nymaim | 4440750f1c62039c30a02a77ab88df8267585bd8541cf35a3d83a7efef3cf563

General

Target

file.exe
Size

2.3MB
MD5

2475b6b06bc23949d6cb6e37c85855ae
SHA1

493a0fd8c72ba3f1f11fdf64d8a8f7b718ffbf89
SHA256

4440750f1c62039c30a02a77ab88df8267585bd8541cf35a3d83a7efef3cf563
SHA512

7234908a3cd4a7adbb4855458f148f0b2ce58b03fadb74b16f0801864b175d5b8a6dec388e71bb98e69b3d5baff34f2a27c14aca45656420f07782cf4414eec4
SSDEEP

49152:Z2W+TGPh4xWMDK9DNdW4E1UDvlHLh6IkFVJsqjTVA5hq:MDTGPmxWMD8Wp1UVLQIkLjyDq

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.15.156.54

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
4928	is-LBE64.tmp
4788	ehsearcher52.exe
1392	CgSzbx.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	ehsearcher52.exe

Loads dropped DLL 1 IoCs

pid	Process
4928	is-LBE64.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)\ehSearcher\is-SF9E2.tmp	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\is-RTNS8.tmp	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\is-MN820.tmp	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\is-QK8PS.tmp	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\is-BJH2Q.tmp	is-LBE64.tmp
File opened for modification	C:\Program Files (x86)\ehSearcher\ehsearcher52.exe	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\unins000.dat	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\is-RR2BI.tmp	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\is-RDNPU.tmp	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\is-PQ2TP.tmp	is-LBE64.tmp
File opened for modification	C:\Program Files (x86)\ehSearcher\unins000.dat	is-LBE64.tmp
File created	C:\Program Files (x86)\ehSearcher\is-2B547.tmp	is-LBE64.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
916	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4788	ehsearcher52.exe
4788	ehsearcher52.exe
4788	ehsearcher52.exe
4788	ehsearcher52.exe
4788	ehsearcher52.exe
4788	ehsearcher52.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	916	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 1680 wrote to memory of 4928	1680	file.exe	83
PID 1680 wrote to memory of 4928	1680	file.exe	83
PID 1680 wrote to memory of 4928	1680	file.exe	83
PID 4928 wrote to memory of 4788	4928	is-LBE64.tmp	84
PID 4928 wrote to memory of 4788	4928	is-LBE64.tmp	84
PID 4928 wrote to memory of 4788	4928	is-LBE64.tmp	84
PID 4788 wrote to memory of 1392	4788	ehsearcher52.exe	89
PID 4788 wrote to memory of 1392	4788	ehsearcher52.exe	89
PID 4788 wrote to memory of 1392	4788	ehsearcher52.exe	89
PID 4788 wrote to memory of 1884	4788	ehsearcher52.exe	96
PID 4788 wrote to memory of 1884	4788	ehsearcher52.exe	96
PID 4788 wrote to memory of 1884	4788	ehsearcher52.exe	96
PID 1884 wrote to memory of 916	1884	cmd.exe	98
PID 1884 wrote to memory of 916	1884	cmd.exe	98
PID 1884 wrote to memory of 916	1884	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1680
- C:\Users\Admin\AppData\Local\Temp\is-MD68G.tmp\is-LBE64.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-MD68G.tmp\is-LBE64.tmp" /SL4 $40184 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2150020 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4928
- - C:\Program Files (x86)\ehSearcher\ehsearcher52.exe
    "C:\Program Files (x86)\ehSearcher\ehsearcher52.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4788
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\CgSzbx.exe
      4⤵
      Executes dropped EXE
      PID:1392
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "ehsearcher52.exe" /f & erase "C:\Program Files (x86)\ehSearcher\ehsearcher52.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1884
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "ehsearcher52.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:916

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

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Downloads

C:\Program Files (x86)\ehSearcher\ehsearcher52.exe

Filesize
3.8MB

MD5
76ce3f8f2f53df7cf2922bf934f826d8

SHA1
35306f43fa24fd50eeb97d01eb0445e18fe8d482

SHA256
a4aca90ad72caebe463ea4a10fbd696bd0d5465ddfbdb6f34a539cfa0ff575ec

SHA512
37fef0ac72633db75c4dcf4e5d07ebf67d2baad0f37006b81119d81d3d3a66c3f8db7751dcf67a16896cc3b99c1a5bd0aead352c68be6e605cfd558fde5ab612

Download Submit
C:\Program Files (x86)\ehSearcher\ehsearcher52.exe

Filesize
3.8MB

MD5
76ce3f8f2f53df7cf2922bf934f826d8

SHA1
35306f43fa24fd50eeb97d01eb0445e18fe8d482

SHA256
a4aca90ad72caebe463ea4a10fbd696bd0d5465ddfbdb6f34a539cfa0ff575ec

SHA512
37fef0ac72633db75c4dcf4e5d07ebf67d2baad0f37006b81119d81d3d3a66c3f8db7751dcf67a16896cc3b99c1a5bd0aead352c68be6e605cfd558fde5ab612

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

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-MD68G.tmp\is-LBE64.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-MD68G.tmp\is-LBE64.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1680-138-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1680-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/1680-155-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4788-143-0x0000000000400000-0x00000000015C6000-memory.dmp

Filesize
17.8MB

Download
memory/4788-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4788-151-0x0000000000400000-0x00000000015C6000-memory.dmp

Filesize
17.8MB

Download
memory/4788-142-0x0000000000400000-0x00000000015C6000-memory.dmp

Filesize
17.8MB

Download
memory/4788-154-0x0000000000400000-0x00000000015C6000-memory.dmp

Filesize
17.8MB

Download

Analysis

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