Analysis
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max time kernel
95s -
max time network
165s -
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, 02:32
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20221111-en
General
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Target
file.exe
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Size
3.4MB
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MD5
c6034f4549b86d011801c27633dfcb86
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SHA1
a4ac5a645aab0ef3d9a30959633bc87b30051568
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SHA256
da1ffb98a1ba267cd9056c23de1823f30ad4d6b585cf8bb0cef42dff1c980e41
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SHA512
da6c9c8ef0417c1e130f54fd4e15aa095274b6d7fa1c69dca8663dc7a60f3a5f85209cd4293a56f7885fd73fb0f9f87406d6523357404ce5fdd95d363cb1b2d8
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SSDEEP
98304:wfZnCpv0q9NW44ER0GjaT59FU2/VRJZGzyXcy0:EZnCpvzNTLqsaN9vjziyXcy0
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4528 is-B2N90.tmp 4056 PrintFolders.exe 4496 8V4iO1x4vuVz.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 4528 is-B2N90.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-H9LF1.tmp is-B2N90.tmp File opened for modification C:\Program Files (x86)\PrintFolders\unins000.dat is-B2N90.tmp File opened for modification C:\Program Files (x86)\PrintFolders\PrintFolders.exe is-B2N90.tmp File created C:\Program Files (x86)\PrintFolders\unins000.dat is-B2N90.tmp File created C:\Program Files (x86)\PrintFolders\is-EO0KF.tmp is-B2N90.tmp File created C:\Program Files (x86)\PrintFolders\is-U67SA.tmp is-B2N90.tmp File created C:\Program Files (x86)\PrintFolders\is-OS33O.tmp is-B2N90.tmp File created C:\Program Files (x86)\PrintFolders\is-SR6A5.tmp is-B2N90.tmp File created C:\Program Files (x86)\PrintFolders\is-PP5GD.tmp is-B2N90.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 392 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4056 PrintFolders.exe 4056 PrintFolders.exe 4056 PrintFolders.exe 4056 PrintFolders.exe 4056 PrintFolders.exe 4056 PrintFolders.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 392 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 4644 wrote to memory of 4528 4644 file.exe 78 PID 4644 wrote to memory of 4528 4644 file.exe 78 PID 4644 wrote to memory of 4528 4644 file.exe 78 PID 4528 wrote to memory of 4056 4528 is-B2N90.tmp 79 PID 4528 wrote to memory of 4056 4528 is-B2N90.tmp 79 PID 4528 wrote to memory of 4056 4528 is-B2N90.tmp 79 PID 4056 wrote to memory of 4496 4056 PrintFolders.exe 80 PID 4056 wrote to memory of 4496 4056 PrintFolders.exe 80 PID 4056 wrote to memory of 4496 4056 PrintFolders.exe 80 PID 4056 wrote to memory of 3372 4056 PrintFolders.exe 89 PID 4056 wrote to memory of 3372 4056 PrintFolders.exe 89 PID 4056 wrote to memory of 3372 4056 PrintFolders.exe 89 PID 3372 wrote to memory of 392 3372 cmd.exe 91 PID 3372 wrote to memory of 392 3372 cmd.exe 91 PID 3372 wrote to memory of 392 3372 cmd.exe 91
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:4644 -
C:\Users\Admin\AppData\Local\Temp\is-OETG8.tmp\is-B2N90.tmp"C:\Users\Admin\AppData\Local\Temp\is-OETG8.tmp\is-B2N90.tmp" /SL4 $E0048 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3379329 517122⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4528 -
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:4056 -
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\8V4iO1x4vuVz.exe4⤵
- Executes dropped EXE
PID:4496
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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:3372 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "PrintFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:392
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
5.7MB
MD57298f1dba651b53f57de70bfaa68513b
SHA182d1a33bedd06d13fe2e84c24b6f6f3c7f92e283
SHA2562fee859c53ced4e276a7738cd55740a4a64fbac4f3f6dbc9d1b84339357b6919
SHA512ca9fca317dfbe1d19763a8633005e420ca47296be1dc781da559a12e1e44018e25c25cdb17eea81d0c6a5b901d477f342b1cf70169e0bcdbf7486a4f9d23c6ab
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Filesize
5.7MB
MD57298f1dba651b53f57de70bfaa68513b
SHA182d1a33bedd06d13fe2e84c24b6f6f3c7f92e283
SHA2562fee859c53ced4e276a7738cd55740a4a64fbac4f3f6dbc9d1b84339357b6919
SHA512ca9fca317dfbe1d19763a8633005e420ca47296be1dc781da559a12e1e44018e25c25cdb17eea81d0c6a5b901d477f342b1cf70169e0bcdbf7486a4f9d23c6ab
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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