Analysis
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max time kernel
91s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20221111-en -
resource tags
arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system -
submitted
23/12/2022, 01:01
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
1.8MB
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MD5
5c1e63f7a1e73dd84950a896ce940743
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SHA1
a5f4e981bf7677787e4673d1377e8014c07726c2
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SHA256
065dfc499ee4b3749fc69b4c42815d10d8fde9299385a6162b95bee5ed7482ac
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SHA512
777d7e1c9a52a7c9163d4c09c0e03bc59be3251aabecd8f7145d2543110ab5d9f4b821d34074dad243c4ee099f6b44769b88a3a94303d39ca61ab9299ba76d6a
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SSDEEP
49152:7xK47kiEWSTioN4pWzB27MOGGZ2g6XWP7p3h:7xLkDWSTAs927MLGZ2gMGdh
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 4016 is-SAC6D.tmp 5112 SplitFiles117.exe 624 2frXjStDTE2hl.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation SplitFiles117.exe -
Loads dropped DLL 1 IoCs
pid Process 4016 is-SAC6D.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 17 IoCs
description ioc Process File created C:\Program Files (x86)\Split Files\language\is-4TIAD.tmp is-SAC6D.tmp File opened for modification C:\Program Files (x86)\Split Files\SplitFiles117.exe is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\is-Q9OAP.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\language\is-1375P.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\language\is-KG21K.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\is-VDILV.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\is-BA2RV.tmp is-SAC6D.tmp File opened for modification C:\Program Files (x86)\Split Files\unins000.dat is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\is-N6C5L.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\language\is-M0N6K.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\language\is-AKNVO.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\language\is-0T0VA.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\is-ITV98.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\unins000.dat is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\language\is-5S3T4.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\language\is-BG2OV.tmp is-SAC6D.tmp File created C:\Program Files (x86)\Split Files\language\is-VNNJJ.tmp is-SAC6D.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 4796 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 5112 SplitFiles117.exe 5112 SplitFiles117.exe 5112 SplitFiles117.exe 5112 SplitFiles117.exe 5112 SplitFiles117.exe 5112 SplitFiles117.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4796 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1080 wrote to memory of 4016 1080 file.exe 83 PID 1080 wrote to memory of 4016 1080 file.exe 83 PID 1080 wrote to memory of 4016 1080 file.exe 83 PID 4016 wrote to memory of 5112 4016 is-SAC6D.tmp 84 PID 4016 wrote to memory of 5112 4016 is-SAC6D.tmp 84 PID 4016 wrote to memory of 5112 4016 is-SAC6D.tmp 84 PID 5112 wrote to memory of 624 5112 SplitFiles117.exe 85 PID 5112 wrote to memory of 624 5112 SplitFiles117.exe 85 PID 5112 wrote to memory of 624 5112 SplitFiles117.exe 85 PID 5112 wrote to memory of 5064 5112 SplitFiles117.exe 93 PID 5112 wrote to memory of 5064 5112 SplitFiles117.exe 93 PID 5112 wrote to memory of 5064 5112 SplitFiles117.exe 93 PID 5064 wrote to memory of 4796 5064 cmd.exe 95 PID 5064 wrote to memory of 4796 5064 cmd.exe 95 PID 5064 wrote to memory of 4796 5064 cmd.exe 95
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:1080 -
C:\Users\Admin\AppData\Local\Temp\is-RUIJT.tmp\is-SAC6D.tmp"C:\Users\Admin\AppData\Local\Temp\is-RUIJT.tmp\is-SAC6D.tmp" /SL4 $80030 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1635976 1331202⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:4016 -
C:\Program Files (x86)\Split Files\SplitFiles117.exe"C:\Program Files (x86)\Split Files\SplitFiles117.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:5112 -
C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\2frXjStDTE2hl.exe4⤵
- Executes dropped EXE
PID:624
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles117.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles117.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:5064 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "SplitFiles117.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:4796
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.2MB
MD5732535dafceb8bcdaa14f40f70ae110f
SHA1e6d6e9f96fe75e9ca758c8969ca9bcc29abe1370
SHA256ef24f1baa0c5bb6be981d9d67d429df65be930983ed14e27fbdf2485050a258a
SHA5126574dcd35eabf1a77b42c10bd31f1f54a7acb4ca633f36b99d376eb4daf0f1766f9b5e1b5cf2ab881e5c6ab1d8490cb7b497b2ac33bb76209adc74135ee9b913
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Filesize
3.2MB
MD5732535dafceb8bcdaa14f40f70ae110f
SHA1e6d6e9f96fe75e9ca758c8969ca9bcc29abe1370
SHA256ef24f1baa0c5bb6be981d9d67d429df65be930983ed14e27fbdf2485050a258a
SHA5126574dcd35eabf1a77b42c10bd31f1f54a7acb4ca633f36b99d376eb4daf0f1766f9b5e1b5cf2ab881e5c6ab1d8490cb7b497b2ac33bb76209adc74135ee9b913
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
723KB
MD57fd7ec3d32ed2a377fa18e8931475b2e
SHA130b386da1750701f78cbf65550f32661d8a4175f
SHA2560290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455
SHA512db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334
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Filesize
723KB
MD57fd7ec3d32ed2a377fa18e8931475b2e
SHA130b386da1750701f78cbf65550f32661d8a4175f
SHA2560290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455
SHA512db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c