nymaim | 19bc5c10f2c5687ea4f588ad903bef40d4d6a5a9e6da36e0ea16b3ddfaf98768

Analysis

max time kernel
172s
max time network
190s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
30/11/2022, 22:17

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General

Target
file.exe
Size 2.0MB
Sample221130-17dbbade8s
SHA256 19bc5c10f2c5687ea4f588ad903bef40d4d6a5a9e6da36e0ea16b3ddfaf98768
MD5 a5c1ba5fd189ec43738443f75a077247
SHA1 fa435538a769a2738d21d716b829861ca01fe0ad
SHA512 0bbaa013c95f7c8909d4ba8a40dbc41bfc316ce3baa34a1e89b68d394bb7adc08f8930c666a4b45622edd455b409404e6475d6ca2aa4976d223b8d39eeea1244
SSDEEP 49152:4Z2bvrXkdiGf5CVZWgRUqWMrworumT3jiNUAG5cyf:4MvY0Gf58vUVMkofT3jiOXcyf
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
4776	is-S6FKO.tmp
4672	PrintFolders.exe
4428	Bh9Ga8.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
4776	is-S6FKO.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\unins000.dat	is-S6FKO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-835OQ.tmp	is-S6FKO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2GFH3.tmp	is-S6FKO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6JAFF.tmp	is-S6FKO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-S6FKO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-TBPD4.tmp	is-S6FKO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-5OAOF.tmp	is-S6FKO.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QV8NF.tmp	is-S6FKO.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-S6FKO.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
2996	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4672	PrintFolders.exe
4672	PrintFolders.exe
4672	PrintFolders.exe
4672	PrintFolders.exe
4672	PrintFolders.exe
4672	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4672	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2996	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 4776	5044	file.exe	78
PID 5044 wrote to memory of 4776	5044	file.exe	78
PID 5044 wrote to memory of 4776	5044	file.exe	78
PID 4776 wrote to memory of 4672	4776	is-S6FKO.tmp	79
PID 4776 wrote to memory of 4672	4776	is-S6FKO.tmp	79
PID 4776 wrote to memory of 4672	4776	is-S6FKO.tmp	79
PID 4672 wrote to memory of 4428	4672	PrintFolders.exe	80
PID 4672 wrote to memory of 4428	4672	PrintFolders.exe	80
PID 4672 wrote to memory of 4428	4672	PrintFolders.exe	80
PID 4672 wrote to memory of 2160	4672	PrintFolders.exe	88
PID 4672 wrote to memory of 2160	4672	PrintFolders.exe	88
PID 4672 wrote to memory of 2160	4672	PrintFolders.exe	88
PID 2160 wrote to memory of 2996	2160	cmd.exe	90
PID 2160 wrote to memory of 2996	2160	cmd.exe	90
PID 2160 wrote to memory of 2996	2160	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:5044
- C:\Users\Admin\AppData\Local\Temp\is-6ME24.tmp\is-S6FKO.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-6ME24.tmp\is-S6FKO.tmp" /SL4 $401D2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1910886 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4776
- - 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 behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:4672
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\Bh9Ga8.exe
      4⤵
      Executes dropped EXE
      PID:4428
  - - 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:2160
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2996

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 3.1MB
SHA256 535c82f562c0a0c310c7d18af105b2e67e3169cd6205f9ccd35e1fb8b787061b
MD5 b9ef55ae6236073ffade6400917f1c8f
SHA1 7281246b2d6222a8d5f3db3d9d24c7e63afe1c57
SHA512 4c6a2eee4ab1aa1a025d634e059d88a63b43df9d8a17f0273544033f4efd49cd79a9af0c2af7f9664e773624cb67df482ccad3bbf9f614b9a057878f13d3d386
SSDEEP 24576:21Iv1L2l791CNfLcOO9xRimAX/csQynsGISdtU3Tr0IfhDx5ZuLuRoekpJkkv3l3:QYL2lj9nApXldvEhDxzuLuAApls
MD5 SHA1 SHA512 SSDEEP

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PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.1MB
SHA256 535c82f562c0a0c310c7d18af105b2e67e3169cd6205f9ccd35e1fb8b787061b
MD5 b9ef55ae6236073ffade6400917f1c8f
SHA1 7281246b2d6222a8d5f3db3d9d24c7e63afe1c57
SHA512 4c6a2eee4ab1aa1a025d634e059d88a63b43df9d8a17f0273544033f4efd49cd79a9af0c2af7f9664e773624cb67df482ccad3bbf9f614b9a057878f13d3d386
SSDEEP 24576:21Iv1L2l791CNfLcOO9xRimAX/csQynsGISdtU3Tr0IfhDx5ZuLuRoekpJkkv3l3:QYL2lj9nApXldvEhDxzuLuAApls
MD5 SHA1 SHA512 SSDEEP

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is-S6FKO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-6ME24.tmp\is-S6FKO.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

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is-S6FKO.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-6ME24.tmp\is-S6FKO.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-ICCL8.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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Bh9Ga8.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\Bh9Ga8.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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Bh9Ga8.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\Bh9Ga8.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/4672-145-0x0000000000400000-0x000000000151B000-memory.dmp

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memory/4672-144-0x0000000000400000-0x000000000151B000-memory.dmp

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memory/4672-143-0x0000000000400000-0x000000000151B000-memory.dmp

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memory/4672-142-0x0000000000400000-0x000000000151B000-memory.dmp

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memory/4672-149-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4672-155-0x0000000000400000-0x000000000151B000-memory.dmp

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memory/5044-132-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/5044-137-0x0000000000400000-0x0000000000413000-memory.dmp

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memory/5044-156-0x0000000000400000-0x0000000000413000-memory.dmp

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