nymaim | 6b49f26f1ff9f1d8fa5fee38da85c6c9e159b37bacd14135fd6f7fc833c87308

General

Target

file.exe
Size

2.0MB
MD5

2352cef6d62deaa549cebb00bdbfe72d
SHA1

dcc8887f68acb825650f5dc33bb5118785f0675b
SHA256

6b49f26f1ff9f1d8fa5fee38da85c6c9e159b37bacd14135fd6f7fc833c87308
SHA512

008f15cc1d58eab0e49fa1e6ef378d6dc563bb57127fcb99465a0fc2ac789dd79448d8a813ea362122ab9f869beb6cbce16084dbbd082cb878fc9990bf547e5f
SSDEEP

49152:y2+TuWiGuM3/oH9OEoO2yzgBIo1PXEN0ZiyLxAII/m/WahOVLH:j+xiGuUgHkEoZ6gBV9X9h/JhOVLH

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
3468	file.tmp
3452	HitFiles134.exe
4924	YjPnKBiEx8X.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	HitFiles134.exe

Loads dropped DLL 1 IoCs

pid	Process
3468	file.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 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-8U1EE.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-AD0O8.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-J99IO.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-7P3LG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-K2HAG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KQKF5.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\HitFiles134.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\is-ISUTV.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-4QS0B.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CJ6UB.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-L4LNO.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-RDAU5.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-DCDCV.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-9L5FM.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1BDEL.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.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
2816	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3452	HitFiles134.exe
3452	HitFiles134.exe
3452	HitFiles134.exe
3452	HitFiles134.exe
3452	HitFiles134.exe
3452	HitFiles134.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2816	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3812 wrote to memory of 3468	3812	file.exe	82
PID 3812 wrote to memory of 3468	3812	file.exe	82
PID 3812 wrote to memory of 3468	3812	file.exe	82
PID 3468 wrote to memory of 3452	3468	file.tmp	83
PID 3468 wrote to memory of 3452	3468	file.tmp	83
PID 3468 wrote to memory of 3452	3468	file.tmp	83
PID 3452 wrote to memory of 4924	3452	HitFiles134.exe	84
PID 3452 wrote to memory of 4924	3452	HitFiles134.exe	84
PID 3452 wrote to memory of 4924	3452	HitFiles134.exe	84
PID 3452 wrote to memory of 4804	3452	HitFiles134.exe	92
PID 3452 wrote to memory of 4804	3452	HitFiles134.exe	92
PID 3452 wrote to memory of 4804	3452	HitFiles134.exe	92
PID 4804 wrote to memory of 2816	4804	cmd.exe	94
PID 4804 wrote to memory of 2816	4804	cmd.exe	94
PID 4804 wrote to memory of 2816	4804	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3812
- C:\Users\Admin\AppData\Local\Temp\is-V3MVB.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-V3MVB.tmp\file.tmp" /SL5="$601F0,1812811,162304,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:3468
- - C:\Program Files (x86)\Split Files\HitFiles134.exe
    "C:\Program Files (x86)\Split Files\HitFiles134.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3452
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\YjPnKBiEx8X.exe
      4⤵
      Executes dropped EXE
      PID:4924
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "HitFiles134.exe" /f & erase "C:\Program Files (x86)\Split Files\HitFiles134.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4804
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "HitFiles134.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2816

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)\Split Files\HitFiles134.exe

Filesize
3.4MB

MD5
60f4ba31fb384e8ebce41c7a4be5ecec

SHA1
8e20cc707054752e71e93df35feb5651492a9218

SHA256
73a963a4f031fa7a0bb9ce6629ea8bac0a6ab08b403303e29b430b8f7d5655bc

SHA512
3015c3d8688a7ae656e517a47ad36ae6e4d576603e2d1da8c5d7fb64de14567232ccc4690d9e1b589103d86237a20f3f65fcbd7a2c16b5113bb05bb71c2b1703

Download Submit
C:\Program Files (x86)\Split Files\HitFiles134.exe

Filesize
3.4MB

MD5
60f4ba31fb384e8ebce41c7a4be5ecec

SHA1
8e20cc707054752e71e93df35feb5651492a9218

SHA256
73a963a4f031fa7a0bb9ce6629ea8bac0a6ab08b403303e29b430b8f7d5655bc

SHA512
3015c3d8688a7ae656e517a47ad36ae6e4d576603e2d1da8c5d7fb64de14567232ccc4690d9e1b589103d86237a20f3f65fcbd7a2c16b5113bb05bb71c2b1703

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-L67SV.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-V3MVB.tmp\file.tmp

Filesize
800KB

MD5
7013a53c5472267941844ed17de4de3c

SHA1
dda886aa81995da2abb763969bba86e82988db1a

SHA256
9897aed9da44b8a3c7d7cdeac2fdf2281bcd024846c77d45bc84b973abddc81e

SHA512
6b1e8845ffeda2a775370a89aaf7e7477cd6264df15da3cc7e412c282e0ccfb3719d6b08fc65190e61ec9674f5f527d939d9cd50ff9f29af37a049d04596060d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-V3MVB.tmp\file.tmp

Filesize
800KB

MD5
7013a53c5472267941844ed17de4de3c

SHA1
dda886aa81995da2abb763969bba86e82988db1a

SHA256
9897aed9da44b8a3c7d7cdeac2fdf2281bcd024846c77d45bc84b973abddc81e

SHA512
6b1e8845ffeda2a775370a89aaf7e7477cd6264df15da3cc7e412c282e0ccfb3719d6b08fc65190e61ec9674f5f527d939d9cd50ff9f29af37a049d04596060d

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\YjPnKBiEx8X.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\YjPnKBiEx8X.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/3452-142-0x0000000000400000-0x000000000155F000-memory.dmp

Filesize
17.4MB

Download
memory/3452-156-0x0000000000400000-0x000000000155F000-memory.dmp

Filesize
17.4MB

Download
memory/3452-144-0x0000000000400000-0x000000000155F000-memory.dmp

Filesize
17.4MB

Download
memory/3452-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/3452-153-0x0000000000400000-0x000000000155F000-memory.dmp

Filesize
17.4MB

Download
memory/3452-143-0x0000000000400000-0x000000000155F000-memory.dmp

Filesize
17.4MB

Download
memory/3812-132-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3812-157-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3812-137-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/3812-152-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download

Analysis

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