nymaim | 9886f6116ff8765adbf616d8d9d4b5d14f53b4723db0c8e445ab2569342bfb52

General

Target

file.exe
Size

2.5MB
MD5

facb1bcef7e7ee828ec44d48ccf9ef7f
SHA1

f3ebc225f8b6ac4055a4516b1276d24a5b38e588
SHA256

9886f6116ff8765adbf616d8d9d4b5d14f53b4723db0c8e445ab2569342bfb52
SHA512

094c79a1fa0a5f126221c4f88244ec9c96570dee13aa4b636433e72fbeabd7381919f9ed11d0a9df36c099a2357373b6fa2a75c15370644823944e5ac56f6eb9
SSDEEP

49152:Z21kaoMRd1SLgOeWBy25wjnlOfqBY3S4r/p//9NK3cixaZcd0FbSj3PZCA1A5hq:MPdMuWHonlXqi4F23Hxa+2Fej/ZCvDq

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
4116	is-E47UG.tmp
4280	flsearcher67.exe
2620	AwH0f2T.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	flsearcher67.exe

Loads dropped DLL 1 IoCs

pid	Process
4116	is-E47UG.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\unins000.dat	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-HV803.tmp	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-93BPS.tmp	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-7OBS8.tmp	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-8ONAG.tmp	is-E47UG.tmp
File opened for modification	C:\Program Files (x86)\flSearcher\flsearcher67.exe	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-FU292.tmp	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-VJ20D.tmp	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-0JB78.tmp	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-125A4.tmp	is-E47UG.tmp
File created	C:\Program Files (x86)\flSearcher\is-FO0OS.tmp	is-E47UG.tmp
File opened for modification	C:\Program Files (x86)\flSearcher\unins000.dat	is-E47UG.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
3048	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4280	flsearcher67.exe
4280	flsearcher67.exe
4280	flsearcher67.exe
4280	flsearcher67.exe
4280	flsearcher67.exe
4280	flsearcher67.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3048	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4628 wrote to memory of 4116	4628	file.exe	81
PID 4628 wrote to memory of 4116	4628	file.exe	81
PID 4628 wrote to memory of 4116	4628	file.exe	81
PID 4116 wrote to memory of 4280	4116	is-E47UG.tmp	82
PID 4116 wrote to memory of 4280	4116	is-E47UG.tmp	82
PID 4116 wrote to memory of 4280	4116	is-E47UG.tmp	82
PID 4280 wrote to memory of 2620	4280	flsearcher67.exe	86
PID 4280 wrote to memory of 2620	4280	flsearcher67.exe	86
PID 4280 wrote to memory of 2620	4280	flsearcher67.exe	86
PID 4280 wrote to memory of 3296	4280	flsearcher67.exe	91
PID 4280 wrote to memory of 3296	4280	flsearcher67.exe	91
PID 4280 wrote to memory of 3296	4280	flsearcher67.exe	91
PID 3296 wrote to memory of 3048	3296	cmd.exe	93
PID 3296 wrote to memory of 3048	3296	cmd.exe	93
PID 3296 wrote to memory of 3048	3296	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:4628
- C:\Users\Admin\AppData\Local\Temp\is-4EP95.tmp\is-E47UG.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-4EP95.tmp\is-E47UG.tmp" /SL4 $D0046 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2411152 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4116
- - 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:4280
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\AwH0f2T.exe
      4⤵
      Executes dropped EXE
      PID:2620
  - - 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:3296
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "flsearcher67.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3048

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
9e1635a1fa860322471858887191fbfc

SHA1
e0bb90e39796c249f9dbc3472dbe168545357bc7

SHA256
4b8721a540111c42a60c9ff1224d7028e716f9518fb9b9a2ca58c2c4f0263f4c

SHA512
118a82ffdf465696a157b729e8fad706a4b3542b904404389d03e6f077cd69176739e4c11e026ca278cc88c3c27d436434a149fe99cce29a0bd9e45d37007a42

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

Filesize
3.6MB

MD5
9e1635a1fa860322471858887191fbfc

SHA1
e0bb90e39796c249f9dbc3472dbe168545357bc7

SHA256
4b8721a540111c42a60c9ff1224d7028e716f9518fb9b9a2ca58c2c4f0263f4c

SHA512
118a82ffdf465696a157b729e8fad706a4b3542b904404389d03e6f077cd69176739e4c11e026ca278cc88c3c27d436434a149fe99cce29a0bd9e45d37007a42

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-4EP95.tmp\is-E47UG.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-4EP95.tmp\is-E47UG.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-C6U36.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\AwH0f2T.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\AwH0f2T.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4280-143-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4280-144-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4280-142-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4280-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4280-153-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4280-156-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/4628-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4628-152-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4628-134-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4628-157-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing