nymaim | b58f628e872920f897219c708e392bfc462d222141df1abf80380a64e63c4dee

Analysis

max time kernel
82s
max time network
131s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
01/12/2022, 11:16

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General

Target
file.exe
Size 2.0MB
Sample221201-nc7v8ace96
SHA256 b58f628e872920f897219c708e392bfc462d222141df1abf80380a64e63c4dee
MD5 14d13cee3becffc46c9c6bec65e702c7
SHA1 1f0bc6229fc2ec8c14eb603184ec4ec497f99de6
SHA512 a7eca210a6c52cd615f64ad5a09a179bb5600408fcf80ed6ff270941301b9b5ef1d9d0dd212efe63d92c1682d9b709bc55bf104a175b2dbeaaf84654aaf4cd38
SSDEEP 49152:c/ZEK3c2I9+FEybK7B28rzS4635/3SFefxivRIzKHAG5cyg:c/2+xcDykB28ru5vSFefUvR9HXcyg
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
2252	is-FI4PG.tmp
988	PrintFolders.exe
4744	3HmdbJw.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	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2252	is-FI4PG.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-BU6GT.tmp	is-FI4PG.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-FI4PG.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-FI4PG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ORI8I.tmp	is-FI4PG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-FPOMN.tmp	is-FI4PG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QSILR.tmp	is-FI4PG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-25TAL.tmp	is-FI4PG.tmp
File created	C:\Program Files (x86)\PrintFolders\is-DE07F.tmp	is-FI4PG.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-FI4PG.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
1628	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
988	PrintFolders.exe
988	PrintFolders.exe
988	PrintFolders.exe
988	PrintFolders.exe
988	PrintFolders.exe
988	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1628	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 2252	2764	file.exe	81
PID 2764 wrote to memory of 2252	2764	file.exe	81
PID 2764 wrote to memory of 2252	2764	file.exe	81
PID 2252 wrote to memory of 988	2252	is-FI4PG.tmp	82
PID 2252 wrote to memory of 988	2252	is-FI4PG.tmp	82
PID 2252 wrote to memory of 988	2252	is-FI4PG.tmp	82
PID 988 wrote to memory of 4744	988	PrintFolders.exe	83
PID 988 wrote to memory of 4744	988	PrintFolders.exe	83
PID 988 wrote to memory of 4744	988	PrintFolders.exe	83
PID 988 wrote to memory of 4576	988	PrintFolders.exe	85
PID 988 wrote to memory of 4576	988	PrintFolders.exe	85
PID 988 wrote to memory of 4576	988	PrintFolders.exe	85
PID 4576 wrote to memory of 1628	4576	cmd.exe	87
PID 4576 wrote to memory of 1628	4576	cmd.exe	87
PID 4576 wrote to memory of 1628	4576	cmd.exe	87

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Users\Admin\AppData\Local\Temp\is-HMQ30.tmp\is-FI4PG.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-HMQ30.tmp\is-FI4PG.tmp" /SL4 $30028 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1903046 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2252
- - 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:988
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\3HmdbJw.exe
      4⤵
      Executes dropped EXE
      PID:4744
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4576
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1628

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

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 9a10a46a15df035bfc51b5a037a753c5eeb93c1225d6c0b87e0573aed08584a2
MD5 3295ae2696daca51a2b95af7ec6846ad
SHA1 5d9acec2c01b4989679e84e289c0d62d414a4afc
SHA512 b1e78e8324328c3e70b4befe6400e0ff4699abeee80ceb2c8a3740d93c576bad334023d8631239806fd47cf404cdebb03cb899e4949c658c71e6a22d73ee87ba
SSDEEP 49152:uw14yLlXWcAmyl61XOiRDtuIKEkJ8IwPH/:XyyBXWcAmyl61eiNtuIV6pw3
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 9a10a46a15df035bfc51b5a037a753c5eeb93c1225d6c0b87e0573aed08584a2
MD5 3295ae2696daca51a2b95af7ec6846ad
SHA1 5d9acec2c01b4989679e84e289c0d62d414a4afc
SHA512 b1e78e8324328c3e70b4befe6400e0ff4699abeee80ceb2c8a3740d93c576bad334023d8631239806fd47cf404cdebb03cb899e4949c658c71e6a22d73ee87ba
SSDEEP 49152:uw14yLlXWcAmyl61XOiRDtuIKEkJ8IwPH/:XyyBXWcAmyl61eiNtuIV6pw3
MD5 SHA1 SHA512 SSDEEP

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is-FI4PG.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-HMQ30.tmp\is-FI4PG.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-FI4PG.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-HMQ30.tmp\is-FI4PG.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

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

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3HmdbJw.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\3HmdbJw.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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3HmdbJw.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\3HmdbJw.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/988-151-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/988-142-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/988-143-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/988-147-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/988-154-0x0000000000400000-0x0000000001535000-memory.dmp

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memory/2764-138-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2764-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/2764-155-0x0000000000400000-0x0000000000413000-memory.dmp

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