Analysis
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max time kernel
54s -
max time network
143s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
24/12/2022, 08:35
Static task
static1
Behavioral task
behavioral1
Sample
4525da518da4d8644df5834756776c7b.exe
Resource
win7-20221111-en
Behavioral task
behavioral2
Sample
4525da518da4d8644df5834756776c7b.exe
Resource
win10v2004-20220812-en
General
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Target
4525da518da4d8644df5834756776c7b.exe
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Size
744KB
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MD5
4525da518da4d8644df5834756776c7b
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SHA1
677d891e6194e9016e46e1357a81c525a07267ff
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SHA256
58ffdedad7310d83d66e0ac607d7bd7271be5308adfa48c1a54447bd5c692ff1
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SHA512
b4017e7e9c1db5dfc28594e5681daa5ae0ebabefd248486fc5d1f8f8478021656d0ec5fb566354e383aa5eed295762ca28cf12d88c32c574a44f6b49ad7473ca
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SSDEEP
12288:PcTvfrgC66FgkHcl/prjQYHNpa0o+fQNAfWO3/X16cMd+5KGnOClX/BEfaSpwY:SIFDQ8ip+uO3/X1GiOUX/miST
Malware Config
Extracted
djvu
http://ex3mall.com/test1/get.php
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extension
.isal
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offline_id
m3KmScxfDyEQzJYP8qjOSfP4FvpsOXlekGuMPzt1
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payload_url
http://uaery.top/dl/build2.exe
http://ex3mall.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 10 IoCs
resource yara_rule behavioral2/memory/1624-133-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1624-134-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/960-137-0x0000000002210000-0x000000000232B000-memory.dmp family_djvu behavioral2/memory/1624-136-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1624-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1624-142-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3116-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3116-147-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3116-148-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3116-168-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 4 IoCs
pid Process 4708 build2.exe 4492 build3.exe 4672 build2.exe 1956 mstsca.exe -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 4525da518da4d8644df5834756776c7b.exe Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 4525da518da4d8644df5834756776c7b.exe Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation build2.exe -
Loads dropped DLL 2 IoCs
pid Process 4672 build2.exe 4672 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4224 icacls.exe -
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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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6f04ad72-7df6-4f0c-aec5-897c20600851\\4525da518da4d8644df5834756776c7b.exe\" --AutoStart" 4525da518da4d8644df5834756776c7b.exe -
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.
flow ioc 7 api.2ip.ua 8 api.2ip.ua 42 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 960 set thread context of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 3808 set thread context of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 4708 set thread context of 4672 4708 build2.exe 95 -
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 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 2640 schtasks.exe 2576 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 4276 timeout.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1624 4525da518da4d8644df5834756776c7b.exe 1624 4525da518da4d8644df5834756776c7b.exe 3116 4525da518da4d8644df5834756776c7b.exe 3116 4525da518da4d8644df5834756776c7b.exe 4672 build2.exe 4672 build2.exe -
Suspicious use of WriteProcessMemory 53 IoCs
description pid Process procid_target PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 960 wrote to memory of 1624 960 4525da518da4d8644df5834756776c7b.exe 79 PID 1624 wrote to memory of 4224 1624 4525da518da4d8644df5834756776c7b.exe 84 PID 1624 wrote to memory of 4224 1624 4525da518da4d8644df5834756776c7b.exe 84 PID 1624 wrote to memory of 4224 1624 4525da518da4d8644df5834756776c7b.exe 84 PID 1624 wrote to memory of 3808 1624 4525da518da4d8644df5834756776c7b.exe 85 PID 1624 wrote to memory of 3808 1624 4525da518da4d8644df5834756776c7b.exe 85 PID 1624 wrote to memory of 3808 1624 4525da518da4d8644df5834756776c7b.exe 85 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3808 wrote to memory of 3116 3808 4525da518da4d8644df5834756776c7b.exe 90 PID 3116 wrote to memory of 4708 3116 4525da518da4d8644df5834756776c7b.exe 91 PID 3116 wrote to memory of 4708 3116 4525da518da4d8644df5834756776c7b.exe 91 PID 3116 wrote to memory of 4708 3116 4525da518da4d8644df5834756776c7b.exe 91 PID 3116 wrote to memory of 4492 3116 4525da518da4d8644df5834756776c7b.exe 92 PID 3116 wrote to memory of 4492 3116 4525da518da4d8644df5834756776c7b.exe 92 PID 3116 wrote to memory of 4492 3116 4525da518da4d8644df5834756776c7b.exe 92 PID 4492 wrote to memory of 2576 4492 build3.exe 93 PID 4492 wrote to memory of 2576 4492 build3.exe 93 PID 4492 wrote to memory of 2576 4492 build3.exe 93 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4708 wrote to memory of 4672 4708 build2.exe 95 PID 4672 wrote to memory of 1676 4672 build2.exe 96 PID 4672 wrote to memory of 1676 4672 build2.exe 96 PID 4672 wrote to memory of 1676 4672 build2.exe 96 PID 1676 wrote to memory of 4276 1676 cmd.exe 98 PID 1676 wrote to memory of 4276 1676 cmd.exe 98 PID 1676 wrote to memory of 4276 1676 cmd.exe 98 PID 1956 wrote to memory of 2640 1956 mstsca.exe 100 PID 1956 wrote to memory of 2640 1956 mstsca.exe 100 PID 1956 wrote to memory of 2640 1956 mstsca.exe 100
Processes
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C:\Users\Admin\AppData\Local\Temp\4525da518da4d8644df5834756776c7b.exe"C:\Users\Admin\AppData\Local\Temp\4525da518da4d8644df5834756776c7b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:960 -
C:\Users\Admin\AppData\Local\Temp\4525da518da4d8644df5834756776c7b.exe"C:\Users\Admin\AppData\Local\Temp\4525da518da4d8644df5834756776c7b.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1624 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\6f04ad72-7df6-4f0c-aec5-897c20600851" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4224
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C:\Users\Admin\AppData\Local\Temp\4525da518da4d8644df5834756776c7b.exe"C:\Users\Admin\AppData\Local\Temp\4525da518da4d8644df5834756776c7b.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3808 -
C:\Users\Admin\AppData\Local\Temp\4525da518da4d8644df5834756776c7b.exe"C:\Users\Admin\AppData\Local\Temp\4525da518da4d8644df5834756776c7b.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3116 -
C:\Users\Admin\AppData\Local\b1d758ac-cdbd-4f6b-9f3e-5edbf157fa7e\build2.exe"C:\Users\Admin\AppData\Local\b1d758ac-cdbd-4f6b-9f3e-5edbf157fa7e\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4708 -
C:\Users\Admin\AppData\Local\b1d758ac-cdbd-4f6b-9f3e-5edbf157fa7e\build2.exe"C:\Users\Admin\AppData\Local\b1d758ac-cdbd-4f6b-9f3e-5edbf157fa7e\build2.exe"6⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4672 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\b1d758ac-cdbd-4f6b-9f3e-5edbf157fa7e\build2.exe" & exit7⤵
- Suspicious use of WriteProcessMemory
PID:1676 -
C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:4276
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C:\Users\Admin\AppData\Local\b1d758ac-cdbd-4f6b-9f3e-5edbf157fa7e\build3.exe"C:\Users\Admin\AppData\Local\b1d758ac-cdbd-4f6b-9f3e-5edbf157fa7e\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:4492 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"6⤵
- Creates scheduled task(s)
PID:2576
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1956 -
C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"2⤵
- Creates scheduled task(s)
PID:2640
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
133KB
MD58f73c08a9660691143661bf7332c3c27
SHA137fa65dd737c50fda710fdbde89e51374d0c204a
SHA2563fe6b1c54b8cf28f571e0c5d6636b4069a8ab00b4f11dd842cfec00691d0c9cd
SHA5120042ecf9b3571bb5eba2de893e8b2371df18f7c5a589f52ee66e4bfbaa15a5b8b7cc6a155792aaa8988528c27196896d5e82e1751c998bacea0d92395f66ad89
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Filesize
1.2MB
MD5bfac4e3c5908856ba17d41edcd455a51
SHA18eec7e888767aa9e4cca8ff246eb2aacb9170428
SHA256e2935b5b28550d47dc971f456d6961f20d1633b4892998750140e0eaa9ae9d78
SHA5122565bab776c4d732ffb1f9b415992a4c65b81bcd644a9a1df1333a269e322925fc1df4f76913463296efd7c88ef194c3056de2f1ca1357d7b5fe5ff0da877a66
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD5d725336098482e86274e5930393506a1
SHA17cb24085418693dc0c0fc876b6f7d2d400a7c256
SHA256a2550a47e8dee78c170ecdfc8918137469b6115cf32fedc091b80c7dea2701a1
SHA512f67ff810c97f14f9704439a7a3d34588b013eedc97149298c833926bc92d12b1e76b68c684863f86f8dede7fc677139f6c8af8e83bd43cad965ed32bda15ed3f
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD5bae107243c3c1cc23eb066f981b79948
SHA1ed066a4326ae4eb5db4b00b0bb0290f006ad456c
SHA2567d2ba9f4e363368512dc2388d792c3f971d18699234c4edab57ddd4053870026
SHA51267a0ba993ab7abab0973683f134d71ed96cbff33368b222fc84e57def50c57d1c6d1c64362738baa9efa8cd84a3ccee30cc67284b2cd8ea53cbb8d1bfed94764
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD5fcde1bbc175e566ed41a0eadd4f1f973
SHA1cd93bc829eb28d505b8c04d5a7c7fffff1425ab5
SHA25675cf4b2facb532b301e1b93a67876ab9b4b1771023ee2b0391e0a959ed644d6e
SHA51231d9cded7d11a0cf315fe56dee17fa46c2d5bd4d6c53099cbcf1fdabd1d64e327d5d57bdfb47f595d7454a4fc95b3d2e328cb5ac7858fbc829d5e2a08c32ad2d
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD5219dab0fe017b3c56fb5af83309fe37d
SHA1ac9e9d0da8c78d31694beea0482c823411b23878
SHA256e153ec3eccd03fd55894dc8d99ffdf6f4fcab4728929397be000daf59620cd4a
SHA51226c4869f0a02b5c2a2e326e5c97e3ed49f5c1218e8cc9a7cc2bb08a430f376c640f24a69e5141de3de215534ac509cb4067e5bdac33beefde3606d40373db367
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C:\Users\Admin\AppData\Local\6f04ad72-7df6-4f0c-aec5-897c20600851\4525da518da4d8644df5834756776c7b.exe
Filesize744KB
MD54525da518da4d8644df5834756776c7b
SHA1677d891e6194e9016e46e1357a81c525a07267ff
SHA25658ffdedad7310d83d66e0ac607d7bd7271be5308adfa48c1a54447bd5c692ff1
SHA512b4017e7e9c1db5dfc28594e5681daa5ae0ebabefd248486fc5d1f8f8478021656d0ec5fb566354e383aa5eed295762ca28cf12d88c32c574a44f6b49ad7473ca
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Filesize
409KB
MD5a131064868de7468d2e768211431401b
SHA1381ad582f72b30b4764afe0a817569b384be65a2
SHA256027bcfc4c5b4a06371e94f4a6b5f69cbee5bcad651d91115132844a2c10885a1
SHA51240fc84899d7bed5c49980f984e3c1446dece3861e5e107fa71e1876f4b778aa8369f03422a971d144f8e65f62a109f53ba94e86bc6ddec478d1bc71f3bb29309
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Filesize
409KB
MD5a131064868de7468d2e768211431401b
SHA1381ad582f72b30b4764afe0a817569b384be65a2
SHA256027bcfc4c5b4a06371e94f4a6b5f69cbee5bcad651d91115132844a2c10885a1
SHA51240fc84899d7bed5c49980f984e3c1446dece3861e5e107fa71e1876f4b778aa8369f03422a971d144f8e65f62a109f53ba94e86bc6ddec478d1bc71f3bb29309
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Filesize
409KB
MD5a131064868de7468d2e768211431401b
SHA1381ad582f72b30b4764afe0a817569b384be65a2
SHA256027bcfc4c5b4a06371e94f4a6b5f69cbee5bcad651d91115132844a2c10885a1
SHA51240fc84899d7bed5c49980f984e3c1446dece3861e5e107fa71e1876f4b778aa8369f03422a971d144f8e65f62a109f53ba94e86bc6ddec478d1bc71f3bb29309
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a