nymaim | 828965d1eed6b6d44d92a4fb539fbd7c56b3e4d68a7ad135dc950c3fb0cfdf61

General

Target

file.exe
Size

2.5MB
MD5

bbc3d42d7bdaf101ec25b0ce111180e3
SHA1

ead1b4396c94752f41c12ff8568a95b9e4fadccc
SHA256

828965d1eed6b6d44d92a4fb539fbd7c56b3e4d68a7ad135dc950c3fb0cfdf61
SHA512

af5930186a2436490d74ebfcc1760eb8aabd24f95ba514b47cb65f5fc1346defa01d4acf8a28d1ebddb5d6a04adefe6b15d3b21ae3ff8c0bb34e9dd4a02a59ae
SSDEEP

49152:Z2xGW4DB73pL4qEYWVN1zVP10n1BXNMcP6mb/uqRARFSIERJYK8GA5hq:MxGW4XL4pzVbzVPuzC9mTWRFSIERODq

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
4076	is-LQN9S.tmp
5112	flsearcher67.exe
2188	615RAWO.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-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	flsearcher67.exe

Loads dropped DLL 1 IoCs

pid	Process
4076	is-LQN9S.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-32802.tmp	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\is-P960H.tmp	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\is-EC1KC.tmp	is-LQN9S.tmp
File opened for modification	C:\Program Files (x86)\flSearcher\flsearcher67.exe	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\unins000.dat	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\is-Q6RQ3.tmp	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\is-TUU3B.tmp	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\is-1APTR.tmp	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\is-5RUVN.tmp	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\is-A41R7.tmp	is-LQN9S.tmp
File created	C:\Program Files (x86)\flSearcher\is-JC0C4.tmp	is-LQN9S.tmp
File opened for modification	C:\Program Files (x86)\flSearcher\unins000.dat	is-LQN9S.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
1008	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5112	flsearcher67.exe
5112	flsearcher67.exe
5112	flsearcher67.exe
5112	flsearcher67.exe
5112	flsearcher67.exe
5112	flsearcher67.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1008	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4728 wrote to memory of 4076	4728	file.exe	81
PID 4728 wrote to memory of 4076	4728	file.exe	81
PID 4728 wrote to memory of 4076	4728	file.exe	81
PID 4076 wrote to memory of 5112	4076	is-LQN9S.tmp	82
PID 4076 wrote to memory of 5112	4076	is-LQN9S.tmp	82
PID 4076 wrote to memory of 5112	4076	is-LQN9S.tmp	82
PID 5112 wrote to memory of 2188	5112	flsearcher67.exe	83
PID 5112 wrote to memory of 2188	5112	flsearcher67.exe	83
PID 5112 wrote to memory of 2188	5112	flsearcher67.exe	83
PID 5112 wrote to memory of 2824	5112	flsearcher67.exe	91
PID 5112 wrote to memory of 2824	5112	flsearcher67.exe	91
PID 5112 wrote to memory of 2824	5112	flsearcher67.exe	91
PID 2824 wrote to memory of 1008	2824	cmd.exe	93
PID 2824 wrote to memory of 1008	2824	cmd.exe	93
PID 2824 wrote to memory of 1008	2824	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:4728
- C:\Users\Admin\AppData\Local\Temp\is-RD4VS.tmp\is-LQN9S.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-RD4VS.tmp\is-LQN9S.tmp" /SL4 $901C8 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2389946 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4076
- - 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:5112
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\615RAWO.exe
      4⤵
      Executes dropped EXE
      PID:2188
  - - 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:2824
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "flsearcher67.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1008

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)\flSearcher\flsearcher67.exe

Filesize
3.6MB

MD5
573fe42593e4df362001a1685999d9bc

SHA1
abc33b70ec1fa8e43e3ff3f8c683eee096477fd3

SHA256
5b602d43277217be11835d2e08e44c33b8dc59dbe0d07e5ad4210fc7575f6392

SHA512
8395b69c65ad389ff21271b4549ac3a5591c76d3c88ef9f36d83590d1eb99657376a2cc1b203c2af623126bb6fa865f392a73f8caf66fded76224ffc5ac3d982

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

Filesize
3.6MB

MD5
573fe42593e4df362001a1685999d9bc

SHA1
abc33b70ec1fa8e43e3ff3f8c683eee096477fd3

SHA256
5b602d43277217be11835d2e08e44c33b8dc59dbe0d07e5ad4210fc7575f6392

SHA512
8395b69c65ad389ff21271b4549ac3a5591c76d3c88ef9f36d83590d1eb99657376a2cc1b203c2af623126bb6fa865f392a73f8caf66fded76224ffc5ac3d982

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

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-RD4VS.tmp\is-LQN9S.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-RD4VS.tmp\is-LQN9S.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\615RAWO.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\615RAWO.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4728-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4728-138-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4728-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/5112-143-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/5112-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/5112-152-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/5112-144-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/5112-142-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download
memory/5112-155-0x0000000000400000-0x00000000015A2000-memory.dmp

Filesize
17.6MB

Download

Analysis

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