nymaim | 7336b53981ab25391f7a354a18db1656c4a8725fb3378d8bcf4fdb061c3f0c47

General

Target

file.exe
Size

2.4MB
MD5

55d5224b50464f01196d2b2bbfcf9f35
SHA1

68dc8b9f48db5ad5981809cedb7176d8d0b65553
SHA256

7336b53981ab25391f7a354a18db1656c4a8725fb3378d8bcf4fdb061c3f0c47
SHA512

b86dab25a0db1e35877d264ff10fb6b0c1cc45f22dbf4ec6b931c951493d127014f9c4619f0c1a07f448356bf141982baaeeb24f908b45daa1e3036d2aabb092
SSDEEP

49152:Z2l5ppEihUOXdwFpUXH9f1C3/385fvSK+3LFWSV6+hoTzSeyWHLtEA5hq:Ml5ppEihU8EpU39f1c8O7FylTzRHLtrW

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
5016	is-4UB98.tmp
2428	fdsearcher63.exe
3408	iwdW4.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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	fdsearcher63.exe

Loads dropped DLL 1 IoCs

pid	Process
5016	is-4UB98.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 opened for modification	C:\Program Files (x86)\fdSearcher\fdsearcher63.exe	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\unins000.dat	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-OUVNQ.tmp	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-PO781.tmp	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-D2H7P.tmp	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-7N734.tmp	is-4UB98.tmp
File opened for modification	C:\Program Files (x86)\fdSearcher\unins000.dat	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-QHKL7.tmp	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-52L40.tmp	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-N0TT4.tmp	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-J1H0P.tmp	is-4UB98.tmp
File created	C:\Program Files (x86)\fdSearcher\is-OD450.tmp	is-4UB98.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
5032	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2428	fdsearcher63.exe
2428	fdsearcher63.exe
2428	fdsearcher63.exe
2428	fdsearcher63.exe
2428	fdsearcher63.exe
2428	fdsearcher63.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	5032	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3404 wrote to memory of 5016	3404	file.exe	84
PID 3404 wrote to memory of 5016	3404	file.exe	84
PID 3404 wrote to memory of 5016	3404	file.exe	84
PID 5016 wrote to memory of 2428	5016	is-4UB98.tmp	85
PID 5016 wrote to memory of 2428	5016	is-4UB98.tmp	85
PID 5016 wrote to memory of 2428	5016	is-4UB98.tmp	85
PID 2428 wrote to memory of 3408	2428	fdsearcher63.exe	86
PID 2428 wrote to memory of 3408	2428	fdsearcher63.exe	86
PID 2428 wrote to memory of 3408	2428	fdsearcher63.exe	86
PID 2428 wrote to memory of 4360	2428	fdsearcher63.exe	94
PID 2428 wrote to memory of 4360	2428	fdsearcher63.exe	94
PID 2428 wrote to memory of 4360	2428	fdsearcher63.exe	94
PID 4360 wrote to memory of 5032	4360	cmd.exe	96
PID 4360 wrote to memory of 5032	4360	cmd.exe	96
PID 4360 wrote to memory of 5032	4360	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:3404
- C:\Users\Admin\AppData\Local\Temp\is-1S44G.tmp\is-4UB98.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-1S44G.tmp\is-4UB98.tmp" /SL4 $1D01DC "C:\Users\Admin\AppData\Local\Temp\file.exe" 2303436 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:5016
- - C:\Program Files (x86)\fdSearcher\fdsearcher63.exe
    "C:\Program Files (x86)\fdSearcher\fdsearcher63.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2428
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iwdW4.exe
      4⤵
      Executes dropped EXE
      PID:3408
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "fdsearcher63.exe" /f & erase "C:\Program Files (x86)\fdSearcher\fdsearcher63.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4360
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "fdsearcher63.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:5032

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)\fdSearcher\fdsearcher63.exe

Filesize
3.8MB

MD5
72fb32aeda6d9cd55b3579f00c7ece8f

SHA1
5befb85c250e79a9d1b30173b5c8251d971f73c6

SHA256
4d58ecdfe1925acc7f234f0713c883cb8cc2efe2a69a7ebd709593ec759137c1

SHA512
604250774c6aa3589066bf6c44619ca7faf4c97ab326e0af46b79d5aea18b8fb798dd046481d2f99d2b3b1e86fe84fdd8e5448f7e75ea62f04a215d82dc086f9

Download Submit
C:\Program Files (x86)\fdSearcher\fdsearcher63.exe

Filesize
3.8MB

MD5
72fb32aeda6d9cd55b3579f00c7ece8f

SHA1
5befb85c250e79a9d1b30173b5c8251d971f73c6

SHA256
4d58ecdfe1925acc7f234f0713c883cb8cc2efe2a69a7ebd709593ec759137c1

SHA512
604250774c6aa3589066bf6c44619ca7faf4c97ab326e0af46b79d5aea18b8fb798dd046481d2f99d2b3b1e86fe84fdd8e5448f7e75ea62f04a215d82dc086f9

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-1S44G.tmp\is-4UB98.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-1S44G.tmp\is-4UB98.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-QI92O.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iwdW4.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iwdW4.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2428-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/2428-155-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2428-142-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2428-143-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2428-144-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/2428-152-0x0000000000400000-0x00000000015C9000-memory.dmp

Filesize
17.8MB

Download
memory/3404-138-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3404-156-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3404-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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