nymaim | 5e565c729ee20159073946b5d8a5f83b946ece8d8884e6ca4aad694bd3777d9e

Analysis

max time kernel
51s
max time network
104s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
15/12/2022, 04:03

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
file.exe
Size 2.2MB
Sample221215-emcndsef5s
SHA256 5e565c729ee20159073946b5d8a5f83b946ece8d8884e6ca4aad694bd3777d9e
MD5 76f915e0729e6bd0b0d6f166d843d549
SHA1 daba28c6e9752077ac9c5f3787a73a9f85642cb3
SHA512 b683fb624839b7ded4119b2c24e1464a1fa1f3f79a3bd753ea0b2cc049303277bfa548fd7a1379dd4f7c0bdf73c23609b2cd6a007840bd49f2496a379ba6b74c
SSDEEP 49152:oNur/EcezxUw13aDLT9i5gPtyAYnx6qJLtBBh73of9geOCgSY/L:oNy/exUwJqLZ1PbOx6MLtBBh7a9gcY/L
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
1108	is-8EOEJ.tmp
5040	nzFolders.exe
1780	aO6eEo.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	nzFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1108	is-8EOEJ.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-3GF82.tmp	is-8EOEJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-0FFD6.tmp	is-8EOEJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-AVL86.tmp	is-8EOEJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NFRVO.tmp	is-8EOEJ.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\nzFolders.exe	is-8EOEJ.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-8EOEJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-L7VGD.tmp	is-8EOEJ.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-8EOEJ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-KPKR2.tmp	is-8EOEJ.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
4116	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5040	nzFolders.exe
5040	nzFolders.exe
5040	nzFolders.exe
5040	nzFolders.exe
5040	nzFolders.exe
5040	nzFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4116	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4568 wrote to memory of 1108	4568	file.exe	81
PID 4568 wrote to memory of 1108	4568	file.exe	81
PID 4568 wrote to memory of 1108	4568	file.exe	81
PID 1108 wrote to memory of 5040	1108	is-8EOEJ.tmp	82
PID 1108 wrote to memory of 5040	1108	is-8EOEJ.tmp	82
PID 1108 wrote to memory of 5040	1108	is-8EOEJ.tmp	82
PID 5040 wrote to memory of 1780	5040	nzFolders.exe	83
PID 5040 wrote to memory of 1780	5040	nzFolders.exe	83
PID 5040 wrote to memory of 1780	5040	nzFolders.exe	83
PID 5040 wrote to memory of 1888	5040	nzFolders.exe	91
PID 5040 wrote to memory of 1888	5040	nzFolders.exe	91
PID 5040 wrote to memory of 1888	5040	nzFolders.exe	91
PID 1888 wrote to memory of 4116	1888	cmd.exe	93
PID 1888 wrote to memory of 4116	1888	cmd.exe	93
PID 1888 wrote to memory of 4116	1888	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4568
- C:\Users\Admin\AppData\Local\Temp\is-TMTMN.tmp\is-8EOEJ.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-TMTMN.tmp\is-8EOEJ.tmp" /SL4 $8004A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2083334 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1108
- - C:\Program Files (x86)\PrintFolders\nzFolders.exe
    "C:\Program Files (x86)\PrintFolders\nzFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:5040
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\aO6eEo.exe
      4⤵
      Executes dropped EXE
      PID:1780
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "nzFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\nzFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1888
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "nzFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4116

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

nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 4e075d724ae29ec79c69a9cb10997b77a064a97eb572591351d0ce5cc2ad1b2c
MD5 1e7620fe28c986221fc7545b0a2e8066
SHA1 857290b2f282c5a49d82489d355163f59e0d4a4e
SHA512 1c21f6690a9f62481abf6b19b69b1a77a3d5ec59bbc36c041916b464ac7555f846104a51dd21e52b4403d6417548fd765a7f37cd8f981b7f489d98d637fb9fc3
SSDEEP 98304:s/+yWqAY4k/+fAayDtyfG2cqNu93+xWq9IjFqvIXyqoco:tD7fAaSo
MD5 SHA1 SHA512 SSDEEP

Submit Download

nzFolders.exe

Path C:\Program Files (x86)\PrintFolders\nzFolders.exe
Size 3.3MB
SHA256 4e075d724ae29ec79c69a9cb10997b77a064a97eb572591351d0ce5cc2ad1b2c
MD5 1e7620fe28c986221fc7545b0a2e8066
SHA1 857290b2f282c5a49d82489d355163f59e0d4a4e
SHA512 1c21f6690a9f62481abf6b19b69b1a77a3d5ec59bbc36c041916b464ac7555f846104a51dd21e52b4403d6417548fd765a7f37cd8f981b7f489d98d637fb9fc3
SSDEEP 98304:s/+yWqAY4k/+fAayDtyfG2cqNu93+xWq9IjFqvIXyqoco:tD7fAaSo
MD5 SHA1 SHA512 SSDEEP

Submit Download

_iscrypt.dll

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

Submit Download

is-8EOEJ.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-TMTMN.tmp\is-8EOEJ.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

Submit Download

is-8EOEJ.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-TMTMN.tmp\is-8EOEJ.tmp
Size 797KB
SHA256 424fb4432fa651db203c38efd930813c49e90f506a7f5465347eff4eda44a711
MD5 fc4bab9305f2a869cb26d22e008f2921
SHA1 9871140128ea98e2cc798f3ef4c3cd546442969f
SHA512 bcaff0260b9cb2a6c3d7aabb7d1b1e02ca8968cdb0715f78db93755b44aa18e8f146b9052dc7fcf54796f044cf779cb989d34db8c17cf9eca53b30acfc708506
SSDEEP 24576:n5NoqWolrP837JzHvA6yknyWFxvSur/TxOu:njrP837JzHvA6pnvFxvSur/1p
MD5 SHA1 SHA512 SSDEEP

Submit Download

aO6eEo.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\aO6eEo.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

Submit Download

aO6eEo.exe

Path C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\aO6eEo.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/4568-151-0x0000000000400000-0x0000000000439000-memory.dmp

Download

memory/4568-132-0x0000000000400000-0x0000000000439000-memory.dmp

Download

memory/4568-134-0x0000000000400000-0x0000000000439000-memory.dmp

Download

memory/4568-156-0x0000000000400000-0x0000000000439000-memory.dmp

Download

memory/5040-143-0x0000000000400000-0x0000000001548000-memory.dmp

Download

memory/5040-142-0x0000000000400000-0x0000000001548000-memory.dmp

Download

memory/5040-147-0x0000000010000000-0x000000001001B000-memory.dmp

Download

memory/5040-152-0x0000000000400000-0x0000000001548000-memory.dmp

Download

memory/5040-155-0x0000000000400000-0x0000000001548000-memory.dmp

Download