nymaim | df54de4b0ea08536e463b18e1b2d7bb11b0c2e08d1a4c551008cb146f2c02240

Analysis

max time kernel
155s
max time network
160s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
22/11/2022, 05:17

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 1.3MB
Sample221122-fypmrsbc38
SHA256 df54de4b0ea08536e463b18e1b2d7bb11b0c2e08d1a4c551008cb146f2c02240
MD5 855c6f8cd01ad94c1b597ed3480eb1cf
SHA1 d689326cc234fcfb587aa95217ad081c48c91919
SHA512 9ea1519ccdcd1020533f9c996cd2fbaad69548553b6283e14607145495c36189fdf8233de1380b55829131e4edf55199384cde4cccda5f45d761f1e5f3638ff1
SSDEEP 24576:pizc3EXyo5uxwUCj5+cRoctHwOn7WO8piDMJ0W464VFEN8pJgZIY7eCLxYis:iqEXyo0yBtQO7WLFrKFEN0WNeVis
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
4508	is-5OGPK.tmp
4256	PrintFolders.exe
4156	RCuYA6UWiP1.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-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
4508	is-5OGPK.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 opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-5OGPK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-Q2T7P.tmp	is-5OGPK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KTBB5.tmp	is-5OGPK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UAJ5N.tmp	is-5OGPK.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-5OGPK.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-5OGPK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-RM7IC.tmp	is-5OGPK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-792L7.tmp	is-5OGPK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NQPFH.tmp	is-5OGPK.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
3240	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4256	PrintFolders.exe
4256	PrintFolders.exe
4256	PrintFolders.exe
4256	PrintFolders.exe
4256	PrintFolders.exe
4256	PrintFolders.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4256	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3240	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4160 wrote to memory of 4508	4160	file.exe	82
PID 4160 wrote to memory of 4508	4160	file.exe	82
PID 4160 wrote to memory of 4508	4160	file.exe	82
PID 4508 wrote to memory of 4256	4508	is-5OGPK.tmp	83
PID 4508 wrote to memory of 4256	4508	is-5OGPK.tmp	83
PID 4508 wrote to memory of 4256	4508	is-5OGPK.tmp	83
PID 4256 wrote to memory of 4156	4256	PrintFolders.exe	84
PID 4256 wrote to memory of 4156	4256	PrintFolders.exe	84
PID 4256 wrote to memory of 4156	4256	PrintFolders.exe	84
PID 4256 wrote to memory of 1464	4256	PrintFolders.exe	93
PID 4256 wrote to memory of 1464	4256	PrintFolders.exe	93
PID 4256 wrote to memory of 1464	4256	PrintFolders.exe	93
PID 1464 wrote to memory of 3240	1464	cmd.exe	95
PID 1464 wrote to memory of 3240	1464	cmd.exe	95
PID 1464 wrote to memory of 3240	1464	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4160
- C:\Users\Admin\AppData\Local\Temp\is-BV50H.tmp\is-5OGPK.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-BV50H.tmp\is-5OGPK.tmp" /SL4 $B01BC "C:\Users\Admin\AppData\Local\Temp\file.exe" 1089485 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4508
- - 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:4256
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\RCuYA6UWiP1.exe
      4⤵
      Executes dropped EXE
      PID:4156
  - - 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:1464
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3240

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 1.5MB
SHA256 467ac0e34c9cb424053cb55841666a178ec9d3aa44af79bac1f81e002d402625
MD5 648bf68c5944b96d805fcb0f13edec00
SHA1 89818592c198ba0b937aca0131c15b8c5ff2f344
SHA512 770469453a1a0bc8a20c2dd98f84fbcba9a697b7342724d9c7f09405f60ac7f05a5bd25845628e58e938cfa71f59b5d525c4671439eb770f4a49b3a164566378
SSDEEP 24576:V+0e+JZ+9DT+tF2J+Rua+CMF4T+N3frn+4rSJ0g45wcFGXbMliGn3LLVQSacC2py:UqJ49DKtkIECmFr+4rg0iI7n3LLVQRFB
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 1.5MB
SHA256 467ac0e34c9cb424053cb55841666a178ec9d3aa44af79bac1f81e002d402625
MD5 648bf68c5944b96d805fcb0f13edec00
SHA1 89818592c198ba0b937aca0131c15b8c5ff2f344
SHA512 770469453a1a0bc8a20c2dd98f84fbcba9a697b7342724d9c7f09405f60ac7f05a5bd25845628e58e938cfa71f59b5d525c4671439eb770f4a49b3a164566378
SSDEEP 24576:V+0e+JZ+9DT+tF2J+Rua+CMF4T+N3frn+4rSJ0g45wcFGXbMliGn3LLVQSacC2py:UqJ49DKtkIECmFr+4rg0iI7n3LLVQRFB
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

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

Submit Download

is-5OGPK.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-BV50H.tmp\is-5OGPK.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-5OGPK.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-BV50H.tmp\is-5OGPK.tmp
Size 643KB
SHA256 1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7
MD5 85b94e72c3f2d2b5464e2aaf3c9e242a
SHA1 ce7ccae5f50a990d059d59292d4a332979e162ba
SHA512 c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880
SSDEEP 12288:Oh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrvJxO0:05NoqWolrP837JzHvA6yknyWFxvJxO0
MD5 SHA1 SHA512 SSDEEP

Submit Download

RCuYA6UWiP1.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\RCuYA6UWiP1.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

RCuYA6UWiP1.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\RCuYA6UWiP1.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/4160-147-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4160-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4160-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4160-134-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/4256-143-0x0000000000400000-0x0000000001378000-memory.dmp

Download

memory/4256-148-0x0000000000400000-0x0000000001378000-memory.dmp

Download

memory/4256-149-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/4256-142-0x0000000000400000-0x0000000001378000-memory.dmp

Download

memory/4256-155-0x0000000000400000-0x0000000001378000-memory.dmp

Download