nymaim | 5f7ec38ef6addd60aa18ff3f860f60b77bc5328553fd33d914a3f0013b951f93

General

Target

file.exe
Size

1.1MB
MD5

6d8e419351b9a23c99978500f25284e6
SHA1

818b9ce4ec8768d8b65f046691e7f291a4ab7d02
SHA256

5f7ec38ef6addd60aa18ff3f860f60b77bc5328553fd33d914a3f0013b951f93
SHA512

ea15813b0d153b02dbf3005bfa20ec0d63b28062f41c42dbace9761a9ad6e13aad5e10d25232193470d0a7abdb5753a7b91c46807a76e70cf6808f5767f17703
SSDEEP

24576:R20kzYSsicMrevmSKSp2H6wVIXsBqcSkl5l/Hld:R23JSFAH6wVI5ql5V

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
4952	file.tmp
4452	KitFiles136.exe
868	VeIIh.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	KitFiles136.exe

Loads dropped DLL 1 IoCs

pid	Process
4952	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\is-NHB14.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\language\is-PF6V8.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-B4MGK.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-UAN5H.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-JKI5B.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-J3EJM.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-P673E.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-HPG7M.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-LM18S.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-E5OKR.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-DQ137.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0PFR5.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-ACIA1.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\KitFiles136.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3N71R.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
3820	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4452	KitFiles136.exe
4452	KitFiles136.exe
4452	KitFiles136.exe
4452	KitFiles136.exe
4452	KitFiles136.exe
4452	KitFiles136.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3820	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4988 wrote to memory of 4952	4988	file.exe	82
PID 4988 wrote to memory of 4952	4988	file.exe	82
PID 4988 wrote to memory of 4952	4988	file.exe	82
PID 4952 wrote to memory of 4452	4952	file.tmp	83
PID 4952 wrote to memory of 4452	4952	file.tmp	83
PID 4952 wrote to memory of 4452	4952	file.tmp	83
PID 4452 wrote to memory of 868	4452	KitFiles136.exe	84
PID 4452 wrote to memory of 868	4452	KitFiles136.exe	84
PID 4452 wrote to memory of 868	4452	KitFiles136.exe	84
PID 4452 wrote to memory of 2468	4452	KitFiles136.exe	92
PID 4452 wrote to memory of 2468	4452	KitFiles136.exe	92
PID 4452 wrote to memory of 2468	4452	KitFiles136.exe	92
PID 2468 wrote to memory of 3820	2468	cmd.exe	94
PID 2468 wrote to memory of 3820	2468	cmd.exe	94
PID 2468 wrote to memory of 3820	2468	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:4988
- C:\Users\Admin\AppData\Local\Temp\is-QDQ5C.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-QDQ5C.tmp\file.tmp" /SL5="$90060,869579,51712,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:4952
- - C:\Program Files (x86)\Split Files\KitFiles136.exe
    "C:\Program Files (x86)\Split Files\KitFiles136.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4452
  - - C:\Users\Admin\AppData\Roaming\{99cae5c0-1ab4-11ed-899c-806e6f6e6963}\VeIIh.exe
      4⤵
      Executes dropped EXE
      PID:868
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "KitFiles136.exe" /f & erase "C:\Program Files (x86)\Split Files\KitFiles136.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2468
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "KitFiles136.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3820

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\KitFiles136.exe

Filesize
1.6MB

MD5
a2e9f74f80b13b72e7659e0dd92f05a7

SHA1
23f3483950d128dcb6f752543670a10e16118ed6

SHA256
5a26e8043dd17c803cc9a4bc7d8f8e845a1923f1f2eee43f1cf1154f38c403fe

SHA512
5d28d8086ee222dd05f2f51559ed55c0bb55758e69fffdc1b1dd73ded35ee9bfcc656771fcfe44440b85a2554304e6bffcf1bf76efadde89f5b8a23f0097e2be

Download Submit
C:\Program Files (x86)\Split Files\KitFiles136.exe

Filesize
1.6MB

MD5
a2e9f74f80b13b72e7659e0dd92f05a7

SHA1
23f3483950d128dcb6f752543670a10e16118ed6

SHA256
5a26e8043dd17c803cc9a4bc7d8f8e845a1923f1f2eee43f1cf1154f38c403fe

SHA512
5d28d8086ee222dd05f2f51559ed55c0bb55758e69fffdc1b1dd73ded35ee9bfcc656771fcfe44440b85a2554304e6bffcf1bf76efadde89f5b8a23f0097e2be

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-31QVJ.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-QDQ5C.tmp\file.tmp

Filesize
692KB

MD5
011df348d33aeb3103be711e7aaad000

SHA1
eff06d4777d24ab7c2384737b846b7df7c9dd5ae

SHA256
4f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef

SHA512
e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-QDQ5C.tmp\file.tmp

Filesize
692KB

MD5
011df348d33aeb3103be711e7aaad000

SHA1
eff06d4777d24ab7c2384737b846b7df7c9dd5ae

SHA256
4f50389dd834b3268fcc673f791d82a61142eeb7baaa54a03668516df18507ef

SHA512
e4b76ac1058880a8ba633f0ff37657594a92231cc6093b80dc6c3617d3edd045f1a3592c2b04cf5acbdbb599d2e4b9e079a47e92692912f4f0d7d189dd14b375

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4452-143-0x0000000000400000-0x000000000139B000-memory.dmp

Filesize
15.6MB

Download
memory/4452-144-0x0000000000400000-0x000000000139B000-memory.dmp

Filesize
15.6MB

Download
memory/4452-142-0x0000000000400000-0x000000000139B000-memory.dmp

Filesize
15.6MB

Download
memory/4452-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4452-153-0x0000000000400000-0x000000000139B000-memory.dmp

Filesize
15.6MB

Download
memory/4452-156-0x0000000000400000-0x000000000139B000-memory.dmp

Filesize
15.6MB

Download
memory/4988-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4988-152-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4988-137-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4988-157-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download

Analysis

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