nymaim | 059a54ae8e5768e68c247e181d4df25326cfd71e2bd7c7495728f37df6ca779f

General

Target

file.exe
Size

2.5MB
MD5

456b2407864251c44fde5fe9c5ec5089
SHA1

57d9f7e17ddfd36a69895f417d207eb96984a571
SHA256

059a54ae8e5768e68c247e181d4df25326cfd71e2bd7c7495728f37df6ca779f
SHA512

c597b2d6c9563109b20268ac3a95d5182396548004b9af42af09cc5658afce4b8479746d38786fc0bcb1a980966f647efa0c037a217d17c4c961b9d93a2ee4f7
SSDEEP

49152:Z2/B/OrHhyKfPk1LLXwLwBbJJfjaoXWE2YuvR0HWFb23fef3OWA5hq:M/coKfPkJBb/flXWHJcY23kQDq

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
1808	is-2HN3R.tmp
4640	flsearcher67.exe
3344	izpXBZQE0CiaH.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	flsearcher67.exe

Loads dropped DLL 1 IoCs

pid	Process
1808	is-2HN3R.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 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\flSearcher\is-HIG4K.tmp	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\is-HG75R.tmp	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\is-C5LE1.tmp	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\is-8GL7M.tmp	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\unins000.dat	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\is-C4C38.tmp	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\is-9QGF5.tmp	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\is-EC6PH.tmp	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\is-7G09B.tmp	is-2HN3R.tmp
File opened for modification	C:\Program Files (x86)\flSearcher\unins000.dat	is-2HN3R.tmp
File opened for modification	C:\Program Files (x86)\flSearcher\flsearcher67.exe	is-2HN3R.tmp
File created	C:\Program Files (x86)\flSearcher\is-EJRN7.tmp	is-2HN3R.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
992	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4640	flsearcher67.exe
4640	flsearcher67.exe
4640	flsearcher67.exe
4640	flsearcher67.exe
4640	flsearcher67.exe
4640	flsearcher67.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	992	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1064 wrote to memory of 1808	1064	file.exe	79
PID 1064 wrote to memory of 1808	1064	file.exe	79
PID 1064 wrote to memory of 1808	1064	file.exe	79
PID 1808 wrote to memory of 4640	1808	is-2HN3R.tmp	80
PID 1808 wrote to memory of 4640	1808	is-2HN3R.tmp	80
PID 1808 wrote to memory of 4640	1808	is-2HN3R.tmp	80
PID 4640 wrote to memory of 3344	4640	flsearcher67.exe	85
PID 4640 wrote to memory of 3344	4640	flsearcher67.exe	85
PID 4640 wrote to memory of 3344	4640	flsearcher67.exe	85
PID 4640 wrote to memory of 4264	4640	flsearcher67.exe	90
PID 4640 wrote to memory of 4264	4640	flsearcher67.exe	90
PID 4640 wrote to memory of 4264	4640	flsearcher67.exe	90
PID 4264 wrote to memory of 992	4264	cmd.exe	92
PID 4264 wrote to memory of 992	4264	cmd.exe	92
PID 4264 wrote to memory of 992	4264	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1064
- C:\Users\Admin\AppData\Local\Temp\is-07KM7.tmp\is-2HN3R.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-07KM7.tmp\is-2HN3R.tmp" /SL4 $D0064 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2342445 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1808
- - C:\Program Files (x86)\flSearcher\flsearcher67.exe
    "C:\Program Files (x86)\flSearcher\flsearcher67.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4640
  - - C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\izpXBZQE0CiaH.exe
      4⤵
      Executes dropped EXE
      PID:3344
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "flsearcher67.exe" /f & erase "C:\Program Files (x86)\flSearcher\flsearcher67.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4264
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "flsearcher67.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:992

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)\flSearcher\flsearcher67.exe

Filesize
3.6MB

MD5
43c9b23466007f84a36039734f886e91

SHA1
541c01d760eb80ba942ecd91e89ad673c5d9b488

SHA256
38a5fc070e3c1dc5ecf2457dfb7699d410de56d206bf138c7d29b83b0a267a1f

SHA512
d1baecf882e172cd0df26cb760dfe3e51fce2df325e5ca85f4fcc7ff871d04d30afe43f204244b6ee850699232df6b85843bc4e3cf35a5b12c903ba62d5926bd

Download Submit
C:\Program Files (x86)\flSearcher\flsearcher67.exe

Filesize
3.6MB

MD5
43c9b23466007f84a36039734f886e91

SHA1
541c01d760eb80ba942ecd91e89ad673c5d9b488

SHA256
38a5fc070e3c1dc5ecf2457dfb7699d410de56d206bf138c7d29b83b0a267a1f

SHA512
d1baecf882e172cd0df26cb760dfe3e51fce2df325e5ca85f4fcc7ff871d04d30afe43f204244b6ee850699232df6b85843bc4e3cf35a5b12c903ba62d5926bd

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-07KM7.tmp\is-2HN3R.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-07KM7.tmp\is-2HN3R.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-9TAOR.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\izpXBZQE0CiaH.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{1ca2f389-1ab8-11ed-aebb-806e6f6e6963}\izpXBZQE0CiaH.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1064-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1064-137-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1064-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4640-143-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4640-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4640-152-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4640-144-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4640-142-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4640-155-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download

Analysis

Sharing