Analysis
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max time kernel
156s -
max time network
189s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
03/12/2022, 23:19
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
6ff0800fc7a3a244f03fdbc9c60e36df
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SHA1
b24005b3c7690c038d2b0dda1bdde90c26f7dde8
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SHA256
1f0588ba5ba5818bf3f637f9d8397f829caa022fdc4eba73bb99b21a7b4cb110
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SHA512
effce8e61a073d75bde46d7ed2a3e4a49bb3e5085e98c98ca79f75c8fe0565c34817cdb13c0945b3042c860dd256c81ac730aaf9683596fe0ffb48304186bf8a
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SSDEEP
98304:4fDBNB1iiWDfaWH9aBBXb/Edkd+y5a7gUCqnj2MvrXXcyk:QDLB1gDyWH9ctbTEYa7gURjvvrXXcyk
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 3836 is-K7DSE.tmp 908 PrintFolders.exe 5004 676W3CL.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 3836 is-K7DSE.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\is-859V0.tmp is-K7DSE.tmp File created C:\Program Files (x86)\PrintFolders\is-7C8T3.tmp is-K7DSE.tmp File opened for modification C:\Program Files (x86)\PrintFolders\unins000.dat is-K7DSE.tmp File opened for modification C:\Program Files (x86)\PrintFolders\PrintFolders.exe is-K7DSE.tmp File created C:\Program Files (x86)\PrintFolders\is-D2V5K.tmp is-K7DSE.tmp File created C:\Program Files (x86)\PrintFolders\unins000.dat is-K7DSE.tmp File created C:\Program Files (x86)\PrintFolders\is-GI4P5.tmp is-K7DSE.tmp File created C:\Program Files (x86)\PrintFolders\is-ROO9G.tmp is-K7DSE.tmp File created C:\Program Files (x86)\PrintFolders\is-7HE07.tmp is-K7DSE.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 3608 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 908 PrintFolders.exe 908 PrintFolders.exe 908 PrintFolders.exe 908 PrintFolders.exe 908 PrintFolders.exe 908 PrintFolders.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
pid Process 908 PrintFolders.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3608 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 876 wrote to memory of 3836 876 file.exe 80 PID 876 wrote to memory of 3836 876 file.exe 80 PID 876 wrote to memory of 3836 876 file.exe 80 PID 3836 wrote to memory of 908 3836 is-K7DSE.tmp 83 PID 3836 wrote to memory of 908 3836 is-K7DSE.tmp 83 PID 3836 wrote to memory of 908 3836 is-K7DSE.tmp 83 PID 908 wrote to memory of 5004 908 PrintFolders.exe 84 PID 908 wrote to memory of 5004 908 PrintFolders.exe 84 PID 908 wrote to memory of 5004 908 PrintFolders.exe 84 PID 908 wrote to memory of 2496 908 PrintFolders.exe 88 PID 908 wrote to memory of 2496 908 PrintFolders.exe 88 PID 908 wrote to memory of 2496 908 PrintFolders.exe 88 PID 2496 wrote to memory of 3608 2496 cmd.exe 90 PID 2496 wrote to memory of 3608 2496 cmd.exe 90 PID 2496 wrote to memory of 3608 2496 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:876 -
C:\Users\Admin\AppData\Local\Temp\is-ELB60.tmp\is-K7DSE.tmp"C:\Users\Admin\AppData\Local\Temp\is-ELB60.tmp\is-K7DSE.tmp" /SL4 $30060 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3343168 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:3836 -
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:908 -
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\676W3CL.exe4⤵
- Executes dropped EXE
PID:5004
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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:2496 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "PrintFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:3608
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
5.7MB
MD510c5cd400a248e684849819520b65fcb
SHA14127a2bacfd03afff2b2f85f7f1cccfbe0577734
SHA2565805926735134b68688a78f99d347922db46ed75370f36606d4f479cbc93fb9b
SHA512362ae59bae1c84dd909b341d5bc0e79f22c047f23eaeaf2ed34fbeb13eb4a672e5aef53c870f5501c25a5ac793db71c4251b48308ee62284518d38383733b589
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Filesize
5.7MB
MD510c5cd400a248e684849819520b65fcb
SHA14127a2bacfd03afff2b2f85f7f1cccfbe0577734
SHA2565805926735134b68688a78f99d347922db46ed75370f36606d4f479cbc93fb9b
SHA512362ae59bae1c84dd909b341d5bc0e79f22c047f23eaeaf2ed34fbeb13eb4a672e5aef53c870f5501c25a5ac793db71c4251b48308ee62284518d38383733b589
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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