nymaim | 755cb3dd54a0a80d0e231d088a76c1804ff3c22d226acc6755f43b4e69282c0c

Analysis

max time kernel
57s
max time network
61s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
02/01/2023, 06:13

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General

Target

file.exe
Size

1.8MB
MD5

b2656744c707b7f77c23df863ec273e9
SHA1

57d87c1d3cfa12e51c4b23cea3d76e0b870e6688
SHA256

755cb3dd54a0a80d0e231d088a76c1804ff3c22d226acc6755f43b4e69282c0c
SHA512

4a289ec46f09caf6955d509787f59d3a1bf26b09895ff120e3caf9caae8b22eaedd55156f4200564de773591e5a3e6d2c161941ebae32997d3279057c22b98e2
SSDEEP

49152:Mi/uo2OK8likoaKoLaiWvbMqyOsbC8qUqHu71MSBk3n:Mi/p2OFWoOiWvwA8qU+SBk3n

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
1760	is-9JRV3.tmp
1280	SplitFiles128.exe
472	6v0PdEFb.exe

Loads dropped DLL 10 IoCs

pid	Process
1552	file.exe
1760	is-9JRV3.tmp
1760	is-9JRV3.tmp
1760	is-9JRV3.tmp
1760	is-9JRV3.tmp
1280	SplitFiles128.exe
1280	SplitFiles128.exe
1280	SplitFiles128.exe
472	6v0PdEFb.exe
472	6v0PdEFb.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 created	C:\Program Files (x86)\Split Files\language\is-HSQT5.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\language\is-50CN5.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\language\is-48IJU.tmp	is-9JRV3.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\is-RT2EF.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\language\is-01QGP.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3F1VJ.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\is-C4VPH.tmp	is-9JRV3.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles128.exe	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\language\is-JJCPS.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\is-2HSSL.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\is-P2I4G.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\language\is-4QN8I.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\language\is-6SNK9.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\language\is-H1KC6.tmp	is-9JRV3.tmp
File created	C:\Program Files (x86)\Split Files\is-49QOP.tmp	is-9JRV3.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
912	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1280	SplitFiles128.exe
1280	SplitFiles128.exe
1280	SplitFiles128.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	912	taskkill.exe
Token: SeRestorePrivilege	1760	is-9JRV3.tmp
Token: SeBackupPrivilege	1760	is-9JRV3.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1552 wrote to memory of 1760	1552	file.exe	26
PID 1552 wrote to memory of 1760	1552	file.exe	26
PID 1552 wrote to memory of 1760	1552	file.exe	26
PID 1552 wrote to memory of 1760	1552	file.exe	26
PID 1552 wrote to memory of 1760	1552	file.exe	26
PID 1552 wrote to memory of 1760	1552	file.exe	26
PID 1552 wrote to memory of 1760	1552	file.exe	26
PID 1760 wrote to memory of 1280	1760	is-9JRV3.tmp	27
PID 1760 wrote to memory of 1280	1760	is-9JRV3.tmp	27
PID 1760 wrote to memory of 1280	1760	is-9JRV3.tmp	27
PID 1760 wrote to memory of 1280	1760	is-9JRV3.tmp	27
PID 1760 wrote to memory of 1280	1760	is-9JRV3.tmp	27
PID 1760 wrote to memory of 1280	1760	is-9JRV3.tmp	27
PID 1760 wrote to memory of 1280	1760	is-9JRV3.tmp	27
PID 1280 wrote to memory of 472	1280	SplitFiles128.exe	28
PID 1280 wrote to memory of 472	1280	SplitFiles128.exe	28
PID 1280 wrote to memory of 472	1280	SplitFiles128.exe	28
PID 1280 wrote to memory of 472	1280	SplitFiles128.exe	28
PID 1280 wrote to memory of 472	1280	SplitFiles128.exe	28
PID 1280 wrote to memory of 472	1280	SplitFiles128.exe	28
PID 1280 wrote to memory of 472	1280	SplitFiles128.exe	28
PID 1280 wrote to memory of 1732	1280	SplitFiles128.exe	31
PID 1280 wrote to memory of 1732	1280	SplitFiles128.exe	31
PID 1280 wrote to memory of 1732	1280	SplitFiles128.exe	31
PID 1280 wrote to memory of 1732	1280	SplitFiles128.exe	31
PID 1280 wrote to memory of 1732	1280	SplitFiles128.exe	31
PID 1280 wrote to memory of 1732	1280	SplitFiles128.exe	31
PID 1280 wrote to memory of 1732	1280	SplitFiles128.exe	31
PID 1732 wrote to memory of 912	1732	cmd.exe	33
PID 1732 wrote to memory of 912	1732	cmd.exe	33
PID 1732 wrote to memory of 912	1732	cmd.exe	33
PID 1732 wrote to memory of 912	1732	cmd.exe	33
PID 1732 wrote to memory of 912	1732	cmd.exe	33
PID 1732 wrote to memory of 912	1732	cmd.exe	33
PID 1732 wrote to memory of 912	1732	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:1552
- C:\Users\Admin\AppData\Local\Temp\is-CV8K3.tmp\is-9JRV3.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-CV8K3.tmp\is-9JRV3.tmp" /SL4 $70124 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1623029 93184
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1760
- - C:\Program Files (x86)\Split Files\SplitFiles128.exe
    "C:\Program Files (x86)\Split Files\SplitFiles128.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1280
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\6v0PdEFb.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:472
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles128.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles128.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1732
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles128.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:912

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\SplitFiles128.exe

Filesize
3.3MB

MD5
e7605f8c4a73fcd8522c65b64d42e213

SHA1
e154f557d6c94a8d79a8acbf1cd57adf31a96535

SHA256
7ace428126098a89f2e1c85503d96d6d330319a74e7e1e6f657f966bdbb65c38

SHA512
ec09961df64cb7dec56d3136cc32808eedd3b541f2051fc6b9cfb8434f5bfd7bf35669591441e241c2db8e147d720d148a18469f64431b4d499c9e2196081d9f

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles128.exe

Filesize
3.3MB

MD5
e7605f8c4a73fcd8522c65b64d42e213

SHA1
e154f557d6c94a8d79a8acbf1cd57adf31a96535

SHA256
7ace428126098a89f2e1c85503d96d6d330319a74e7e1e6f657f966bdbb65c38

SHA512
ec09961df64cb7dec56d3136cc32808eedd3b541f2051fc6b9cfb8434f5bfd7bf35669591441e241c2db8e147d720d148a18469f64431b4d499c9e2196081d9f

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-CV8K3.tmp\is-9JRV3.tmp

Filesize
685KB

MD5
7f46188bafe719b5ba8e32c2e0037f21

SHA1
6dc19d768f6b24766cfcdf49f630b517174c780e

SHA256
3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

SHA512
5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-CV8K3.tmp\is-9JRV3.tmp

Filesize
685KB

MD5
7f46188bafe719b5ba8e32c2e0037f21

SHA1
6dc19d768f6b24766cfcdf49f630b517174c780e

SHA256
3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

SHA512
5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\6v0PdEFb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\6v0PdEFb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\SplitFiles128.exe

Filesize
3.3MB

MD5
e7605f8c4a73fcd8522c65b64d42e213

SHA1
e154f557d6c94a8d79a8acbf1cd57adf31a96535

SHA256
7ace428126098a89f2e1c85503d96d6d330319a74e7e1e6f657f966bdbb65c38

SHA512
ec09961df64cb7dec56d3136cc32808eedd3b541f2051fc6b9cfb8434f5bfd7bf35669591441e241c2db8e147d720d148a18469f64431b4d499c9e2196081d9f

Download Submit
\Program Files (x86)\Split Files\SplitFiles128.exe

Filesize
3.3MB

MD5
e7605f8c4a73fcd8522c65b64d42e213

SHA1
e154f557d6c94a8d79a8acbf1cd57adf31a96535

SHA256
7ace428126098a89f2e1c85503d96d6d330319a74e7e1e6f657f966bdbb65c38

SHA512
ec09961df64cb7dec56d3136cc32808eedd3b541f2051fc6b9cfb8434f5bfd7bf35669591441e241c2db8e147d720d148a18469f64431b4d499c9e2196081d9f

Download Submit
\Program Files (x86)\Split Files\SplitFiles128.exe

Filesize
3.3MB

MD5
e7605f8c4a73fcd8522c65b64d42e213

SHA1
e154f557d6c94a8d79a8acbf1cd57adf31a96535

SHA256
7ace428126098a89f2e1c85503d96d6d330319a74e7e1e6f657f966bdbb65c38

SHA512
ec09961df64cb7dec56d3136cc32808eedd3b541f2051fc6b9cfb8434f5bfd7bf35669591441e241c2db8e147d720d148a18469f64431b4d499c9e2196081d9f

Download Submit
\Users\Admin\AppData\Local\Temp\is-CV8K3.tmp\is-9JRV3.tmp

Filesize
685KB

MD5
7f46188bafe719b5ba8e32c2e0037f21

SHA1
6dc19d768f6b24766cfcdf49f630b517174c780e

SHA256
3c65b17529d5a22bbcb9f726f567f3a0506f6536bc5048789fd2f11c420ffd5e

SHA512
5c14cf51850c1e02765e86f7a166e7554425c3399e979ff75397a1c430e1c5099545eddd51e65b06790fb3cc9cbb70b70749438ec3277deba5a0eb4c3beb2bc3

Download Submit
\Users\Admin\AppData\Local\Temp\is-LU4EC.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-LU4EC.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-LU4EC.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}\6v0PdEFb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\6v0PdEFb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\6v0PdEFb.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1280-86-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1280-76-0x0000000001EB0000-0x0000000003002000-memory.dmp

Filesize
17.3MB

Download
memory/1280-77-0x0000000000400000-0x0000000001552000-memory.dmp

Filesize
17.3MB

Download
memory/1280-78-0x0000000000400000-0x0000000001552000-memory.dmp

Filesize
17.3MB

Download
memory/1280-75-0x0000000001EB0000-0x0000000003002000-memory.dmp

Filesize
17.3MB

Download
memory/1280-96-0x0000000000400000-0x0000000001552000-memory.dmp

Filesize
17.3MB

Download
memory/1280-74-0x0000000000400000-0x0000000001552000-memory.dmp

Filesize
17.3MB

Download
memory/1280-91-0x0000000000400000-0x0000000001552000-memory.dmp

Filesize
17.3MB

Download
memory/1552-55-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1552-65-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1552-54-0x0000000075681000-0x0000000075683000-memory.dmp

Filesize
8KB

Download
memory/1552-97-0x0000000000400000-0x000000000041D000-memory.dmp

Filesize
116KB

Download
memory/1760-73-0x0000000003830000-0x0000000004982000-memory.dmp

Filesize
17.3MB

Download
memory/1760-90-0x0000000003830000-0x0000000004982000-memory.dmp

Filesize
17.3MB

Download