nymaim | bff939648dfb3a9e20d20ce04f6f9e4dbdbc0bb96b6147b5a4a301cce28ec80e

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
16/12/2022, 16:46

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General

Target
file.exe
Size 2.3MB
Sample221216-t9ylpsfa88
SHA256 bff939648dfb3a9e20d20ce04f6f9e4dbdbc0bb96b6147b5a4a301cce28ec80e
MD5 eb6522f897daa4b5f205b3095fbba9c3
SHA1 26e9fbb8117b8191924cd212d074218e17e9f142
SHA512 b0aff1b736abbc1ae4e02407fcb5d1806889d98600caec9bed3e0012dea016372205cbbd748355f6a5e3c40f0397fc32ebb97e7015db28b8f3f41b73e7150cbe
SSDEEP 49152:UpJWOSa0TcCW3QNh9dR4kSWjBaDRnN0jcyddQDZ74h4dAP66RXeOCgSY/imF:UpD0hWeP0WjcDX0AKdQDZ7WYyRXcY/iY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
924	is-LI4HV.tmp
1296	oaFolders.exe
4812	xOcUARDfAEZM9P.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	oaFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
924	is-LI4HV.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-2UG63.tmp	is-LI4HV.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-LI4HV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-70EBN.tmp	is-LI4HV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VHKCB.tmp	is-LI4HV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-7F0UJ.tmp	is-LI4HV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-GEM8V.tmp	is-LI4HV.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-LI4HV.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\oaFolders.exe	is-LI4HV.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2HRG2.tmp	is-LI4HV.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
764	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1296	oaFolders.exe
1296	oaFolders.exe
1296	oaFolders.exe
1296	oaFolders.exe
1296	oaFolders.exe
1296	oaFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	764	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5096 wrote to memory of 924	5096	file.exe	79
PID 5096 wrote to memory of 924	5096	file.exe	79
PID 5096 wrote to memory of 924	5096	file.exe	79
PID 924 wrote to memory of 1296	924	is-LI4HV.tmp	80
PID 924 wrote to memory of 1296	924	is-LI4HV.tmp	80
PID 924 wrote to memory of 1296	924	is-LI4HV.tmp	80
PID 1296 wrote to memory of 4812	1296	oaFolders.exe	81
PID 1296 wrote to memory of 4812	1296	oaFolders.exe	81
PID 1296 wrote to memory of 4812	1296	oaFolders.exe	81
PID 1296 wrote to memory of 996	1296	oaFolders.exe	89
PID 1296 wrote to memory of 996	1296	oaFolders.exe	89
PID 1296 wrote to memory of 996	1296	oaFolders.exe	89
PID 996 wrote to memory of 764	996	cmd.exe	91
PID 996 wrote to memory of 764	996	cmd.exe	91
PID 996 wrote to memory of 764	996	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5096
- C:\Users\Admin\AppData\Local\Temp\is-HANAO.tmp\is-LI4HV.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-HANAO.tmp\is-LI4HV.tmp" /SL4 $A0066 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2153573 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:924
- - C:\Program Files (x86)\PrintFolders\oaFolders.exe
    "C:\Program Files (x86)\PrintFolders\oaFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1296
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\xOcUARDfAEZM9P.exe
      4⤵
      Executes dropped EXE
      PID:4812
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "oaFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\oaFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:996
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "oaFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:764

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

oaFolders.exe

Path C:\Program Files (x86)\PrintFolders\oaFolders.exe
Size 3.4MB
SHA256 790bae94133c9d9b09d1b15a6cc5eb9b5cffcbc496f1b8cf65fd82f14e86d3ab
MD5 3000bc5300feec2d2ede93aeb3677706
SHA1 b0bc54c6118f8ac5d5f4abe1d90e02ee33a166b0
SHA512 a2e82d6f8d3a6345d6789ae07ed26e8b71c5d076218d2d4683417935d058b2561c0ae0844c560613ed983fa144e4f979274687f0eda74537c6a327378a47670f
SSDEEP 49152:5CuX5y1yLN7/7vrjfI6FFc8kOrhT4C0Cyv1x0f:5ZX5y1cN7/TffIkFFprhT4CFyv1xi
MD5 SHA1 SHA512 SSDEEP

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oaFolders.exe

Path C:\Program Files (x86)\PrintFolders\oaFolders.exe
Size 3.4MB
SHA256 790bae94133c9d9b09d1b15a6cc5eb9b5cffcbc496f1b8cf65fd82f14e86d3ab
MD5 3000bc5300feec2d2ede93aeb3677706
SHA1 b0bc54c6118f8ac5d5f4abe1d90e02ee33a166b0
SHA512 a2e82d6f8d3a6345d6789ae07ed26e8b71c5d076218d2d4683417935d058b2561c0ae0844c560613ed983fa144e4f979274687f0eda74537c6a327378a47670f
SSDEEP 49152:5CuX5y1yLN7/7vrjfI6FFc8kOrhT4C0Cyv1x0f:5ZX5y1cN7/TffIkFFprhT4CFyv1xi
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-AOG16.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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is-LI4HV.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-HANAO.tmp\is-LI4HV.tmp
Size 797KB
SHA256 d0df1c119b09c7d2d6973428d794379d2366077185206e4787d76a0c35267d96
MD5 33067bd40abffd83261cc0aff0298b85
SHA1 f492c02df1ef097c24d2e93d3a80fa521e3d767e
SHA512 89b014df03a157b565009e96ec9a4520fc12412404ed5420b5a540bb5aca6a60352996c91e5b81c235f93dd1a5412fb79a84b30038913f103a78249384e8f648
SSDEEP 12288:Bh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvyzxxOu:n5NoqWolrP837JzHvA6yknyWFxvuxxOu
MD5 SHA1 SHA512 SSDEEP

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is-LI4HV.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-HANAO.tmp\is-LI4HV.tmp
Size 797KB
SHA256 d0df1c119b09c7d2d6973428d794379d2366077185206e4787d76a0c35267d96
MD5 33067bd40abffd83261cc0aff0298b85
SHA1 f492c02df1ef097c24d2e93d3a80fa521e3d767e
SHA512 89b014df03a157b565009e96ec9a4520fc12412404ed5420b5a540bb5aca6a60352996c91e5b81c235f93dd1a5412fb79a84b30038913f103a78249384e8f648
SSDEEP 12288:Bh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvyzxxOu:n5NoqWolrP837JzHvA6yknyWFxvuxxOu
MD5 SHA1 SHA512 SSDEEP

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xOcUARDfAEZM9P.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\xOcUARDfAEZM9P.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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xOcUARDfAEZM9P.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\xOcUARDfAEZM9P.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/1296-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/1296-144-0x0000000000400000-0x000000000156E000-memory.dmp

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memory/1296-142-0x0000000000400000-0x000000000156E000-memory.dmp

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memory/1296-143-0x0000000000400000-0x000000000156E000-memory.dmp

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memory/1296-152-0x0000000000400000-0x000000000156E000-memory.dmp

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memory/1296-155-0x0000000000400000-0x000000000156E000-memory.dmp

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memory/5096-132-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/5096-138-0x0000000000400000-0x0000000000439000-memory.dmp

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memory/5096-156-0x0000000000400000-0x0000000000439000-memory.dmp

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