nymaim | f0853360e376af5dfa30c090ea6c91c9786351c3563b9026394d7aec1e218aa8

General

Target

file.exe
Size

2.5MB
MD5

78933cde5eb56e5217c397743e4aa677
SHA1

f2b2a93d483104271fd161298fe0503e5d8e657a
SHA256

f0853360e376af5dfa30c090ea6c91c9786351c3563b9026394d7aec1e218aa8
SHA512

3bcb3335d9aba55980b2ef861906d17317d36ea84c04a2fbf813d814f1390509152817ea13791d9060256b2d7bfa3adf68386aaad38098cc9e364fae5319b390
SSDEEP

49152:Ep6vYAiSX6oXMkkdwdlBiSHaMCFXQh2GuJdjrsHeOCgSY/imH:EpBKX6udlXhCeXuJScY/imH

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

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
2348	is-ENA0L.tmp
2388	oaFolders.exe
1192	k7oxf4QMNMq.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-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	oaFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
2348	is-ENA0L.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-H9A33.tmp	is-ENA0L.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9MDSJ.tmp	is-ENA0L.tmp
File created	C:\Program Files (x86)\PrintFolders\is-FP1J9.tmp	is-ENA0L.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\oaFolders.exe	is-ENA0L.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-ENA0L.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-ENA0L.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ECQPF.tmp	is-ENA0L.tmp
File created	C:\Program Files (x86)\PrintFolders\is-6A4RV.tmp	is-ENA0L.tmp
File created	C:\Program Files (x86)\PrintFolders\is-VPF3Q.tmp	is-ENA0L.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
2784	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2388	oaFolders.exe
2388	oaFolders.exe
2388	oaFolders.exe
2388	oaFolders.exe
2388	oaFolders.exe
2388	oaFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2784	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1524 wrote to memory of 2348	1524	file.exe	81
PID 1524 wrote to memory of 2348	1524	file.exe	81
PID 1524 wrote to memory of 2348	1524	file.exe	81
PID 2348 wrote to memory of 2388	2348	is-ENA0L.tmp	82
PID 2348 wrote to memory of 2388	2348	is-ENA0L.tmp	82
PID 2348 wrote to memory of 2388	2348	is-ENA0L.tmp	82
PID 2388 wrote to memory of 1192	2388	oaFolders.exe	84
PID 2388 wrote to memory of 1192	2388	oaFolders.exe	84
PID 2388 wrote to memory of 1192	2388	oaFolders.exe	84
PID 2388 wrote to memory of 3644	2388	oaFolders.exe	93
PID 2388 wrote to memory of 3644	2388	oaFolders.exe	93
PID 2388 wrote to memory of 3644	2388	oaFolders.exe	93
PID 3644 wrote to memory of 2784	3644	cmd.exe	95
PID 3644 wrote to memory of 2784	3644	cmd.exe	95
PID 3644 wrote to memory of 2784	3644	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:1524
- C:\Users\Admin\AppData\Local\Temp\is-DEJP0.tmp\is-ENA0L.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-DEJP0.tmp\is-ENA0L.tmp" /SL4 $C003E "C:\Users\Admin\AppData\Local\Temp\file.exe" 2294982 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2348
- - C:\Program Files (x86)\PrintFolders\oaFolders.exe
    "C:\Program Files (x86)\PrintFolders\oaFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2388
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\k7oxf4QMNMq.exe
      4⤵
      Executes dropped EXE
      PID:1192
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "oaFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\oaFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3644
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "oaFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2784

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\PrintFolders\oaFolders.exe

Filesize
3.6MB

MD5
7c34c008f697bc5e04212fddbf81932d

SHA1
91051589dd103d00b467b848d58dbe0e1c269880

SHA256
deef46c9523f97d2ce3a9d3d3914f73dd2d4a189638b140f0e7f0d9c5dfa4cba

SHA512
e7949e81927b337eabb978f200f1340881f9425a43a23f3f3ad5c38fd30adddd8e2f48556b11360086ebb90204f118e1966e5157b408e280d8ea436d7ca1a98c

Download Submit
C:\Program Files (x86)\PrintFolders\oaFolders.exe

Filesize
3.6MB

MD5
7c34c008f697bc5e04212fddbf81932d

SHA1
91051589dd103d00b467b848d58dbe0e1c269880

SHA256
deef46c9523f97d2ce3a9d3d3914f73dd2d4a189638b140f0e7f0d9c5dfa4cba

SHA512
e7949e81927b337eabb978f200f1340881f9425a43a23f3f3ad5c38fd30adddd8e2f48556b11360086ebb90204f118e1966e5157b408e280d8ea436d7ca1a98c

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3R66R.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-DEJP0.tmp\is-ENA0L.tmp

Filesize
797KB

MD5
33067bd40abffd83261cc0aff0298b85

SHA1
f492c02df1ef097c24d2e93d3a80fa521e3d767e

SHA256
d0df1c119b09c7d2d6973428d794379d2366077185206e4787d76a0c35267d96

SHA512
89b014df03a157b565009e96ec9a4520fc12412404ed5420b5a540bb5aca6a60352996c91e5b81c235f93dd1a5412fb79a84b30038913f103a78249384e8f648

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-DEJP0.tmp\is-ENA0L.tmp

Filesize
797KB

MD5
33067bd40abffd83261cc0aff0298b85

SHA1
f492c02df1ef097c24d2e93d3a80fa521e3d767e

SHA256
d0df1c119b09c7d2d6973428d794379d2366077185206e4787d76a0c35267d96

SHA512
89b014df03a157b565009e96ec9a4520fc12412404ed5420b5a540bb5aca6a60352996c91e5b81c235f93dd1a5412fb79a84b30038913f103a78249384e8f648

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\k7oxf4QMNMq.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\k7oxf4QMNMq.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1192-145-0x0000000000000000-mapping.dmp

Download
memory/1524-157-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1524-152-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1524-132-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1524-134-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/2348-135-0x0000000000000000-mapping.dmp

Download
memory/2388-143-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/2388-144-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/2388-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/2388-142-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/2388-153-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/2388-156-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/2388-139-0x0000000000000000-mapping.dmp

Download
memory/2784-155-0x0000000000000000-mapping.dmp

Download
memory/3644-154-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing