Analysis
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max time kernel
150s -
max time network
169s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
04/12/2022, 06:48
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220812-en
General
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Target
file.exe
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Size
3.4MB
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MD5
ce6a6db5f1fa6dd84a6d924d7c56d843
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SHA1
198d5eca34e902617635ac01a6f8efe7b874881b
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SHA256
d6cca5ac8587159d1a92848e65baf197a1dcdfaa7c2a8d955042d632af737692
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SHA512
ef4bbd3a20d932398adcb08b93251c6137944d349e22e237a80125b89d8aa1f8aef0ebf32494dfdb8dd3602ee07e07ebbc91c0e49d5057c4dcc7786e4d94185f
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SSDEEP
49152:o4UbbEPSOucMflyPFaU5NNyy2h1y5haKWwhynekiC2I58qBcIwMcAo5YNrc2gwDO:oxEaOLMNyPvT90QaMdbsrcYDXcyS
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 2628 is-RFLQI.tmp 508 PrintFolders.exe 1980 c3JC0on43S.exe -
Checks computer location settings 2 TTPs 1 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 PrintFolders.exe -
Loads dropped DLL 1 IoCs
pid Process 2628 is-RFLQI.tmp -
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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Drops file in Program Files directory 9 IoCs
description ioc Process File created C:\Program Files (x86)\PrintFolders\unins000.dat is-RFLQI.tmp File created C:\Program Files (x86)\PrintFolders\is-4LTUU.tmp is-RFLQI.tmp File created C:\Program Files (x86)\PrintFolders\is-01MHS.tmp is-RFLQI.tmp File opened for modification C:\Program Files (x86)\PrintFolders\PrintFolders.exe is-RFLQI.tmp File created C:\Program Files (x86)\PrintFolders\is-MHCS7.tmp is-RFLQI.tmp File created C:\Program Files (x86)\PrintFolders\is-C3MOQ.tmp is-RFLQI.tmp File created C:\Program Files (x86)\PrintFolders\is-OC0LP.tmp is-RFLQI.tmp File created C:\Program Files (x86)\PrintFolders\is-7Q73L.tmp is-RFLQI.tmp File opened for modification C:\Program Files (x86)\PrintFolders\unins000.dat is-RFLQI.tmp -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Kills process with taskkill 1 IoCs
pid Process 3140 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 508 PrintFolders.exe 508 PrintFolders.exe 508 PrintFolders.exe 508 PrintFolders.exe 508 PrintFolders.exe 508 PrintFolders.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3140 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1192 wrote to memory of 2628 1192 file.exe 79 PID 1192 wrote to memory of 2628 1192 file.exe 79 PID 1192 wrote to memory of 2628 1192 file.exe 79 PID 2628 wrote to memory of 508 2628 is-RFLQI.tmp 82 PID 2628 wrote to memory of 508 2628 is-RFLQI.tmp 82 PID 2628 wrote to memory of 508 2628 is-RFLQI.tmp 82 PID 508 wrote to memory of 1980 508 PrintFolders.exe 83 PID 508 wrote to memory of 1980 508 PrintFolders.exe 83 PID 508 wrote to memory of 1980 508 PrintFolders.exe 83 PID 508 wrote to memory of 3172 508 PrintFolders.exe 84 PID 508 wrote to memory of 3172 508 PrintFolders.exe 84 PID 508 wrote to memory of 3172 508 PrintFolders.exe 84 PID 3172 wrote to memory of 3140 3172 cmd.exe 86 PID 3172 wrote to memory of 3140 3172 cmd.exe 86 PID 3172 wrote to memory of 3140 3172 cmd.exe 86
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 WriteProcessMemory
PID:1192 -
C:\Users\Admin\AppData\Local\Temp\is-NRJ8E.tmp\is-RFLQI.tmp"C:\Users\Admin\AppData\Local\Temp\is-NRJ8E.tmp\is-RFLQI.tmp" /SL4 $40060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3379951 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2628 -
C:\Program Files (x86)\PrintFolders\PrintFolders.exe"C:\Program Files (x86)\PrintFolders\PrintFolders.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:508 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\c3JC0on43S.exe4⤵
- Executes dropped EXE
PID:1980
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:3172 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "PrintFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3140
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
5.8MB
MD5f1828992ad010b3808429838fb1ceb30
SHA120c754d9c6923292468f8dfbcfcf7f9366c80dd1
SHA2560586190fe5ca665e4b932c6c1557bc7cc9993bcada6be27023004babb8f611ff
SHA5123c3081a6138f6cd3e17fbbbd4c6cf71e5feb5021ecdd532f094e4c47d511050f225c07be4e299d9968430f7ecf24c1c43564f3f0be06e65407dd46acf7b96b63
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Filesize
5.8MB
MD5f1828992ad010b3808429838fb1ceb30
SHA120c754d9c6923292468f8dfbcfcf7f9366c80dd1
SHA2560586190fe5ca665e4b932c6c1557bc7cc9993bcada6be27023004babb8f611ff
SHA5123c3081a6138f6cd3e17fbbbd4c6cf71e5feb5021ecdd532f094e4c47d511050f225c07be4e299d9968430f7ecf24c1c43564f3f0be06e65407dd46acf7b96b63
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
643KB
MD5363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1a4cdb756698ed28f522956166a6292e9e309dd9c
SHA256b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
SHA512b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
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Filesize
643KB
MD5363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1a4cdb756698ed28f522956166a6292e9e309dd9c
SHA256b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
SHA512b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c