nymaim | 075000db5058368563101bf4d30e34518ed45898bb2b335189ce03c8b251aa18

General

Target

file.exe
Size

1.2MB
MD5

7910ef0cad74a4788d4bcc5ce2b88cfe
SHA1

6e51548e807f1e610894921e0f8138eed80e889d
SHA256

075000db5058368563101bf4d30e34518ed45898bb2b335189ce03c8b251aa18
SHA512

2ac43adfb325e75f28e33ff9564871736c092469222e181bc8c37d24644dcebf2cd3e6f0f47e25f113b4b834a1af985e708a306a2973c54cb8bc767b91b74325
SSDEEP

24576:tizOnNUT/YG98JCaFprBwERrre8LOagN3gZIY7eCLxYiu:GOnkmAaFFBbt5TgNQNeViu

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

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-HUJTQ.tmp
3896	PrintFolders.exe
1384	iPjNt9Cbx93.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	PrintFolders.exe

Loads dropped DLL 1 IoCs

pid	Process
1760	is-HUJTQ.tmp

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 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\is-6H81I.tmp	is-HUJTQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-86791.tmp	is-HUJTQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NMKR0.tmp	is-HUJTQ.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HUJTQ.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-HUJTQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-33OA8.tmp	is-HUJTQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-CRAOU.tmp	is-HUJTQ.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-HUJTQ.tmp
File created	C:\Program Files (x86)\PrintFolders\is-3OBRL.tmp	is-HUJTQ.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
4456	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3896	PrintFolders.exe
3896	PrintFolders.exe
3896	PrintFolders.exe
3896	PrintFolders.exe
3896	PrintFolders.exe
3896	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4456	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2224 wrote to memory of 1760	2224	file.exe	83
PID 2224 wrote to memory of 1760	2224	file.exe	83
PID 2224 wrote to memory of 1760	2224	file.exe	83
PID 1760 wrote to memory of 3896	1760	is-HUJTQ.tmp	84
PID 1760 wrote to memory of 3896	1760	is-HUJTQ.tmp	84
PID 1760 wrote to memory of 3896	1760	is-HUJTQ.tmp	84
PID 3896 wrote to memory of 1384	3896	PrintFolders.exe	85
PID 3896 wrote to memory of 1384	3896	PrintFolders.exe	85
PID 3896 wrote to memory of 1384	3896	PrintFolders.exe	85
PID 3896 wrote to memory of 2636	3896	PrintFolders.exe	94
PID 3896 wrote to memory of 2636	3896	PrintFolders.exe	94
PID 3896 wrote to memory of 2636	3896	PrintFolders.exe	94
PID 2636 wrote to memory of 4456	2636	cmd.exe	96
PID 2636 wrote to memory of 4456	2636	cmd.exe	96
PID 2636 wrote to memory of 4456	2636	cmd.exe	96

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2224
- C:\Users\Admin\AppData\Local\Temp\is-ER46I.tmp\is-HUJTQ.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-ER46I.tmp\is-HUJTQ.tmp" /SL4 $901C2 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1038542 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1760
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:3896
  - - C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iPjNt9Cbx93.exe
      4⤵
      Executes dropped EXE
      PID:1384
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2636
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4456

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\PrintFolders\PrintFolders.exe

Filesize
1.4MB

MD5
68cd661547ebcb7282e5ccddc05048f8

SHA1
8feb6bf7e84980aabbfde51c867d3293d9dfe9ae

SHA256
58f34cb3f0744edd1aa102ff719ba7f7e967b053f4b0b9eb58736cfca66da920

SHA512
2cbb8ec3a961afb369b3b6454e3b7e016658336d3af49048bc0c55b876e13f000065dd637a925831bab83b90485f51070bb0f60d700a58bfe8284f9de6547e02

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

Filesize
1.4MB

MD5
68cd661547ebcb7282e5ccddc05048f8

SHA1
8feb6bf7e84980aabbfde51c867d3293d9dfe9ae

SHA256
58f34cb3f0744edd1aa102ff719ba7f7e967b053f4b0b9eb58736cfca66da920

SHA512
2cbb8ec3a961afb369b3b6454e3b7e016658336d3af49048bc0c55b876e13f000065dd637a925831bab83b90485f51070bb0f60d700a58bfe8284f9de6547e02

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ER46I.tmp\is-HUJTQ.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ER46I.tmp\is-HUJTQ.tmp

Filesize
643KB

MD5
85b94e72c3f2d2b5464e2aaf3c9e242a

SHA1
ce7ccae5f50a990d059d59292d4a332979e162ba

SHA256
1441464feeef365573af18802c464769b7d3107624fde24604f57e386f97f1a7

SHA512
c0c27189989db482be9bda5b6b8b1441bdc5e9b0f3a414ccab4c4be516e7f99e25717845361a5b196114502faaaf21bec7aca91b497acd2e2396f49c31850880

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LT68I.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iPjNt9Cbx93.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{d6dc608d-2a27-11ed-a0e3-806e6f6e6963}\iPjNt9Cbx93.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2224-137-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/2224-156-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/2224-132-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/3896-143-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/3896-144-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/3896-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/3896-152-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/3896-142-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download
memory/3896-155-0x0000000000400000-0x0000000001372000-memory.dmp

Filesize
15.4MB

Download

Analysis

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