nymaim | 8630082c70d58cc65df76196386ba052ef69e0b6088e146ffdfa7d3e96db69d4

General

Target

file.exe
Size

1.9MB
MD5

397a6922492b6e5a87b23a680e2354b3
SHA1

d01e7dafacc52ec63514d1785621c39a24b2e6b9
SHA256

8630082c70d58cc65df76196386ba052ef69e0b6088e146ffdfa7d3e96db69d4
SHA512

d1389799c35aec0a9e99f823ebb03c0dbd68c40a719ad03d1bbc2c9a3050e5c24137c586ec6ec7618edfc8217934fbfa8cece64f42c238388ef4e4e6b3a3f741
SSDEEP

49152:y2+pBHTma7oWoh287AuaQGyw3A6a2B5Ro2QnL5SvXpI/m/WahOVLH:jSma83h2wAmGygrtgLK/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
2680	file.tmp
4372	HitFiles134.exe
2396	HA7hNYjT5GC.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	HitFiles134.exe

Loads dropped DLL 1 IoCs

pid	Process
2680	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-JUMPO.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-Q848U.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-C09NQ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-SB2NG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-N67OT.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-NVJKS.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-40HLO.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-ANS06.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-2CNVU.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-EUD0D.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CSFUU.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-0SARV.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-1EUHH.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-LJE4C.tmp	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
3720	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4372	HitFiles134.exe
4372	HitFiles134.exe
4372	HitFiles134.exe
4372	HitFiles134.exe
4372	HitFiles134.exe
4372	HitFiles134.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3720	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2680	2136	file.exe	77
PID 2136 wrote to memory of 2680	2136	file.exe	77
PID 2136 wrote to memory of 2680	2136	file.exe	77
PID 2680 wrote to memory of 4372	2680	file.tmp	78
PID 2680 wrote to memory of 4372	2680	file.tmp	78
PID 2680 wrote to memory of 4372	2680	file.tmp	78
PID 4372 wrote to memory of 2396	4372	HitFiles134.exe	79
PID 4372 wrote to memory of 2396	4372	HitFiles134.exe	79
PID 4372 wrote to memory of 2396	4372	HitFiles134.exe	79
PID 4372 wrote to memory of 540	4372	HitFiles134.exe	89
PID 4372 wrote to memory of 540	4372	HitFiles134.exe	89
PID 4372 wrote to memory of 540	4372	HitFiles134.exe	89
PID 540 wrote to memory of 3720	540	cmd.exe	91
PID 540 wrote to memory of 3720	540	cmd.exe	91
PID 540 wrote to memory of 3720	540	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Users\Admin\AppData\Local\Temp\is-1E41S.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-1E41S.tmp\file.tmp" /SL5="$601D4,1687659,162304,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:2680
- - 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:4372
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\HA7hNYjT5GC.exe
      4⤵
      Executes dropped EXE
      PID:2396
  - - 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:540
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "HitFiles134.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3720

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
3.2MB

MD5
4abc99d015b5b97550b2a41dbde3983b

SHA1
326aacf9ba1cea9638779c78b643c65681bc684d

SHA256
03306860008b62c7be4eabde37f14b5fff7ef5da796d88d3e08123a3d8e8f2f6

SHA512
0249ca079ee1636541db8ddaa82217c73393aad31edc4350a6ed8b9a3ca736a8ddcebe964c4995e0e10521358fc2e67afc855967f8b4f8eecb1f947d030e1a41

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

Filesize
3.2MB

MD5
4abc99d015b5b97550b2a41dbde3983b

SHA1
326aacf9ba1cea9638779c78b643c65681bc684d

SHA256
03306860008b62c7be4eabde37f14b5fff7ef5da796d88d3e08123a3d8e8f2f6

SHA512
0249ca079ee1636541db8ddaa82217c73393aad31edc4350a6ed8b9a3ca736a8ddcebe964c4995e0e10521358fc2e67afc855967f8b4f8eecb1f947d030e1a41

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-1E41S.tmp\file.tmp

Filesize
800KB

MD5
7013a53c5472267941844ed17de4de3c

SHA1
dda886aa81995da2abb763969bba86e82988db1a

SHA256
9897aed9da44b8a3c7d7cdeac2fdf2281bcd024846c77d45bc84b973abddc81e

SHA512
6b1e8845ffeda2a775370a89aaf7e7477cd6264df15da3cc7e412c282e0ccfb3719d6b08fc65190e61ec9674f5f527d939d9cd50ff9f29af37a049d04596060d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-1E41S.tmp\file.tmp

Filesize
800KB

MD5
7013a53c5472267941844ed17de4de3c

SHA1
dda886aa81995da2abb763969bba86e82988db1a

SHA256
9897aed9da44b8a3c7d7cdeac2fdf2281bcd024846c77d45bc84b973abddc81e

SHA512
6b1e8845ffeda2a775370a89aaf7e7477cd6264df15da3cc7e412c282e0ccfb3719d6b08fc65190e61ec9674f5f527d939d9cd50ff9f29af37a049d04596060d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-AU0SA.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\HA7hNYjT5GC.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\HA7hNYjT5GC.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2136-138-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2136-155-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/2136-132-0x0000000000400000-0x000000000042F000-memory.dmp

Filesize
188KB

Download
memory/4372-143-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download
memory/4372-151-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download
memory/4372-147-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4372-142-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download
memory/4372-154-0x0000000000400000-0x000000000152D000-memory.dmp

Filesize
17.2MB

Download

Analysis

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