nymaim | f386a12fa695b9659cd3dc04e4e8d526b42e896b561a1ace96d34e254b8a4793

Analysis

max time kernel
63s
max time network
66s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
11-01-2023 22:01

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General

Target

file.exe
Size

1.2MB
MD5

ab56ee6ef0663b01ebb68a1b02025618
SHA1

b7a7b416dae99db471f4aa1d2baf1cf99384450b
SHA256

f386a12fa695b9659cd3dc04e4e8d526b42e896b561a1ace96d34e254b8a4793
SHA512

5aeafad3ea1285be422da5260ba31f3720054513d8c315483f2b5b69cd05429d05c9fc12b4d320fea43492b5fbe99b2976c400dca44c9f1e11f416bbb48c8b49
SSDEEP

24576:q20IYNMeV85KNyJZP7lMm0DMPVBZ0fn5ojE2C49cLagXC75ld1qSVpk:q2m7V85KN4ZP7l+DMNBZ0RIE2C+d1qai

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

pid	Process
1336	file.tmp
1940	LitFiles137.exe
972	mZaOfoSIiz.exe

Loads dropped DLL 6 IoCs

pid	Process
1388	file.exe
1336	file.tmp
1336	file.tmp
1336	file.tmp
1336	file.tmp
1940	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

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1N9C9.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-RKHRK.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-757GC.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-U42DV.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-E9SCQ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-EDNK7.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-0NV8M.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\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Split Files\is-PG3QJ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-FDK9I.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-QM0LG.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-6IUJ3.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-9DFMI.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-I74FL.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-DEIIJ.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
1580	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1940	LitFiles137.exe
1940	LitFiles137.exe
1940	LitFiles137.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1580	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 1336	1388	file.exe	26
PID 1388 wrote to memory of 1336	1388	file.exe	26
PID 1388 wrote to memory of 1336	1388	file.exe	26
PID 1388 wrote to memory of 1336	1388	file.exe	26
PID 1388 wrote to memory of 1336	1388	file.exe	26
PID 1388 wrote to memory of 1336	1388	file.exe	26
PID 1388 wrote to memory of 1336	1388	file.exe	26
PID 1336 wrote to memory of 1940	1336	file.tmp	27
PID 1336 wrote to memory of 1940	1336	file.tmp	27
PID 1336 wrote to memory of 1940	1336	file.tmp	27
PID 1336 wrote to memory of 1940	1336	file.tmp	27
PID 1940 wrote to memory of 972	1940	LitFiles137.exe	28
PID 1940 wrote to memory of 972	1940	LitFiles137.exe	28
PID 1940 wrote to memory of 972	1940	LitFiles137.exe	28
PID 1940 wrote to memory of 972	1940	LitFiles137.exe	28
PID 1940 wrote to memory of 900	1940	LitFiles137.exe	31
PID 1940 wrote to memory of 900	1940	LitFiles137.exe	31
PID 1940 wrote to memory of 900	1940	LitFiles137.exe	31
PID 1940 wrote to memory of 900	1940	LitFiles137.exe	31
PID 900 wrote to memory of 1580	900	cmd.exe	33
PID 900 wrote to memory of 1580	900	cmd.exe	33
PID 900 wrote to memory of 1580	900	cmd.exe	33
PID 900 wrote to memory of 1580	900	cmd.exe	33

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:1388
- C:\Users\Admin\AppData\Local\Temp\is-B8P9O.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-B8P9O.tmp\file.tmp" /SL5="$60120,1058313,212992,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:1336
- - 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:1940
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\mZaOfoSIiz.exe
      4⤵
      Executes dropped EXE
      PID:972
  - - 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:900
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "LitFiles137.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1580

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
19b92bd9f2f8857c7ff247f8bf7e65dd

SHA1
73508c8278c3a8ba9fa797e65d00f6cee9657f88

SHA256
4dd7f90458e5274b7a1b8c3bd99e9695def866db7be79851bb31c3605734aea1

SHA512
125aa5471669efbc624cc7eaaeebf3a3f098886276c211facabb68b47ede4398269f3192ecbea94bbcf54612a578e4cccd76df0dcd37fbc308d4aa20f27a285c

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

Filesize
1.8MB

MD5
19b92bd9f2f8857c7ff247f8bf7e65dd

SHA1
73508c8278c3a8ba9fa797e65d00f6cee9657f88

SHA256
4dd7f90458e5274b7a1b8c3bd99e9695def866db7be79851bb31c3605734aea1

SHA512
125aa5471669efbc624cc7eaaeebf3a3f098886276c211facabb68b47ede4398269f3192ecbea94bbcf54612a578e4cccd76df0dcd37fbc308d4aa20f27a285c

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-B8P9O.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-B8P9O.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}\mZaOfoSIiz.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
1.8MB

MD5
19b92bd9f2f8857c7ff247f8bf7e65dd

SHA1
73508c8278c3a8ba9fa797e65d00f6cee9657f88

SHA256
4dd7f90458e5274b7a1b8c3bd99e9695def866db7be79851bb31c3605734aea1

SHA512
125aa5471669efbc624cc7eaaeebf3a3f098886276c211facabb68b47ede4398269f3192ecbea94bbcf54612a578e4cccd76df0dcd37fbc308d4aa20f27a285c

Download Submit
\Users\Admin\AppData\Local\Temp\is-B8P9O.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
\Users\Admin\AppData\Local\Temp\is-C48I1.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-C48I1.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-C48I1.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}\mZaOfoSIiz.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1336-69-0x00000000036C0000-0x0000000004682000-memory.dmp

Filesize
15.8MB

Download
memory/1336-77-0x00000000036C0000-0x0000000004682000-memory.dmp

Filesize
15.8MB

Download
memory/1388-65-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1388-54-0x00000000768A1000-0x00000000768A3000-memory.dmp

Filesize
8KB

Download
memory/1388-87-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1388-55-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/1940-70-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/1940-79-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1940-83-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/1940-78-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/1940-73-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/1940-86-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/1940-71-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download