nymaim | 0203151d8d9f2b8aed83bfff2ef741ceb99bfbf51597920b3fcf964b79abc330

Analysis

max time kernel
52s
max time network
53s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
11-01-2023 16:01

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General

Target

file.exe
Size

1.3MB
MD5

e515323a241312151e8f932ef7371036
SHA1

6d670259e846b3fa3b12e6271f0c00fc30ffa335
SHA256

0203151d8d9f2b8aed83bfff2ef741ceb99bfbf51597920b3fcf964b79abc330
SHA512

06f91bfdc24d9d91bce92a105e5c5ae5da82e7839e34b3122df404cbf07f346cbf330e58891b619052fa7c0e8fdee32380f9288e39e1979d13ba670fe857fa6f
SSDEEP

24576:q20I/91233SqM8i9CejEJXeGQHNnrOiD6mgXC75ld1qSVpk:q2b2yqE9ClJuGQHNnnd1qapk

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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

Processes:

file.tmpLitFiles137.exe7gZ2E3qO5cvF6H.exe

pid	Process
964	file.tmp
968	LitFiles137.exe
1120	7gZ2E3qO5cvF6H.exe

Loads dropped DLL 6 IoCs

Processes:

file.exefile.tmpLitFiles137.exe

pid	Process
852	file.exe
964	file.tmp
964	file.tmp
964	file.tmp
964	file.tmp
968	LitFiles137.exe

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

Processes:

file.tmp

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-6K1KS.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-EVH4E.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Split Files\LitFiles137.exe	file.tmp
File created	C:\Program Files (x86)\Split Files\is-TDOPO.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-HGTE9.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-O1B2A.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-6KON2.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-UJO2F.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-CLJ0N.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-O8KUC.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-AD91I.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-AJOG3.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\is-85F0F.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0DEH1.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0QGOQ.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

Processes:

taskkill.exe

pid	Process
1784	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

LitFiles137.exe

pid	Process
968	LitFiles137.exe
968	LitFiles137.exe
968	LitFiles137.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description	pid	Process
Token: SeDebugPrivilege	1784	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

file.exefile.tmpLitFiles137.execmd.exe

description	pid	Process	procid_target
PID 852 wrote to memory of 964	852	file.exe	28
PID 852 wrote to memory of 964	852	file.exe	28
PID 852 wrote to memory of 964	852	file.exe	28
PID 852 wrote to memory of 964	852	file.exe	28
PID 852 wrote to memory of 964	852	file.exe	28
PID 852 wrote to memory of 964	852	file.exe	28
PID 852 wrote to memory of 964	852	file.exe	28
PID 964 wrote to memory of 968	964	file.tmp	29
PID 964 wrote to memory of 968	964	file.tmp	29
PID 964 wrote to memory of 968	964	file.tmp	29
PID 964 wrote to memory of 968	964	file.tmp	29
PID 968 wrote to memory of 1120	968	LitFiles137.exe	30
PID 968 wrote to memory of 1120	968	LitFiles137.exe	30
PID 968 wrote to memory of 1120	968	LitFiles137.exe	30
PID 968 wrote to memory of 1120	968	LitFiles137.exe	30
PID 968 wrote to memory of 536	968	LitFiles137.exe	33
PID 968 wrote to memory of 536	968	LitFiles137.exe	33
PID 968 wrote to memory of 536	968	LitFiles137.exe	33
PID 968 wrote to memory of 536	968	LitFiles137.exe	33
PID 536 wrote to memory of 1784	536	cmd.exe	35
PID 536 wrote to memory of 1784	536	cmd.exe	35
PID 536 wrote to memory of 1784	536	cmd.exe	35
PID 536 wrote to memory of 1784	536	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:852
- C:\Users\Admin\AppData\Local\Temp\is-46H61.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-46H61.tmp\file.tmp" /SL5="$70122,1071862,212992,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:964
- - C:\Program Files (x86)\Split Files\LitFiles137.exe
    "C:\Program Files (x86)\Split Files\LitFiles137.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:968
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\7gZ2E3qO5cvF6H.exe
      4⤵
      Executes dropped EXE
      PID:1120
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "LitFiles137.exe" /f & erase "C:\Program Files (x86)\Split Files\LitFiles137.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:536
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "LitFiles137.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1784

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Split Files\LitFiles137.exe

Filesize
1.8MB

MD5
1a52a6742dd9b96952593ebd58232247

SHA1
1baf5fa9fcaed0939c25f70c95542f3aa56626bd

SHA256
1e4e70b205cc23ed4afb0b1033b36b29e278273701da5f9b520253e15e5bfa95

SHA512
b06af725c591a55cadb841f73ba91d49f3c17aade3ad5e39c9fcce7fd02975228815839e95cb264a657f224480fb4e16b22390a5de5a286cd336a13cacf79d43

Download Submit
C:\Program Files (x86)\Split Files\LitFiles137.exe

Filesize
1.8MB

MD5
1a52a6742dd9b96952593ebd58232247

SHA1
1baf5fa9fcaed0939c25f70c95542f3aa56626bd

SHA256
1e4e70b205cc23ed4afb0b1033b36b29e278273701da5f9b520253e15e5bfa95

SHA512
b06af725c591a55cadb841f73ba91d49f3c17aade3ad5e39c9fcce7fd02975228815839e95cb264a657f224480fb4e16b22390a5de5a286cd336a13cacf79d43

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-46H61.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-46H61.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\7gZ2E3qO5cvF6H.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\LitFiles137.exe

Filesize
1.8MB

MD5
1a52a6742dd9b96952593ebd58232247

SHA1
1baf5fa9fcaed0939c25f70c95542f3aa56626bd

SHA256
1e4e70b205cc23ed4afb0b1033b36b29e278273701da5f9b520253e15e5bfa95

SHA512
b06af725c591a55cadb841f73ba91d49f3c17aade3ad5e39c9fcce7fd02975228815839e95cb264a657f224480fb4e16b22390a5de5a286cd336a13cacf79d43

Download Submit
\Users\Admin\AppData\Local\Temp\is-46H61.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
\Users\Admin\AppData\Local\Temp\is-QFKRL.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-QFKRL.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-QFKRL.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\7gZ2E3qO5cvF6H.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/536-83-0x0000000000000000-mapping.dmp

Download
memory/852-86-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/852-55-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/852-68-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/852-54-0x0000000075FF1000-0x0000000075FF3000-memory.dmp

Filesize
8KB

Download
memory/964-81-0x0000000003610000-0x00000000045D2000-memory.dmp

Filesize
15.8MB

Download
memory/964-69-0x0000000003610000-0x00000000045D2000-memory.dmp

Filesize
15.8MB

Download
memory/964-58-0x0000000000000000-mapping.dmp

Download
memory/968-73-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/968-71-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/968-77-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/968-70-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/968-82-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/968-85-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/968-66-0x0000000000000000-mapping.dmp

Download
memory/1120-75-0x0000000000000000-mapping.dmp

Download
memory/1784-84-0x0000000000000000-mapping.dmp

Download