nymaim | 783f93503dca5f7c960a8768a4cf7bccc8e97a30f014a0f80b684d109aa4bd29

General

Target

file.exe
Size

2.9MB
MD5

630e8cc0f1303b10dc869f855853797b
SHA1

8ebe5c9123822f8e7c1b04b05c22132129fef9e6
SHA256

783f93503dca5f7c960a8768a4cf7bccc8e97a30f014a0f80b684d109aa4bd29
SHA512

62654866b139b5e6eea4d36ae65336991130301b89e52527eccbe3d049a398b07fde8852bb3ba7c38722c9387e87a01c3f9c4bafee37048b121bb03471c8c139
SSDEEP

49152:Z2B4mLsuIZG96SBJXdELaTNXA5WL0cIIEmRM039GGYZjnIhw8J7QOXyrY5fleJAW:MeEsulZBJOLaRX1LFJEmrPY+5XjxDq

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
4876	is-5SH94.tmp
2056	ftsearcher71.exe
4796	vaRezC67dm.exe

Loads dropped DLL 1 IoCs

pid	Process
4876	is-5SH94.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 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\ftSearcher\is-1SMEQ.tmp	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\is-MSV31.tmp	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\is-DPA1A.tmp	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\is-5FT3Q.tmp	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\is-E3C88.tmp	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\is-R799U.tmp	is-5SH94.tmp
File opened for modification	C:\Program Files (x86)\ftSearcher\unins000.dat	is-5SH94.tmp
File opened for modification	C:\Program Files (x86)\ftSearcher\ftsearcher71.exe	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\unins000.dat	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\is-J37A1.tmp	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\is-NR2BP.tmp	is-5SH94.tmp
File created	C:\Program Files (x86)\ftSearcher\is-8HERK.tmp	is-5SH94.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2056	ftsearcher71.exe
2056	ftsearcher71.exe
2056	ftsearcher71.exe
2056	ftsearcher71.exe
2056	ftsearcher71.exe
2056	ftsearcher71.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2056	ftsearcher71.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 636 wrote to memory of 4876	636	file.exe	80
PID 636 wrote to memory of 4876	636	file.exe	80
PID 636 wrote to memory of 4876	636	file.exe	80
PID 4876 wrote to memory of 2056	4876	is-5SH94.tmp	81
PID 4876 wrote to memory of 2056	4876	is-5SH94.tmp	81
PID 4876 wrote to memory of 2056	4876	is-5SH94.tmp	81
PID 2056 wrote to memory of 4796	2056	ftsearcher71.exe	90
PID 2056 wrote to memory of 4796	2056	ftsearcher71.exe	90
PID 2056 wrote to memory of 4796	2056	ftsearcher71.exe	90

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:636
- C:\Users\Admin\AppData\Local\Temp\is-O3A0C.tmp\is-5SH94.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-O3A0C.tmp\is-5SH94.tmp" /SL4 $C01D0 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2794260 52736
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4876
- - C:\Program Files (x86)\ftSearcher\ftsearcher71.exe
    "C:\Program Files (x86)\ftSearcher\ftsearcher71.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:2056
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\vaRezC67dm.exe
      4⤵
      Executes dropped EXE
      PID:4796

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\ftSearcher\ftsearcher71.exe

Filesize
4.4MB

MD5
1ab3a375c9d27d8da53beec005ca5ef2

SHA1
7e85cbf4fc643715460c7c0aa2bd0cac5d426d5c

SHA256
fb75ac08d034ddaa4a3272778513af0bad912c1fb298af6f9148f22cabce4ddd

SHA512
e24009c3e337dff7601dc880a12dffa09095c11b2b5f1893f75ace5b9e6fde6b0b83d886a2c5ed79d4fcc2edd7259969112ae16e485ccfa81ccd8336102fdc6f

Download Submit
C:\Program Files (x86)\ftSearcher\ftsearcher71.exe

Filesize
4.4MB

MD5
1ab3a375c9d27d8da53beec005ca5ef2

SHA1
7e85cbf4fc643715460c7c0aa2bd0cac5d426d5c

SHA256
fb75ac08d034ddaa4a3272778513af0bad912c1fb298af6f9148f22cabce4ddd

SHA512
e24009c3e337dff7601dc880a12dffa09095c11b2b5f1893f75ace5b9e6fde6b0b83d886a2c5ed79d4fcc2edd7259969112ae16e485ccfa81ccd8336102fdc6f

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-A2VD1.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-O3A0C.tmp\is-5SH94.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-O3A0C.tmp\is-5SH94.tmp

Filesize
657KB

MD5
7cd12c54a9751ca6eee6ab0c85fb68f5

SHA1
76562e9b7888b6d20d67addb5a90b68b54a51987

SHA256
e82cabb027db8846c3430be760f137afa164c36f9e1b93a6e34c96de0b2c5a5f

SHA512
27ba5d2f719aaac2ead6fb42f23af3aa866f75026be897cd2f561f3e383904e89e6043bd22b4ae24f69787bd258a68ff696c09c03d656cbf7c79c2a52d8d82cc

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\vaRezC67dm.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\vaRezC67dm.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/636-137-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/636-132-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2056-142-0x0000000000400000-0x000000000165F000-memory.dmp

Filesize
18.4MB

Download
memory/2056-143-0x0000000000400000-0x000000000165F000-memory.dmp

Filesize
18.4MB

Download
memory/2056-144-0x0000000000400000-0x000000000165F000-memory.dmp

Filesize
18.4MB

Download
memory/2056-145-0x0000000000400000-0x000000000165F000-memory.dmp

Filesize
18.4MB

Download
memory/2056-149-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download

Analysis

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