nymaim | 7d008cbda12edacc369deceddd16866f7ee8e71252c79e1867132f46d5774222

General

Target

file.exe
Size

2.3MB
MD5

992d25b9275607f2fed14523fa2ad06f
SHA1

d7b2cba974a1d870bcbdf598b78cc2d4a2023026
SHA256

7d008cbda12edacc369deceddd16866f7ee8e71252c79e1867132f46d5774222
SHA512

117527d7b4eefbc97aa7a5393dcbf10957d1b1905b5e4209c7735897f4b8fb7d60979f0792b141b0568e136beee42496a7282d603ecfba7cc8308e945ba00bbb
SSDEEP

49152:Z2Yda0DC8pPVkPQzfQMjYrmHMJIcw59FEK2bqa4A5hq:MG28psQzfQMjYy9cg9FEZbXDq

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
3348	is-CG5AJ.tmp
4360	exsearcher60.exe
3688	gpnJmgvQ7uJ730.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	exsearcher60.exe

Loads dropped DLL 1 IoCs

pid	Process
3348	is-CG5AJ.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)\exSearcher\is-N5QKU.tmp	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\is-7EKDU.tmp	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\is-DG3TC.tmp	is-CG5AJ.tmp
File opened for modification	C:\Program Files (x86)\exSearcher\exsearcher60.exe	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\unins000.dat	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\is-IKCOP.tmp	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\is-M065J.tmp	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\is-4BP68.tmp	is-CG5AJ.tmp
File opened for modification	C:\Program Files (x86)\exSearcher\unins000.dat	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\is-P4EK9.tmp	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\is-GDU84.tmp	is-CG5AJ.tmp
File created	C:\Program Files (x86)\exSearcher\is-QHF2Q.tmp	is-CG5AJ.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
3208	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4360	exsearcher60.exe
4360	exsearcher60.exe
4360	exsearcher60.exe
4360	exsearcher60.exe
4360	exsearcher60.exe
4360	exsearcher60.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3208	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2128 wrote to memory of 3348	2128	file.exe	83
PID 2128 wrote to memory of 3348	2128	file.exe	83
PID 2128 wrote to memory of 3348	2128	file.exe	83
PID 3348 wrote to memory of 4360	3348	is-CG5AJ.tmp	85
PID 3348 wrote to memory of 4360	3348	is-CG5AJ.tmp	85
PID 3348 wrote to memory of 4360	3348	is-CG5AJ.tmp	85
PID 4360 wrote to memory of 3688	4360	exsearcher60.exe	89
PID 4360 wrote to memory of 3688	4360	exsearcher60.exe	89
PID 4360 wrote to memory of 3688	4360	exsearcher60.exe	89
PID 4360 wrote to memory of 3620	4360	exsearcher60.exe	94
PID 4360 wrote to memory of 3620	4360	exsearcher60.exe	94
PID 4360 wrote to memory of 3620	4360	exsearcher60.exe	94
PID 3620 wrote to memory of 3208	3620	cmd.exe	96
PID 3620 wrote to memory of 3208	3620	cmd.exe	96
PID 3620 wrote to memory of 3208	3620	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:2128
- C:\Users\Admin\AppData\Local\Temp\is-GU4IC.tmp\is-CG5AJ.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-GU4IC.tmp\is-CG5AJ.tmp" /SL4 $C003A "C:\Users\Admin\AppData\Local\Temp\file.exe" 2151709 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3348
- - C:\Program Files (x86)\exSearcher\exsearcher60.exe
    "C:\Program Files (x86)\exSearcher\exsearcher60.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4360
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\gpnJmgvQ7uJ730.exe
      4⤵
      Executes dropped EXE
      PID:3688
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "exsearcher60.exe" /f & erase "C:\Program Files (x86)\exSearcher\exsearcher60.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3620
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "exsearcher60.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3208

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)\exSearcher\exsearcher60.exe

Filesize
3.3MB

MD5
9ba676e851c18a2e2499ea523b8fc63b

SHA1
388b2c1e20a701f882d11a80cea7c1c9b6b5fbbb

SHA256
dc8c63e2053d28a8cc8a904a5557b857113d0c1de241353bacc408047f371df2

SHA512
6c832dfd3c8697071a0e259ba61101b4c678f031b85baa58a14ce3ebda693d73fed6d0d17acf9a1a2f6f6169e1dbbd413b35cdb954fb3d85b56745f1b578651c

Download Submit
C:\Program Files (x86)\exSearcher\exsearcher60.exe

Filesize
3.3MB

MD5
9ba676e851c18a2e2499ea523b8fc63b

SHA1
388b2c1e20a701f882d11a80cea7c1c9b6b5fbbb

SHA256
dc8c63e2053d28a8cc8a904a5557b857113d0c1de241353bacc408047f371df2

SHA512
6c832dfd3c8697071a0e259ba61101b4c678f031b85baa58a14ce3ebda693d73fed6d0d17acf9a1a2f6f6169e1dbbd413b35cdb954fb3d85b56745f1b578651c

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-8ODGD.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GU4IC.tmp\is-CG5AJ.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-GU4IC.tmp\is-CG5AJ.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\gpnJmgvQ7uJ730.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\gpnJmgvQ7uJ730.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2128-141-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2128-158-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2128-135-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3208-156-0x0000000000000000-mapping.dmp

Download
memory/3348-137-0x0000000000000000-mapping.dmp

Download
memory/3620-155-0x0000000000000000-mapping.dmp

Download
memory/3688-147-0x0000000000000000-mapping.dmp

Download
memory/4360-146-0x0000000000400000-0x000000000154C000-memory.dmp

Filesize
17.3MB

Download
memory/4360-154-0x0000000000400000-0x000000000154C000-memory.dmp

Filesize
17.3MB

Download
memory/4360-150-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4360-145-0x0000000000400000-0x000000000154C000-memory.dmp

Filesize
17.3MB

Download
memory/4360-157-0x0000000000400000-0x000000000154C000-memory.dmp

Filesize
17.3MB

Download
memory/4360-142-0x0000000000000000-mapping.dmp

Download

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