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Analysis
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max time kernel
68s -
max time network
141s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
18/09/2022, 18:38
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
file.exe
Resource
win10v2004-20220812-en
General
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Target
file.exe
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Size
787KB
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MD5
f976de456e761a39e3e9a12ccbd88bce
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SHA1
8c40302b89309035e90cd098bb1d2215c97f1a43
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SHA256
249cb4680de5cf06721fa03944054178a62fa79bdfb484ab1bcaea4b0d66a33e
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SHA512
11a1bf2b0110676d1e432547c757b8767cb522207dd27fbbbde237d2361e10476385b30f4dbbcff668528950b782dd2f105550300559e61aa275cede4ecdf397
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SSDEEP
12288:gRfNHwRGWrynMdC4YrytHTaEg4p4AMWmcEukaYY9dHmWZrLM0Ai75:gzwlVLYrwzaEg4p4LWsuka59ZnA45
Malware Config
Extracted
djvu
http://acacaca.org/test3/get.php
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extension
.aamv
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offline_id
MyudhIExJux2oRQXw95TT1oAPu7mvqRMzxr1eet1
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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 behavioral2/memory/5052-133-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5052-135-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3524-136-0x00000000022F0000-0x000000000240B000-memory.dmp family_djvu behavioral2/memory/5052-137-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5052-138-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/5052-142-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4000-147-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4000-145-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4000-150-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4000-188-0x0000000000400000-0x0000000000537000-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 224 build2.exe 2180 build3.exe 4528 build2.exe 2172 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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation file.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation file.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation build2.exe -
Loads dropped DLL 2 IoCs
pid Process 4528 build2.exe 4528 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4772 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-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\b72a5409-a003-4d79-90f9-2867e31da68a\\file.exe\" --AutoStart" file.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 10 api.2ip.ua 11 api.2ip.ua 22 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 3524 set thread context of 5052 3524 file.exe 82 PID 4816 set thread context of 4000 4816 file.exe 89 PID 224 set thread context of 4528 224 build2.exe 94 -
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 -
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 544 schtasks.exe 4360 schtasks.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 4108 timeout.exe -
Kills process with taskkill 1 IoCs
pid Process 2740 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 5052 file.exe 5052 file.exe 4000 file.exe 4000 file.exe 4528 build2.exe 4528 build2.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 2740 taskkill.exe -
Suspicious use of WriteProcessMemory 56 IoCs
description pid Process procid_target PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 3524 wrote to memory of 5052 3524 file.exe 82 PID 5052 wrote to memory of 4772 5052 file.exe 84 PID 5052 wrote to memory of 4772 5052 file.exe 84 PID 5052 wrote to memory of 4772 5052 file.exe 84 PID 5052 wrote to memory of 4816 5052 file.exe 85 PID 5052 wrote to memory of 4816 5052 file.exe 85 PID 5052 wrote to memory of 4816 5052 file.exe 85 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4816 wrote to memory of 4000 4816 file.exe 89 PID 4000 wrote to memory of 224 4000 file.exe 90 PID 4000 wrote to memory of 224 4000 file.exe 90 PID 4000 wrote to memory of 224 4000 file.exe 90 PID 4000 wrote to memory of 2180 4000 file.exe 91 PID 4000 wrote to memory of 2180 4000 file.exe 91 PID 4000 wrote to memory of 2180 4000 file.exe 91 PID 2180 wrote to memory of 544 2180 build3.exe 92 PID 2180 wrote to memory of 544 2180 build3.exe 92 PID 2180 wrote to memory of 544 2180 build3.exe 92 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 224 wrote to memory of 4528 224 build2.exe 94 PID 4528 wrote to memory of 4020 4528 build2.exe 95 PID 4528 wrote to memory of 4020 4528 build2.exe 95 PID 4528 wrote to memory of 4020 4528 build2.exe 95 PID 4020 wrote to memory of 2740 4020 cmd.exe 97 PID 4020 wrote to memory of 2740 4020 cmd.exe 97 PID 4020 wrote to memory of 2740 4020 cmd.exe 97 PID 4020 wrote to memory of 4108 4020 cmd.exe 98 PID 4020 wrote to memory of 4108 4020 cmd.exe 98 PID 4020 wrote to memory of 4108 4020 cmd.exe 98 PID 2172 wrote to memory of 4360 2172 mstsca.exe 101 PID 2172 wrote to memory of 4360 2172 mstsca.exe 101 PID 2172 wrote to memory of 4360 2172 mstsca.exe 101
Processes
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3524 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5052 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\b72a5409-a003-4d79-90f9-2867e31da68a" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4772
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C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4816 -
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4000 -
C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe"C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:224 -
C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe"C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\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:4528 -
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\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build2.exe" & del C:\PrograData\*.dll & exit7⤵
- Suspicious use of WriteProcessMemory
PID:4020 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im build2.exe /f8⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:2740
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
PID:4108
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C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build3.exe"C:\Users\Admin\AppData\Local\0415aacc-dcfe-4545-97ad-acd4ad5e96db\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2180 -
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:544
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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:2172 -
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:4360
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize2KB
MD51c626eac6241b02b0082a76f150a3a8a
SHA1b7c0c6ae1d3d5a2beaf4c4f3744cac6285f04858
SHA256412116af67c3a894bee8821158ee91447ca6cfe0d5b43d0524e6c5af5defaf69
SHA5128550f0ec9a9c5f152a3b5eb49a91084d3201589373b8d381233926f1ac34bd0c276fa1e3c9da75bd8297f417d9f566f4bf6b882107c7255522f745e6d446802a
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize1KB
MD5e9e482bf825221326b7c080ef52e5036
SHA167244c170dad567630298f89364a5e9626e2517a
SHA25660843d5086f10e833ca98696967f1a39ea04a2ffee6d87679b5803092b9cfa71
SHA512c7a5fd63c0faa2a5cd8be90c7dcf10d8dd564964dc4b8ab4fa1a7a188fa89094563f595c94f4ea133582cfbcf9cc90cb74bd273924b7fa5eadae868bced51440
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
Filesize488B
MD5f6ab95c9a5f2788ef1ed8b51cf3a5b37
SHA1a9904cd77d077d5af890976f74df54a7a3df58dd
SHA2565f9a82c01803e743983f2a0cd9cad16ab1f21c6e568995efc29162654a0d020b
SHA5125a3dbfe5b89f6ec4771ba5250bdee23b6a19f01cfaa760f5cd63e55a0245358ae7148fa95b6a660c019b334c0c9bfc2a081c1851fce701f6286509547a3c0714
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
Filesize482B
MD57ce778fe6b599c6876513a723d7cc5f2
SHA1cce148ffcd69972f2601673341810bd6eb75371d
SHA2567650572c604ea5949f5934cc5f1a758f9a6390b5364d111cef1859dbcd0342e1
SHA5122905dc8eabe6d87ffe4d54abacc25b7ea3974d20f9068fed8baa2a83728786c5ad5b9b281fef9cfff52676d0af9b97c30fb304d608d487d0d2ffc68de95a5fb7
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Filesize
400KB
MD5fe7e1a7ed3cece1c44e1eac81cb36948
SHA1f9f191e7e67ae39eb71099c4cedbf1be234e951e
SHA25632403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18
SHA512ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35
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Filesize
400KB
MD5fe7e1a7ed3cece1c44e1eac81cb36948
SHA1f9f191e7e67ae39eb71099c4cedbf1be234e951e
SHA25632403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18
SHA512ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35
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Filesize
400KB
MD5fe7e1a7ed3cece1c44e1eac81cb36948
SHA1f9f191e7e67ae39eb71099c4cedbf1be234e951e
SHA25632403699d91c207a88535bb023cf2cc6ca2f3bdb598439b3018a807f5949ca18
SHA512ce00aa592146ecd61d6f14401c22f4a682743702c91dcec4fa3e020f5a337aa500b9f2e5b5e7c39de2475c48332bf5b4b69ba04eb477f31364bd9ea3d730ce35
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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
787KB
MD5f976de456e761a39e3e9a12ccbd88bce
SHA18c40302b89309035e90cd098bb1d2215c97f1a43
SHA256249cb4680de5cf06721fa03944054178a62fa79bdfb484ab1bcaea4b0d66a33e
SHA51211a1bf2b0110676d1e432547c757b8767cb522207dd27fbbbde237d2361e10476385b30f4dbbcff668528950b782dd2f105550300559e61aa275cede4ecdf397
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a
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Filesize
9KB
MD59ead10c08e72ae41921191f8db39bc16
SHA1abe3bce01cd34afc88e2c838173f8c2bd0090ae1
SHA2568d7f0e6b6877bdfb9f4531afafd0451f7d17f0ac24e2f2427e9b4ecc5452b9f0
SHA512aa35dbc59a3589df2763e76a495ce5a9e62196628b4c1d098add38bd7f27c49edf93a66fb8507fb746e37ee32932da2460e440f241abe1a5a279abcc1e5ffe4a