nymaim | dacb85c98dd51e073c0a7b0b42f3815231a477494c1e636d5b76a4fced11fb01

Analysis

max time kernel
58s
max time network
61s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
31/12/2022, 15:09

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General

Target

file.exe
Size

1.9MB
MD5

3fabdda65db58a7b676a9c4b162fef3e
SHA1

046e7be9bbe0f897d274434a5ce01b638c1958ce
SHA256

dacb85c98dd51e073c0a7b0b42f3815231a477494c1e636d5b76a4fced11fb01
SHA512

d04b348a78edb7951f8685b304e1e3f758468b2900909d005489655579711ce5f4f03d051cdb3fe67b7f5c93b1378fad66f2e5c2f789193ce6e774e68e52a712
SSDEEP

49152:CiUAFDNeMMs2C5hS2BcxjbjrYxc7Uy/5VeqjLX/nvYX0a:CiU+0Zs20hSCc5vM+QEjLvvYN

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
1188	is-P0DUE.tmp
1684	SplitFiles126.exe
1816	bIiiQ6cAUPFK.exe

Loads dropped DLL 10 IoCs

pid	Process
1436	file.exe
1188	is-P0DUE.tmp
1188	is-P0DUE.tmp
1188	is-P0DUE.tmp
1188	is-P0DUE.tmp
1684	SplitFiles126.exe
1684	SplitFiles126.exe
1684	SplitFiles126.exe
1816	bIiiQ6cAUPFK.exe
1816	bIiiQ6cAUPFK.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-PC03F.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\is-8NUT2.tmp	is-P0DUE.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles126.exe	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\language\is-DTULS.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0Q50U.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\is-NMHS4.tmp	is-P0DUE.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\language\is-10KME.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\language\is-14DSR.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\language\is-8VJ0M.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\is-47EK6.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\is-UE5S5.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\language\is-BP9I8.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\language\is-SA4NJ.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\is-LISB0.tmp	is-P0DUE.tmp
File created	C:\Program Files (x86)\Split Files\language\is-VL4SF.tmp	is-P0DUE.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
2028	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1684	SplitFiles126.exe
1684	SplitFiles126.exe
1684	SplitFiles126.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2028	taskkill.exe
Token: SeRestorePrivilege	1188	is-P0DUE.tmp
Token: SeBackupPrivilege	1188	is-P0DUE.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1436 wrote to memory of 1188	1436	file.exe	27
PID 1436 wrote to memory of 1188	1436	file.exe	27
PID 1436 wrote to memory of 1188	1436	file.exe	27
PID 1436 wrote to memory of 1188	1436	file.exe	27
PID 1436 wrote to memory of 1188	1436	file.exe	27
PID 1436 wrote to memory of 1188	1436	file.exe	27
PID 1436 wrote to memory of 1188	1436	file.exe	27
PID 1188 wrote to memory of 1684	1188	is-P0DUE.tmp	28
PID 1188 wrote to memory of 1684	1188	is-P0DUE.tmp	28
PID 1188 wrote to memory of 1684	1188	is-P0DUE.tmp	28
PID 1188 wrote to memory of 1684	1188	is-P0DUE.tmp	28
PID 1188 wrote to memory of 1684	1188	is-P0DUE.tmp	28
PID 1188 wrote to memory of 1684	1188	is-P0DUE.tmp	28
PID 1188 wrote to memory of 1684	1188	is-P0DUE.tmp	28
PID 1684 wrote to memory of 1816	1684	SplitFiles126.exe	29
PID 1684 wrote to memory of 1816	1684	SplitFiles126.exe	29
PID 1684 wrote to memory of 1816	1684	SplitFiles126.exe	29
PID 1684 wrote to memory of 1816	1684	SplitFiles126.exe	29
PID 1684 wrote to memory of 1816	1684	SplitFiles126.exe	29
PID 1684 wrote to memory of 1816	1684	SplitFiles126.exe	29
PID 1684 wrote to memory of 1816	1684	SplitFiles126.exe	29
PID 1684 wrote to memory of 2004	1684	SplitFiles126.exe	32
PID 1684 wrote to memory of 2004	1684	SplitFiles126.exe	32
PID 1684 wrote to memory of 2004	1684	SplitFiles126.exe	32
PID 1684 wrote to memory of 2004	1684	SplitFiles126.exe	32
PID 1684 wrote to memory of 2004	1684	SplitFiles126.exe	32
PID 1684 wrote to memory of 2004	1684	SplitFiles126.exe	32
PID 1684 wrote to memory of 2004	1684	SplitFiles126.exe	32
PID 2004 wrote to memory of 2028	2004	cmd.exe	34
PID 2004 wrote to memory of 2028	2004	cmd.exe	34
PID 2004 wrote to memory of 2028	2004	cmd.exe	34
PID 2004 wrote to memory of 2028	2004	cmd.exe	34
PID 2004 wrote to memory of 2028	2004	cmd.exe	34
PID 2004 wrote to memory of 2028	2004	cmd.exe	34
PID 2004 wrote to memory of 2028	2004	cmd.exe	34

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:1436
- C:\Users\Admin\AppData\Local\Temp\is-TE4IR.tmp\is-P0DUE.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-TE4IR.tmp\is-P0DUE.tmp" /SL4 $A011C "C:\Users\Admin\AppData\Local\Temp\file.exe" 1718822 209408
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1188
- - C:\Program Files (x86)\Split Files\SplitFiles126.exe
    "C:\Program Files (x86)\Split Files\SplitFiles126.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1684
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\bIiiQ6cAUPFK.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1816
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles126.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles126.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2004
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles126.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:2028

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\SplitFiles126.exe

Filesize
3.3MB

MD5
3f5016cba73cd6c0a4c40beced3311d2

SHA1
6fc402789024cefad9a5017b563d87a2ecbcc7a1

SHA256
8d891ab9ec41d40176360c5c003697b5a12796c69478c539e57357892e9fa7e7

SHA512
d1de06d3da2266201eed48928bc84edda7932c6c3443c5e1c1087358da83ca940840f0a61fc3ed34c2ef59b790ae117e266d8c337a2231f8c775074361655702

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles126.exe

Filesize
3.3MB

MD5
3f5016cba73cd6c0a4c40beced3311d2

SHA1
6fc402789024cefad9a5017b563d87a2ecbcc7a1

SHA256
8d891ab9ec41d40176360c5c003697b5a12796c69478c539e57357892e9fa7e7

SHA512
d1de06d3da2266201eed48928bc84edda7932c6c3443c5e1c1087358da83ca940840f0a61fc3ed34c2ef59b790ae117e266d8c337a2231f8c775074361655702

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-TE4IR.tmp\is-P0DUE.tmp

Filesize
798KB

MD5
79879462fcb12d62e92b4bfeba0d561f

SHA1
620fc7ef6fe45f32c64ee250864831323422749e

SHA256
5639f567be5695dc2a4b029185bf2ae9147e98a5194c01726f864ba2fbffcfd1

SHA512
32d38130a6963a829f60d3932fa1439b85bf0338b633c5fb62a9bb94df4567a9cbbbed83bc75b52992e8cefa7334dfe5065ba8d28d39839206898257c645a72d

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-TE4IR.tmp\is-P0DUE.tmp

Filesize
798KB

MD5
79879462fcb12d62e92b4bfeba0d561f

SHA1
620fc7ef6fe45f32c64ee250864831323422749e

SHA256
5639f567be5695dc2a4b029185bf2ae9147e98a5194c01726f864ba2fbffcfd1

SHA512
32d38130a6963a829f60d3932fa1439b85bf0338b633c5fb62a9bb94df4567a9cbbbed83bc75b52992e8cefa7334dfe5065ba8d28d39839206898257c645a72d

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\bIiiQ6cAUPFK.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\bIiiQ6cAUPFK.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\SplitFiles126.exe

Filesize
3.3MB

MD5
3f5016cba73cd6c0a4c40beced3311d2

SHA1
6fc402789024cefad9a5017b563d87a2ecbcc7a1

SHA256
8d891ab9ec41d40176360c5c003697b5a12796c69478c539e57357892e9fa7e7

SHA512
d1de06d3da2266201eed48928bc84edda7932c6c3443c5e1c1087358da83ca940840f0a61fc3ed34c2ef59b790ae117e266d8c337a2231f8c775074361655702

Download Submit
\Program Files (x86)\Split Files\SplitFiles126.exe

Filesize
3.3MB

MD5
3f5016cba73cd6c0a4c40beced3311d2

SHA1
6fc402789024cefad9a5017b563d87a2ecbcc7a1

SHA256
8d891ab9ec41d40176360c5c003697b5a12796c69478c539e57357892e9fa7e7

SHA512
d1de06d3da2266201eed48928bc84edda7932c6c3443c5e1c1087358da83ca940840f0a61fc3ed34c2ef59b790ae117e266d8c337a2231f8c775074361655702

Download Submit
\Program Files (x86)\Split Files\SplitFiles126.exe

Filesize
3.3MB

MD5
3f5016cba73cd6c0a4c40beced3311d2

SHA1
6fc402789024cefad9a5017b563d87a2ecbcc7a1

SHA256
8d891ab9ec41d40176360c5c003697b5a12796c69478c539e57357892e9fa7e7

SHA512
d1de06d3da2266201eed48928bc84edda7932c6c3443c5e1c1087358da83ca940840f0a61fc3ed34c2ef59b790ae117e266d8c337a2231f8c775074361655702

Download Submit
\Users\Admin\AppData\Local\Temp\is-9UE61.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-9UE61.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-9UE61.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-TE4IR.tmp\is-P0DUE.tmp

Filesize
798KB

MD5
79879462fcb12d62e92b4bfeba0d561f

SHA1
620fc7ef6fe45f32c64ee250864831323422749e

SHA256
5639f567be5695dc2a4b029185bf2ae9147e98a5194c01726f864ba2fbffcfd1

SHA512
32d38130a6963a829f60d3932fa1439b85bf0338b633c5fb62a9bb94df4567a9cbbbed83bc75b52992e8cefa7334dfe5065ba8d28d39839206898257c645a72d

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\bIiiQ6cAUPFK.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\bIiiQ6cAUPFK.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\bIiiQ6cAUPFK.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/1188-90-0x0000000003970000-0x0000000004ABF000-memory.dmp

Filesize
17.3MB

Download
memory/1188-73-0x0000000003970000-0x0000000004ABF000-memory.dmp

Filesize
17.3MB

Download
memory/1436-65-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1436-54-0x0000000075711000-0x0000000075713000-memory.dmp

Filesize
8KB

Download
memory/1436-98-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1436-55-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1684-75-0x0000000001AA0000-0x0000000002BEF000-memory.dmp

Filesize
17.3MB

Download
memory/1684-77-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/1684-74-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/1684-97-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/1684-86-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1684-76-0x0000000001AA0000-0x0000000002BEF000-memory.dmp

Filesize
17.3MB

Download
memory/1684-91-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/1684-92-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download
memory/1684-78-0x0000000000400000-0x000000000154F000-memory.dmp

Filesize
17.3MB

Download