Analysis
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max time kernel
142s -
max time network
137s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
09-09-2022 09:23
Static task
static1
Behavioral task
behavioral1
Sample
5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe
Resource
win10v2004-20220812-en
General
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Target
5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe
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Size
724KB
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MD5
da2bd243d9b4d03f81edd0c339031299
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SHA1
57d45114484ce1f8801bbbd3ae1b4ebdeb20c1dc
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SHA256
5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8
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SHA512
7b0b5385b0062b8b4e9b455f4dc4917317dcad30c38da3b4c4b1857c19ffdb5b4f9a9f1e647295e0891c81331bdbfba878d3f52ef9378f03a9c06eca1504899e
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SSDEEP
12288:/vTd0NaAYNy0n3wziSwLgZY0xkY6OjPOghu4Pny87Nli7iGkvxTJs4Jr:/LCNaAYn3KZAOj2xGnr7Nli7ih5FsU
Malware Config
Extracted
djvu
http://acacaca.org/test3/get.php
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extension
.mmvb
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offline_id
yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/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 behavioral1/memory/628-133-0x0000000004A50000-0x0000000004B6B000-memory.dmp family_djvu behavioral1/memory/2124-135-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2124-136-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2124-137-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2124-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2124-142-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3224-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3224-147-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3224-152-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3224-156-0x0000000000400000-0x0000000000537000-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 2 IoCs
pid Process 2136 build2.exe 1368 build2.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 build2.exe Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe Key value queried \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe -
Loads dropped DLL 3 IoCs
pid Process 1368 build2.exe 1368 build2.exe 1368 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1644 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\\1f1eada8-7a6d-41d5-b069-236c6aa2db9d\\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe\" --AutoStart" 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.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 25 api.2ip.ua 26 api.2ip.ua 31 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 628 set thread context of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 2572 set thread context of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2136 set thread context of 1368 2136 build2.exe 106 -
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 opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 2344 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 2788 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 2124 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 2124 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 3224 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 3224 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 1368 build2.exe 1368 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2788 taskkill.exe -
Suspicious use of WriteProcessMemory 47 IoCs
description pid Process procid_target PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 628 wrote to memory of 2124 628 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 84 PID 2124 wrote to memory of 1644 2124 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 86 PID 2124 wrote to memory of 1644 2124 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 86 PID 2124 wrote to memory of 1644 2124 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 86 PID 2124 wrote to memory of 2572 2124 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 87 PID 2124 wrote to memory of 2572 2124 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 87 PID 2124 wrote to memory of 2572 2124 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 87 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 2572 wrote to memory of 3224 2572 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 90 PID 3224 wrote to memory of 2136 3224 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 93 PID 3224 wrote to memory of 2136 3224 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 93 PID 3224 wrote to memory of 2136 3224 5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe 93 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 2136 wrote to memory of 1368 2136 build2.exe 106 PID 1368 wrote to memory of 2192 1368 build2.exe 107 PID 1368 wrote to memory of 2192 1368 build2.exe 107 PID 1368 wrote to memory of 2192 1368 build2.exe 107 PID 2192 wrote to memory of 2788 2192 cmd.exe 109 PID 2192 wrote to memory of 2788 2192 cmd.exe 109 PID 2192 wrote to memory of 2788 2192 cmd.exe 109 PID 2192 wrote to memory of 2344 2192 cmd.exe 111 PID 2192 wrote to memory of 2344 2192 cmd.exe 111 PID 2192 wrote to memory of 2344 2192 cmd.exe 111
Processes
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C:\Users\Admin\AppData\Local\Temp\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe"C:\Users\Admin\AppData\Local\Temp\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:628 -
C:\Users\Admin\AppData\Local\Temp\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe"C:\Users\Admin\AppData\Local\Temp\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2124 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\1f1eada8-7a6d-41d5-b069-236c6aa2db9d" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1644
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C:\Users\Admin\AppData\Local\Temp\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe"C:\Users\Admin\AppData\Local\Temp\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2572 -
C:\Users\Admin\AppData\Local\Temp\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe"C:\Users\Admin\AppData\Local\Temp\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3224 -
C:\Users\Admin\AppData\Local\1c9ca88e-a2e3-4ea4-973d-985e741a1df7\build2.exe"C:\Users\Admin\AppData\Local\1c9ca88e-a2e3-4ea4-973d-985e741a1df7\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2136 -
C:\Users\Admin\AppData\Local\1c9ca88e-a2e3-4ea4-973d-985e741a1df7\build2.exe"C:\Users\Admin\AppData\Local\1c9ca88e-a2e3-4ea4-973d-985e741a1df7\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:1368 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im build2.exe /f & timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\1c9ca88e-a2e3-4ea4-973d-985e741a1df7\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:2192 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2788
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:2344
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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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Filesize
630KB
MD5e477a96c8f2b18d6b5c27bde49c990bf
SHA1e980c9bf41330d1e5bd04556db4646a0210f7409
SHA25616574f51785b0e2fc29c2c61477eb47bb39f714829999511dc8952b43ab17660
SHA512335a86268e7c0e568b1c30981ec644e6cd332e66f96d2551b58a82515316693c1859d87b4f4b7310cf1ac386cee671580fdd999c3bcb23acf2c2282c01c8798c
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD5215064dd8b4566627489319b46e9ca43
SHA17fa698eef5f02a961b5862df135d7ebfd8a12292
SHA256390f76fdb79029603900524df2f0fbfd05bf18a3bbc74b9b05b2a6dc5938393c
SHA5122a5b12b41d728ce30f1712d23226bbefe73111b786156b97126d6497ef234e78feaf6db08c7412eaa336c869b93ab239cd46b33cc31ff2c8497214cba5927753
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD5a6a0160f7dee79a316edde54d910ebaa
SHA19b374842b8954e8b27a06f22f1c0de15ea768c31
SHA256f3646358e7a0d83e1140296fb384dc20e38a165f8f086cf240ace49e27e5b7c0
SHA5121510a5ac8bb5d3f7a3be3397ef5266861df92bb72d013d8f9432dae8f4310d7d494e67f6b49b712519fb96ef085eb1e233eb8bd4e42bfee10faf0f6da64e4b98
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD5e64e678c3ee0d7d5df186cad5aca1267
SHA1072447b11aed59d4e118b6e928d66833c4a1876d
SHA2562807672938fca9461dab3dcad9db910206462281ad9fd096036d55388eff80ce
SHA51283dfd168e9fd997f6b6422304f92d48d9739c71f0b6fed250a8217c2c18534480eefdabfa0fa5059d380d37bc2696a7dfbe5d6394170bfc31c0a26e9070e0773
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD508db07032310f4249cafd600e3af4923
SHA1d450a33f9493a9e103d5bc61fc3312e65a38b03c
SHA256b229d02776f1d2cfbba7b5641399b87443729435fcdfea19f7623317ceb9cc6d
SHA512a85192ae2135e3f30930dfb90b51e63bf11aaf851dacde798effbecae47e95b2b46533df2d319f5da3e7cccca46a688e903ce5dff513b2a804ddbb6b2c0b7cec
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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Filesize
383KB
MD58d7db6982df46c3b0f0cc879d892c08a
SHA164e3d7ab4793aeb05d18a82159c579e05c45fd71
SHA256116e15e94d70dde65f91f155580bd9b34ff1956b9ebe1a53b6bce912b281c1f6
SHA5120eeb242e6e1356a2a9e3183f12439ef36fac40e27ac8c0df5f591c7b3c1324145627c92c3fee15aedee2c1e8cc3b966152af73a33196166c2c1bfbbd979bdb5b
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C:\Users\Admin\AppData\Local\1f1eada8-7a6d-41d5-b069-236c6aa2db9d\5718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8.exe
Filesize724KB
MD5da2bd243d9b4d03f81edd0c339031299
SHA157d45114484ce1f8801bbbd3ae1b4ebdeb20c1dc
SHA2565718efcc7fbdfdc203bcdc098b56aaeba9131f7fe59fe2f1f78685a899840ac8
SHA5127b0b5385b0062b8b4e9b455f4dc4917317dcad30c38da3b4c4b1857c19ffdb5b4f9a9f1e647295e0891c81331bdbfba878d3f52ef9378f03a9c06eca1504899e