nymaim | 4905ed016a0741d784ea14ede7bc07dbc2147fb8f313268cbbb381ca83d1db88

Analysis

max time kernel
147s
max time network
148s
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, 15:47

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.1MB
Sample221201-s784zsdb93
SHA256 4905ed016a0741d784ea14ede7bc07dbc2147fb8f313268cbbb381ca83d1db88
MD5 7149ef81c18be46ecc7a78b4bbcea8e3
SHA1 a5b6873d237133735e3556eeac97decc09cb3438
SHA512 23d23efba059cab2e660df68da813b3ed4860b80058a4f4d119feeb4f230286418446a30433bb0f9e0704ad3c5bd7e877d401b9ff640fbf488aa1ccaccb95104
SSDEEP 49152:QZI8kSQinlM98fY7nPYJV1XNcHvkHK3qgrAG5cyw:QaZeOAzdcPJagrXcyw
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
5032	is-H7OVK.tmp
3836	PrintFolders.exe
4156	ToTf4xWniMO.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
5032	is-H7OVK.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-H7OVK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8FG39.tmp	is-H7OVK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-G10FR.tmp	is-H7OVK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KM6KT.tmp	is-H7OVK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-52IDD.tmp	is-H7OVK.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-H7OVK.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-H7OVK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KJM48.tmp	is-H7OVK.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VDT3O.tmp	is-H7OVK.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
1004	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3836	PrintFolders.exe
3836	PrintFolders.exe
3836	PrintFolders.exe
3836	PrintFolders.exe
3836	PrintFolders.exe
3836	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1004	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2732 wrote to memory of 5032	2732	file.exe	76
PID 2732 wrote to memory of 5032	2732	file.exe	76
PID 2732 wrote to memory of 5032	2732	file.exe	76
PID 5032 wrote to memory of 3836	5032	is-H7OVK.tmp	77
PID 5032 wrote to memory of 3836	5032	is-H7OVK.tmp	77
PID 5032 wrote to memory of 3836	5032	is-H7OVK.tmp	77
PID 3836 wrote to memory of 4156	3836	PrintFolders.exe	78
PID 3836 wrote to memory of 4156	3836	PrintFolders.exe	78
PID 3836 wrote to memory of 4156	3836	PrintFolders.exe	78
PID 3836 wrote to memory of 3004	3836	PrintFolders.exe	88
PID 3836 wrote to memory of 3004	3836	PrintFolders.exe	88
PID 3836 wrote to memory of 3004	3836	PrintFolders.exe	88
PID 3004 wrote to memory of 1004	3004	cmd.exe	90
PID 3004 wrote to memory of 1004	3004	cmd.exe	90
PID 3004 wrote to memory of 1004	3004	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:2732
- C:\Users\Admin\AppData\Local\Temp\is-ANTLH.tmp\is-H7OVK.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-ANTLH.tmp\is-H7OVK.tmp" /SL4 $801BE "C:\Users\Admin\AppData\Local\Temp\file.exe" 1916884 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:5032
- - 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:3836
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\ToTf4xWniMO.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:3004
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1004

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 3.2MB
SHA256 9baa9c5dd4a6b05ba7a3c3c33cca9616b9c9c866d973b7bd46e505c37e3d6ea4
MD5 a240668bf17ef1519151ae177cb6b8cc
SHA1 6821e01338f661b2594897e678ec23b1fad42257
SHA512 e5bdafe6ddbec8b7617819841f35f8fc1f74f0c9f0bfcc895c5e074dd2c8ab5cf80048cef6f885f23d4df93c6ac36f5b0f7689f3d10ef5cf1315c2695a63f147
SSDEEP 49152:14V2LwrTfnKyOQXzk6TkDV0E3piCP+OUkZ8Vs:W2ErTfKXQXzk6TQV0EZiCP+OU28Vs
MD5 SHA1 SHA512 SSDEEP

Submit Download

PrintFolders.exe

Path C:\Program Files (x86)\PrintFolders\PrintFolders.exe
Size 3.2MB
SHA256 9baa9c5dd4a6b05ba7a3c3c33cca9616b9c9c866d973b7bd46e505c37e3d6ea4
MD5 a240668bf17ef1519151ae177cb6b8cc
SHA1 6821e01338f661b2594897e678ec23b1fad42257
SHA512 e5bdafe6ddbec8b7617819841f35f8fc1f74f0c9f0bfcc895c5e074dd2c8ab5cf80048cef6f885f23d4df93c6ac36f5b0f7689f3d10ef5cf1315c2695a63f147
SSDEEP 49152:14V2LwrTfnKyOQXzk6TkDV0E3piCP+OUkZ8Vs:W2ErTfKXQXzk6TQV0EZiCP+OU28Vs
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-A2IDQ.tmp\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

Submit Download

is-H7OVK.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-ANTLH.tmp\is-H7OVK.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-H7OVK.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-ANTLH.tmp\is-H7OVK.tmp
Size 643KB
SHA256 b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021
MD5 363a4d2aa5d6cf5cbb2267cccf0c4436
SHA1 a4cdb756698ed28f522956166a6292e9e309dd9c
SHA512 b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70
SSDEEP 12288:Jh5UooqWolrP837JzHvA6izJgnnyFNmayiAZrv4xp:f5NoqWolrP837JzHvA6yknyWFxv4xp
MD5 SHA1 SHA512 SSDEEP

Submit Download

ToTf4xWniMO.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\ToTf4xWniMO.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

ToTf4xWniMO.exe

Path C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\ToTf4xWniMO.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/2732-156-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/2732-137-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/2732-132-0x0000000000400000-0x0000000000413000-memory.dmp

Download

memory/3836-143-0x0000000000400000-0x0000000001535000-memory.dmp

Download

memory/3836-144-0x0000000000400000-0x0000000001535000-memory.dmp

Download

memory/3836-148-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/3836-152-0x0000000000400000-0x0000000001535000-memory.dmp

Download

memory/3836-142-0x0000000000400000-0x0000000001535000-memory.dmp

Download

memory/3836-155-0x0000000000400000-0x0000000001535000-memory.dmp

Download