Analysis
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max time kernel
139s -
max time network
148s -
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, 00:46
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20220901-en
General
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Target
file.exe
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Size
3.5MB
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MD5
4707406064875820b8e29b8fe679052b
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SHA1
7afad44e762cfa79e27c960569e020218d5f30d1
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SHA256
5db9ccb6af28ae7d4ac38d4123c7e10476817444abab6013247f86da99c49f59
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SHA512
58e1d1409def6247abe05d30f7d57430ef935cea545c47070af0cdc1874d34dbafb3998d4877df57f26a71bb4c156c06fbfb386e2a0fda5999409cfd90927b65
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SSDEEP
98304:wREp/Buc1/CwcD4BwuAMzBC8xFxPnv9Xcyl:wEu9BDawdMlXxjPnv9Xcyl
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4568 is-8JPBH.tmp 4364 PrintFolders.exe 4964 fpGAWjKTmNWiTH.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation PrintFolders.exe -
Loads dropped DLL 1 IoCs
pid Process 4568 is-8JPBH.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 opened for modification C:\Program Files (x86)\PrintFolders\unins000.dat is-8JPBH.tmp File created C:\Program Files (x86)\PrintFolders\is-4VGFU.tmp is-8JPBH.tmp File created C:\Program Files (x86)\PrintFolders\is-60JB3.tmp is-8JPBH.tmp File created C:\Program Files (x86)\PrintFolders\is-KTP97.tmp is-8JPBH.tmp File created C:\Program Files (x86)\PrintFolders\is-24LEV.tmp is-8JPBH.tmp File created C:\Program Files (x86)\PrintFolders\is-J72NV.tmp is-8JPBH.tmp File created C:\Program Files (x86)\PrintFolders\is-47F2B.tmp is-8JPBH.tmp File opened for modification C:\Program Files (x86)\PrintFolders\PrintFolders.exe is-8JPBH.tmp File created C:\Program Files (x86)\PrintFolders\unins000.dat is-8JPBH.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 3224 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4364 PrintFolders.exe 4364 PrintFolders.exe 4364 PrintFolders.exe 4364 PrintFolders.exe 4364 PrintFolders.exe 4364 PrintFolders.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 4364 PrintFolders.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3224 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1912 wrote to memory of 4568 1912 file.exe 80 PID 1912 wrote to memory of 4568 1912 file.exe 80 PID 1912 wrote to memory of 4568 1912 file.exe 80 PID 4568 wrote to memory of 4364 4568 is-8JPBH.tmp 81 PID 4568 wrote to memory of 4364 4568 is-8JPBH.tmp 81 PID 4568 wrote to memory of 4364 4568 is-8JPBH.tmp 81 PID 4364 wrote to memory of 4964 4364 PrintFolders.exe 84 PID 4364 wrote to memory of 4964 4364 PrintFolders.exe 84 PID 4364 wrote to memory of 4964 4364 PrintFolders.exe 84 PID 4364 wrote to memory of 3356 4364 PrintFolders.exe 88 PID 4364 wrote to memory of 3356 4364 PrintFolders.exe 88 PID 4364 wrote to memory of 3356 4364 PrintFolders.exe 88 PID 3356 wrote to memory of 3224 3356 cmd.exe 90 PID 3356 wrote to memory of 3224 3356 cmd.exe 90 PID 3356 wrote to memory of 3224 3356 cmd.exe 90
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:1912 -
C:\Users\Admin\AppData\Local\Temp\is-1SC92.tmp\is-8JPBH.tmp"C:\Users\Admin\AppData\Local\Temp\is-1SC92.tmp\is-8JPBH.tmp" /SL4 $F01DC "C:\Users\Admin\AppData\Local\Temp\file.exe" 3391930 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4568 -
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 behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:4364 -
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\fpGAWjKTmNWiTH.exe4⤵
- Executes dropped EXE
PID:4964
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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:3356 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "PrintFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3224
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
5.7MB
MD510231200d09413e190e3a5485b045915
SHA1769a4cb199bfa5d8806e111ded29a15de9c88b5f
SHA256e2160396e2605676c4f11309ae5a70c41b5dadf16076f90558c95a81a1670790
SHA512135bf7d92ba579a094c77ad9c3419b55de7bedbde7f913bc970e48415cbf4295bece0bb192df4fe6f3737cb94246794e6be1f48956f31b537841d182e42f6f4a
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Filesize
5.7MB
MD510231200d09413e190e3a5485b045915
SHA1769a4cb199bfa5d8806e111ded29a15de9c88b5f
SHA256e2160396e2605676c4f11309ae5a70c41b5dadf16076f90558c95a81a1670790
SHA512135bf7d92ba579a094c77ad9c3419b55de7bedbde7f913bc970e48415cbf4295bece0bb192df4fe6f3737cb94246794e6be1f48956f31b537841d182e42f6f4a
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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
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c