nymaim | ab4dc52d1b8ba682e617d278a0c72855b0f3a1ae75bd35bd7dd6a540306cbbfe

Analysis

max time kernel
160s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
04/12/2022, 18:33

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 3.6MB
Sample221204-w68cvaec75
SHA256 ab4dc52d1b8ba682e617d278a0c72855b0f3a1ae75bd35bd7dd6a540306cbbfe
MD5 7a0e26711c56593e28446a3fa2d41279
SHA1 0883f962bf8ba49f173364c5d9c5d45e0239ee35
SHA512 b1d10c5680eec7f8f7c7900a3d104860f4b10bb4243e7e564f69c970d206d927929f36618d945de20e855e5f7d18bcecba424293231f0c7ceee01fc8dfc3d528
SSDEEP 98304:s0p7Pn/IdD3rpD/ZRh/Rd1KO9Of+QUUALvsjrK1Xcyk:N7PEl9JKcOf+QUUADyQXcyk
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
1892	is-NB00T.tmp
2656	PrintFolders.exe
4348	OUl04d8GbaPB.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-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1892	is-NB00T.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 System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{3D003722-57B0-4A52-93EE-5B094539844E}.catalogItem	svchost.exe
File created	C:\Windows\system32\config\systemprofile\AppData\Local\Microsoft\InstallService\{49FBAA35-37EE-4222-A830-8D564C24D763}.catalogItem	svchost.exe

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NB00T.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ABRIJ.tmp	is-NB00T.tmp
File created	C:\Program Files (x86)\PrintFolders\is-G0H63.tmp	is-NB00T.tmp
File created	C:\Program Files (x86)\PrintFolders\is-O7910.tmp	is-NB00T.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LS97H.tmp	is-NB00T.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2E6KS.tmp	is-NB00T.tmp
File created	C:\Program Files (x86)\PrintFolders\is-2MG8S.tmp	is-NB00T.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-NB00T.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-NB00T.tmp

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

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	svchost.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	svchost.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	svchost.exe

Kills process with taskkill 1 IoCs

evasion

pid	Process
748	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2656	PrintFolders.exe
2656	PrintFolders.exe
2656	PrintFolders.exe
2656	PrintFolders.exe
2656	PrintFolders.exe
2656	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	748	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 1892	1152	file.exe	75
PID 1152 wrote to memory of 1892	1152	file.exe	75
PID 1152 wrote to memory of 1892	1152	file.exe	75
PID 1892 wrote to memory of 2656	1892	is-NB00T.tmp	76
PID 1892 wrote to memory of 2656	1892	is-NB00T.tmp	76
PID 1892 wrote to memory of 2656	1892	is-NB00T.tmp	76
PID 2656 wrote to memory of 4348	2656	PrintFolders.exe	77
PID 2656 wrote to memory of 4348	2656	PrintFolders.exe	77
PID 2656 wrote to memory of 4348	2656	PrintFolders.exe	77
PID 2656 wrote to memory of 316	2656	PrintFolders.exe	86
PID 2656 wrote to memory of 316	2656	PrintFolders.exe	86
PID 2656 wrote to memory of 316	2656	PrintFolders.exe	86
PID 316 wrote to memory of 748	316	cmd.exe	88
PID 316 wrote to memory of 748	316	cmd.exe	88
PID 316 wrote to memory of 748	316	cmd.exe	88

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Users\Admin\AppData\Local\Temp\is-MIUJU.tmp\is-NB00T.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-MIUJU.tmp\is-NB00T.tmp" /SL4 $F0062 "C:\Users\Admin\AppData\Local\Temp\file.exe" 3556104 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1892
- - 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:2656
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\OUl04d8GbaPB.exe
      4⤵
      Executes dropped EXE
      PID:4348
  - - 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:316
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:748

C:\Windows\System32\svchost.exe
C:\Windows\System32\svchost.exe -k netsvcs -p
1⤵
- Drops file in System32 directory
- Checks processor information in registry
- Enumerates system info in registry
PID:5020

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

Loading Replay Monitor...

Downloads

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.0MB
SHA256 6073ca990b52506f2e4a554e7089be3bbc2a385805f2e3dcf444f2b986f7e7df
MD5 6ab1400e9933f10df2261bcef23a65c3
SHA1 0001a603bf9371e5302cdbcd534b75cbacd0d5da
SHA512 bfd068f25d2e6b1ed8dd91afc04f49475960ee48e07ae44b59512ae076ddb67654bd51c0690cb13396678d3c61e47c8a4518635d8424f1bab82d05fd7ff48845
SSDEEP 49152:+vFjp8ytqDqQ2e+H+OjXpniybkSlssujgQWLL354UGyvgy0vORoSZMha2qMatN:+tjd75PniyBESPqUGyvg71SOha2qptN
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 6.0MB
SHA256 6073ca990b52506f2e4a554e7089be3bbc2a385805f2e3dcf444f2b986f7e7df
MD5 6ab1400e9933f10df2261bcef23a65c3
SHA1 0001a603bf9371e5302cdbcd534b75cbacd0d5da
SHA512 bfd068f25d2e6b1ed8dd91afc04f49475960ee48e07ae44b59512ae076ddb67654bd51c0690cb13396678d3c61e47c8a4518635d8424f1bab82d05fd7ff48845
SSDEEP 49152:+vFjp8ytqDqQ2e+H+OjXpniybkSlssujgQWLL354UGyvgy0vORoSZMha2qMatN:+tjd75PniyBESPqUGyvg71SOha2qptN
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

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

Submit Download

is-NB00T.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MIUJU.tmp\is-NB00T.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-NB00T.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-MIUJU.tmp\is-NB00T.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

OUl04d8GbaPB.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\OUl04d8GbaPB.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

OUl04d8GbaPB.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\OUl04d8GbaPB.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

memory/1152-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/1152-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/1152-137-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/2656-143-0x0000000000400000-0x00000000017F8000-memory.dmp

Download

memory/2656-148-0x0000000000400000-0x00000000017F8000-memory.dmp

Download

memory/2656-149-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/2656-144-0x0000000000400000-0x00000000017F8000-memory.dmp

Download

memory/2656-154-0x0000000000400000-0x00000000017F8000-memory.dmp

Download

memory/2656-142-0x0000000000400000-0x00000000017F8000-memory.dmp

Download