Analysis
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max time kernel
57s -
max time network
122s -
platform
windows7_x64 -
resource
win7-20220414-en -
submitted
25-04-2022 02:10
Static task
static1
Behavioral task
behavioral1
Sample
buildp.exe
Resource
win7-20220414-en
Behavioral task
behavioral2
Sample
buildp.exe
Resource
win10v2004-20220414-en
General
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Target
buildp.exe
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Size
841KB
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MD5
efed57771cb41fdde63781d1e195912c
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SHA1
a71b0545951c99eb6ad4a50c22d02c958003d920
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SHA256
72cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d
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SHA512
6fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080
Malware Config
Extracted
djvu
http://fuyt.org/lancer/get.php
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extension
.gtys
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offline_id
qwVQoIsE2xLety0oNWloOilSDuIBXJGK86LM3ot1
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payload_url
http://zerit.top/dl/build2.exe
http://fuyt.org/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 8 IoCs
resource yara_rule behavioral1/memory/884-55-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/884-56-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/960-59-0x0000000001D80000-0x0000000001E9B000-memory.dmp family_djvu behavioral1/memory/884-61-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/884-62-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1112-68-0x0000000000424141-mapping.dmp family_djvu behavioral1/memory/1112-72-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1112-78-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
suricata: ET MALWARE Potential Dridex.Maldoc Minimal Executable Request
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Modifies file permissions 1 TTPs 1 IoCs
pid Process 1216 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2277218442-1199762539-2004043321-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\ac8b3858-4011-459b-97fd-4b7f805603e0\\buildp.exe\" --AutoStart" buildp.exe -
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 4 api.2ip.ua 12 api.2ip.ua 3 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 960 set thread context of 884 960 buildp.exe 27 PID 1920 set thread context of 1112 1920 buildp.exe 32 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 buildp.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 buildp.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 1900000001000000100000002aa1c05e2ae606f198c2c5e937c97aa2030000000100000014000000d1eb23a46d17d68fd92564c2f1f1601764d8e3491d00000001000000100000002e0d6875874a44c820912e85e964cfdb140000000100000014000000a0110a233e96f107ece2af29ef82a57fd030a4b40b00000001000000180000004300b7004f00b7004d00b7004f00b7004400b7004f00000053000000010000002600000030243022060c2b06010401b231010201050130123010060a2b0601040182373c0101030200c0090000000100000034000000303206082b0601050507030106082b0601050507030206082b0601050507030406082b0601050507030306082b060105050703080f00000001000000140000003e8e6487f8fd27d322a269a71edaac5d57811286200000000100000036040000308204323082031aa003020102020101300d06092a864886f70d0101050500307b310b3009060355040613024742311b301906035504080c1247726561746572204d616e636865737465723110300e06035504070c0753616c666f7264311a3018060355040a0c11436f6d6f646f204341204c696d697465643121301f06035504030c18414141204365727469666963617465205365727669636573301e170d3034303130313030303030305a170d3238313233313233353935395a307b310b3009060355040613024742311b301906035504080c1247726561746572204d616e636865737465723110300e06035504070c0753616c666f7264311a3018060355040a0c11436f6d6f646f204341204c696d697465643121301f06035504030c1841414120436572746966696361746520536572766963657330820122300d06092a864886f70d01010105000382010f003082010a0282010100be409df46ee1ea76871c4d45448ebe46c883069dc12afe181f8ee402faf3ab5d508a16310b9a06d0c57022cd492d5463ccb66e68460b53eacb4c24c0bc724eeaf115aef4549a120ac37ab23360e2da8955f32258f3dedccfef8386a28c944f9f68f29890468427c776bfe3cc352c8b5e07646582c048b0a891f9619f762050a891c766b5eb78620356f08a1a13ea31a31ea099fd38f6f62732586f07f56bb8fb142bafb7aaccd6635f738cda0599a838a8cb17783651ace99ef4783a8dcf0fd942e2980cab2f9f0e01deef9f9949f12ddfac744d1b98b547c5e529d1f99018c7629cbe83c7267b3e8a25c7c0dd9de6356810209d8fd8ded2c3849c0d5ee82fc90203010001a381c03081bd301d0603551d0e04160414a0110a233e96f107ece2af29ef82a57fd030a4b4300e0603551d0f0101ff040403020106300f0603551d130101ff040530030101ff307b0603551d1f047430723038a036a0348632687474703a2f2f63726c2e636f6d6f646f63612e636f6d2f414141436572746966696361746553657276696365732e63726c3036a034a0328630687474703a2f2f63726c2e636f6d6f646f2e6e65742f414141436572746966696361746553657276696365732e63726c300d06092a864886f70d010105050003820101000856fc02f09be8ffa4fad67bc64480ce4fc4c5f60058cca6b6bc1449680476e8e6ee5dec020f60d68d50184f264e01e3e6b0a5eebfbc745441bffdfc12b8c74f5af48960057f60b7054af3f6f1c2bfc4b97486b62d7d6bccd2f346dd2fc6e06ac3c334032c7d96dd5ac20ea70a99c1058bab0c2ff35c3acf6c37550987de53406c58effcb6ab656e04f61bdc3ce05a15c69ed9f15948302165036cece92173ec9b03a1e037ada015188ffaba02cea72ca910132cd4e50826ab229760f8905e74d4a29a53bdf2a968e0a26ec2d76cb1a30f9ebfeb68e756f2aef2e32b383a0981b56b85d7be2ded3f1ab7b263e2f5622c82d46a004150f139839f95e93696986e buildp.exe Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349 buildp.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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 buildp.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
pid Process 884 buildp.exe 1112 buildp.exe 1112 buildp.exe -
Suspicious use of WriteProcessMemory 30 IoCs
description pid Process procid_target PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 960 wrote to memory of 884 960 buildp.exe 27 PID 884 wrote to memory of 1216 884 buildp.exe 30 PID 884 wrote to memory of 1216 884 buildp.exe 30 PID 884 wrote to memory of 1216 884 buildp.exe 30 PID 884 wrote to memory of 1216 884 buildp.exe 30 PID 884 wrote to memory of 1920 884 buildp.exe 31 PID 884 wrote to memory of 1920 884 buildp.exe 31 PID 884 wrote to memory of 1920 884 buildp.exe 31 PID 884 wrote to memory of 1920 884 buildp.exe 31 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32 PID 1920 wrote to memory of 1112 1920 buildp.exe 32
Processes
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C:\Users\Admin\AppData\Local\Temp\buildp.exe"C:\Users\Admin\AppData\Local\Temp\buildp.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:960 -
C:\Users\Admin\AppData\Local\Temp\buildp.exe"C:\Users\Admin\AppData\Local\Temp\buildp.exe"2⤵
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:884 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\ac8b3858-4011-459b-97fd-4b7f805603e0" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1216
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C:\Users\Admin\AppData\Local\Temp\buildp.exe"C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1920 -
C:\Users\Admin\AppData\Local\Temp\buildp.exe"C:\Users\Admin\AppData\Local\Temp\buildp.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
PID:1112
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize727B
MD5d9c694c2d95c6812aa0be903de46da96
SHA1df1a733a9c6c27997c798ae4c5715cabe1ffa5e4
SHA256f6f85bc0d1770803a206fbfb83c4cb888b3a24b494feac38baa3ea764cda37c0
SHA51297a2eddf197aa74d1d05241008ead092f836b561bc1ad1d731d91db23d6dcce7a65d3dc1609384a3ad3fd5c858bae6c3a4361588b5a965ebf233f14410864793
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize471B
MD5ad8e032271f02af2a955ce10661cc3a8
SHA1967d1bd99bea34c3110cc75c0c0d8b8565eae9f9
SHA256d5081bf75d530e9336a6da0f9142bc10f4d06368c365cf0e33f7c99b0f643ce8
SHA512bc69dfb03284cf1b8d172ff55938f238b928a0c7846306d8232ab697f54c771a9acf8b0e04a85e149da87ea8cfd9395605d0d95afc30eae1793e91399aa7eef7
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize402B
MD556e3521b3870ba5e751351d81595e214
SHA1f093ff3595ebc3ce5106cbcc7ad8ecda8e45ff1e
SHA2569b8af4686b2c53055a6d78157374c1ae639e3b4237a8aec19fdbcce6456abecb
SHA5129955c5fa9da6d6e05b3b090c82f999e4f2c1fc7f26dd2beef9d0f154871ea3aecd1820dee32554ceccb21738602a3260218be35bec4e36d36b40a9f0f2a9781f
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Filesize344B
MD5506554edca41b899a89be2bc9144e786
SHA151a7e5dc7a507decb5dc47605660c725b54f3ce1
SHA256dfac27be4e08f5f767b1e9c9df0c35dd6d338f49836313c81753f493aab80873
SHA512589458d7548f3acd8a2120f8b94510d578f04cfb648931c023fbb22996a8df904037e9c0b8f8fb7e2a0a0f2ea209c992db11cfa4537ef9626087595f86d7d0ab
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize396B
MD5637529ce20aa05b3c687a6eabbc0d698
SHA1d954f9d9075329ab50b218f43670001893d19465
SHA25628b1386bbe214f2a9a1dda23193480cbe8abfc931af520cecaac9d9bfba8ca92
SHA5124a9688faed3ef4909b039c6db82111a4d42ff60c0f2c6ae7a2c2b268cc3616213d70b817a030ae7c9ff82d283a6f7b1b24db9fc3327f6ce3efae6785e185089b
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Filesize
841KB
MD5efed57771cb41fdde63781d1e195912c
SHA1a71b0545951c99eb6ad4a50c22d02c958003d920
SHA25672cd1426f13a698c7d63a288f4920147812303e8f10a4e66e414cc7c2206381d
SHA5126fd84f80ba5f3c53f48a6a0135cedc7b489cca419742e043116468bcda0898398dd7ddff4ac7d0d8b283312d4c411790b8ff74276f14016021597498b306a080