Analysis
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max time kernel
92s -
max time network
157s -
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, 22:01
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
172244c254ce8b089f3b4a6053edbae4
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SHA1
1d83031e726d6c904f1fbca28aadb1baf7ea9886
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SHA256
ed1d1c08546a03aea04af1f0ae5a67cc1d5f0fe7a3c9fd41345f4335070c458a
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SHA512
7d3b3aa4b13687f2b19e4e231e68985b1f77d5629724b5a4d26845da2cb718d0eaf919d45ccda03dd3b1d799c116a4fee87286d9f5a8a2c3e3de56e43872e2e3
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SSDEEP
98304:AEym7QrK5R3rLi33D1iA0J8ENv4r8jHv6KE7zDgfsvgXcyC:4EjrLSTITRDjHvBEh4XcyC
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1944 is-R0HKC.tmp 1164 PrintFolders.exe 3196 cK2943XyrkieF.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation PrintFolders.exe -
Loads dropped DLL 1 IoCs
pid Process 1944 is-R0HKC.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-R0HKC.tmp File created C:\Program Files (x86)\PrintFolders\unins000.dat is-R0HKC.tmp File created C:\Program Files (x86)\PrintFolders\is-KDQUC.tmp is-R0HKC.tmp File created C:\Program Files (x86)\PrintFolders\is-GKSPE.tmp is-R0HKC.tmp File created C:\Program Files (x86)\PrintFolders\is-RF8LU.tmp is-R0HKC.tmp File opened for modification C:\Program Files (x86)\PrintFolders\PrintFolders.exe is-R0HKC.tmp File created C:\Program Files (x86)\PrintFolders\is-K923J.tmp is-R0HKC.tmp File created C:\Program Files (x86)\PrintFolders\is-G4FKR.tmp is-R0HKC.tmp File created C:\Program Files (x86)\PrintFolders\is-VDBVD.tmp is-R0HKC.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 4168 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 1164 PrintFolders.exe 1164 PrintFolders.exe 1164 PrintFolders.exe 1164 PrintFolders.exe 1164 PrintFolders.exe 1164 PrintFolders.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4168 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1400 wrote to memory of 1944 1400 file.exe 80 PID 1400 wrote to memory of 1944 1400 file.exe 80 PID 1400 wrote to memory of 1944 1400 file.exe 80 PID 1944 wrote to memory of 1164 1944 is-R0HKC.tmp 82 PID 1944 wrote to memory of 1164 1944 is-R0HKC.tmp 82 PID 1944 wrote to memory of 1164 1944 is-R0HKC.tmp 82 PID 1164 wrote to memory of 3196 1164 PrintFolders.exe 84 PID 1164 wrote to memory of 3196 1164 PrintFolders.exe 84 PID 1164 wrote to memory of 3196 1164 PrintFolders.exe 84 PID 1164 wrote to memory of 3988 1164 PrintFolders.exe 91 PID 1164 wrote to memory of 3988 1164 PrintFolders.exe 91 PID 1164 wrote to memory of 3988 1164 PrintFolders.exe 91 PID 3988 wrote to memory of 4168 3988 cmd.exe 93 PID 3988 wrote to memory of 4168 3988 cmd.exe 93 PID 3988 wrote to memory of 4168 3988 cmd.exe 93
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:1400 -
C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp"C:\Users\Admin\AppData\Local\Temp\is-16OSG.tmp\is-R0HKC.tmp" /SL4 $1C0022 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3379009 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1944 -
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:1164 -
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\cK2943XyrkieF.exe4⤵
- Executes dropped EXE
PID:3196
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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:3988 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "PrintFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4168
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
5.7MB
MD5f54b5a9b9ff3bcfaa46e6280ef35a273
SHA1985db004cb4e38b48479cffa3a4a6d375181ae67
SHA256f4b2f604c480129e193a78bac3e1e0ae6424724e9805548f0a2bdde400319c06
SHA51242a1be7a5e18456f8b52f6e767d8acb897d7bb288c03110181fdab84c7539dce78f07d58ac57149c97d8d74058bedb02ab9908ae146d6651db1b62f81ee51f76
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Filesize
5.7MB
MD5f54b5a9b9ff3bcfaa46e6280ef35a273
SHA1985db004cb4e38b48479cffa3a4a6d375181ae67
SHA256f4b2f604c480129e193a78bac3e1e0ae6424724e9805548f0a2bdde400319c06
SHA51242a1be7a5e18456f8b52f6e767d8acb897d7bb288c03110181fdab84c7539dce78f07d58ac57149c97d8d74058bedb02ab9908ae146d6651db1b62f81ee51f76
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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