nymaim | 7e85d3e37c6fa1787b885119be9334f357b2625c730acf9bca4341d5a15b040f

Analysis

max time kernel
56s
max time network
58s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
23/12/2022, 17:01

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General

Target

file.exe
Size

2.0MB
MD5

4f1f0df4df53a416c393a4b0bc4aba4b
SHA1

752ed3ba57b632d813c45f0dffb0d2108d683e25
SHA256

7e85d3e37c6fa1787b885119be9334f357b2625c730acf9bca4341d5a15b040f
SHA512

e95a79198295bd5e137eac3df3561031e9590e2a7426a7709246a1c2318decf0bb2b047270f2ab3e9e8634bba93bed83d0f887f8dd407d37156b3a5f61b2430b
SSDEEP

49152:PGAfPnA39Nflv5K2PeBRpOH/+aYNhDyBtOEoBVKGWP7p3p:PG0PnEd3sf4A21oBVTGdp

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
2004	is-0AEFI.tmp
472	SplitFiles118.exe
680	PDBKIBNYF.exe

Loads dropped DLL 10 IoCs

pid	Process
2008	file.exe
2004	is-0AEFI.tmp
2004	is-0AEFI.tmp
2004	is-0AEFI.tmp
2004	is-0AEFI.tmp
472	SplitFiles118.exe
472	SplitFiles118.exe
472	SplitFiles118.exe
680	PDBKIBNYF.exe
680	PDBKIBNYF.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\unins000.dat	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KCJKU.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-FTTP2.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-K29CI.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\is-F1OV8.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\is-6MN85.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1IA7O.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1T3UF.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\is-EFC5A.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-8H3BE.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\is-40R7C.tmp	is-0AEFI.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\is-MVM0U.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-9UM2D.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-I80TS.tmp	is-0AEFI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-NVQ5E.tmp	is-0AEFI.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles118.exe	is-0AEFI.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
600	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
472	SplitFiles118.exe
472	SplitFiles118.exe
472	SplitFiles118.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	2004	is-0AEFI.tmp
Token: SeBackupPrivilege	2004	is-0AEFI.tmp
Token: SeDebugPrivilege	600	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 2004	2008	file.exe	28
PID 2008 wrote to memory of 2004	2008	file.exe	28
PID 2008 wrote to memory of 2004	2008	file.exe	28
PID 2008 wrote to memory of 2004	2008	file.exe	28
PID 2008 wrote to memory of 2004	2008	file.exe	28
PID 2008 wrote to memory of 2004	2008	file.exe	28
PID 2008 wrote to memory of 2004	2008	file.exe	28
PID 2004 wrote to memory of 472	2004	is-0AEFI.tmp	29
PID 2004 wrote to memory of 472	2004	is-0AEFI.tmp	29
PID 2004 wrote to memory of 472	2004	is-0AEFI.tmp	29
PID 2004 wrote to memory of 472	2004	is-0AEFI.tmp	29
PID 2004 wrote to memory of 472	2004	is-0AEFI.tmp	29
PID 2004 wrote to memory of 472	2004	is-0AEFI.tmp	29
PID 2004 wrote to memory of 472	2004	is-0AEFI.tmp	29
PID 472 wrote to memory of 680	472	SplitFiles118.exe	30
PID 472 wrote to memory of 680	472	SplitFiles118.exe	30
PID 472 wrote to memory of 680	472	SplitFiles118.exe	30
PID 472 wrote to memory of 680	472	SplitFiles118.exe	30
PID 472 wrote to memory of 680	472	SplitFiles118.exe	30
PID 472 wrote to memory of 680	472	SplitFiles118.exe	30
PID 472 wrote to memory of 680	472	SplitFiles118.exe	30
PID 472 wrote to memory of 1436	472	SplitFiles118.exe	33
PID 472 wrote to memory of 1436	472	SplitFiles118.exe	33
PID 472 wrote to memory of 1436	472	SplitFiles118.exe	33
PID 472 wrote to memory of 1436	472	SplitFiles118.exe	33
PID 472 wrote to memory of 1436	472	SplitFiles118.exe	33
PID 472 wrote to memory of 1436	472	SplitFiles118.exe	33
PID 472 wrote to memory of 1436	472	SplitFiles118.exe	33
PID 1436 wrote to memory of 600	1436	cmd.exe	35
PID 1436 wrote to memory of 600	1436	cmd.exe	35
PID 1436 wrote to memory of 600	1436	cmd.exe	35
PID 1436 wrote to memory of 600	1436	cmd.exe	35
PID 1436 wrote to memory of 600	1436	cmd.exe	35
PID 1436 wrote to memory of 600	1436	cmd.exe	35
PID 1436 wrote to memory of 600	1436	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:2008
- C:\Users\Admin\AppData\Local\Temp\is-SN5H1.tmp\is-0AEFI.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-SN5H1.tmp\is-0AEFI.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1813779 133120
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2004
- - C:\Program Files (x86)\Split Files\SplitFiles118.exe
    "C:\Program Files (x86)\Split Files\SplitFiles118.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:472
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\PDBKIBNYF.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:680
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles118.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles118.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1436
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles118.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:600

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\SplitFiles118.exe

Filesize
3.3MB

MD5
0fa9c04584e95f38af5b0198dda1ddaa

SHA1
0e59aa1fe81bcd7d6154a80c60dd29ccda073998

SHA256
401d0bfa2ef9183bf0f68df93bc32866fbbc2fd100a207b48794fc3f8558eba4

SHA512
0171dcdcb13c007db38ad49ef8c1cb251115c9953a13ff2dbef0d069a89f3b0d7e2225607730c04c90d535e1c755c2818ddc90273cfa1a27c96b6737b7c8af86

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles118.exe

Filesize
3.3MB

MD5
0fa9c04584e95f38af5b0198dda1ddaa

SHA1
0e59aa1fe81bcd7d6154a80c60dd29ccda073998

SHA256
401d0bfa2ef9183bf0f68df93bc32866fbbc2fd100a207b48794fc3f8558eba4

SHA512
0171dcdcb13c007db38ad49ef8c1cb251115c9953a13ff2dbef0d069a89f3b0d7e2225607730c04c90d535e1c755c2818ddc90273cfa1a27c96b6737b7c8af86

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-SN5H1.tmp\is-0AEFI.tmp

Filesize
723KB

MD5
703b4da86c2d38881230d26bc1051cb2

SHA1
13b9e7582e94cb6e4f703bc08a28c53cdc003019

SHA256
90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

SHA512
e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-SN5H1.tmp\is-0AEFI.tmp

Filesize
723KB

MD5
703b4da86c2d38881230d26bc1051cb2

SHA1
13b9e7582e94cb6e4f703bc08a28c53cdc003019

SHA256
90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

SHA512
e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\SplitFiles118.exe

Filesize
3.3MB

MD5
0fa9c04584e95f38af5b0198dda1ddaa

SHA1
0e59aa1fe81bcd7d6154a80c60dd29ccda073998

SHA256
401d0bfa2ef9183bf0f68df93bc32866fbbc2fd100a207b48794fc3f8558eba4

SHA512
0171dcdcb13c007db38ad49ef8c1cb251115c9953a13ff2dbef0d069a89f3b0d7e2225607730c04c90d535e1c755c2818ddc90273cfa1a27c96b6737b7c8af86

Download Submit
\Program Files (x86)\Split Files\SplitFiles118.exe

Filesize
3.3MB

MD5
0fa9c04584e95f38af5b0198dda1ddaa

SHA1
0e59aa1fe81bcd7d6154a80c60dd29ccda073998

SHA256
401d0bfa2ef9183bf0f68df93bc32866fbbc2fd100a207b48794fc3f8558eba4

SHA512
0171dcdcb13c007db38ad49ef8c1cb251115c9953a13ff2dbef0d069a89f3b0d7e2225607730c04c90d535e1c755c2818ddc90273cfa1a27c96b6737b7c8af86

Download Submit
\Program Files (x86)\Split Files\SplitFiles118.exe

Filesize
3.3MB

MD5
0fa9c04584e95f38af5b0198dda1ddaa

SHA1
0e59aa1fe81bcd7d6154a80c60dd29ccda073998

SHA256
401d0bfa2ef9183bf0f68df93bc32866fbbc2fd100a207b48794fc3f8558eba4

SHA512
0171dcdcb13c007db38ad49ef8c1cb251115c9953a13ff2dbef0d069a89f3b0d7e2225607730c04c90d535e1c755c2818ddc90273cfa1a27c96b6737b7c8af86

Download Submit
\Users\Admin\AppData\Local\Temp\is-H00M5.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-H00M5.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-H00M5.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-SN5H1.tmp\is-0AEFI.tmp

Filesize
723KB

MD5
703b4da86c2d38881230d26bc1051cb2

SHA1
13b9e7582e94cb6e4f703bc08a28c53cdc003019

SHA256
90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

SHA512
e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/472-92-0x0000000001C60000-0x0000000002DAD000-memory.dmp

Filesize
17.3MB

Download
memory/472-93-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/472-75-0x0000000001C60000-0x0000000002DAD000-memory.dmp

Filesize
17.3MB

Download
memory/472-76-0x0000000001C60000-0x0000000002DAD000-memory.dmp

Filesize
17.3MB

Download
memory/472-77-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/472-78-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/472-97-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/472-91-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/472-87-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/472-74-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/2004-70-0x00000000038B0000-0x00000000049FD000-memory.dmp

Filesize
17.3MB

Download
memory/2004-86-0x00000000038B0000-0x00000000049FD000-memory.dmp

Filesize
17.3MB

Download
memory/2008-54-0x00000000760C1000-0x00000000760C3000-memory.dmp

Filesize
8KB

Download
memory/2008-55-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2008-67-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/2008-98-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download