nymaim | 0153af8dcd29aa8d23280358833684fa6f8609820346580983091a0482917a25

General

Target

file.exe
Size

2.3MB
MD5

707b7e52249d5d69bcab9380e8864512
SHA1

ac9730e9fbf2d17d62138c8f1cc664e61c874245
SHA256

0153af8dcd29aa8d23280358833684fa6f8609820346580983091a0482917a25
SHA512

9d33cd155800365c581d54f6dd9199f9820d71c8508813e88f2b6415f082a216289565fdda7c4a8b4213e4553ced5c8d2a5d3973539051e1b8c1852e386dfe77
SSDEEP

49152:Z2F8CYH9I5uAGCA/6eD+3TrbJBkbkPtf/xJAbKm4L/Vhi2D+L5C8EOA5hq:MF15lGCbeWrbJBkbg/cmnTR8gVDq

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
4816	is-S551T.tmp
4792	evsearcher59.exe
2576	yve4iaLGn.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	evsearcher59.exe

Loads dropped DLL 1 IoCs

pid	Process
4816	is-S551T.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)\evSearcher\is-JETU7.tmp	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\is-3NOVP.tmp	is-S551T.tmp
File opened for modification	C:\Program Files (x86)\evSearcher\evsearcher59.exe	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\is-2NR4O.tmp	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\is-I3S2A.tmp	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\is-NP9IS.tmp	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\is-HUJAG.tmp	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\is-LDTPV.tmp	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\is-H3R5G.tmp	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\is-Q62MG.tmp	is-S551T.tmp
File opened for modification	C:\Program Files (x86)\evSearcher\unins000.dat	is-S551T.tmp
File created	C:\Program Files (x86)\evSearcher\unins000.dat	is-S551T.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
2284	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4792	evsearcher59.exe
4792	evsearcher59.exe
4792	evsearcher59.exe
4792	evsearcher59.exe
4792	evsearcher59.exe
4792	evsearcher59.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3836 wrote to memory of 4816	3836	file.exe	82
PID 3836 wrote to memory of 4816	3836	file.exe	82
PID 3836 wrote to memory of 4816	3836	file.exe	82
PID 4816 wrote to memory of 4792	4816	is-S551T.tmp	83
PID 4816 wrote to memory of 4792	4816	is-S551T.tmp	83
PID 4816 wrote to memory of 4792	4816	is-S551T.tmp	83
PID 4792 wrote to memory of 2576	4792	evsearcher59.exe	86
PID 4792 wrote to memory of 2576	4792	evsearcher59.exe	86
PID 4792 wrote to memory of 2576	4792	evsearcher59.exe	86
PID 4792 wrote to memory of 1388	4792	evsearcher59.exe	94
PID 4792 wrote to memory of 1388	4792	evsearcher59.exe	94
PID 4792 wrote to memory of 1388	4792	evsearcher59.exe	94
PID 1388 wrote to memory of 2284	1388	cmd.exe	96
PID 1388 wrote to memory of 2284	1388	cmd.exe	96
PID 1388 wrote to memory of 2284	1388	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3836
- C:\Users\Admin\AppData\Local\Temp\is-J3KAE.tmp\is-S551T.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-J3KAE.tmp\is-S551T.tmp" /SL4 $40184 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2191793 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4816
- - C:\Program Files (x86)\evSearcher\evsearcher59.exe
    "C:\Program Files (x86)\evSearcher\evsearcher59.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4792
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\yve4iaLGn.exe
      4⤵
      Executes dropped EXE
      PID:2576
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "evsearcher59.exe" /f & erase "C:\Program Files (x86)\evSearcher\evsearcher59.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1388
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "evsearcher59.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2284

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)\evSearcher\evsearcher59.exe

Filesize
3.3MB

MD5
5d9e7bab9f9d6914e16b89bc018e14ba

SHA1
e1520805a7577d63c933b47b7c1ed5e78ac16aa5

SHA256
6ae782f065995e88fee63fc85e4c36630b462829f42f8d946475e9d95f08fd6e

SHA512
b9b98f02b61fc015b04b9a3746a285e90cebd31373157ddc38a29d7f956c3c47945a09279055887c93429a57d9f24fa4b029f92e84764d8d0bed86287d51abb1

Download Submit
C:\Program Files (x86)\evSearcher\evsearcher59.exe

Filesize
3.3MB

MD5
5d9e7bab9f9d6914e16b89bc018e14ba

SHA1
e1520805a7577d63c933b47b7c1ed5e78ac16aa5

SHA256
6ae782f065995e88fee63fc85e4c36630b462829f42f8d946475e9d95f08fd6e

SHA512
b9b98f02b61fc015b04b9a3746a285e90cebd31373157ddc38a29d7f956c3c47945a09279055887c93429a57d9f24fa4b029f92e84764d8d0bed86287d51abb1

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-DD912.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-J3KAE.tmp\is-S551T.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-J3KAE.tmp\is-S551T.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\yve4iaLGn.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\yve4iaLGn.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1388-153-0x0000000000000000-mapping.dmp

Download
memory/2284-154-0x0000000000000000-mapping.dmp

Download
memory/2576-144-0x0000000000000000-mapping.dmp

Download
memory/3836-151-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3836-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3836-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4792-143-0x0000000000400000-0x000000000154B000-memory.dmp

Filesize
17.3MB

Download
memory/4792-142-0x0000000000400000-0x000000000154B000-memory.dmp

Filesize
17.3MB

Download
memory/4792-141-0x0000000000400000-0x000000000154B000-memory.dmp

Filesize
17.3MB

Download
memory/4792-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4792-152-0x0000000000400000-0x000000000154B000-memory.dmp

Filesize
17.3MB

Download
memory/4792-138-0x0000000000000000-mapping.dmp

Download
memory/4792-155-0x0000000000400000-0x000000000154B000-memory.dmp

Filesize
17.3MB

Download
memory/4816-134-0x0000000000000000-mapping.dmp

Download

Analysis

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