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Analysis
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max time kernel
61s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
17/12/2022, 13:31
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
2.3MB
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MD5
ec616833bf4cb2a01f40730cef04efcd
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SHA1
ebca2be25153ef2696fe0037d47219c9c593eddb
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SHA256
4911330ebb6477a1c55e87658de922bbc12cadcf8769db69f665f63d6417bbb5
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SHA512
72fc2bf15088e731a09c6cd4c71cafc688a644aa598ed8cf27609487d5d46b9076ab5d8590da1d3d473bba4ca783ef37e9546e99e964b1746282f817fd3fac04
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SSDEEP
49152:5fCBx0egW+k4/odRfroT9D7syVb8LsSLOVbBDivLlAz:56l+kC4Rfrs9CASkhz
Malware Config
Extracted
nymaim
45.139.105.171
85.31.46.167
Signatures
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Executes dropped EXE 3 IoCs
pid Process 1584 is-OA8F0.tmp 664 obFolders.exe 4240 sXhHEVNwuvZ.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation obFolders.exe -
Loads dropped DLL 1 IoCs
pid Process 1584 is-OA8F0.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-BS2RI.tmp is-OA8F0.tmp File created C:\Program Files (x86)\PrintFolders\is-8OLNA.tmp is-OA8F0.tmp File created C:\Program Files (x86)\PrintFolders\is-SM609.tmp is-OA8F0.tmp File created C:\Program Files (x86)\PrintFolders\is-RG9CJ.tmp is-OA8F0.tmp File opened for modification C:\Program Files (x86)\PrintFolders\unins000.dat is-OA8F0.tmp File created C:\Program Files (x86)\PrintFolders\unins000.dat is-OA8F0.tmp File created C:\Program Files (x86)\PrintFolders\is-5OP49.tmp is-OA8F0.tmp File opened for modification C:\Program Files (x86)\PrintFolders\obFolders.exe is-OA8F0.tmp File created C:\Program Files (x86)\PrintFolders\is-J68E9.tmp is-OA8F0.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 1400 taskkill.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 664 obFolders.exe 664 obFolders.exe 664 obFolders.exe 664 obFolders.exe 664 obFolders.exe 664 obFolders.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1400 taskkill.exe -
Suspicious use of WriteProcessMemory 15 IoCs
description pid Process procid_target PID 1612 wrote to memory of 1584 1612 file.exe 82 PID 1612 wrote to memory of 1584 1612 file.exe 82 PID 1612 wrote to memory of 1584 1612 file.exe 82 PID 1584 wrote to memory of 664 1584 is-OA8F0.tmp 83 PID 1584 wrote to memory of 664 1584 is-OA8F0.tmp 83 PID 1584 wrote to memory of 664 1584 is-OA8F0.tmp 83 PID 664 wrote to memory of 4240 664 obFolders.exe 84 PID 664 wrote to memory of 4240 664 obFolders.exe 84 PID 664 wrote to memory of 4240 664 obFolders.exe 84 PID 664 wrote to memory of 4496 664 obFolders.exe 92 PID 664 wrote to memory of 4496 664 obFolders.exe 92 PID 664 wrote to memory of 4496 664 obFolders.exe 92 PID 4496 wrote to memory of 1400 4496 cmd.exe 94 PID 4496 wrote to memory of 1400 4496 cmd.exe 94 PID 4496 wrote to memory of 1400 4496 cmd.exe 94
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:1612 -
C:\Users\Admin\AppData\Local\Temp\is-UA29S.tmp\is-OA8F0.tmp"C:\Users\Admin\AppData\Local\Temp\is-UA29S.tmp\is-OA8F0.tmp" /SL4 $D01EE "C:\Users\Admin\AppData\Local\Temp\file.exe" 2152622 1694722⤵
- Executes dropped EXE
- Loads dropped DLL
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:1584 -
C:\Program Files (x86)\PrintFolders\obFolders.exe"C:\Program Files (x86)\PrintFolders\obFolders.exe"3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:664 -
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\sXhHEVNwuvZ.exe
- Executes dropped EXE
PID:4240
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c taskkill /im "obFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\obFolders.exe" & exit4⤵
- Suspicious use of WriteProcessMemory
PID:4496 -
C:\Windows\SysWOW64\taskkill.exetaskkill /im "obFolders.exe" /f5⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
PID:1400
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.5MB
MD5519304298fd32ccbff7c78fe7c7c61a9
SHA110297f328165563fff5f8e4eb4685232e71778cb
SHA2563592f01903837377542c07373ed7b4c517bbec3817bfbb007b63202cce7c1236
SHA5123935080afd29ccee2aa6728aa06b2e19d9062c297329566e35402b4f7210b353ded56090bbf50cfec444d8750257f6e7f3b6c97929739a06229715a6cc295f20
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Filesize
3.5MB
MD5519304298fd32ccbff7c78fe7c7c61a9
SHA110297f328165563fff5f8e4eb4685232e71778cb
SHA2563592f01903837377542c07373ed7b4c517bbec3817bfbb007b63202cce7c1236
SHA5123935080afd29ccee2aa6728aa06b2e19d9062c297329566e35402b4f7210b353ded56090bbf50cfec444d8750257f6e7f3b6c97929739a06229715a6cc295f20
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Filesize
2KB
MD5a69559718ab506675e907fe49deb71e9
SHA1bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA2562f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
SHA512e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
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Filesize
759KB
MD50dc8826072fc99382be7db6ae5929aff
SHA17ca23e146bf9bde712b27e400de3243e6bd0a357
SHA25611ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec
SHA51208db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442
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Filesize
759KB
MD50dc8826072fc99382be7db6ae5929aff
SHA17ca23e146bf9bde712b27e400de3243e6bd0a357
SHA25611ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec
SHA51208db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
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Filesize
72KB
MD53fb36cb0b7172e5298d2992d42984d06
SHA1439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA25627ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
SHA5126b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c