nymaim | a1c545954906546bef6b50f065020afd116973dda0d5c88fc036d57733485331

Analysis

max time kernel
51s
max time network
54s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
11-01-2023 21:31

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General

Target

file.exe
Size

1.2MB
MD5

36777fe772c2ba4bb8a2bbd09479fc38
SHA1

cbda1771fad06d04119ca16f72c1aac3639dda9b
SHA256

a1c545954906546bef6b50f065020afd116973dda0d5c88fc036d57733485331
SHA512

97bdff84c2eeadf6f6646ec5fff1021676c0cb7018b9a0e8c0be4fde9bf79dfa60f523f194023b74fcee0ef9954204882a6bb3a25d9f2b8597afba5d5415c39f
SSDEEP

24576:q20IpqVl8iwLVQmd0sZeo9nKjaUXFpx0oY3qHcgXC75ld1qSVpk:q284d0XinKjaUXz6oY3qkd1qapk

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.exesJPCAu.exe

pid process

952 file.tmp
580 LitFiles137.exe
1496 sJPCAu.exe
Loads dropped DLL 6 IoCs

Processes:

file.exefile.tmpLitFiles137.exe

pid process

832 file.exe
952 file.tmp
952 file.tmp
952 file.tmp
952 file.tmp
580 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

pid	process
952	file.tmp
580	LitFiles137.exe
1496	sJPCAu.exe

pid	process
832	file.exe
952	file.tmp
952	file.tmp
952	file.tmp
952	file.tmp
580	LitFiles137.exe

Drops file in Program Files directory 17 IoCs

Processes:

file.tmp

description	ioc	process
File created	C:\Program Files (x86)\Split Files\language\is-SGIIL.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-5BO9G.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-ERLAJ.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-IGA52.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-GMAI7.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-L5CC3.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-GN1MA.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-OQ56S.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-BBGDV.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\language\is-RTGKM.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-UCJNK.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-LBN8O.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\language\is-MGO3P.tmp	file.tmp
File created	C:\Program Files (x86)\Split Files\is-6MTEG.tmp	file.tmp
File created	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

Processes:

taskkill.exe

pid process

1252 taskkill.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

LitFiles137.exe

pid process

580 LitFiles137.exe
580 LitFiles137.exe
580 LitFiles137.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 1252 taskkill.exe

pid	process
1252	taskkill.exe

pid	process
580	LitFiles137.exe
580	LitFiles137.exe
580	LitFiles137.exe

description	pid	process
Token: SeDebugPrivilege	1252	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

file.exefile.tmpLitFiles137.execmd.exe

description	pid	process	target process
PID 832 wrote to memory of 952	832	file.exe	file.tmp
PID 832 wrote to memory of 952	832	file.exe	file.tmp
PID 832 wrote to memory of 952	832	file.exe	file.tmp
PID 832 wrote to memory of 952	832	file.exe	file.tmp
PID 832 wrote to memory of 952	832	file.exe	file.tmp
PID 832 wrote to memory of 952	832	file.exe	file.tmp
PID 832 wrote to memory of 952	832	file.exe	file.tmp
PID 952 wrote to memory of 580	952	file.tmp	LitFiles137.exe
PID 952 wrote to memory of 580	952	file.tmp	LitFiles137.exe
PID 952 wrote to memory of 580	952	file.tmp	LitFiles137.exe
PID 952 wrote to memory of 580	952	file.tmp	LitFiles137.exe
PID 580 wrote to memory of 1496	580	LitFiles137.exe	sJPCAu.exe
PID 580 wrote to memory of 1496	580	LitFiles137.exe	sJPCAu.exe
PID 580 wrote to memory of 1496	580	LitFiles137.exe	sJPCAu.exe
PID 580 wrote to memory of 1496	580	LitFiles137.exe	sJPCAu.exe
PID 580 wrote to memory of 2044	580	LitFiles137.exe	cmd.exe
PID 580 wrote to memory of 2044	580	LitFiles137.exe	cmd.exe
PID 580 wrote to memory of 2044	580	LitFiles137.exe	cmd.exe
PID 580 wrote to memory of 2044	580	LitFiles137.exe	cmd.exe
PID 2044 wrote to memory of 1252	2044	cmd.exe	taskkill.exe
PID 2044 wrote to memory of 1252	2044	cmd.exe	taskkill.exe
PID 2044 wrote to memory of 1252	2044	cmd.exe	taskkill.exe
PID 2044 wrote to memory of 1252	2044	cmd.exe	taskkill.exe

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:832
- C:\Users\Admin\AppData\Local\Temp\is-9I9II.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9I9II.tmp\file.tmp" /SL5="$70122,1058642,212992,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:952
- - 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:580
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\sJPCAu.exe
      4⤵
      Executes dropped EXE
      PID:1496
  - - 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:2044
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "LitFiles137.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1252

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
a8a5a6d5c9f34f4362d81a25f63c24d8

SHA1
65e0205568d81de6337a3aab4099608fc14a8c06

SHA256
8f09952e9fec7500eae281ac7cdd82cc493197901e7ef9d238687fe61313f18e

SHA512
0eb1ff31288421def8b44195ef5e326ed59229d282466fadf6555a228da5110900b858909d86472dc5d6667879c914aa94fc61b532e59d5d984fbbe1c47083de

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

Filesize
1.8MB

MD5
a8a5a6d5c9f34f4362d81a25f63c24d8

SHA1
65e0205568d81de6337a3aab4099608fc14a8c06

SHA256
8f09952e9fec7500eae281ac7cdd82cc493197901e7ef9d238687fe61313f18e

SHA512
0eb1ff31288421def8b44195ef5e326ed59229d282466fadf6555a228da5110900b858909d86472dc5d6667879c914aa94fc61b532e59d5d984fbbe1c47083de

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-9I9II.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-9I9II.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}\sJPCAu.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
1.8MB

MD5
a8a5a6d5c9f34f4362d81a25f63c24d8

SHA1
65e0205568d81de6337a3aab4099608fc14a8c06

SHA256
8f09952e9fec7500eae281ac7cdd82cc493197901e7ef9d238687fe61313f18e

SHA512
0eb1ff31288421def8b44195ef5e326ed59229d282466fadf6555a228da5110900b858909d86472dc5d6667879c914aa94fc61b532e59d5d984fbbe1c47083de

Download Submit
\Users\Admin\AppData\Local\Temp\is-0RHGE.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-0RHGE.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-0RHGE.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-9I9II.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/580-70-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/580-77-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/580-85-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/580-82-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/580-71-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/580-73-0x0000000000400000-0x00000000013C2000-memory.dmp

Filesize
15.8MB

Download
memory/580-66-0x0000000000000000-mapping.dmp

Download
memory/832-68-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/832-54-0x0000000075701000-0x0000000075703000-memory.dmp

Filesize
8KB

Download
memory/832-86-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/832-55-0x0000000000400000-0x000000000043B000-memory.dmp

Filesize
236KB

Download
memory/952-58-0x0000000000000000-mapping.dmp

Download
memory/952-81-0x0000000003600000-0x00000000045C2000-memory.dmp

Filesize
15.8MB

Download
memory/952-69-0x0000000003600000-0x00000000045C2000-memory.dmp

Filesize
15.8MB

Download
memory/1252-84-0x0000000000000000-mapping.dmp

Download
memory/1496-75-0x0000000000000000-mapping.dmp

Download
memory/2044-83-0x0000000000000000-mapping.dmp

Download