exepid process 792 370242676728.exe -
Suspicious use of AdjustPrivilegeToken 4 IoCs
Processes:
proforma invoice No. 42037,pdf.exe370242676728.exetaskkill.exe370242676728.exedescription pid process Token: SeDebugPrivilege 4044 proforma invoice No. 42037,pdf.exe Token: SeDebugPrivilege 3740 370242676728.exe Token: SeDebugPrivilege 2396 taskkill.exe Token: SeDebugPrivilege 792 370242676728.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
proforma invoice No. 42037,pdf.exeproforma invoice No. 42037,pdf.exe370242676728.execmd.exedescription pid process target process PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 4044 wrote to memory of 2352 4044 proforma invoice No. 42037,pdf.exe proforma invoice No. 42037,pdf.exe PID 2352 wrote to memory of 3740 2352 proforma invoice No. 42037,pdf.exe 370242676728.exe PID 2352 wrote to memory of 3740 2352 proforma invoice No. 42037,pdf.exe 370242676728.exe PID 2352 wrote to memory of 3740 2352 proforma invoice No. 42037,pdf.exe 370242676728.exe PID 2352 wrote to memory of 644 2352 proforma invoice No. 42037,pdf.exe cmd.exe PID 2352 wrote to memory of 644 2352 proforma invoice No. 42037,pdf.exe cmd.exe PID 2352 wrote to memory of 644 2352 proforma invoice No. 42037,pdf.exe cmd.exe PID 3740 wrote to memory of 792 3740 370242676728.exe 370242676728.exe PID 3740 wrote to memory of 792 3740 370242676728.exe 370242676728.exe PID 3740 wrote to memory of 792 3740 370242676728.exe 370242676728.exe PID 3740 wrote to memory of 792 3740 370242676728.exe 370242676728.exe PID 3740 wrote to memory of 792 3740 370242676728.exe 370242676728.exe PID 3740 wrote to memory of 792 3740 370242676728.exe 370242676728.exe PID 3740 wrote to memory of 792 3740 370242676728.exe 370242676728.exe PID 3740 wrote to memory of 792 3740 370242676728.exe 370242676728.exe PID 644 wrote to memory of 2396 644 cmd.exe taskkill.exe PID 644 wrote to memory of 2396 644 cmd.exe taskkill.exe PID 644 wrote to memory of 2396 644 cmd.exe taskkill.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\370242676728.exe"C:\ProgramData\370242676728.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\ProgramData\370242676728.exe"C:\ProgramData\370242676728.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 2352 & erase C:\Users\Admin\AppData\Local\Temp\proforma invoice No. 42037,pdf.exe & RD /S /Q C:\\ProgramData\\846427641882700\\* & exit3⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\taskkill.exetaskkill /pid 23524⤵
- 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\370242676728.exeMD5
ac0829f5ca89f48cfeab1868c40f763a
SHA109acf3a61a16b0c75ba3670b5349e27eccd55e95
SHA2561e4a969fd5191552a6dc7fb74d0ac4c1d06ed08e3c80440ca02c934857eb6f1e
SHA512ab58a276b33d646842cb0666b609ad3852007b97e9bbf3ec2a6f81217f350c3d0e788fa60f2ddc23d7495963429e473f9f40d8e0388e4234ba9330a10cc2d8ee
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C:\ProgramData\370242676728.exeMD5
ac0829f5ca89f48cfeab1868c40f763a
SHA109acf3a61a16b0c75ba3670b5349e27eccd55e95
SHA2561e4a969fd5191552a6dc7fb74d0ac4c1d06ed08e3c80440ca02c934857eb6f1e
SHA512ab58a276b33d646842cb0666b609ad3852007b97e9bbf3ec2a6f81217f350c3d0e788fa60f2ddc23d7495963429e473f9f40d8e0388e4234ba9330a10cc2d8ee
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C:\ProgramData\370242676728.exeMD5
ac0829f5ca89f48cfeab1868c40f763a
SHA109acf3a61a16b0c75ba3670b5349e27eccd55e95
SHA2561e4a969fd5191552a6dc7fb74d0ac4c1d06ed08e3c80440ca02c934857eb6f1e
SHA512ab58a276b33d646842cb0666b609ad3852007b97e9bbf3ec2a6f81217f350c3d0e788fa60f2ddc23d7495963429e473f9f40d8e0388e4234ba9330a10cc2d8ee
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C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\370242676728.exe.logMD5
bca5d9d288a7809c63f2d594cb7c7b94
SHA111689c8a592cd8706f0155b4574488dd872cbd97
SHA256d7a3ed9b26c989e840532a7f0fa21bc508f8fbcb2d37116fade84280f2a865ed
SHA512db30f307e6818573f06f115818476104abfce94f15d9ad11e8163aa3cc19cee4cc3c87c98ef45d5c978b6f166089cc0283e3cc9a5db8359a425c8da7039dae0d
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C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCookies\UH8X6ZQV.cookieMD5
8140368330fd1fb2cee0cf903e443aca
SHA13a1571fe8b060239e161e7c3a85e4f9d2c4586fc
SHA256b98a7f6c1d9a4da3b918a0b117199b2224c8602af99137e1353f4aa679fb44f0
SHA5129a27a3c061b228d86f999111677e80b76d2257dab60a2fad6e57224fd530d68936f688c65a1da611aa788f377eb9213f58804293de44c8839d7b616840083ff2
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\ProgramData\mozglue.dllMD5
8f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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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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memory/644-133-0x0000000000000000-mapping.dmp
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memory/792-137-0x000000000046446E-mapping.dmp
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memory/792-146-0x0000000004DE0000-0x00000000052DE000-memory.dmpFilesize
5.0MB
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memory/792-149-0x0000000006360000-0x0000000006361000-memory.dmpFilesize
4KB
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memory/792-136-0x0000000000400000-0x000000000046A000-memory.dmpFilesize
424KB
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memory/792-148-0x0000000006290000-0x0000000006291000-memory.dmpFilesize
4KB
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memory/792-147-0x00000000060C0000-0x00000000060C1000-memory.dmpFilesize
4KB
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memory/2352-120-0x000000000040717B-mapping.dmp
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memory/2352-119-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2352-122-0x0000000000400000-0x0000000000438000-memory.dmpFilesize
224KB
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memory/2396-140-0x0000000000000000-mapping.dmp
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memory/3740-126-0x0000000000000000-mapping.dmp
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memory/3740-129-0x00000000003F0000-0x00000000003F1000-memory.dmpFilesize
4KB
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memory/3740-134-0x0000000004CA0000-0x0000000004CA1000-memory.dmpFilesize
4KB
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memory/4044-114-0x0000000000680000-0x0000000000681000-memory.dmpFilesize
4KB
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memory/4044-116-0x0000000005450000-0x0000000005451000-memory.dmpFilesize
4KB
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memory/4044-117-0x0000000005E90000-0x0000000005EB1000-memory.dmpFilesize
132KB
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memory/4044-118-0x0000000005F60000-0x0000000005F61000-memory.dmpFilesize
4KB
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memory/4044-121-0x0000000004F50000-0x000000000544E000-memory.dmpFilesize
5.0MB